Uploaded image for project: 'ModeShape'
  1. ModeShape
  2. MODE-2284

After import node tree all imported nodes lose backreferences

XMLWordPrintable

    • Hide
      JcrSessionTest.java
          @Test
    public void shouldRestoreBackreferencePropertiesAterImport() throws Exception {
        Node referenceableNode = session.getRootNode().addNode("referenceable");
        referenceableNode.addMixin(JcrMixLexicon.REFERENCEABLE.toString());
        Value strongRefValue = session.getValueFactory().createValue(referenceableNode, false);

        Node node1 = session.getRootNode().addNode("node1");
        node1.setProperty("prop1", strongRefValue);

        session.save();

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        session.exportSystemView("/referenceable", outputStream, false, false);

        // Import node tree. This lose backreferences for all nodes in the imported tree
        ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray());
        session.importXML("/referenceable", inputStream, ImportUUIDBehavior.IMPORT_UUID_COLLISION_REPLACE_EXISTING);

        // Now save the changes
        session.save();

        PropertyIterator propertyIterator = referenceableNode.getReferences();
        assertEquals(1, propertyIterator.getSize());
    }
      Show
      JcrSessionTest.java @Test public void shouldRestoreBackreferencePropertiesAterImport() throws Exception { Node referenceableNode = session.getRootNode().addNode( "referenceable" ); referenceableNode.addMixin(JcrMixLexicon.REFERENCEABLE.toString()); Value strongRefValue = session.getValueFactory().createValue(referenceableNode, false ); Node node1 = session.getRootNode().addNode( "node1" ); node1.setProperty( "prop1" , strongRefValue); session.save(); ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); session.exportSystemView( "/referenceable" , outputStream, false , false ); // Import node tree. This lose backreferences for all nodes in the imported tree ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray()); session.importXML( "/referenceable" , inputStream, ImportUUIDBehavior.IMPORT_UUID_COLLISION_REPLACE_EXISTING); // Now save the changes session.save(); PropertyIterator propertyIterator = referenceableNode.getReferences(); assertEquals(1, propertyIterator.getSize()); }

      After import existing node tree from xml all imported nodes lose backreferences.

      We write workaround helper which store existing backreferences before import and restore them after import:

      // Find in imported xml all nodes that exists in the store and memorize backreferences for them
BackreferencesRestorerContentHandlerWrapper referrersHandler = new BackreferencesRestorerContentHandlerWrapper(nodeIdentifier, session);
parser.setContentHandler(referrersHandler);
parser.parse(new InputSource(new ByteArrayInputStream(buffer)));

// Do import after that we lose backreferences
session.importXML(path, new ByteArrayInputStream(buffer), ImportUUIDBehavior.IMPORT_UUID_COLLISION_REPLACE_EXISTING);

// Now we restore backreferences...
referrersHandler.restoreReferences();

      But is bad workaround and not stable for production

              rhauch Randall Hauch (Inactive)
              gbelov_jira German Belov (Inactive)
              Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

                Created:
                Updated:
                Resolved: