ImExporters for Publication entities

sci-publications/src/main/java/org/scientificcms/publications/AbstractPublicationImExporter.java

@@ -0,0 +1,42 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.AbstractEntityImExporter;
+
+import javax.inject.Inject;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ * @param <T> The publication type.
+ */
+public abstract class AbstractPublicationImExporter<T extends Publication>
+    extends AbstractEntityImExporter<T> {
+
+    @Inject
+    private PublicationRepository publicationRepo;
+
+    @Override
+    protected void saveImportedEntity(final Publication publication) {
+        publicationRepo.save(publication);
+    }
+
+    @Override
+    protected T reloadEntity(final T publication) {
+        return publicationRepo
+            .findByIdAndType(
+                publication.getPublicationId(),
+                getEntityClass()
+            )
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "No publication of type %s with ID %d found in "
+                            + "the database.",
+                        publication.getClass().getName(),
+                        publication.getPublicationId()
+                    )
+                )
+            );
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/AbstractPublicationWithPublisherImExporter.java

@@ -0,0 +1,28 @@
+package org.scientificcms.publications;
+
+import java.util.Set;
+
+import javax.annotation.PostConstruct;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ * @param <T> Type of publication.
+ */
+public abstract class AbstractPublicationWithPublisherImExporter<T extends PublicationWithPublisher>
+    extends AbstractPublicationImExporter<T> {
+    
+    @Override
+    @PostConstruct
+    protected final void init() {
+        addRequiredEntities(
+            Set.of(
+                Publisher.class
+            )
+        );
+        initPublicationWithPublisherImExporter();
+    }
+    
+    protected abstract void initPublicationWithPublisherImExporter();
+
+}

sci-publications/src/main/java/org/scientificcms/publications/AbstractUnPublishedImExporter.java

@@ -0,0 +1,24 @@
+package org.scientificcms.publications;
+
+import org.librecms.assets.Organization;
+
+import java.util.Set;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ * @param <T> Subtype of {@link UnPublished}.
+ */
+public abstract class AbstractUnPublishedImExporter<T extends UnPublished>
+    extends AbstractPublicationImExporter<T> {
+
+    @Override
+    protected final void init() {
+        addRequiredEntities(
+            Set.of(Organization.class)
+        );
+    }
+    
+    protected abstract void initUnPublishedImExporter();
+    
+}

sci-publications/src/main/java/org/scientificcms/publications/ArticleInCollectedVolume.java

@@ -1,8 +1,3 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
 package org.scientificcms.publications;
 
 import com.fasterxml.jackson.annotation.JsonIdentityInfo;

sci-publications/src/main/java/org/scientificcms/publications/ArticleInCollectedVolumeImExporter.java

@@ -0,0 +1,36 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(ArticleInCollectedVolume.class)
+public class ArticleInCollectedVolumeImExporter 
+extends AbstractPublicationImExporter<ArticleInCollectedVolume>{
+
+    @Override
+    public Class<ArticleInCollectedVolume> getEntityClass() {
+        return ArticleInCollectedVolume.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void init() {
+        addRequiredEntities(
+            Set.of(
+                CollectedVolume.class
+            )
+        );
+    }
+    
+    
+    
+}

sci-publications/src/main/java/org/scientificcms/publications/ArticleInJournal.java

@@ -1,8 +1,3 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
 package org.scientificcms.publications;
 
 import com.fasterxml.jackson.annotation.JsonIdentityInfo;

sci-publications/src/main/java/org/scientificcms/publications/ArticleInJournalImExporter.java

@@ -0,0 +1,34 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(ArticleInJournal.class)
+public class ArticleInJournalImExporter
+    extends AbstractPublicationImExporter<ArticleInJournal> {
+
+    @Override
+    public Class<ArticleInJournal> getEntityClass() {
+        return ArticleInJournal.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void init() {
+        addRequiredEntities(
+            Set.of(
+            Journal.class
+        )
+        );
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/AuthorshipImExporter.java

