CCM NG: Next part of WebDAV support

git-svn-id: https://svn.libreccm.org/ccm/ccm_ng@5374 8810af33-2d31-482b-a856-94f89814c4df

Former-commit-id: 28ce551e5e

ccm-core/src/main/java/org/libreccm/webdav/ConstantsAdapter.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav;
+
+import java.util.Collection;
+
+import javax.xml.bind.annotation.adapters.XmlAdapter;
+
+/**
+ * Guarantees that any unmarshalled enum constants effectively are the constant
+ * Java instances itself, so that {@code ==} can be used for comparison.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * Subclass must provide the constants to be used instead of an equal value by
+ * {@link #getConstants()}.
+ *
+ * @author unknown
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public abstract class ConstantsAdapter<T> extends XmlAdapter<T, T> {
+
+    @Override
+    public T unmarshal(final T value) throws Exception {
+
+        return value;
+
+    }
+
+    @Override
+    public T marshal(final T value) throws Exception {
+
+        return replaceValueByConstants(value, this.getConstants());
+    }
+
+    private static <T> T replaceValueByConstants(
+        final T value, final Collection<T> constants) {
+        
+        return constants
+            .stream()
+            .filter(constant -> constant.equals(value))
+            .findAny()
+            .orElse(value);
+        
+    }
+
+    /**
+     * @return Constant instances to be returned by {@link #marshal(Object)} as
+     *         a replacement for any equal instances. Must not be {@code null}.
+     */
+    protected abstract Collection<T> getConstants();
+
+}
+

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/ActiveLock.java

@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ * WebDAV {@code activelock} XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_activelock">Chapter
+ * 14.1 "activelock XML Element" of RFC 4918 "HTTP Extensions for Web
+ * Distributed Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlAccessorType(XmlAccessType.FIELD)
+@XmlType(propOrder = {"lockScope",
+                      "lockType",
+                      "depth",
+                      "owner",
+                      "timeOut",
+                      "lockToken",
+                      "lockRoot"})
+@XmlRootElement(name = "activelock")
+public class ActiveLock {
+
+    @XmlElement(name = "lockscope")
+    private final LockScope lockScope;
+
+    @XmlElement(name = "locktype")
+    private final LockType lockType;
+
+    private final Depth depth;
+
+    private final Owner owner;
+
+    @XmlElement(name = "timeout")
+    private final TimeOut timeOut;
+
+    @XmlElement(name = "locktoken")
+    private final LockToken lockToken;
+
+    @XmlElement(name = "lockroot")
+    private final LockRoot lockRoot;
+
+    private ActiveLock() {
+        this.lockScope = null;
+        this.lockType = null;
+        this.depth = null;
+        this.owner = null;
+        this.timeOut = null;
+        this.lockToken = null;
+        this.lockRoot = null;
+    }
+
+    public ActiveLock(final LockScope lockScope,
+                      final LockType lockType,
+                      final Depth depth,
+                      final Owner owner,
+                      final TimeOut timeOut,
+                      final LockToken lockToken,
+                      final LockRoot lockRoot) {
+
+        this.lockScope = Objects.requireNonNull(lockScope, "lockScope");
+        this.lockType = Objects.requireNonNull(lockType, "lockType");
+        this.depth = Objects.requireNonNull(depth, "depth");
+        this.owner = owner;
+        this.timeOut = timeOut;
+        this.lockToken = lockToken;
+        this.lockRoot = Objects.requireNonNull(lockRoot, "lockRoot");
+    }
+
+    public final LockScope getLockScope() {
+        return this.lockScope;
+    }
+
+    public final LockType getLockType() {
+        return this.lockType;
+    }
+
+    public final Depth getDepth() {
+        return this.depth;
+    }
+
+    public final Owner getOwner() {
+        return this.owner;
+    }
+
+    public final TimeOut getTimeOut() {
+        return this.timeOut;
+    }
+
+    public final LockToken getLockToken() {
+        return this.lockToken;
+    }
+
+    public final LockRoot getLockRoot() {
+        return this.lockRoot;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 71 * hash + Objects.hashCode(lockScope);
+        hash = 71 * hash + Objects.hashCode(lockType);
+        hash = 71 * hash + Objects.hashCode(depth);
+        hash = 71 * hash + Objects.hashCode(owner);
+        hash = 71 * hash + Objects.hashCode(timeOut);
+        hash = 71 * hash + Objects.hashCode(lockToken);
+        hash = 71 * hash + Objects.hashCode(lockRoot);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof ActiveLock)) {
+            return false;
+        }
+        final ActiveLock other = (ActiveLock) obj;
+        if (!Objects.equals(lockScope, other.getLockScope())) {
+            return false;
+        }
+        if (!Objects.equals(lockType, other.getLockType())) {
+            return false;
+        }
+        if (depth != other.getDepth()) {
+            return false;
+        }
+        if (!Objects.equals(owner, other.getOwner())) {
+            return false;
+        }
+        if (!Objects.equals(timeOut, other.getTimeOut())) {
+            return false;
+        }
+        if (!Objects.equals(lockToken, other.getLockToken())) {
+            return false;
+        }
+        return Objects.equals(lockRoot, other.getLockRoot());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{ lockScope = %s, "
+            + "lockType = %s, "
+            + "depth = %s, "
+            + "owner = %s,"
+            + "timeOut = %s, "
+            + "lockToken = %s, "
+            + "lockRoot = %s }",
+                             super.toString(),
+                             Objects.toString(lockScope),
+                             Objects.toString(lockType),
+                             Objects.toString(depth),
+                             Objects.toString(owner),
+                             Objects.toString(timeOut),
+                             Objects.toString(lockToken),
+                             Objects.toString(lockRoot));
+    }
+    
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/AllProp.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ * WebDAV allprop XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * This is a singleton. All instances are absolutely identical, hence can be
+ * compared using {@code ==} and share one unique hash code. Use
+ * {@link #ALLPROP} always.
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_allprop">Chapter
+ * 14.2 "allprop XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlRootElement(name = "allprop")
+@XmlType(factoryMethod = "createSingleton")
+public final class AllProp {
+
+    /**
+     * Singleton instance, providing improved performance and the ability to
+     * compare by <em>same</em> instance.
+     *
+     * @since 1.2
+     */
+    public static final AllProp ALLPROP = new AllProp();
+
+    private AllProp() {
+        // For unmarshalling only.
+    }
+
+    /**
+     * Singleton factory to be used solely by JAXB.
