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.ui.ErrorLogger;
  15
  16 /**
  17  * @author Tuukka Lehtonen
  18  */
  19 public class ClaimAction extends Action {
  20
  21     protected final String   virtualGraphId;
  22     protected final Resource subject;
  23     protected final String   relationURI;
  24     protected final Resource object;
  25
  26     /**
  27      * @param label
  28      * @param image
  29      * @param virtualGraphId
  30      * @param tagURI
  31      * @param tag <code>true</code> to add tag, <code>false</code> to remove tag
  32      * @param input
  33      */
  34     public ClaimAction(String label, ImageDescriptor image, String virtualGraphId, Resource subject, String relationURI, Resource object) {
  35         super(label, image);
  36
  37         this.virtualGraphId = virtualGraphId;
  38         this.subject = subject;
  39         this.relationURI = relationURI;
  40         this.object = object;
  41     }
  42
  43     @Override
  44     public void run() {
  45         Session session = Simantics.peekSession();
  46         if (session != null) {
  47             VirtualGraph vg = virtualGraphId == null ? null :
  48                 session.getService(VirtualGraphSupport.class).getWorkspacePersistent(virtualGraphId);
  49             session.asyncRequest(new WriteRequest(vg) {
  50                 @Override
  51                 public void perform(WriteGraph graph) throws DatabaseException {
  52                     claim(graph);
  53                 }
  54             }, e -> {
  55                 if (e != null)
  56                     ErrorLogger.defaultLogError(e);
  57             });
  58         }
  59     }
  60
  61     public void claim(WriteGraph graph) throws DatabaseException {
  62         Layer0 L0 = Layer0.getInstance(graph);
  63         Resource relation = graph.getResource(relationURI);
  64         boolean functional = graph.isInstanceOf(relation, L0.FunctionalRelation);
  65         if (functional)
  66             graph.deny(subject, relation);
  67         graph.claim(subject, graph.getResource(relationURI), object);
  68     }
  69
  70 }