1 package org.simantics.event.view.handler;
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;
18 * @author Tuukka Lehtonen
20 public class ClaimAction extends Action {
22 protected final String virtualGraphId;
23 protected final Resource subject;
24 protected final String relationURI;
25 protected final Resource object;
30 * @param virtualGraphId
32 * @param tag <code>true</code> to add tag, <code>false</code> to remove tag
35 public ClaimAction(String label, ImageDescriptor image, String virtualGraphId, Resource subject, String relationURI, Resource object) {
38 this.virtualGraphId = virtualGraphId;
39 this.subject = subject;
40 this.relationURI = relationURI;
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) {
52 public void perform(WriteGraph graph) throws DatabaseException {
55 }, new Callback<DatabaseException>() {
57 public void run(DatabaseException parameter) {
58 if (parameter != null)
59 ErrorLogger.defaultLogError(parameter);
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);
70 graph.deny(subject, relation);
71 graph.claim(subject, graph.getResource(relationURI), object);