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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.navigation.key.polytomous;
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import org.eclipse.core.runtime.IProgressMonitor;
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import org.eclipse.core.runtime.IStatus;
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import org.eclipse.core.runtime.Status;
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import org.eclipse.core.runtime.jobs.Job;
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import org.eclipse.swt.widgets.Display;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.description.PolytomousKey;
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import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeEvent;
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import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeEvent.EventType;
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import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;
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import eu.etaxonomy.taxeditor.model.AbstractDataChangeBehaviour;
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/**
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* @author n.hoffmann
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* @created May 5, 2011
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* @version 1.0
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*/
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public class PolytomousKeyViewPartDataChangeBehavior extends
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AbstractDataChangeBehaviour {
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private final PolytomousKeyViewPart source;
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/**
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* @param polytomousKeyViewPart
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*/
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public PolytomousKeyViewPartDataChangeBehavior(
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PolytomousKeyViewPart polytomousKeyViewPart) {
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source = polytomousKeyViewPart;
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.taxeditor.model.AbstractDataChangeBehaviour#reactOnDataChange(eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap)
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*/
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@Override
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public void reactOnDataChange(CdmDataChangeMap changeEvents) {
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if(isRelevant(changeEvents)){
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final Display display = Display.getCurrent();
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Job job = new Job("Updating Polytomous Key Viewer") {
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@Override
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protected IStatus run(IProgressMonitor monitor) {
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monitor.beginTask("Updating Polytomous Key Viewer", 3);
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monitor.worked(1);
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// clear the session completely
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monitor.subTask("Clearing Polytomous Key Viewer session");
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display.asyncExec(new Runnable() {
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public void run() {
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source.getConversationHolder().clear();
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}
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});
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// FIXME completely clearing the session is a brute force approach.
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// It would be much more elegant to clear only those elements that have been changed.
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// I could not get that to work but we should consider workin on this because we might
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// run into serious performance issues, especially when it comes to large trees
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//
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// at least, we moved this to a job so it can run in a background thred
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// seems to improve the situation but not sure if final solution
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monitor.worked(1);
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monitor.subTask("Refreshing viewer");
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display.asyncExec(new Runnable() {
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public void run() {
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source.refresh();
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}
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});
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monitor.worked(1);
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monitor.done();
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return Status.OK_STATUS;
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}
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};
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job.setPriority(Job.SHORT);
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job.schedule();
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}
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}
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/**
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* @return
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*/
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private boolean isRelevant(CdmDataChangeMap changeEvents) {
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for(CdmDataChangeEvent event : changeEvents.getAllEvents()){
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EventType eventType = event.getEventType();
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CdmBase eventEntity = event.getEntity();
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// all poyltomous key changes are relevant
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if((eventType == EventType.INSERT || eventType == EventType.DELETE || eventType == EventType.UPDATE)
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&& eventEntity instanceof PolytomousKey){
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return true;
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}
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}
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return false;
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}
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}
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