CCM NG: Package structure cleanup, some more classes for implementing WebDAV resources

git-svn-id: https://svn.libreccm.org/ccm/ccm_ng@5425 8810af33-2d31-482b-a856-94f89814c4df

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

@@ -0,0 +1,133 @@
+/*
+ * 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;
+
+import org.libreccm.core.UnexpectedErrorException;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.ext.ContextResolver;
+import javax.ws.rs.ext.Provider;
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+import javax.xml.bind.JAXBIntrospector;
+
+/**
+ * Provides support for custom extensions to WebDAV, like custom Properties and
+ * XML Elements.<br>
+ *
+ * WebDAV allows custom extensions for XML Elements and Properties. To enable
+ * JAX-RS to deal with these, each of them must be implemented as a JAXB class
+ * and registered by passing it to the constructor of this resolver.
+ *
+ * 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#xml-extensibility">Chapter
+ * 17 "XML Extensibility in DAV" of RFC 2616 "Hypertext Transfer Protocol --
+ * HTTP/1.1"</a>
+ */
+@Provider
+@Produces(MediaType.APPLICATION_XML)
+public class WebDavContextResolver implements ContextResolver<JAXBContext> {
+
+    private final JAXBContext context;
+
+    private final JAXBIntrospector introspector;
+
+    /**
+     * Creates an instance of this resolver, registering the provided custom XML
+     * Elements and Properties.
+     *
+     * @param additionalClasses The custom extensions (JAXB classes) to be
+     *                          registered (can be left blank).
+     *
+     * @throws JAXBException if an error was encountered while creating the
+     *                       JAXBContext, such as (but not limited to): No JAXB
+     *                       implementation was discovered, Classes use JAXB
+     *                       annotations incorrectly, Classes have colliding
+     *                       annotations (i.e., two classes with the same type
+     *                       name), The JAXB implementation was unable to locate
+     *                       provider-specific out-of-band information (such as
+     *                       additional files generated at the development
+     *                       time.)
+     */
+    public WebDavContextResolver(final Class<?>... additionalClasses)
+        throws JAXBException {
+
+        this.context = WebDavJAXBContextBuilder.build(additionalClasses);
+        this.introspector = this.context.createJAXBIntrospector();
+    }
+
+    /**
+     * @return A single, shared context for both, WebDAV XML Elements and
+     *         Properties and custom extensions.
+     */
+    @Override
+    public JAXBContext getContext(final Class<?> type) {
+
+        if (introspector.isElement(buildInstanceOf(type))) {
+            return context;
+        } else {
+            return null;
+        }
+    }
+
+    private <T> T buildInstanceOf(final Class<T> type) {
+
+        if (type == null) {
+
+            return null;
+
+        } else if (type.isEnum()) {
+
+            final T[] enumConstants = type.getEnumConstants();
+            if (enumConstants.length > 0) {
+                return enumConstants[0];
+            } else {
+                return null;
+            }
+
+        } else {
+
+            try {
+                final Constructor<T> constructor = type
+                    .getDeclaredConstructor();
+                constructor.setAccessible(true);
+                return constructor.newInstance();
+            } catch (NoSuchMethodException
+                     | InstantiationException
+                     | IllegalAccessException
+                     | InvocationTargetException ex) {
+
+                throw new UnexpectedErrorException(ex);
+            }
+        }
+    }
+
+}