+     */
+    @SuppressWarnings("unused")
+    private static AllProp createSingleton() {
+        return ALLPROP;
+    }
+
+    @Override
+    public final String toString() {
+        return getClass().getSimpleName();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Collection.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+/**
+ * WebDAV collection XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * * This is a singleton. All instances are absolutely identical, hence can be
+ * compared using {@code ==} and share one unique hash code. Use
+ * {@link #COLLECTION} always.
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_activelock">Chapter
+ * 14.3 "collection XML Element" of RFC 4918 "HTTP Extensions for Web
+ * Distributed Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+public final class Collection {
+
+    private Collection() {
+        // For unmarshalling only.
+    }
+
+    /**
+     * Singleton instance, providing improved performance and the ability to
+     * compare by <em>same</em> instance.
+     *
+     * @since 1.2
+     */
+    public static final Collection COLLECTION = new Collection();
+
+    /**
+     * Singleton factory to be used solely by JAXB.
+     */
+    @SuppressWarnings("unused")
+    private static Collection createSingleton() {
+        return COLLECTION;
+    }
+    
+    @Override
+    public String toString() {
+        return getClass().getSimpleName();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Depth.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlEnumValue;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ *
+ * WebDAV depth XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_depth">Chapter
+ * 14.4 "depth XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlRootElement
+public enum Depth {
+
+    @XmlEnumValue("0")
+    ZERO,
+    @XmlEnumValue("1")
+    ONE,
+    @XmlEnumValue("infinity")
+    INFINITY
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Error.java

@@ -0,0 +1,99 @@
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAnyElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+import static java.util.Collections.*;
+
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+/**
+ *
+ * WebDAV error XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_error">Chapter
+ * 14.5 "error XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlRootElement
+public final class Error {
+
+    @XmlAnyElement(lax = true)
+    public final List<Object> errors;
+
+    @SuppressWarnings("unused")
+    private Error() {
+        errors = new LinkedList<>();
+    }
+
+    public Error(final Object error, final Object... errors) {
+
+        Objects.requireNonNull(error);
+
+        this.errors = new LinkedList<>();
+        this.errors.add(error);
+        this.errors.addAll(Arrays.asList(errors));
+    }
+
+    public final List<Object> getErrors() {
+        return unmodifiableList(this.errors);
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 83 * hash + Objects.hashCode(errors);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof Error)) {
+            return false;
+        }
+        final Error other = (Error) obj;
+        return Objects.equals(errors, other.errors);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ errors = %s }",
+                             super.toString(),
+                             Objects.toString(errors));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Exclusive.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ * WebDAV exclusive XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * <p>
+ * This is a singleton. All instances are absolutely identical, hence can be
+ * compared using {@code ==} and share one unique hash code. Use
+ * {@link #EXCLUSIVE} always.
+ * </p>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_exclusive">Chapter
+ * 14.6 "exclusive XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlRootElement
+@XmlType(factoryMethod = "createSingleton")
+public class Exclusive {
+
+    /**
+     * Singleton instance, providing improved performance and the ability to
+     * compare by <em>same</em> instance.
+     *
+     * @since 1.2
+     */
+    public static final Exclusive EXCLUSIVE = new Exclusive();
+
+    private static Exclusive createSingleton() {
+        return EXCLUSIVE;
+    }
+
+    private Exclusive() {
+        // For unmarshalling only.
+    }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName();
+    }
+    
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/HRef.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlValue;
+
+/**
+ *
+ * WebDAV href XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_href">Chapter
+ * 14.7 "href XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlRootElement(name = "href")
+public final class HRef {
+
+    @XmlValue
+    private final String value;
+
+    private HRef() {
+        this.value = null;
+    }
+
+    public HRef(final URI uri) {
+
+        Objects.requireNonNull(uri);
+        value = uri.toString();
+    }
+
+    public HRef(final String uri) {
+
+        Objects.requireNonNull(uri);
+        value = uri;
+    }
+
+    /**
+     * @return Value as a <code>URI</code> instance, if the value is a valid
+     *         URI; <code>null</code> otherwise.
+     *
+     * @throws java.net.URISyntaxException
+     */
+    public final URI getURI() throws URISyntaxException {
+        return new URI(this.value);
+    }
+
+    public final String getValue() {
+        return this.value;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 59 * hash + Objects.hashCode(value);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        final HRef other = (HRef) obj;
+        return Objects.equals(value, other.getValue());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{ %s }", 
+                             super.toString(),
+                             value);
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Include.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAnyElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+
+
+/**
+ * WebDAV include XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_include">Chapter
+ * 14.8 "include XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlRootElement
+public final class Include {
+
+    @XmlAnyElement(lax = true)
+    private final List<Object> includes;
+
+    @SuppressWarnings("unused")
+    private Include() {
+        this.includes = new LinkedList<>();
+    }
+
+    public Include(final Object... includes) {
+        
+        Objects.requireNonNull(includes);
+        
+        this.includes = Arrays.asList(includes);
+    }
+
+    public final List<Object> getIncludes() {
+        return Collections.unmodifiableList(this.includes);
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 17 * hash + Objects.hashCode(includes);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof Include)) {
+            return false;
+        }
+        final Include other = (Include) obj;
+        return Objects.equals(includes, other.getIncludes());
+    }
+    
+    @Override
+    public String toString() {
+        
+        return String.format("%s{ includes = %s }",
+                             super.toString(),
+                             Objects.toString(includes));
+    }
+    
+    
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Location.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ * WebDAV location XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_location">Chapter
+ * 14.9 "location XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlRootElement
+public final class Location {
+
+    @XmlElement(name = "href")
+    private final HRef hRef;
+
+    @SuppressWarnings("unused")
+    private Location() {
+        this.hRef = null;
+    }
+
+    public Location(final HRef hRef) {
+
+        Objects.requireNonNull(hRef);
+
+        this.hRef = hRef;
+    }
+
+    public final HRef getHRef() {
+        return this.hRef;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 37 * hash + Objects.hashCode(hRef);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof Location)) {
+            return false;
+        }
+        final Location other = (Location) obj;
+        return Objects.equals(hRef, other.getHRef());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ href = %s }",
+                             Objects.toString(hRef));
+    }
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/LockEntry.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ * WebDAV lockentry XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_lockentry">Chapter
+ * 14.10 "lockentry XML Element" of RFC 4918 "HTTP Extensions for Web
+ * Distributed Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlType(propOrder = {"lockScope", "lockType"})
+@XmlRootElement(name = "lockentry")
+public final class LockEntry {
+
+    @XmlElement(name = "lockscope")
+    private final LockScope lockScope;
+
+    @XmlElement(name = "locktype")
+    private final LockType lockType;
+
+    @SuppressWarnings("unused")
