bundles/org.simantics.event/src/org/simantics/event/view/handler/MilestoneListQuery.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.Collections;
  16 import java.util.Comparator;
  17
  18 import org.simantics.db.ReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.common.request.ResourceRead;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.db.exception.ManyObjectsForFunctionalRelationException;
  23 import org.simantics.db.exception.ServiceException;
  24 import org.simantics.event.ontology.EventResource;
  25 import org.simantics.layer0.Layer0;
  26
  27 /**
  28  * Query the all milestones of an event log.
  29  * The result is an array if resourcs, ordered by time in ascending order.
  30  *
  31  * @author toni.kalajainen
  32  */
  33 public class MilestoneListQuery extends ResourceRead<MilestoneList> {
  34
  35         public MilestoneListQuery(Resource eventlog) {
  36                 super(eventlog);
  37         }
  38
  39     @Override
  40     public MilestoneList perform(final ReadGraph graph) throws DatabaseException {
  41         MilestoneList result = new MilestoneList();
  42         result.milestones = new ArrayList<Resource>();
  43         Layer0 L0 = Layer0.getInstance(graph);
  44         final EventResource EVENT = EventResource.getInstance(graph);
  45
  46         //System.out.println("listing milestones");
  47         ArrayList<Resource> list = new ArrayList<Resource>();
  48         Resource eventLog = resource;
  49         if (eventLog != null) {
  50                 result.baseline = graph.getPossibleObject(eventLog, EVENT.EventLog_HasBaselineEvent);
  51                 for (Resource slice : graph.getObjects(eventLog, L0.ConsistsOf)) {
  52                 for (Resource event : graph.getObjects(slice, L0.ConsistsOf)) {
  53                         if (!graph.hasStatement(event, EVENT.Milestone)) continue;
  54                         list.add(event);
  55                 }
  56                 }
  57         }
  58
  59         Collections.sort(list, new Comparator<Resource>() {
  60                         @Override
  61                         public int compare(Resource o1, Resource o2) {
  62                                 try {
  63                                 Double t1 = graph.getPossibleRelatedValue(o1, EVENT.HasTimestamp);
  64                                 Double t2 = graph.getPossibleRelatedValue(o2, EVENT.HasTimestamp);
  65                                 if (t1==null) t1 = 0.0;
  66                                 if (t2==null) t2 = 0.0;
  67                                         return Double.compare(t1, t2);
  68                                 } catch (ManyObjectsForFunctionalRelationException e) {
  69                                         return 0;
  70                                 } catch (ServiceException e) {
  71                                         return 0;
  72                                 }
  73                         }});
  74                 result.milestones = list;
  75         return result;
  76     }
  77
  78         public Resource getEventLog() {
  79                 return resource;
  80         }
  81
  82
  83 }