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

@@ -0,0 +1,165 @@
+/*
+ * 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;
+
+import org.libreccm.webdav.conditions.CannotModifyProtectedProperty;
+import org.libreccm.webdav.conditions.LockTokenMatchesRequestUri;
+import org.libreccm.webdav.conditions.LockTokenSubmitted;
+import org.libreccm.webdav.conditions.NoConflictingLock;
+import org.libreccm.webdav.conditions.NoExternalEntities;
+import org.libreccm.webdav.conditions.PreservedLiveProperties;
+import org.libreccm.webdav.conditions.PropFindFiniteDepth;
+import org.libreccm.webdav.xml.elements.ActiveLock;
+import org.libreccm.webdav.xml.elements.AllProp;
+import org.libreccm.webdav.xml.elements.Collection;
+import org.libreccm.webdav.xml.elements.Depth;
+import org.libreccm.webdav.xml.elements.Exclusive;
+import org.libreccm.webdav.xml.elements.HRef;
+import org.libreccm.webdav.xml.elements.Include;
+import org.libreccm.webdav.xml.elements.Location;
+import org.libreccm.webdav.xml.elements.LockEntry;
+import org.libreccm.webdav.xml.elements.LockInfo;
+import org.libreccm.webdav.xml.elements.LockRoot;
+import org.libreccm.webdav.xml.elements.LockScope;
+import org.libreccm.webdav.xml.elements.LockToken;
+import org.libreccm.webdav.xml.elements.LockType;
+import org.libreccm.webdav.xml.elements.MultiStatus;
+import org.libreccm.webdav.xml.elements.Owner;
+import org.libreccm.webdav.xml.elements.Prop;
+import org.libreccm.webdav.xml.elements.PropFind;
+import org.libreccm.webdav.xml.elements.PropName;
+import org.libreccm.webdav.xml.elements.PropStat;
+import org.libreccm.webdav.xml.elements.PropertyUpdate;
+import org.libreccm.webdav.xml.elements.Remove;
+import org.libreccm.webdav.xml.elements.ResponseDescription;
+import org.libreccm.webdav.xml.elements.Shared;
+import org.libreccm.webdav.xml.elements.Status;
+import org.libreccm.webdav.xml.elements.TimeOut;
+import org.libreccm.webdav.xml.elements.Write;
+import org.libreccm.webdav.xml.properties.CreationDate;
+import org.libreccm.webdav.xml.properties.DisplayName;
+import org.libreccm.webdav.xml.properties.GetContentLanguage;
+import org.libreccm.webdav.xml.properties.GetContentLength;
+import org.libreccm.webdav.xml.properties.GetContentType;
+import org.libreccm.webdav.xml.properties.GetETag;
+import org.libreccm.webdav.xml.properties.GetLastModified;
+import org.libreccm.webdav.xml.properties.LockDiscovery;
+import org.libreccm.webdav.xml.properties.ResourceType;
+import org.libreccm.webdav.xml.properties.SupportedLock;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
+
+import javax.swing.text.Utilities;
+import javax.ws.rs.core.Response;
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+
+/**
+ * Provides support for custom extensions to WebDAV, like custom Properties and
+ * XML Elements.<br>
+ *
+ * WebDAV allows custom extensions for XML Elements and Properties. To enable
+ * JAX-RS to deal with these, each of them must be implemented as a JAXB class
+ * and registered by passing it to the constructor of this factory.
+ *
+ * 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#xml-extensibility">Chapter
+ * 17 "XML Extensibility in DAV" of RFC 2616 "Hypertext Transfer Protocol --
+ * HTTP/1.1"</a>
+ */
+final class WebDavJAXBContextBuilder {
+
+    /**
+     * Builds a JAXB context for WebDAV.
+     *
+     * @param auxiliaryClasses Optional set of custom XML elements which shall
+     *                         get part of the context.
+     *
+     * @throws JAXBException If JAXB cannot create the context.
+     */
+    public static final JAXBContext build(final Class<?>... auxiliaryClasses) 
+        throws JAXBException {
+        
+        final Class<?>[] webDavClasses = new Class<?>[]{
+            ActiveLock.class,
+            AllProp.class,
+            CannotModifyProtectedProperty.class,
+            Collection.class,
+            CreationDate.class,
+            Depth.class,
+            DisplayName.class,
+            Error.class,
+            Exclusive.class,
+            GetContentLanguage.class,
+            GetContentLength.class,
+            GetContentType.class,
+            GetETag.class,
+            GetLastModified.class,
+            HRef.class,
+            Include.class,
+            Location.class,
+            LockDiscovery.class,
+            LockEntry.class,
+            LockInfo.class,
+            LockRoot.class,
+            LockScope.class,
+            LockToken.class,
+            LockTokenMatchesRequestUri.class,
+            LockTokenSubmitted.class,
+            LockType.class,
+            MultiStatus.class,
+            NoConflictingLock.class,
+            NoExternalEntities.class,
+            Owner.class,
+            PreservedLiveProperties.class,
+            Prop.class,
+            PropertyUpdate.class,
+            PropFind.class,
+            PropFindFiniteDepth.class,
+            PropName.class,
+            PropStat.class,
+            Remove.class,
+            ResourceType.class,
+            Response.class,
+            ResponseDescription.class,
+            Set.class, Shared.class,
+            Status.class,
+            SupportedLock.class,
+            TimeOut.class,
+            Write.class};
+        
+        final List<Class<?>> allClasses = new ArrayList<>();
+        allClasses.addAll(Arrays.asList(webDavClasses));
+        allClasses.addAll(Arrays.asList(auxiliaryClasses));
+        
+        
+        return JAXBContext.newInstance(allClasses.toArray(new Class<?>[]{}));
+    }
+
+}

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/CreationDate.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 import org.libreccm.webdav.xml.elements.Rfc3339DateTimeFormat;

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/DisplayName.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/GetContentLanguage.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/GetContentLength.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/GetContentType.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/GetETag.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/GetLastModified.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 import org.libreccm.webdav.xml.elements.Rfc1123DateFormat;

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/LockDiscovery.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 import org.libreccm.webdav.xml.elements.ActiveLock;

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/ResourceType.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 import org.libreccm.webdav.xml.elements.Collection;

ccm-core/src/main/java/org/libreccm/webdav/xml/properties/SupportedLock.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import org.libreccm.webdav.ConstantsAdapter;
 import org.libreccm.webdav.xml.elements.LockEntry;

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

@@ -35,7 +35,7 @@
 @XmlSchema(namespace = "DAV:",
            xmlns = @XmlNs(prefix = "D", namespaceURI = "DAV:"),
            elementFormDefault = QUALIFIED)
-package org.libreccm.webdav.xml.elements.properties;
+package org.libreccm.webdav.xml.properties;
 
 import static javax.xml.bind.annotation.XmlNsForm.QUALIFIED;