+    private LockEntry() {
+        this.lockScope = null;
+        this.lockType = null;
+    }
+
+    public LockEntry(final LockScope lockScope, final LockType lockType) {
+
+        Objects.requireNonNull(lockScope);
+        Objects.requireNonNull(lockType);
+
+        this.lockScope = lockScope;
+        this.lockType = lockType;
+    }
+
+    public final LockScope getLockScope() {
+        return this.lockScope;
+    }
+
+    public final LockType getLockType() {
+        return this.lockType;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 59 * hash + Objects.hashCode(lockScope);
+        hash = 59 * hash + Objects.hashCode(lockType);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof LockEntry)) {
+            return false;
+        }
+        final LockEntry other = (LockEntry) obj;
+        if (!Objects.equals(lockScope, other.getLockScope())) {
+            return false;
+        }
+        return Objects.equals(lockType, other.getLockType());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ lockScope = %s,"
+                                 + "lockType = %s }",
+                             super.toString(),
+                             Objects.toString(lockScope),
+                             Objects.toString(lockType));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/LockInfo.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ * WebDAV lockinfo XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_lockinfo">Chapter
+ * 14.11 "lockinfo XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlType(propOrder = {"lockScope", "lockType", "owner"})
+@XmlRootElement(name = "lockinfo")
+public final class LockInfo {
+
+    @XmlElement(name = "lockscope")
+    private final LockScope lockScope;
+
+    @XmlElement(name = "locktype")
+    private final LockType lockType;
+
+    @XmlElement
+    private final Owner owner;
+
+    @SuppressWarnings("unused")
+    private LockInfo() {
+        this.lockScope = null;
+        this.lockType = null;
+        this.owner = null;
+    }
+
+    public LockInfo(final LockScope lockScope,
+                    final LockType lockType,
+                    final Owner owner) {
+
+        this.lockScope = Objects.requireNonNull(lockScope);
+        this.lockType = Objects.requireNonNull(lockType);
+        this.owner = Objects.requireNonNull(owner);
+    }
+
+    public final LockScope getLockScope() {
+        return this.lockScope;
+    }
+
+    public final LockType getLockType() {
+        return this.lockType;
+    }
+
+    public final Owner getOwner() {
+        return this.owner;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 5;
+        hash = 67 * hash + Objects.hashCode(lockScope);
+        hash = 67 * hash + Objects.hashCode(lockType);
+        hash = 67 * hash + Objects.hashCode(owner);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof LockInfo)) {
+            return false;
+        }
+        final LockInfo other = (LockInfo) obj;
+        if (!Objects.equals(lockScope, other.getLockScope())) {
+            return false;
+        }
+        if (!Objects.equals(lockType, other.getLockType())) {
+            return false;
+        }
+        return Objects.equals(owner, other.getOwner());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ "
+                                 + "lockScope = %s, "
+                                 + "lockType = %s,"
+                                 + "owner = %s"
+                                 + " }",
+                             super.toString(),
+                             Objects.toString(lockScope),
+                             Objects.toString(lockType),
+                             Objects.toString(owner));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/LockRoot.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ *
+ * WebDAV lockroot XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_lockroot">Chapter
+ * 14.12 "lockroot XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlRootElement(name = "lockroot")
+public class LockRoot {
+
+    @XmlElement(name = "href")
+    private final HRef hRef;
+
+    @SuppressWarnings("unused")
+    private LockRoot() {
+        this.hRef = null;
+    }
+
+    public LockRoot(final HRef hRef) {
+
+        Objects.requireNonNull(hRef);
+
+        this.hRef = hRef;
+    }
+
+    public final HRef getHRef() {
+        return this.hRef;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 83 * hash + Objects.hashCode(this.hRef);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof LockRoot)) {
+            return false;
+        }
+        final LockRoot other = (LockRoot) obj;
+        return Objects.equals(hRef, other.getHRef());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{ hRef = %s }",
+                             super.toString(),
+                             Objects.toString(hRef));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/LockScope.java

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import org.libreccm.webdav.ConstantsAdapter;
+
+import java.util.Collection;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
+
+import static java.util.Arrays.*;
+import static javax.xml.bind.annotation.XmlAccessType.FIELD;
+
+/**
+ * WebDAV lockscope XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_lockscope">Chapter
+ * 14.13 "lockscope XML Element" of RFC 4918 "HTTP Extensions for Web
+ * Distributed Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlAccessorType(FIELD)
+@XmlType(propOrder = {"exclusive", "shared"})
+@XmlJavaTypeAdapter(LockScope.Adapter.class)
+@XmlRootElement(name = "lockscope")
+public final class LockScope {
+
+    public static final LockScope SHARED = new LockScope(Shared.SHARED, null);
+
+    public static final LockScope EXCLUSIVE = new LockScope(null,
+                                                            Exclusive.EXCLUSIVE);
+
+    private final Shared shared;
+
+    private final Exclusive exclusive;
+
+    private LockScope() {
+        this.shared = null;
+        this.exclusive = null;
+    }
+
+    private LockScope(final Shared shared, final Exclusive exclusive) {
+        this.shared = shared;
+        this.exclusive = exclusive;
+    }
+
+    protected Shared getShared() {
+        return shared;
+    }
+
+    protected Exclusive getExclusive() {
+        return exclusive;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 5;
+        hash = 97 * hash + Objects.hashCode(shared);
+        hash = 97 * hash + Objects.hashCode(exclusive);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof LockScope)) {
+            return false;
+        }
+        final LockScope other = (LockScope) obj;
+        if (!Objects.equals(shared, other.getShared())) {
+            return false;
+        }
+        return Objects.equals(exclusive, other.getExclusive());
+    }
+
+    /**
+     * Guarantees that any unmarshalled enum constants effectively are the
+     * constant Java instances itself, so that {@code ==} can be used form
+     * comparison.
+     *
+     */
+    protected static final class Adapter extends ConstantsAdapter<LockScope> {
+
+        @Override
+        protected final Collection<LockScope> getConstants() {
+            return asList(SHARED, EXCLUSIVE);
+        }
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{ shared = %s, exclusive = %s }",
+                             super.toString(),
+                             Objects.toString(shared),
+                             Objects.toString(exclusive));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/LockToken.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ * WebDAV locktoken XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_locktoken">Chapter
+ * 14.4 "locktoken XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ *
+ */
+@XmlRootElement(name = "locktoken")
+public final class LockToken {
+
+    @XmlElement(name = "href")
+    private final HRef hRef;
+
+    private LockToken() {
+        this.hRef = null;
+    }
+
+    public LockToken(final HRef hRef) {
+        
+        Objects.requireNonNull(hRef);
+        
+        this.hRef = hRef;
+    }
+
+    public final HRef getHRef() {
+        return this.hRef;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 97 * hash + Objects.hashCode(hRef);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof LockToken)) {
+            return false;
+        }
+        final LockToken other = (LockToken) obj;
+        return Objects.equals(hRef, other.getHRef());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{ %s }",
+                             super.toString(),
+                             Objects.toString(hRef));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/LockType.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+
+/**
+ *
+ * WebDAV locktype XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * <p>
+ * This is a singleton. All instances are absolutely identical, hence can be
+ * compared using {@code ==} and share one unique hash code. Use {@link #WRITE}
+ * always.
