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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.event.view.handler;
  13
  14 import java.util.HashSet;
  15 import java.util.List;
  16 import java.util.Set;
  17
  18 import org.eclipse.core.commands.AbstractHandler;
  19 import org.eclipse.core.commands.ExecutionEvent;
  20 import org.eclipse.core.commands.ExecutionException;
  21 import org.eclipse.jface.viewers.ISelection;
  22 import org.eclipse.ui.handlers.HandlerUtil;
  23 import org.simantics.Simantics;
  24 import org.simantics.db.Resource;
  25 import org.simantics.db.Session;
  26 import org.simantics.db.VirtualGraph;
  27 import org.simantics.db.WriteGraph;
  28 import org.simantics.db.common.request.WriteRequest;
  29 import org.simantics.db.common.utils.Logger;
  30 import org.simantics.db.exception.DatabaseException;
  31 import org.simantics.db.layer0.SelectionHints;
  32 import org.simantics.db.service.VirtualGraphSupport;
  33 import org.simantics.event.ontology.EventResource;
  34 import org.simantics.layer0.Layer0;
  35 import org.simantics.utils.ui.ISelectionUtils;
  36
  37
  38 /**
  39  * @author Tuukka Lehtonen
  40  */
  41 public class Delete extends AbstractHandler {
  42
  43     protected final String virtualGraphId;
  44
  45     public Delete() {
  46         virtualGraphId = "experiments";
  47     }
  48
  49     @Override
  50     public Object execute(ExecutionEvent event) throws ExecutionException {
  51         Session session = Simantics.peekSession();
  52         if (session == null)
  53             return null;
  54         ISelection selection = HandlerUtil.getCurrentSelection(event);
  55         final List<Resource> resources = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  56         final VirtualGraph vg = virtualGraphId == null ? null :
  57             session.getService(VirtualGraphSupport.class).getWorkspacePersistent(virtualGraphId);
  58
  59         session.asyncRequest(new WriteRequest(vg) {
  60             @Override
  61             public void perform(WriteGraph graph) throws DatabaseException {
  62                 Layer0 L0 = Layer0.getInstance(graph);
  63                 EventResource EVENT = EventResource.getInstance(graph);
  64                 Set<Resource> eventLogs = new HashSet<Resource>();
  65                 for (Resource event : resources) {
  66                         if (graph.isInstanceOf(event, EVENT.Event)) {
  67                                 Resource slice = graph.getPossibleObject(event, L0.PartOf);
  68                                 if(slice != null) {
  69                                         Resource eventlog =     graph.getPossibleObject(slice, L0.PartOf);
  70                                 if (eventlog != null) eventLogs.add(eventlog);
  71                                 }
  72                         }
  73                         graph.deny( event );
  74                 }
  75                 for (Resource eventlog : eventLogs) {
  76                         if (graph.isInstanceOf(eventlog, EVENT.EventLog))
  77                             graph.syncRequest( new CorrectMilestoneLabelsAction(eventlog, vg) );
  78                 }
  79             }
  80         }, e -> {
  81             if (e != null) Logger.defaultLogError(e);
  82         });
  83         return null;
  84     }
  85
  86 }