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

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