+ * </p>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_locktype">Chapter
+ * 14.15 "locktype XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlAccessorType(XmlAccessType.FIELD)
+@XmlRootElement(name = "locktype")
+@XmlType(factoryMethod = "createSingleton")
+public final class LockType {
+
+    /**
+     * Singleton instance, providing improved performance and the ability to
+     * compare by <em>same</em> instance.
+     */
+    public static final LockType WRITE = new LockType(Write.WRITE);
+
+    private static LockType createSingleton() {
+        return WRITE;
+    }
+
+    @SuppressWarnings("unused")
+    private final Write write;
+
+    private LockType() {
+        this.write = null;
+    }
+
+    // Enum
+    private LockType(final Write write) {
+        this.write = write;
+    }
+    
+    protected Write getWrite() {
+        return write;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 5;
+        hash = 37 * hash + Objects.hashCode(write);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof LockType)) {
+            return false;
+        }
+        final LockType other = (LockType) obj;
+        return Objects.equals(write, other.getWrite());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{  }",
+                             super.toString(),
+                             Objects.toString(write));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/MultiStatus.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ * WebDAV multistatus XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_multistatus">Chapter
+ * 14.16 "multistatus XML Element" of RFC 4918 "HTTP Extensions for Web
+ * Distributed Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlType(propOrder = {"responses", "responseDescription"})
+@XmlRootElement(name = "multistatus")
+public final class MultiStatus {
+
+    @XmlElement(name = "response")
+    private final List<Response> responses;
+
+    @XmlElement(name = "responsedescription")
+    private final ResponseDescription responseDescription;
+
+    public MultiStatus() {
+        this.responses = new LinkedList<>();
+        this.responseDescription = null;
+    }
+
+    public MultiStatus(final ResponseDescription responseDescription,
+                       final Response... responses) {
+
+        if (responses == null || responses.length == 0) {
+            this.responses = Collections.emptyList();
+        } else {
+            this.responses = Arrays.asList(responses);
+        }
+
+        this.responseDescription = responseDescription;
+    }
+
+    public MultiStatus(final Response... responses) {
+        this(null, responses);
+    }
+
+    public MultiStatus(final ResponseDescription responseDescription) {
+        this(responseDescription, (Response[]) null);
+    }
+
+    public final List<Response> getResponses() {
+        return Collections.unmodifiableList(responses);
+    }
+
+    public final ResponseDescription getResponseDescription() {
+        return this.responseDescription;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 47 * hash + Objects.hashCode(responses);
+        hash = 47 * hash + Objects.hashCode(responseDescription);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof MultiStatus)) {
+            return false;
+        }
+        final MultiStatus other = (MultiStatus) obj;
+        if (!Objects.equals(responses, other.getResponses())) {
+            return false;
+        }
+        return Objects.equals(responseDescription,
+                              other.getResponseDescription());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ responses = %s, "
+                                 + "responseDescription = %s }",
+                             super.toString(),
+                             Objects.toString(responses),
+                             Objects.toString(responseDescription));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Owner.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAnyElement;
+import javax.xml.bind.annotation.XmlMixed;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ * WebDAV owner XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_owner">Chapter
+ * 14.17 "owner XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlRootElement
+public final class Owner {
+
+    @XmlMixed
+    @XmlAnyElement(lax = true)
+    private final List<Object> any;
+
+    private Owner() {
+        any = new LinkedList<>();
+    }
+
+    public Owner(final Object... any) {
+        
+        Objects.requireNonNull(any);
+        this.any = Arrays.asList(any);
+    }
+
+    public final List<Object> getAny() {
+        return Collections.unmodifiableList(any);
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 23 * hash + Objects.hashCode(any);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof Owner)) {
+            return false;
+        }
+        final Owner other = (Owner) obj;
+        return Objects.equals(any, other.getAny());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{ %s }",
+                             super.toString(),
+                             Objects.toString(any));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Prop.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAnyElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+
+/**
+ *
+ * WebDAV prop XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_prop">Chapter
+ * 14.18 "prop XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlRootElement
+public final class Prop {
+
+    @XmlAnyElement(lax = true)
+    private final List<Object> properties;
+
+    @SuppressWarnings("unused")
+    private Prop() {
+        // For unmarshalling only.
+        properties = new LinkedList<>();
+    }
+
+    public Prop(final Object... any) {
+        properties = Arrays.asList(any);
+    }
+
+    public final List<Object> getProperties() {
+        return Collections.unmodifiableList(properties);
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 43 * hash + Objects.hashCode(properties);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof Prop)) {
+            return false;
+        }
+        final Prop other = (Prop) obj;
+        return Objects.equals(properties, other.getProperties());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ properties = %s }",
+                             super.toString(),
+                             Objects.toString(properties));
+    }
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/PropFind.java

@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+import static javax.xml.bind.annotation.XmlAccessType.*;
+
+/**
+ * WebDAV propfind XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_propfind">Chapter
+ * 14.20 "propfind XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlAccessorType(FIELD)
+@XmlType(propOrder = {"propName", "allProp", "include", "prop"})
+@XmlRootElement(name = "propfind")
+public final class PropFind {
+
+    @XmlElement(name = "propname")
+    private final PropName propName;
+
+    @XmlElement(name = "allprop")
+    private final AllProp allProp;
+
+    private final Include include;
+
+    private final Prop prop;
+
+    @SuppressWarnings("unused")
+    private PropFind() {
+        this(null, null, null, null);
+    }
+
+    private PropFind(final PropName propName, final AllProp allProp,
+                     final Include include, final Prop prop) {
+        this.propName = propName;
+        this.allProp = allProp;
+        this.include = include;
+        this.prop = prop;
+
+    }
+
+    public PropFind(final PropName propName) {
+        this(Objects.requireNonNull(propName), null, null, null);
+    }
+
+    public PropFind(final AllProp allProp, final Include include) {
+        this(null, Objects.requireNonNull(allProp), include, null);
+    }
+
+    public PropFind(final AllProp allProp) {
+        this(null, Objects.requireNonNull(allProp), null, null);
+    }
+
+    public PropFind(final Prop prop) {
+        this(null, null, null, Objects.requireNonNull(prop));
+    }
+
+    public final PropName getPropName() {
+        return this.propName;
+    }
+
+    public final AllProp getAllProp() {
+        return this.allProp;
+    }
+
+    public final Include getInclude() {
+        return this.include;
+    }
+
+    public final Prop getProp() {
+        return this.prop;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 31 * hash + Objects.hashCode(propName);
+        hash = 31 * hash + Objects.hashCode(allProp);
+        hash = 31 * hash + Objects.hashCode(include);
+        hash = 31 * hash + Objects.hashCode(prop);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof PropFind)) {
+            return false;
+        }
+        final PropFind other = (PropFind) obj;
+        if (!Objects.equals(propName, other.getPropName())) {
+            return false;
+        }
+        if (!Objects.equals(allProp, other.getAllProp())) {
+            return false;
+        }
+        if (!Objects.equals(include, other.getInclude())) {
+            return false;
+        }
+        return Objects.equals(prop, other.getProp());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ propName = %s,"
+                                 + "allProp = %s, "
+                                 + "include = %s, "
+                                 + "prop = %s }",
+                             super.toString(),
+                             Objects.toString(propName),
+                             Objects.toString(allProp),
+                             Objects.toString(include),
+                             Objects.toString(prop));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/PropName.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ * WebDAV propname XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * This is a singleton. All instances are absolutely identical, hence can be
+ * compared using {@code ==} and share one unique hash code. Use
+ * {@link #PROPNAME} always.