@@ -18,6 +18,7 @@ import org.scientificcms.publications.contenttypes.WorkingPaperItem;
 import java.util.Objects;
 import java.util.Set;
 
+import javax.annotation.PostConstruct;
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
 import javax.persistence.EntityManager;
@@ -37,6 +38,7 @@ public class AuthorshipImExporter
     private EntityManager entityManager;
 
     @Override
+    @PostConstruct
     protected void init() {
         addRequiredEntities(
             Set.of(

sci-publications/src/main/java/org/scientificcms/publications/CollectedVolume.java

@@ -1,8 +1,3 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
 package org.scientificcms.publications;
 
 import com.fasterxml.jackson.annotation.JsonIdentityInfo;

sci-publications/src/main/java/org/scientificcms/publications/CollectedVolumeImExporter.java

@@ -0,0 +1,26 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(CollectedVolume.class)
+public class CollectedVolumeImExporter
+    extends AbstractPublicationWithPublisherImExporter<CollectedVolume> {
+
+    @Override
+    public Class<CollectedVolume> getEntityClass() {
+        return CollectedVolume.class;
+    }
+
+    @Override
+    protected void initPublicationWithPublisherImExporter() {
+        // Nothing
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/ExpertiseImExporter.java

@@ -0,0 +1,35 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+import org.librecms.assets.Organization;
+
+import java.util.Set;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Expertise.class)
+public class ExpertiseImExporter 
+    extends AbstractPublicationImExporter<Expertise>{
+
+    @Override
+    public Class<Expertise> getEntityClass() {
+        return Expertise.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void init() {
+        addRequiredEntities(
+            Set.of(
+                Organization.class
+            )
+        );
+    }
+    
+}

sci-publications/src/main/java/org/scientificcms/publications/GreyLiteratureImExporter.java

@@ -0,0 +1,28 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(GreyLiterature.class)
+public class GreyLiteratureImExporter
+    extends AbstractUnPublishedImExporter<GreyLiterature> {
+
+    @Override
+    public Class<GreyLiterature> getEntityClass() {
+        return GreyLiterature.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void initUnPublishedImExporter() {
+        // Nothing
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/InProceedingsImExporter.java

@@ -0,0 +1,34 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+
+import java.util.Set;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(InProceedings.class)
+public class InProceedingsImExporter
+    extends AbstractPublicationImExporter<InProceedings> {
+
+    @Override
+    public Class<InProceedings> getEntityClass() {
+        return InProceedings.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void init() {
+        addRequiredEntities(
+            Set.of(
+                Proceedings.class
+            )
+        );
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/InternetArticleImExporter.java

@@ -0,0 +1,31 @@
+package org.scientificcms.publications;
+
+import org.librecms.assets.Organization;
+
+import java.util.Set;
+
+import javax.annotation.PostConstruct;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class InternetArticleImExporter
+    extends AbstractPublicationImExporter<InternetArticle> {
+
+    @Override
+    public Class<InternetArticle> getEntityClass() {
+        return InternetArticle.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void init() {
+        addRequiredEntities(
+            Set.of(
+                Organization.class
+            )
+        );
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/Journal.java

@@ -9,6 +9,7 @@ import com.fasterxml.jackson.annotation.JsonIdentityInfo;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.ObjectIdGenerators;
 import org.hibernate.envers.Audited;
+import org.libreccm.imexport.Exportable;
 import org.libreccm.l10n.LocalizedString;
 
 import java.io.Serializable;
@@ -56,7 +57,7 @@ import static org.scientificcms.publications.SciPublicationsConstants.*;
     resolver = JournalIdResolver.class,
     property = "uuid"
 )
-public class Journal implements Serializable {
+public class Journal implements Exportable, Serializable {
 
     private static final long serialVersionUID = 1L;
 

sci-publications/src/main/java/org/scientificcms/publications/JournalImExporter.java

