bundles/org.simantics.event/src/org/simantics/event/view/handler/ClaimAction.java

   1 package org.simantics.event.view.handler;
   2
   3 import org.eclipse.jface.action.Action;
   4 import org.eclipse.jface.resource.ImageDescriptor;
   5 import org.simantics.Simantics;
   6 import org.simantics.db.Resource;
   7 import org.simantics.db.Session;
   8 import org.simantics.db.VirtualGraph;
   9 import org.simantics.db.WriteGraph;
  10 import org.simantics.db.common.request.WriteRequest;
  11 import org.simantics.db.exception.DatabaseException;
  12 import org.simantics.db.service.VirtualGraphSupport;
  13 import org.simantics.layer0.Layer0;
  14 import org.simantics.utils.datastructures.Callback;
  15 import org.simantics.utils.ui.ErrorLogger;
  16
  17 /**
  18  * @author Tuukka Lehtonen
  19  */
  20 public class ClaimAction extends Action {
  21
  22     protected final String   virtualGraphId;
  23     protected final Resource subject;
  24     protected final String   relationURI;
  25     protected final Resource object;
  26
  27     /**
  28      * @param label
  29      * @param image
  30      * @param virtualGraphId
  31      * @param tagURI
  32      * @param tag <code>true</code> to add tag, <code>false</code> to remove tag
  33      * @param input
  34      */
  35     public ClaimAction(String label, ImageDescriptor image, String virtualGraphId, Resource subject, String relationURI, Resource object) {
  36         super(label, image);
  37
  38         this.virtualGraphId = virtualGraphId;
  39         this.subject = subject;
  40         this.relationURI = relationURI;
  41         this.object = object;
  42     }
  43
  44     @Override
  45     public void run() {
  46         Session session = Simantics.peekSession();
  47         if (session != null) {
  48             VirtualGraph vg = virtualGraphId == null ? null :
  49                 session.getService(VirtualGraphSupport.class).getWorkspacePersistent(virtualGraphId);
  50             session.asyncRequest(new WriteRequest(vg) {
  51                 @Override
  52                 public void perform(WriteGraph graph) throws DatabaseException {
  53                     claim(graph);
  54                 }
  55             }, new Callback<DatabaseException>() {
  56                 @Override
  57                 public void run(DatabaseException parameter) {
  58                     if (parameter != null)
  59                         ErrorLogger.defaultLogError(parameter);
  60                 }
  61             });
  62         }
  63     }
  64
  65     public void claim(WriteGraph graph) throws DatabaseException {
  66         Layer0 L0 = Layer0.getInstance(graph);
  67         Resource relation = graph.getResource(relationURI);
  68         boolean functional = graph.isInstanceOf(relation, L0.FunctionalRelation);
  69         if (functional)
  70             graph.deny(subject, relation);
  71         graph.claim(subject, graph.getResource(relationURI), object);
  72     }
  73
  74 }