+ *
+ * @author Markus KARG (mkarg@java.net) * @author
+ * <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_propname">Chapter
+ * 14.21 "propname XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlRootElement(name = "propname")
+@XmlType(factoryMethod = "createSingleton")
+public final class PropName {
+
+    /**
+     * Singleton instance, providing improved performance and the ability to
+     * compare by <em>same</em> instance.
+     *
+     * @since 1.2
+     */
+    public static final PropName PROPNAME = new PropName();
+
+    /**
+     * Singleton factory to be used solely by JAXB.
+     */
+    @SuppressWarnings("unused")
+    private static PropName createSingleton() {
+        return PROPNAME;
+    }
+
+    private PropName() {
+        // For unmarshalling only.
+    }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName();
+    }
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/PropStat.java

@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ *
+ * WebDAV propstat XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_propstat">Chapter
+ * 14.22 "propstat XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlType(propOrder = {"prop", "status", "error", "responseDescription"})
+@XmlRootElement(name = "propstat")
+public final class PropStat {
+
+    @XmlElement
+    private final Prop prop;
+
+    @XmlElement
+    private final Status status;
+
+    @XmlElement
+    private final Error error;
+
+    @XmlElement(name = "responsedescription")
+    private final ResponseDescription responseDescription;
+
+    @SuppressWarnings("unused")
+    private PropStat() {
+        this.prop = null;
+        this.status = null;
+        this.error = null;
+        this.responseDescription = null;
+    }
+
+    public PropStat(final Prop prop,
+                    final Status status,
+                    final Error error,
+                    final ResponseDescription responseDescription) {
+
+        this.prop = Objects.requireNonNull(prop);
+        this.status = Objects.requireNonNull(status);
+        this.error = error;
+        this.responseDescription = responseDescription;
+    }
+
+    public PropStat(final Prop prop, final Status status) {
+        this(prop, status, null, null);
+    }
+
+    public PropStat(final Prop prop, final Status status, final Error error) {
+        this(prop, status, error, null);
+    }
+
+    public PropStat(final Prop prop,
+                    final Status status,
+                    final ResponseDescription responseDescription) {
+
+        this(prop, status, null, responseDescription);
+    }
+
+    public final Prop getProp() {
+        return this.prop;
+    }
+
+    public final Status getStatus() {
+        return this.status;
+    }
+
+    public final Error getError() {
+        return this.error;
+    }
+
+    public final ResponseDescription getResponseDescription() {
+        return this.responseDescription;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 29 * hash + Objects.hashCode(prop);
+        hash = 29 * hash + Objects.hashCode(status);
+        hash = 29 * hash + Objects.hashCode(error);
+        hash = 29 * hash + Objects.hashCode(responseDescription);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof PropStat)) {
+            return false;
+        }
+        final PropStat other = (PropStat) obj;
+        if (!Objects.equals(prop, other.getProp())) {
+            return false;
+        }
+        if (!Objects.equals(status, other.getStatus())) {
+            return false;
+        }
+        if (!Objects.equals(error, other.getError())) {
+            return false;
+        }
+        return Objects.equals(responseDescription,
+                              other.getResponseDescription());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ prop = %s,"
+                                 + "status = %s, "
+                                 + "error = %s, "
+                                 + "responseDescription %s }",
+                             super.toString(),
+                             Objects.toString(prop),
+                             Objects.toString(status),
+                             Objects.toString(error),
+                             Objects.toString(responseDescription));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/PropertyUpdate.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlElements;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ *
+ * WebDAV propertyupdate XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_propertyupdate">Chapter
+ * 14.19 "propertyupdate XML Element" of RFC 4918 "HTTP Extensions for Web
+ * Distributed Authoring and Versioning (WebDAV)"</a>
+ *
+ *
+ */
+@XmlRootElement(name = "propertyupdate")
+public final class PropertyUpdate {
+
+    @XmlElements({
+        @XmlElement(name = "remove", type = Remove.class)
+        , @XmlElement(name = "set", type = Set.class)})
+    private final List<RemoveOrSet> removesOrSets;
+
+    @SuppressWarnings("unused")
+    private PropertyUpdate() {
+        removesOrSets = new LinkedList<>();
+    }
+
+    public PropertyUpdate(final RemoveOrSet removeOrSet,
+                          final RemoveOrSet... removesOrSets) {
+
+        Objects.requireNonNull(removeOrSet);
+        this.removesOrSets = createList(removeOrSet, removesOrSets);
+    }
+
+    private static <T> List<T> createList(T first, T[] other) {
+
+        final List<T> list = new LinkedList<>();
+        list.add(first);
+        Collections.addAll(list, other);
+
+        return list;
+    }
+
+    public List<RemoveOrSet> list() {
+        return Collections.unmodifiableList(removesOrSets);
+    }
+    
+    public List<RemoveOrSet> getRemoveOrSets() {
+        return list();
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 79 * hash + Objects.hashCode(removesOrSets);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof PropertyUpdate)) {
+            return false;
+        }
+        final PropertyUpdate other = (PropertyUpdate) obj;
+        return Objects.equals(removesOrSets, other.getRemoveOrSets());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{ removeOrSets = %s }",
+                             super.toString(),
+                             Objects.toString(removesOrSets));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Remove.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ *
+ * WebDAV remove XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_remove">Chapter
+ * 14.23 "remove XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ *
+ */
+@XmlRootElement
+public final class Remove extends RemoveOrSet {
+
+    @SuppressWarnings("unused")
+    private Remove() {
+        // For unmarshalling only.
