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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in
   3  * 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.ArrayList;
  15 import java.util.Collection;
  16 import java.util.List;
  17
  18 import org.simantics.db.ReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.common.request.UniqueRead;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.event.ontology.EventResource;
  23 import org.simantics.layer0.Layer0;
  24
  25 /**
  26  * Given a list of events, return respective eventlogs.
  27  */
  28 public class GetEventLogsQuery extends UniqueRead<Collection<Resource>> {
  29
  30         Collection<Resource> events;
  31
  32         public GetEventLogsQuery(Collection<Resource> events) {
  33                 this.events = events;
  34         }
  35
  36         @Override
  37         public Collection<Resource> perform(ReadGraph graph) throws DatabaseException {
  38                 Layer0 L0 = Layer0.getInstance(graph);
  39                 EventResource EVENT = EventResource.getInstance(graph);
  40                 List<Resource> eventlogs = new ArrayList<Resource>(1);
  41                 for (Resource event : events) {
  42                         Resource eventslice = graph.getPossibleObject(event, L0.PartOf);
  43                         if (eventslice==null || !graph.isInstanceOf(eventslice, EVENT.EventSlice)) continue;
  44                         Resource eventlog = graph.getPossibleObject(eventslice, L0.PartOf);
  45                         if (eventlog==null || !graph.isInstanceOf(eventlog, EVENT.EventLog)) continue;
  46                         if (!eventlogs.contains( event )) {
  47                                 eventlogs.add( eventlog );
  48                         }
  49                 }
  50                 return eventlogs;
  51         }
  52
  53
  54 }