@@ -0,0 +1,54 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.AbstractEntityImExporter;
+import org.libreccm.imexport.Processes;
+
+import java.util.Objects;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Journal.class)
+public class JournalImExporter
+    extends AbstractEntityImExporter<Journal> {
+
+    @Inject
+    private JournalRepository journalRepo;
+
+    @Override
+    public Class<Journal> getEntityClass() {
+        return Journal.class;
+    }
+
+    @PostConstruct
+    @Override
+    protected void init() {
+        // Nothing
+    }
+
+    @Override
+    protected void saveImportedEntity(final Journal journal) {
+        journalRepo.save(journal);
+    }
+
+    @Override
+    protected Journal reloadEntity(final Journal journal) {
+        return journalRepo
+            .findById(Objects.requireNonNull(journal.getJournalId()))
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "No Journal with ID %d found in the database.",
+                        journal.getJournalId()
+                    )
+                )
+            );
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/MonographImExporter.java

@@ -0,0 +1,28 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Monograph.class)
+public class MonographImExporter
+    extends AbstractPublicationWithPublisherImExporter<Monograph> {
+
+    @Override
+    public Class<Monograph> getEntityClass() {
+        return Monograph.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void initPublicationWithPublisherImExporter() {
+        // Nothing
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/ProceedingsImExporter.java

@@ -0,0 +1,28 @@
+package org.scientificcms.publications;
+
+import org.librecms.assets.Organization;
+
+import java.util.Set;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class ProceedingsImExporter
+    extends AbstractPublicationWithPublisherImExporter<Proceedings> {
+
+    @Override
+    public Class<Proceedings> getEntityClass() {
+        return Proceedings.class;
+    }
+
+    @Override
+    protected void initPublicationWithPublisherImExporter() {
+        addRequiredEntities(
+            Set.of(
+                Organization.class
+            )
+        );
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/Publication.java

@@ -11,6 +11,7 @@ import com.fasterxml.jackson.annotation.ObjectIdGenerators;
 import org.hibernate.annotations.NamedQueries;
 import org.hibernate.annotations.NamedQuery;
 import org.hibernate.envers.Audited;
+import org.libreccm.imexport.Exportable;
 import org.libreccm.l10n.LocalizedString;
 
 import java.io.Serializable;
@@ -101,7 +102,7 @@ import static org.scientificcms.publications.SciPublicationsConstants.*;
     resolver = PublicationIdResolver.class,
     property = "uuid"
 )
-public class Publication implements Serializable {
+public class Publication implements Exportable, Serializable {
 
     private static final long serialVersionUID = 1L;
 

sci-publications/src/main/java/org/scientificcms/publications/PublicationWithPublisher.java

@@ -7,8 +7,6 @@ package org.scientificcms.publications;
 
 import com.fasterxml.jackson.annotation.JsonIdentityInfo;
 import com.fasterxml.jackson.annotation.JsonIdentityReference;
-import com.fasterxml.jackson.annotation.JsonIgnore;
-import com.fasterxml.jackson.annotation.ObjectIdGenerator;
 import com.fasterxml.jackson.annotation.ObjectIdGenerators;
 import org.hibernate.envers.Audited;
 import org.libreccm.l10n.LocalizedString;

sci-publications/src/main/java/org/scientificcms/publications/Publisher.java

@@ -9,6 +9,7 @@ import com.fasterxml.jackson.annotation.JsonIdentityInfo;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.ObjectIdGenerators;
 import org.hibernate.envers.Audited;
+import org.libreccm.imexport.Exportable;
 
 import java.io.Serializable;
 import java.util.ArrayList;
@@ -51,7 +52,7 @@ import static org.scientificcms.publications.SciPublicationsConstants.*;
     resolver = PublisherIdResolver.class,
     property = "uuid"
 )
-public class Publisher implements Serializable {
+public class Publisher implements Exportable, Serializable {
 
     private static final long serialVersionUID = 1L;
 

sci-publications/src/main/java/org/scientificcms/publications/PublisherImExporter.java