+    }
+
+    public Remove(final Prop prop) {
+        super(prop);
+    }
+
+    @Override
+    public boolean canEqual(final Object obj) {
+        return obj instanceof Remove;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/RemoveOrSet.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlElement;
+
+/**
+ *
+ * Internal superclass of set and remove WebDAV elements.
+ *
+ * This class shall not be used directly, but instead <code>Set</code> and
+ * <code>Remove</code> classes should be used.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @see Set
+ * @see Remove
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ */
+public abstract class RemoveOrSet {
+
+    @XmlElement
+    private final Prop prop;
+
+    public final Prop getProp() {
+        return this.prop;
+    }
+
+    protected RemoveOrSet() {
+        this.prop = null;
+    }
+
+    public RemoveOrSet(final Prop prop) {
+        this.prop = Objects.requireNonNull(prop);
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 67 * hash + Objects.hashCode(prop);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof RemoveOrSet)) {
+            return false;
+        }
+        final RemoveOrSet other = (RemoveOrSet) obj;
+        if (!other.canEqual(this)) {
+            return false;
+        }
+        return Objects.equals(prop, other.getProp());
+    }
+    
+    public boolean canEqual(final Object obj) {
+        return obj instanceof RemoveOrSet;
+    }
+    
+    public String toString(final String data) {
+        return String.format("%s{ prop = %s%s }",
+                             super.toString(),
+                             Objects.toString(prop),
+                             data);
+    }
+    
+    @Override
+    public final String toString() {
+        return toString("");
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Response.java

@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+import static java.util.Collections.*;
+import static javax.xml.bind.annotation.XmlAccessType.*;
+
+/**
+ *
+ * WebDAV response XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_response">Chapter
+ * 14.24 "response XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlAccessorType(FIELD)
+@XmlType(propOrder = {"hRefs", "status", "propStats", "error",
+                      "responseDescription", "location"})
+@XmlRootElement
+public final class Response {
+
+    @XmlElement(name = "href")
+    private final List<HRef> hRefs;
+
+    private final Status status;
+
+    @XmlElement(name = "propstat")
+    private final List<PropStat> propStats;
+
+    private final Error error;
+
+    @XmlElement(name = "responsedescription")
+    private ResponseDescription responseDescription;
+
+    private Location location;
+
+    @SuppressWarnings("unused")
+    private Response() {
+        this(new LinkedList<HRef>(),
+             null,
+             new LinkedList<PropStat>(),
+             null,
+             null,
+             null);
+    }
+
+    private Response(final List<HRef> hRefs,
+                     final Status status,
+                     final List<PropStat> propStats,
+                     final Error error,
+                     final ResponseDescription responseDescription,
+                     final Location location) {
+        this.hRefs = hRefs;
+        this.status = status;
+        this.propStats = propStats;
+        this.error = error;
+        this.responseDescription = responseDescription;
+        this.location = location;
+    }
+
+    public Response(final HRef hRef,
+                    final Error error,
+                    final ResponseDescription responseDescription,
+                    final Location location,
+                    final PropStat propStat,
+                    final PropStat... propStats) {
+
+        this(Collections.singletonList(hRef),
+             null,
+             createList(propStat, propStats),
+             error,
+             responseDescription, location);
+    }
+
+    public Response(final Status status,
+                    final Error error,
+                    final ResponseDescription responseDescription,
+                    final Location location,
+                    final HRef hRef,
+                    final HRef... hRefs) {
+
+        this(createList(hRef, hRefs),
+             Objects.requireNonNull(status),
+             Collections.<PropStat>emptyList(),
+             error,
+             responseDescription,
+             location);
+    }
+    
+    private static <T> List<T> createList(T first, T[] other) {
+        
+        final List<T> list = new LinkedList<>();
+        list.add(first);
+        Collections.addAll(list, other);
+        
+        return list;
+    }
+
+    public final List<HRef> getHRefs() {
+        return unmodifiableList(this.hRefs);
+    }
+
+    public final Status getStatus() {
+        return this.status;
+    }
+
+    public final Error getError() {
+        return this.error;
+    }
+
+    public final ResponseDescription getResponseDescription() {
+        return this.responseDescription;
+    }
+
+    public final Location getLocation() {
+        return this.location;
+    }
+
+    public final List<PropStat> getPropStats() {
+        return unmodifiableList(this.propStats);
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 31 * hash + Objects.hashCode(hRefs);
+        hash = 31 * hash + Objects.hashCode(status);
+        hash = 31 * hash + Objects.hashCode(propStats);
+        hash = 31 * hash + Objects.hashCode(error);
+        hash = 31 * hash + Objects.hashCode(responseDescription);
+        hash = 31 * hash + Objects.hashCode(location);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof Response)) {
+            return false;
+        }
+        final Response other = (Response) obj;
+        if (!Objects.equals(hRefs, other.getHRefs())) {
+            return false;
+        }
+        if (!Objects.equals(status, other.getStatus())) {
+            return false;
+        }
+        if (!Objects.equals(propStats, other.getPropStats())) {
+            return false;
+        }
+        if (!Objects.equals(error, other.getError())) {
+            return false;
+        }
+        if (!Objects.equals(responseDescription,
+                            other.getResponseDescription())) {
+            return false;
+        }
+        return Objects.equals(location, other.getLocation());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ hRefs = %s, "
+                                 + "status = %s, "
+                                 + "propStats = %s,"
+                                 + "error = %s,"
+                                 + "responseDescription = %s }",
+                             super.toString(),
+                             Objects.toString(hRefs),
+                             Objects.toString(status),
+                             Objects.toString(propStats),
+                             Objects.toString(error),
+                             Objects.toString(responseDescription));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/ResponseDescription.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlValue;
+
+import static javax.xml.bind.annotation.XmlAccessType.*;
+
+/**
+ *
+ * WebDAV responsedescription XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_responsedescription">Chapter
+ * 14.25 "responsedescription XML Element" of RFC 4918 "HTTP Extensions for Web
+ * Distributed Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlAccessorType(NONE)
+@XmlRootElement(name = "responsedescription")
+public final class ResponseDescription {
+
+    @XmlValue
+    private String content;
+
+    @SuppressWarnings("unused")
+    private ResponseDescription() {
+        // For unmarshalling only.
