Im/Exporters for assets

ccm-cms/src/main/java/org/librecms/assets/AbstractAssetImExporter.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.AbstractEntityImExporter;
+import org.librecms.contentsection.Asset;
+import org.librecms.contentsection.AssetRepository;
+
+import java.util.Objects;
+
+import javax.inject.Inject;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ * @param <T> Type of asset to process.
+ */
+public abstract class AbstractAssetImExporter<T extends Asset>
+    extends AbstractEntityImExporter<T> {
+
+    @Inject
+    private AssetRepository assetRepo;
+
+    @Override
+    protected void saveImportedEntity(T asset) {
+        assetRepo.save(asset);
+    }
+
+    @Override
+    protected T reloadEntity(T asset) {
+        return assetRepo
+            .findById(Objects.requireNonNull(asset.getObjectId()),
+                      getEntityClass()
+            )
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "No asset of type %s with ID %d found in the database.",
+                        getEntityClass().getName(),
+                        asset.getObjectId()
+                    )
+                )
+            );
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/AbstractBinaryAssetImExporter.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ * @param <T> Type of {@link BinaryAsset> to process
+ */
+public abstract class AbstractBinaryAssetImExporter<T extends BinaryAsset>
+    extends AbstractAssetImExporter<T> {
+
+}

ccm-cms/src/main/java/org/librecms/assets/AbstractBookmarkImExporter.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ * @param <T> Type of {@link Bookmark} to process.
+ */
+public abstract class AbstractBookmarkImExporter<T extends Bookmark>
+    extends AbstractAssetImExporter<T> {
+
+}

ccm-cms/src/main/java/org/librecms/assets/AbstractContactableEntityImExporter.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import java.util.Set;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public abstract class AbstractContactableEntityImExporter<T extends ContactableEntity>
+    extends AbstractAssetImExporter<T> {
+
+    @Override
+    protected final void init() {
+        addRequiredEntities(Set.of(PostalAddress.class));
+    }
+    
+    protected abstract void initContactableEntityImExporter();
+    
+}

ccm-cms/src/main/java/org/librecms/assets/AudioAsset.java

@@ -19,6 +19,7 @@
 package org.librecms.assets;
 
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.ui.contentsections.assets.AudioAssetCreateStep;
 import org.librecms.ui.contentsections.assets.AudioAssetEditStep;
@@ -59,6 +60,7 @@ public class AudioAsset extends BinaryAsset implements Serializable {
 
     @OneToOne
     @JoinColumn(name = "LEGAL_METADATA_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private LegalMetadata legalMetadata;
 
     public LegalMetadata getLegalMetadata() {

ccm-cms/src/main/java/org/librecms/assets/AudioAssetImExporter.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(AudioAsset.class)
+public class AudioAssetImExporter extends AbstractBinaryAssetImExporter<AudioAsset> {
+
+    @Override
+    public Class<AudioAsset> getEntityClass() {
+        return AudioAsset.class;
+    }
+
+    @Override
+    protected void init() {
+        addRequiredEntities(Set.of(LegalMetadata.class));
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/BookmarkImExporter.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Bookmark.class)
+public class BookmarkImExporter
+    extends AbstractBookmarkImExporter<Bookmark> {
+
+    @Override
+    public Class<Bookmark> getEntityClass() {
+        return Bookmark.class;
+    }
+
+    @Override
+    protected void init() {
+        // Nothing
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/ExternalAudioAsset.java

@@ -19,6 +19,7 @@
 package org.librecms.assets;
 
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.ui.contentsections.assets.ExternalAudioAssetCreateStep;
 import org.librecms.ui.contentsections.assets.ExternalAudioAssetEditStep;
@@ -62,6 +63,7 @@ public class ExternalAudioAsset extends Bookmark implements Serializable {
 
     @OneToOne
     @JoinColumn(name = "LEGAL_METADATA_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private LegalMetadata legalMetadata;
 
     public LegalMetadata getLegalMetadata() {

ccm-cms/src/main/java/org/librecms/assets/ExternalAudioAssetImExporter.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(ExternalAudioAsset.class)
+public class ExternalAudioAssetImExporter
+    extends AbstractBookmarkImExporter<ExternalAudioAsset> {
+
+    @Override
+    public Class<ExternalAudioAsset> getEntityClass() {
+        return ExternalAudioAsset.class;
+    }
+
+    @Override
+    protected void init() {
+        addRequiredEntities(Set.of(LegalMetadata.class));
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/ExternalVideoAsset.java

@@ -19,6 +19,7 @@
 package org.librecms.assets;
 
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.ui.contentsections.assets.ExternalVideoAssetCreateStep;
 import org.librecms.ui.contentsections.assets.ExternalVideoAssetEditStep;
@@ -59,6 +60,7 @@ public class ExternalVideoAsset extends Bookmark implements Serializable {
 
     @OneToOne
     @JoinColumn(name = "LEGAL_METADATA_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private LegalMetadata legalMetadata;
 
     public LegalMetadata getLegalMetadata() {

ccm-cms/src/main/java/org/librecms/assets/ExternalVideoAssetImExporter.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(ExternalVideoAsset.class)
+public class ExternalVideoAssetImExporter
+    extends AbstractBookmarkImExporter<ExternalVideoAsset> {
+
+    @Override
+    public Class<ExternalVideoAsset> getEntityClass() {
+        return ExternalVideoAsset.class;
+    }
+
+    @Override
+    protected void init() {
+        addRequiredEntities(Set.of(LegalMetadata.class));
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/FileAssetImExporter.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class FileAssetImExporter
+    extends AbstractBinaryAssetImExporter<FileAsset> {
+
+    @Override
+    public Class<FileAsset> getEntityClass() {
+        return FileAsset.class;
+    }
+
+    @Override
+    protected void init() {
+        // Nothing
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/Image.java

