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/*******************************************************************************
* Copyright (c) 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 Feb 17, 2005
*
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
*/
package org.eclipse.jst.j2ee.navigator.internal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.IResourceDeltaVisitor;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jem.util.logger.proxy.Logger;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.SWTException;
/**
* @author Admin
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
public class EMFRootObjectProvider implements IResourceChangeListener, IResourceDeltaVisitor{
private final HashMap emfModelCache = new HashMap();
private final List listeners = new ArrayList();
public interface IRefreshHandlerListener {
void onRefresh(Object element);
}
/**
*
*/
public EMFRootObjectProvider() {
super();
ResourcesPlugin.getWorkspace().addResourceChangeListener(this);
}
public Object[] getModels(IProject project){
try {
EMFModelManager modelManager = (EMFModelManager) emfModelCache.get(project);
if (modelManager == null) {
synchronized (emfModelCache) {
modelManager= EMFModelManagerFactory.createEMFModelManager(project,this) ;
emfModelCache.put(project,modelManager);
}
}
return modelManager.getModels();
} catch (Exception ex) {
//ex.printStackTrace();
return null;
}
}
/* (non-Javadoc)
* @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(org.eclipse.core.resources.IResourceChangeEvent)
*/
public void resourceChanged(IResourceChangeEvent event) {
final IResourceDelta delta = event.getDelta();
if (delta != null) {
try {
delta.accept(EMFRootObjectProvider.this);
} catch (CoreException e) {
Logger.getLogger().logError(e);
} catch (SWTException swte) {
Logger.getLogger().logError(swte);
} catch (SWTError swte) {
Logger.getLogger().logError(swte);
}
}
}
/* (non-Javadoc)
* @see org.eclipse.core.resources.IResourceDeltaVisitor#visit(org.eclipse.core.resources.IResourceDelta)
*/
public boolean visit(IResourceDelta delta) throws CoreException {
IResource resource = delta.getResource();
if (resource != null) {
switch (resource.getType()) {
case IResource.ROOT :
return true;
case IResource.PROJECT :
boolean projectOpenStateChanged = ((delta.getFlags() & IResourceDelta.OPEN) != 0);
if (delta.getKind() == IResourceDelta.REMOVED || projectOpenStateChanged) {
IProject project = (IProject) resource;
dispose(project);
}
return false;
}
}
return false;
}
private void dispose(IProject project) {
if (project == null) return;
EMFModelManager modelManager = (EMFModelManager) emfModelCache.remove(project);
if (modelManager != null) {
modelManager.dispose();
modelManager = null;
}
}
public void dispose() {
ResourcesPlugin.getWorkspace().removeResourceChangeListener(this);
EMFModelManager modelManager = null;
Object[] keys = emfModelCache.keySet().toArray();
for (int i = 0; i < keys.length; i++) {
modelManager = (EMFModelManager) emfModelCache.remove(keys[i]);
if (modelManager != null) {
modelManager.dispose();
}
}
}
/**
* @param aProject
*/
public void notifyListeners(IProject aProject) {
for (int x = 0; x < listeners.size(); ++x) {
IRefreshHandlerListener refreshHandler = (IRefreshHandlerListener) listeners.get(x);
refreshHandler.onRefresh(aProject);
}
}
public void addRefreshHandlerListener(IRefreshHandlerListener aListener) {
synchronized (getListeners()) {
if (aListener != null && !getListeners().contains(aListener))
getListeners().add(aListener);
}
}
public void removeRefreshHandlerListener(IRefreshHandlerListener aListener) {
synchronized (listeners) {
listeners.remove(aListener);
}
}
/**
* Insert the method's description here. Creation date: (4/11/2001 4:42:58 PM)
*
* @return java.util.List
*/
protected java.util.List getListeners() {
return listeners;
}
}
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