+    }
+
+    public ResponseDescription(final String content) {
+        this.content = content;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 67 * hash + Objects.hashCode(content);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof ResponseDescription)) {
+            return false;
+        }
+        final ResponseDescription other = (ResponseDescription) obj;
+        return Objects.equals(content, other.getContent());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ content = \"%s\" }",
+                             super.toString(),
+                             content);
+    }
+    
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Rfc1123DateFormat.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Locale;
+import java.util.TimeZone;
+
+/**
+ * RFC 1123 date format
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * This class formats and parses dates using the RFC 1123 compliant pattern
+ * [WDY], [DY] [MTH] [YEAR] [hh]:[mm]:[ss] GMT.
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public final class Rfc1123DateFormat extends SimpleDateFormat {
+
+    private static final long serialVersionUID = 7064959972169916377L;
+
+    
+    
+    public Rfc1123DateFormat() {
+        super("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US);
+        this.calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Rfc3339DateTimeFormat.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.Locale;
+import java.util.TimeZone;
+
+/**
+ * /**
+ * RFC 3339 date-time format
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * This class formats and parses dates using the ISO 8601 compliant pattern
+ * [YYYY]-[MM]-[DD]T[hh]:[mm]:[ss].([fff])[OFS]. Parsing and formatting are
+ * handled in different ways to provide at-most stability and compatibility.
+ * While formatting always will produce a String in full UTC notation
+ * (containing time offset literal 'Z' and fraction of seconds), parsing is
+ * flexible and can handle not only optional fraction of seconds, but also
+ * numeric time offsets in addition to the time offset literal 'Z'.
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ */
+public final class Rfc3339DateTimeFormat extends SimpleDateFormat {
+
+    private static final long serialVersionUID = 5892844197992067945L;
+
+    private static final String DEFAULT_PATTERN = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";
+
+    public Rfc3339DateTimeFormat() {
+        super(DEFAULT_PATTERN, Locale.US);
+        this.calendar = Calendar
+            .getInstance(TimeZone.getTimeZone("UTC"));
+    }
+
+    @Override
+    public final Date parse(final String text) throws ParseException {
+        final String patchedText = this.ignoreTimeOffsetColon(text);
+
+        final String pattern = this.buildPatternVariant(patchedText);
+
+        if (!pattern.equals(DEFAULT_PATTERN)) {
+            this.applyPattern(pattern);
+        }
+
+        return super.parse(patchedText);
+    }
+
+    private String buildPatternVariant(final String text) {
+
+        final StringBuilder pattern = new StringBuilder("yyyy-MM-dd'T'HH:mm:ss");
+        this.addFractionToPattern(pattern, text);
+        this.addTimeOffsetToPattern(pattern, text);
+        return pattern.toString();
+    }
+
+    private void addFractionToPattern(final StringBuilder pattern,
+                                      final String text) {
+
+        if (text.lastIndexOf('.') != -1) {
+            pattern.append(".SSS");
+        }
+    }
+
+    private void addTimeOffsetToPattern(final StringBuilder pattern,
+                                        final String text) {
+
+        final boolean appendAsLiteral = text.charAt(text.length() - 1) == 'Z';
+
+        if (appendAsLiteral) {
+            pattern.append('\'');
+        }
+
+        pattern.append('Z');
+
+        if (appendAsLiteral) {
+            pattern.append('\'');
+        }
+    }
+
+    private String ignoreTimeOffsetColon(final String text)
+        throws ParseException {
+        
+        if (text == null || text.isEmpty()) {
+            throw new ParseException("Cannot parse empty text", 0);
+        }
+
+        if (text.charAt(text.length() - 1) == 'Z') {
+            return text;
+        }
+
+        if (text.charAt(text.length() - 3) != ':') {
+            throw new ParseException(
+                "According to RFC 3339 time offset must contain colon separator.",
+                text.length() - 2);
+        }
+
+        return new StringBuilder(text).deleteCharAt(text.length() - 3)
+            .toString();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Set.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ *
+ * WebDAV set XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_set">Chapter
+ * 14.26 "set XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlRootElement
+public final class Set extends RemoveOrSet {
+
+    @SuppressWarnings("unused")
+    private Set() {
+        // For unmarshalling only.
+    }
+
+    public Set(final Prop prop) {
+        super(prop);
+    }
+
+    @Override
+    public boolean canEqual(final Object obj) {
+        return obj instanceof Set;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Shared.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ *
+ * WebDAV shared XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * This is a singleton. All instances are absolutely identical, hence can be
+ * compared using {@code ==} and share one unique hash code. Use {@link #SHARED}
+ * always.
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_shared">Chapter
+ * 14.27 "shared XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlRootElement
+@XmlType(factoryMethod = "createSingleton")
+public final class Shared {
+
+    /**
+     * Singleton instance, providing improved performance and the ability to
+     * compare by <em>same</em> instance.
+     *
+     * @since 1.2
+     */
+    public static final Shared SHARED = new Shared();
+
+    private static Shared createSingleton() {
+        return SHARED;
+    }
+
+    private Shared() {
+        // For unmarshalling only.
+    }
+
+    @Override
+    public final String toString() {
+        return getClass().getSimpleName();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Status.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import java.util.Objects;
+
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlValue;
+
+import javax.ws.rs.core.Response;
+
+import static javax.xml.bind.annotation.XmlAccessType.*;
+
+/**
+ *
+ * WebDAV status XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_status">Chapter
+ * 14.28 "status XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlAccessorType(NONE)
+@XmlRootElement
+public final class Status {
+
+    @XmlValue
+    private String statusLine;
+
+    @SuppressWarnings("unused")
+    private Status() {
+        // For unmarshalling only.