@@ -18,6 +18,8 @@
  */
 package org.librecms.assets;
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
+
 import java.io.Serializable;
 import java.util.Objects;
 
@@ -67,6 +69,7 @@ public class Image extends BinaryAsset implements Serializable {
 
     @OneToOne
     @JoinColumn(name = "LEGAL_METADATA_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private LegalMetadata legalMetadata;
 
     public Image() {

ccm-cms/src/main/java/org/librecms/assets/ImageImExporter.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Image.class)
+public class ImageImExporter extends AbstractBinaryAssetImExporter<Image> {
+
+    @Override
+    public Class<Image> getEntityClass() {
+        return Image.class;
+    }
+
+    @Override
+    protected void init() {
+        addRequiredEntities(Set.of(LegalMetadata.class));
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/LegalMetadataImExporter.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(LegalMetadata.class)
+public class LegalMetadataImExporter
+    extends AbstractAssetImExporter<LegalMetadata> {
+
+    @Override
+    public Class<LegalMetadata> getEntityClass() {
+        return LegalMetadata.class;
+    }
+
+    @Override
+    protected void init() {
+        // Nothing
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/OrganizationImExporter.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Organization.class)
+public class OrganizationImExporter
+    extends AbstractContactableEntityImExporter<Organization> {
+
+    @Override
+    public Class<Organization> getEntityClass() {
+        return Organization.class;
+    }
+
+    @Override
+    protected void initContactableEntityImExporter() {
+        // Nothing
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/PersonImExporter.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class PersonImExporter
+    extends AbstractContactableEntityImExporter<Person> {
+
+    @Override
+    public Class<Person> getEntityClass() {
+        return Person.class;
+    }
+
+    @Override
+    protected void initContactableEntityImExporter() {
+        // Nothing
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/PostalAddressImExporter.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.librecms.contentsection.Asset;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class PostalAddressImExporter
+    extends AbstractAssetImExporter<PostalAddress> {
+
+    @Override
+    public Class<PostalAddress> getEntityClass() {
+        return PostalAddress.class;
+    }
+
+    @Override
+    protected void init() {
+        // Nothing
+    }
+
+}

ccm-cms/src/main/java/org/librecms/assets/RelatedLink.java

@@ -19,6 +19,8 @@
 package org.librecms.assets;
 
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import org.librecms.contentsection.Asset;
 import org.hibernate.envers.Audited;
 import org.librecms.contentsection.ContentItem;
@@ -56,10 +58,12 @@ public class RelatedLink extends Asset implements Serializable {
 
     @OneToOne
     @JoinColumn(name = "TARGET_ITEM")
+    @JsonIgnore
     private ContentItem targetItem;
 
     @OneToOne
     @JoinColumn(name = "BOOKMARK_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private Bookmark bookmark;
 
     public ContentItem getTargetItem() {

ccm-cms/src/main/java/org/librecms/assets/RelatedLinkImExporter.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(RelatedLink.class)
+public class RelatedLinkImExporter extends AbstractAssetImExporter<RelatedLink> {
+
+    @Override
+    public Class<RelatedLink> getEntityClass() {
+        return RelatedLink.class;
+    }
+
+    @Override
+    protected void init() {
+        addRequiredEntities(Set.of(Bookmark.class));
+    }
+    
+    
+    
+}

ccm-cms/src/main/java/org/librecms/assets/SideNoteImExporter.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(SideNote.class)
+public class SideNoteImExporter extends AbstractAssetImExporter<SideNote>{
+
+    @Override
+    public Class<SideNote> getEntityClass() {
+        return SideNote.class;
+    }
+
+    @Override
+    protected void init() {
+        // Nothing
+    }
+    
+    
+    
+}

ccm-cms/src/main/java/org/librecms/assets/VideoAsset.java

@@ -19,6 +19,7 @@
 package org.librecms.assets;
 
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.ui.contentsections.assets.MvcAssetEditKit;
 import org.librecms.ui.contentsections.assets.VideoAssetCreateStep;
@@ -66,6 +67,7 @@ public class VideoAsset extends BinaryAsset implements Serializable {
 
     @OneToOne
     @JoinColumn(name = "LEGAL_METADATA_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private LegalMetadata legalMetadata;
 
     public long getWidth() {

ccm-cms/src/main/java/org/librecms/assets/VideoAssetImExporter.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2022 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.librecms.assets;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(VideoAsset.class)
+public class VideoAssetImExporter
+    extends AbstractBinaryAssetImExporter<VideoAsset> {
+
+    @Override
+    public Class<VideoAsset> getEntityClass() {
+        return VideoAsset.class;
+    }
+
+    @Override
+    protected void init() {
+        addRequiredEntities(
+            Set.of(LegalMetadata.class)
+        );
+    }
+
+}

ccm-cms/src/main/java/org/librecms/contentsection/Asset.java

@@ -18,6 +18,7 @@
  */
 package org.librecms.contentsection;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import org.hibernate.envers.Audited;
 import org.libreccm.categorization.Categorization;
 import org.libreccm.core.CcmObject;
@@ -418,6 +419,7 @@ public class Asset extends CcmObject {
 
     @OneToMany(mappedBy = "asset")
     @OrderBy("sortKey ASC")
+    @JsonIgnore
     private List<ItemAttachment<?>> itemAttachments;
 
     @Embedded