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/***************************************************************************
* Copyright (c) 2004 - 2007 Eike Stepper, Germany.
* 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.emf.internal.cdo;
import org.eclipse.emf.cdo.CDOView;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.CDOAware;
import org.eclipse.emf.ecore.impl.CDOCallback;
import org.eclipse.emf.ecore.impl.EObjectImpl;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.internal.cdo.bundle.OM;
import org.eclipse.emf.internal.cdo.util.FSMUtil;
import java.util.List;
/**
* @author Eike Stepper
*/
public class CDOCallbackImpl extends CDOLegacyImpl implements CDOCallback
{
public CDOCallbackImpl(InternalEObject instance)
{
this.instance = instance;
}
public void beforeRead(EObjectImpl instance)
{
CDOStateMachine.INSTANCE.read(this);
}
public void beforeWrite(EObjectImpl instance)
{
CDOStateMachine.INSTANCE.write(this);
}
@Override
public boolean isAdapterForType(Object type)
{
return type == CDOCallbackImpl.class;
}
public void notifyChanged(Notification msg)
{
try
{
if (msg.getNotifier() == instance)
{
Object feature = msg.getFeature();
if (feature instanceof EReference)
{
EReference reference = (EReference)feature;
if (reference.isContainment() && !reference.isTransient())
{
switch (msg.getEventType())
{
case Notification.ADD:
notifyAdd(msg.getNewValue());
break;
case Notification.ADD_MANY:
notifyAddMany(msg);
break;
case Notification.REMOVE:
notifyRemove(msg.getOldValue());
break;
case Notification.REMOVE_MANY:
notifyRemoveMany(msg);
break;
}
}
}
}
}
catch (RuntimeException ex)
{
OM.LOG.error(ex);
}
}
@Override
protected void adjustEProxy()
{
// Do nothing
}
private void notifyAddMany(Notification msg)
{
List<?> newValues = (List<?>)msg.getNewValue();
List<?> oldValues = (List<?>)msg.getOldValue();
for (Object newValue : newValues)
{
if (!oldValues.contains(newValue))
{
notifyAdd(newValue);
}
}
}
private void notifyAdd(Object instance)
{
if (instance instanceof InternalEObject)
{
if (((InternalEObject)instance).eDeliver())
{
InternalCDOObject object = FSMUtil.adapt(instance, view);
CDOStateMachine.INSTANCE.attach(object, cdoResource(), view);
}
}
}
private void notifyRemoveMany(Notification msg)
{
List<?> newValues = (List<?>)msg.getNewValue();
List<?> oldValues = (List<?>)msg.getOldValue();
for (Object oldValue : oldValues)
{
if (!newValues.contains(oldValue))
{
notifyRemove(oldValue);
}
}
}
private void notifyRemove(Object instance)
{
if (instance instanceof InternalEObject)
{
if (((InternalEObject)instance).eDeliver())
{
InternalCDOObject object = FSMUtil.adapt(instance, view);
CDOStateMachine.INSTANCE.detach(object, cdoResource(), view);
}
}
}
public static InternalCDOObject adapt(Object object, CDOView view) throws Throwable
{
if (object instanceof CDOAware)
{
CDOAware aware = (CDOAware)object;
CDOCallbackImpl callback = (CDOCallbackImpl)aware.getCDOCallback();
if (callback == null)
{
InternalEObject instance = (InternalEObject)aware;
if (instance.eIsProxy())
{
instance = (InternalEObject)EcoreUtil.resolve(instance, view.getResourceSet());
}
callback = new CDOCallbackImpl(instance);
aware.setCDOCallback(callback);
instance.eAdapters().add(callback);
}
return callback;
}
return null;
}
}
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