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/*******************************************************************************
* Copyright (c) 2003, 2005 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
/*
* Created on Apr 1, 2003
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package org.eclipse.wst.common.internal.emf.utilities;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
/**
* @author DABERG
*
* To change the template for this generated type comment go to Window>Preferences>Java>Code
* Generation>Code and Comments
*/
public class IsLoadingProxyAdapter extends AdapterImpl {
private Resource resource;
private Adapter targetAdapter;
private EObject targetObject;
public IsLoadingProxyAdapter(Adapter aTargetAdapter, EObject aTargetObject) {
targetAdapter = aTargetAdapter;
targetObject = aTargetObject;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.emf.common.notify.impl.AdapterImpl#notifyChanged(org.eclipse.emf.common.notify.Notification)
*/
public void notifyChanged(Notification msg) {
if (resource != null) {
//listen for the remove of the loading adapter
if (msg.getFeatureID(null) == Resource.RESOURCE__IS_LOADED && msg.getEventType() == Notification.SET) {
removeProxySupport();
reset();
}
} else if (cacheResource()) {
targetAdapter.notifyChanged(msg);
reset();
}
}
/**
* Cache the resource variable and return true if we removed the proxy support.
*/
private boolean cacheResource() {
if (getTarget() != null) {
EObject eObj = (EObject) getTarget();
resource = eObj.eResource();
if (resource != null) {
eObj.eAdapters().remove(this);
if (ExtendedEcoreUtil.isLoading(resource))
resource.eAdapters().add(this);
else {
targetObject.eAdapters().add(targetAdapter);
return true;
}
}
}
return false;
}
/**
*
*/
private void removeProxySupport() {
getTarget().eAdapters().remove(this);
targetObject.eAdapters().add(targetAdapter);
}
private void reset() {
resource = null;
targetAdapter = null;
targetObject = null;
}
}
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