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.datastructures.Callback;
  36 import org.simantics.utils.ui.ISelectionUtils;
  37
  38
  39 /**
  40  * @author Tuukka Lehtonen
  41  */
  42 public class Delete extends AbstractHandler {
  43
  44     protected final String virtualGraphId;
  45
  46     public Delete() {
  47         virtualGraphId = "experiments";
  48     }
  49
  50     @Override
  51     public Object execute(ExecutionEvent event) throws ExecutionException {
  52         Session session = Simantics.peekSession();
  53         if (session == null)
  54             return null;
  55         ISelection selection = HandlerUtil.getCurrentSelection(event);
  56         final List<Resource> resources = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  57         final VirtualGraph vg = virtualGraphId == null ? null :
  58             session.getService(VirtualGraphSupport.class).getWorkspacePersistent(virtualGraphId);
  59
  60         session.asyncRequest(new WriteRequest(vg) {
  61             @Override
  62             public void perform(WriteGraph graph) throws DatabaseException {
  63                 Layer0 L0 = Layer0.getInstance(graph);
  64                 EventResource EVENT = EventResource.getInstance(graph);
  65                 Set<Resource> eventLogs = new HashSet<Resource>();
  66                 for (Resource event : resources) {
  67                         if (graph.isInstanceOf(event, EVENT.Event)) {
  68                                 Resource slice = graph.getPossibleObject(event, L0.PartOf);
  69                                 if(slice != null) {
  70                                         Resource eventlog =     graph.getPossibleObject(slice, L0.PartOf);
  71                                 if (eventlog != null) eventLogs.add(eventlog);
  72                                 }
  73                         }
  74                         graph.deny( event );
  75                 }
  76                 for (Resource eventlog : eventLogs) {
  77                         if (graph.isInstanceOf(eventlog, EVENT.EventLog))
  78                             graph.syncRequest( new CorrectMilestoneLabelsAction(eventlog, vg) );
  79                 }
  80             }
  81         }, new Callback<DatabaseException>() {
  82             @Override
  83             public void run(DatabaseException e) {
  84                 if (e != null) Logger.defaultLogError(e);
  85             }
  86         });
  87         return null;
  88     }
  89
  90 }