eu.etaxonomy.taxeditor.navigation/src/main/java/eu/etaxonomy/taxeditor/navigation/key/polytomous/PolytomousKeyViewPartDataChangeBehavior.java

   1 /**
   2 * Copyright (C) 2007 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9
  10 package eu.etaxonomy.taxeditor.navigation.key.polytomous;
  11
  12 import org.eclipse.core.runtime.IProgressMonitor;
  13 import org.eclipse.core.runtime.IStatus;
  14 import org.eclipse.core.runtime.Status;
  15 import org.eclipse.core.runtime.jobs.Job;
  16 import org.eclipse.swt.widgets.Display;
  17
  18 import eu.etaxonomy.cdm.model.common.CdmBase;
  19 import eu.etaxonomy.cdm.model.description.PolytomousKey;
  20 import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeEvent;
  21 import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeEvent.EventType;
  22 import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;
  23 import eu.etaxonomy.taxeditor.model.AbstractDataChangeBehaviour;
  24
  25 /**
  26  * @author n.hoffmann
  27  * @created May 5, 2011
  28  * @version 1.0
  29  */
  30 public class PolytomousKeyViewPartDataChangeBehavior extends
  31                 AbstractDataChangeBehaviour {
  32
  33         private final PolytomousKeyViewPart source;
  34
  35         /**
  36          * @param polytomousKeyViewPart
  37          */
  38         public PolytomousKeyViewPartDataChangeBehavior(
  39                         PolytomousKeyViewPart polytomousKeyViewPart) {
  40                 source = polytomousKeyViewPart;
  41         }
  42
  43         /* (non-Javadoc)
  44          * @see eu.etaxonomy.taxeditor.model.AbstractDataChangeBehaviour#reactOnDataChange(eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap)
  45          */
  46         @Override
  47         public void reactOnDataChange(CdmDataChangeMap changeEvents) {
  48                 if(isRelevant(changeEvents)){
  49                         final Display display = Display.getCurrent();
  50                         Job job = new Job("Updating Polytomous Key Viewer") {
  51
  52                                 @Override
  53                                 protected IStatus run(IProgressMonitor monitor) {
  54                                         monitor.beginTask("Updating Polytomous Key Viewer", 3);
  55                                         monitor.worked(1);
  56
  57                                         // clear the session completely
  58                                         monitor.subTask("Clearing Polytomous Key Viewer session");
  59                                         display.asyncExec(new Runnable() {
  60                                                  public void run() {
  61                                                          source.getConversationHolder().clear();
  62                                                  }
  63                                         });
  64                                         // FIXME completely clearing the session is a brute force approach.
  65                                         // It would be much more elegant to clear only those elements that have been changed.
  66                                         // I could not get that to work but we should consider workin on this because we might
  67                                         // run into serious performance issues, especially when it comes to large trees
  68                                         //
  69                                         // at least, we moved this to a job so it can run in a background thred
  70                                         // seems to improve the situation but not sure if final solution
  71                                         monitor.worked(1);
  72
  73                                         monitor.subTask("Refreshing viewer");
  74
  75                                         display.asyncExec(new Runnable() {
  76                                             public void run() {
  77                                                 source.refresh();
  78                                             }
  79                                         });
  80
  81
  82
  83                                         monitor.worked(1);
  84                                         monitor.done();
  85                                         return Status.OK_STATUS;
  86                                 }
  87                         };
  88
  89                         job.setPriority(Job.SHORT);
  90                         job.schedule();
  91
  92                 }
  93         }
  94
  95         /**
  96          * @return
  97          */
  98         private boolean isRelevant(CdmDataChangeMap changeEvents) {
  99                 for(CdmDataChangeEvent event : changeEvents.getAllEvents()){
 100                         EventType eventType = event.getEventType();
 101                         CdmBase eventEntity = event.getEntity();
 102
 103                         // all poyltomous key changes are relevant
 104                         if((eventType == EventType.INSERT || eventType == EventType.DELETE || eventType == EventType.UPDATE)
 105                                         && eventEntity instanceof PolytomousKey){
 106                                 return true;
 107                         }
 108                 }
 109                 return false;
 110         }
 111 }