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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
   3  * 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.ArrayList;\r
  15 import java.util.Collections;\r
  16 import java.util.Comparator;\r
  17 \r
  18 import org.simantics.db.ReadGraph;\r
  19 import org.simantics.db.Resource;\r
  20 import org.simantics.db.common.request.ResourceRead;\r
  21 import org.simantics.db.exception.DatabaseException;\r
  22 import org.simantics.db.exception.ManyObjectsForFunctionalRelationException;\r
  23 import org.simantics.db.exception.ServiceException;\r
  24 import org.simantics.event.ontology.EventResource;\r
  25 import org.simantics.layer0.Layer0;\r
  26 \r
  27 /**\r
  28  * Query the all milestones of an event log. \r
  29  * The result is an array if resourcs, ordered by time in ascending order.  \r
  30  *  \r
  31  * @author toni.kalajainen\r
  32  */\r
  33 public class MilestoneListQuery extends ResourceRead<MilestoneList> {\r
  34         \r
  35         public MilestoneListQuery(Resource eventlog) {\r
  36                 super(eventlog);\r
  37         }\r
  38         \r
  39     @Override\r
  40     public MilestoneList perform(final ReadGraph graph) throws DatabaseException {\r
  41         MilestoneList result = new MilestoneList();\r
  42         result.milestones = new ArrayList<Resource>();\r
  43         Layer0 L0 = Layer0.getInstance(graph);\r
  44         final EventResource EVENT = EventResource.getInstance(graph);\r
  45 \r
  46         //System.out.println("listing milestones");\r
  47         ArrayList<Resource> list = new ArrayList<Resource>();\r
  48         Resource eventLog = resource;\r
  49         if (eventLog != null) {\r
  50                 result.baseline = graph.getPossibleObject(eventLog, EVENT.EventLog_HasBaselineEvent);\r
  51                 for (Resource slice : graph.getObjects(eventLog, L0.ConsistsOf)) {\r
  52                 for (Resource event : graph.getObjects(slice, L0.ConsistsOf)) {\r
  53                         if (!graph.hasStatement(event, EVENT.Milestone)) continue;\r
  54                         list.add(event);\r
  55                 }\r
  56                 }\r
  57         }\r
  58         \r
  59         Collections.sort(list, new Comparator<Resource>() {\r
  60                         @Override\r
  61                         public int compare(Resource o1, Resource o2) {\r
  62                                 try {\r
  63                                 Double t1 = graph.getPossibleRelatedValue(o1, EVENT.HasTimestamp);\r
  64                                 Double t2 = graph.getPossibleRelatedValue(o2, EVENT.HasTimestamp);\r
  65                                 if (t1==null) t1 = 0.0;\r
  66                                 if (t2==null) t2 = 0.0;\r
  67                                         return Double.compare(t1, t2);\r
  68                                 } catch (ManyObjectsForFunctionalRelationException e) {\r
  69                                         return 0;\r
  70                                 } catch (ServiceException e) {\r
  71                                         return 0;\r
  72                                 }\r
  73                         }});\r
  74                 result.milestones = list;\r
  75         return result;\r
  76     }\r
  77 \r
  78         public Resource getEventLog() {\r
  79                 return resource;\r
  80         }       \r
  81 \r
  82 \r
  83 }\r