@@ -0,0 +1,51 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.AbstractEntityImExporter;
+import org.libreccm.imexport.Processes;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Publisher.class)
+public class PublisherImExporter extends AbstractEntityImExporter<Publisher> {
+
+    @Inject
+    private PublisherRepository publisherRepo;
+
+    @Override
+    public Class<Publisher> getEntityClass() {
+        return Publisher.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void init() {
+        // Nothing
+    }
+
+    @Override
+    protected void saveImportedEntity(final Publisher publisher) {
+        publisherRepo.save(publisher);
+    }
+
+    @Override
+    protected Publisher reloadEntity(final Publisher publisher) {
+        return publisherRepo
+            .findById(publisher.getPublisherId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "No Publisher with ID %d found in the database.",
+                        publisher.getPublisherId()
+                    )
+                )
+            );
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/Series.java

@@ -4,6 +4,7 @@ import com.fasterxml.jackson.annotation.JsonIdentityInfo;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.ObjectIdGenerators;
 import org.hibernate.envers.Audited;
+import org.libreccm.imexport.Exportable;
 import org.libreccm.l10n.LocalizedString;
 
 import java.io.Serializable;
@@ -50,7 +51,7 @@ import static org.scientificcms.publications.SciPublicationsConstants.*;
     resolver = SeriesIdResolver.class,
     property = "uuid"
 )
-public class Series implements Serializable {
+public class Series implements Exportable, Serializable {
 
     private static final long serialVersionUID = 1L;
 

sci-publications/src/main/java/org/scientificcms/publications/SeriesImExporter.java

@@ -0,0 +1,53 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.AbstractEntityImExporter;
+import org.libreccm.imexport.Processes;
+
+import java.util.Objects;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Series.class)
+public class SeriesImExporter extends AbstractEntityImExporter<Series> {
+
+    @Inject
+    private SeriesRepository seriesRepo;
+
+    @Override
+    public Class<Series> getEntityClass() {
+        return Series.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void init() {
+        // Nothing
+    }
+
+    @Override
+    protected void saveImportedEntity(final Series series) {
+        seriesRepo.save(series);
+    }
+
+    @Override
+    protected Series reloadEntity(final Series series) {
+        return seriesRepo
+            .findById(Objects.requireNonNull(series).getSeriesId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "No Series with ID %d found in the database.",
+                        series.getSeriesId()
+                    )
+                )
+            );
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/TalkImExporter.java

@@ -0,0 +1,27 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(Talk.class)
+public class TalkImExporter extends AbstractPublicationImExporter<Talk> {
+
+    @Override
+    public Class<Talk> getEntityClass() {
+        return Talk.class;
+    }
+
+    @Override
+    @PostConstruct
+    protected void init() {
+        // Nothing
+    }
+
+}

sci-publications/src/main/java/org/scientificcms/publications/VolumeInSeriesImExporter.java

@@ -18,6 +18,7 @@ import org.scientificcms.publications.contenttypes.WorkingPaperItem;
 import java.util.Objects;
 import java.util.Set;
 
+import javax.annotation.PostConstruct;
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
 import javax.persistence.EntityManager;
@@ -37,6 +38,7 @@ public class VolumeInSeriesImExporter
     private EntityManager entityManager;
 
     @Override
+    @PostConstruct
     protected void init() {
         addRequiredEntities(
             Set.of(

sci-publications/src/main/java/org/scientificcms/publications/WorkingPaper.java

@@ -1,8 +1,3 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
 package org.scientificcms.publications;
 
 import com.fasterxml.jackson.annotation.JsonIdentityInfo;

sci-publications/src/main/java/org/scientificcms/publications/WorkingPaperImExporter.java

