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/*****************************************************************************
* Copyright (c) 2013 CEA LIST.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* CEA LIST - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.cdo.core.resource;
import java.io.IOException;
import org.eclipse.emf.cdo.dawn.gmf.util.DawnDiagramUpdater;
import org.eclipse.emf.cdo.util.CDOUtil;
import org.eclipse.emf.cdo.view.CDOView;
import org.eclipse.emf.cdo.view.CDOViewInvalidationEvent;
import org.eclipse.emf.cdo.view.CDOViewSet;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.net4j.util.event.IEvent;
import org.eclipse.net4j.util.event.IListener;
import org.eclipse.papyrus.cdo.core.IPapyrusRepository;
import org.eclipse.papyrus.cdo.core.IPapyrusRepositoryManager;
import org.eclipse.papyrus.cdo.internal.core.CDOUtils;
import org.eclipse.papyrus.infra.core.resource.ModelMultiException;
import org.eclipse.papyrus.infra.services.resourceloading.OnDemandLoadingModelSet;
import com.google.common.collect.Iterables;
/**
* This is the CDOAwareModelSet type. Enjoy.
*/
public class CDOAwareModelSet extends OnDemandLoadingModelSet {
private final ThreadLocal<Boolean> inGetResource = new ThreadLocal<Boolean>();
private final IPapyrusRepositoryManager repositoryManager;
private IPapyrusRepository repository;
private IListener invalidationListener;
public CDOAwareModelSet(IPapyrusRepositoryManager repositoryManager) {
super();
setTrackingModification(false);
this.repositoryManager = repositoryManager;
}
@Override
public EObject getEObject(URI uri, boolean loadOnDemand) {
return CDOUtils.isCDOURI(uri) ? basicGetEObject(uri, loadOnDemand) : super.getEObject(uri, loadOnDemand);
}
protected EObject basicGetEObject(URI uri, boolean loadOnDemand) {
Resource resource = getResource(uri.trimFragment(), loadOnDemand);
return (resource == null) ? null : resource.getEObject(uri.fragment());
}
@Override
public Resource getResource(URI uri, boolean loadOnDemand) {
Boolean oldValue = inGetResource.get();
inGetResource.set(Boolean.TRUE);
try {
return super.getResource(uri, loadOnDemand);
} finally {
inGetResource.set(oldValue);
}
}
boolean isInGetResource() {
return inGetResource.get() == Boolean.TRUE;
}
@Override
public Resource createResource(URI uri, String contentType) {
initTransaction(uri);
return super.createResource(uri, contentType);
}
@Override
protected void demandLoad(Resource resource) throws IOException {
if(CDOUtils.isCDOURI(resource.getURI())) {
// XML options not applicable to CDO resources
resource.load(null);
resourceLoadedHook(resource);
} else {
super.demandLoad(resource);
}
}
protected void resourceLoadedHook(Resource resource) {
for(Diagram next : Iterables.filter(resource.getContents(), Diagram.class)) {
DawnDiagramUpdater.initializeElement(next);
}
}
public CDOView getCDOView() {
CDOViewSet viewSet = CDOUtil.getViewSet(this);
CDOView[] views = (viewSet == null) ? null : viewSet.getViews();
return ((views != null) && (views.length > 0)) ? views[0] : null;
}
@Override
public void createModels(URI newURI) {
initTransaction(newURI);
super.createModels(newURI);
}
@Override
public void loadModels(URI uri) throws ModelMultiException {
initTransaction(uri);
super.loadModels(uri);
}
protected void initTransaction(URI uri) {
if(getCDOView() == null) {
// get the repository and start a transaction on it
if(repository == null) {
repository = repositoryManager.getRepositoryForURI(uri);
}
if(repository != null) {
repository.createTransaction(this);
CDOView view = getCDOView();
if(view != null) {
view.addListener(getInvalidationListener());
}
}
}
}
@Override
public void unload() {
if((repository != null) && (getCDOView() != null)) {
CDOView view = getCDOView();
if(view != null) {
view.removeListener(getInvalidationListener());
}
invalidationListener = null;
// dispose the transaction
repository.close(this);
}
repository = null;
super.unload();
}
protected final IListener getInvalidationListener() {
if(invalidationListener == null) {
invalidationListener = createInvalidationListener();
}
return invalidationListener;
}
protected IListener createInvalidationListener() {
return new IListener() {
public void notifyEvent(IEvent event) {
if(event instanceof CDOViewInvalidationEvent) {
TransactionalEditingDomain domain = getTransactionalEditingDomain();
if(domain instanceof CDOAwareTransactionalEditingDomain) {
((CDOAwareTransactionalEditingDomain)domain).fireResourceSetChanged((CDOViewInvalidationEvent)event);
}
}
}
};
}
}
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