+    }
+
+    private Status(final int statusCode, final String reasonPhrase) {
+        this.statusLine = String.format("HTTP/1.1 %d %s",
+                                        statusCode,
+                                        reasonPhrase);
+    }
+
+    public Status(final Response.StatusType responseStatus) {
+        this(responseStatus.getStatusCode(), responseStatus.getReasonPhrase());
+    }
+
+    public final String getStatus() {
+        return statusLine;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 89 * hash + Objects.hashCode(statusLine);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof Status)) {
+            return false;
+        }
+        final Status other = (Status) obj;
+        return Objects.equals(statusLine, other.getStatus());
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s{ statusLine = \"%s\" }",
+                             super.toString(),
+                             statusLine);
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/TimeOut.java

@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import org.libreccm.webdav.ConstantsAdapter;
+import org.libreccm.webdav.Headers;
+
+import java.util.Collection;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlValue;
+import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
+
+import static java.lang.Long.*;
+import static java.util.Collections.*;
+
+/**
+ *
+ * WebDAV timeout XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see
+ * <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_timeout">Chapter
+ * 14.29 "timeout XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ */
+@XmlAccessorType(XmlAccessType.NONE)
+@XmlRootElement(name = "timeout")
+@XmlJavaTypeAdapter(TimeOut.Adapter.class)
+public final class TimeOut {
+
+    private static final long INFINITE_VALUE = Long.MAX_VALUE;
+
+    private static final String INFINITE_TOKEN = Headers.TIMEOUT_INFINITE;
+
+    private static final String SECOND_TOKEN = Headers.TIMEOUT_SECOND + "%d";
+
+    public static final TimeOut INFINITE = new TimeOut();
+
+    /**
+     * The number of seconds, or {@link #INFINITE_VALUE} for infinite timeout.
+     */
+    private long timeType;
+
+    private TimeOut() {
+        this(INFINITE_VALUE);
+    }
+
+    public TimeOut(final long seconds) {
+        this.timeType = seconds;
+    }
+
+    @XmlValue
+    private String getTimeType() {
+
+        if (timeType == INFINITE_VALUE) {
+            return INFINITE_TOKEN;
+        } else {
+            return String.format(SECOND_TOKEN, timeType);
+        }
+    }
+
+    private void setTimeType(final String timeType) {
+
+        if (isInfinite(timeType)) {
+            this.timeType = INFINITE_VALUE;
+        } else {
+            this.timeType = parseSecond(timeType);
+        }
+    }
+
+    private static boolean isInfinite(final String timeType) {
+        return INFINITE_TOKEN.equals(timeType);
+    }
+
+    private static long parseSecond(final String timeType) {
+        return parseLong(timeType.substring(timeType.lastIndexOf('-') + 1));
+    }
+
+    public final boolean isInfinite() {
+        return this.timeType == INFINITE_VALUE;
+    }
+
+    /**
+     * @return The duration of the timeout in seconds, or {@link Long#MAX_VALUE}
+     *         for infinity. Note that future versions will return null for
+     *         infinity.
+     */
+    public final long getSeconds() {
+        return this.timeType;
+    }
+
+    /**
+     * Factory method creating {@link TimeOut} instances from {@code String}
+     * value representations (e. g. as used in HTTP {@link Headers#TIMEOUT}
+     * header). Guarantees that {@link #INFINITE} singleton is returned for
+     * {@code "Infinite"} string, hence allowing to compare for infinity using
+     * {@code ==} comparison.
+     * 
+     * Example:
+     * 
+     * <pre>
+     * TimeOut to = TimeOut.valueOf("Infinite");
+     * if (to == Timeout.INFINITE) { ... }
+     * </pre>
+     *
+     * @param timeType Either {@code Second-n} (where {@code n} is the length of
+     *                 the timeout) or {@code Infinite}.
+     *
+     * @return An instance of {@link TimeOut} with the length taken from the
+     *         {@code timeOutHeader} string. Instance is guaranteed to be
+     *         {@link #INFINITE} in case {@code timeOutHeader} is
+     *         {@code "Infinity"}.
+     *
+     * @since 1.2.1
+     */
+    public static final TimeOut valueOf(final String timeType) {
+        
+        if (isInfinite(timeType)) {
+            return INFINITE;
+        } else {
+            return new TimeOut(parseSecond(timeType));
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 5;
+        hash = 53 * hash + (int) (timeType ^ (timeType >>> 32));
+        return hash;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof TimeOut)) {
+            return false;
+        }
+        final TimeOut other = (TimeOut) obj;
+        return timeType == Long.parseLong(other.getTimeType());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("%s{ %s }",
+                             super.toString(),
+                             Long.toString(timeType));
+    }
+
+    /**
+     * Guarantees that any unmarshalled enum constants effectively are the
+     * constant Java instances itself, so that {@code ==} can be used form
+     * comparison.
+     *
+     * @since 1.2
+     */
+    protected static final class Adapter extends ConstantsAdapter<TimeOut> {
+
+        @Override
+        protected final Collection<TimeOut> getConstants() {
+            return singleton(INFINITE);
+        }
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/Write.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlType;
+
+/**
+ *
+ * WebDAV write XML Element.
+ *
+ * The class is based on a class/interface from java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * <p>
+ * This is a singleton. All instances are absolutely identical, hence can be
+ * compared using {@code ==} and share one unique hash code. Use {@link #WRITE}
+ * always.
+ * </p>
+ *
+ * @author Markus KARG (mkarg@java.net)
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ *
+ * @see <a href="http://www.webdav.org/specs/rfc4918.html#ELEMENT_write">Chapter
+ * 14.30 "write XML Element" of RFC 4918 "HTTP Extensions for Web Distributed
+ * Authoring and Versioning (WebDAV)"</a>
+ *
+ *
+ */
+@XmlRootElement
+@XmlType(factoryMethod = "createSingleton")
+public final class Write {
+
+    /**
+     * Singleton instance, providing improved performance and the ability to
+     * compare by <em>same</em> instance.
+     *
+     */
+    public static final Write WRITE = new Write();
+
+    private static  Write createSingleton() {
+        return WRITE;
+    }
+
+    private Write() {
+        // For unmarshalling only.
+    }
+    
+    @Override
+    public String toString() {
+        return getClass().getSimpleName();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/elements/package-info.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2018 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+/**
+ * This package contains WebDAV XML Elements.
+ *
+ * The classes in this package are based on the classes from the 
+ * java.net WebDAV Project:
+ *
+ * <a href="https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java">https://gitlab.com/headcrashing/webdav-jaxrs/blob/master/src/main/java/net/java/dev/webdav/jaxrs/Headers.java</a>
+ *
+ * @author <a href="mailto:mkarg@java.net">Markus Karg</a>
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ * 
+ * @see <a href="http://www.webdav.org/specs/rfc4918.html#xml.element.definitions">Chapter 14 "XML Element Definitions" of RFC 4918 "HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV)"</a>
+ *
+ */
+@XmlSchema(namespace = "DAV:", 
+           xmlns = @XmlNs(prefix = "D", namespaceURI = "DAV:"), 
+           elementFormDefault = QUALIFIED)
+package org.libreccm.webdav.xml.elements;
+
+import javax.xml.bind.annotation.XmlNs;
+import javax.xml.bind.annotation.XmlSchema;
+
+import static javax.xml.bind.annotation.XmlNsForm.*;
+