@@ -0,0 +1,28 @@
+package org.scientificcms.publications;
+
+import org.libreccm.imexport.Processes;
+
+import javax.enterprise.context.RequestScoped;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(WorkingPaper.class)
+public class WorkingPaperImExporter 
+    extends AbstractUnPublishedImExporter<WorkingPaper>{
+
+    @Override
+    public Class<WorkingPaper> getEntityClass() {
+ return WorkingPaper.class;
+    }
+
+    @Override
+    protected void initUnPublishedImExporter() {
+        // Nothing
+    }
+    
+    
+    
+}

sci-publications/src/main/java/org/scientificcms/publications/assets/CollectedVolumeAsset.java

@@ -1,5 +1,6 @@
 package org.scientificcms.publications.assets;
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.assets.AssetType;
 import org.librecms.contentsection.Asset;
@@ -48,6 +49,7 @@ public class CollectedVolumeAsset
                          CascadeType.REFRESH
     })
     @JoinColumn(name = "COLLECTED_VOLUME_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private CollectedVolume collectedVolume;
 
     @Override

sci-publications/src/main/java/org/scientificcms/publications/assets/JournalAsset.java

@@ -6,6 +6,7 @@
 package org.scientificcms.publications.assets;
 
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.assets.AssetType;
 import org.librecms.contentsection.Asset;
@@ -53,6 +54,7 @@ public class JournalAsset extends Asset {
                          CascadeType.REFRESH
     })
     @JoinColumn(name = "JOURNAL_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private Journal journal;
 
     public Journal getJournal() {

sci-publications/src/main/java/org/scientificcms/publications/assets/ProceedingsAsset.java

@@ -1,5 +1,6 @@
 package org.scientificcms.publications.assets;
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.assets.AssetType;
 import org.librecms.contentsection.Asset;
@@ -48,6 +49,7 @@ public class ProceedingsAsset
                          CascadeType.REFRESH
     })
     @JoinColumn(name = "PROCEEDINGS_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private Proceedings proceedings;
 
     @Override

sci-publications/src/main/java/org/scientificcms/publications/assets/PublisherAsset.java

@@ -1,5 +1,6 @@
 package org.scientificcms.publications.assets;
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.assets.AssetType;
 import org.librecms.contentsection.Asset;
@@ -48,6 +49,7 @@ public class PublisherAsset extends Asset {
                          CascadeType.REFRESH
     })
     @JoinColumn(name = "PUBLISHER_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private Publisher publisher;
 
     public Publisher getPublisher() {

sci-publications/src/main/java/org/scientificcms/publications/assets/SeriesAsset.java

@@ -5,6 +5,7 @@
  */
 package org.scientificcms.publications.assets;
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.assets.AssetType;
 import org.librecms.contentsection.Asset;
@@ -51,6 +52,7 @@ public class SeriesAsset extends Asset {
                          CascadeType.REFRESH
     })
     @JoinColumn(name = "SERIES_ID")
+    @JsonIdentityReference(alwaysAsId = true)
     private Series series;
 
     public Series getSeries() {

sci-publications/src/main/java/org/scientificcms/publications/contenttypes/ProceedingsItem.java

@@ -1,8 +1,3 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
 package org.scientificcms.publications.contenttypes;
 
 import org.librecms.contenttypes.ContentTypeDescription;

sci-publications/src/main/java/org/scientificcms/publications/contenttypes/PublicationItem.java

@@ -1,10 +1,6 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
 package org.scientificcms.publications.contenttypes;
 
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import org.hibernate.envers.Audited;
 import org.librecms.contentsection.ContentItem;
 import org.scientificcms.publications.Publication;
@@ -49,6 +45,7 @@ public class PublicationItem<T extends Publication> extends ContentItem {
         fetch = FetchType.LAZY,
         targetEntity = Publication.class
     )
+    @JsonIdentityReference(alwaysAsId = true)
     private T publication;
 
     public T getPublication() {