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/**
* Copyright (c) 2004 - 2009 Eike Stepper (Berlin, Germany) 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:
* Simon McDuff - initial API and implementation
* Eike Stepper - maintenance
*/
package org.eclipse.emf.cdo.transaction;
import org.eclipse.emf.cdo.CDOIDDangling;
import org.eclipse.emf.cdo.CDOObject;
import org.eclipse.emf.cdo.common.revision.delta.CDOAddFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDOClearFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDOContainerFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDeltaVisitor;
import org.eclipse.emf.cdo.common.revision.delta.CDOListFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDOMoveFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDORemoveFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDOSetFeatureDelta;
import org.eclipse.emf.cdo.common.revision.delta.CDOUnsetFeatureDelta;
import org.eclipse.emf.cdo.eresource.CDOResource;
import org.eclipse.emf.internal.cdo.util.FSMUtil;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.spi.cdo.InternalCDOObject;
import java.util.List;
/**
* @author Simon McDuff
* @since 2.0
*/
public class CDOAutoAttacher extends CDODefaultTransactionHandler
{
private CDOTransaction transaction;
public CDOAutoAttacher(CDOTransaction transaction)
{
this.transaction = transaction;
transaction.addHandler(this);
}
public CDOTransaction getTransaction()
{
return transaction;
}
@Override
public void attachingObject(CDOTransaction transaction, CDOObject object)
{
if (object instanceof CDOResource)
{
return;
}
// Persist the graph as well.
handle(object, object);
}
@Override
public void modifyingObject(CDOTransaction transaction, CDOObject object, CDOFeatureDelta featureChange)
{
if (object instanceof CDOResource)
{
return;
}
if (featureChange != null)
{
CDOFeatureDeltaVisitorAutoAttach featureChangeVisitor = new CDOFeatureDeltaVisitorAutoAttach(object);
featureChange.accept(featureChangeVisitor);
}
}
protected void persist(EObject res, Object object)
{
if (!(object instanceof CDOResource) && object instanceof InternalCDOObject)
{
InternalCDOObject cdoObject = (InternalCDOObject)object;
if (FSMUtil.isTransient(cdoObject))
{
res.eResource().getContents().add(cdoObject);
}
}
else if (object instanceof CDOIDDangling)
{
CDOIDDangling cdoIDDangling = (CDOIDDangling)object;
res.eResource().getContents().add(cdoIDDangling.getTarget());
}
}
private void check(EObject referrer, EReference reference, EObject element)
{
if (element != null && element.eResource() == null)
{
if (reference != null && reference.isContainment())
{
handle(referrer, element);
}
else
{
persist(referrer, element);
}
}
}
@SuppressWarnings("unchecked")
private void handle(EObject referrer, EObject eObject)
{
for (EReference reference : eObject.eClass().getEAllReferences())
{
if (reference.isMany())
{
List<EObject> list = (List<EObject>)eObject.eGet(reference);
for (EObject element : list)
{
check(referrer, reference, element);
}
}
else
{
check(referrer, reference, (EObject)eObject.eGet(reference));
}
}
}
/**
* @author Simon McDuff
* @since 2.0
*/
private class CDOFeatureDeltaVisitorAutoAttach implements CDOFeatureDeltaVisitor
{
private EObject referrer;
public CDOFeatureDeltaVisitorAutoAttach(EObject referrer)
{
this.referrer = referrer;
}
public void visit(CDOAddFeatureDelta featureChange)
{
persist(referrer, featureChange.getValue());
}
public void visit(CDOClearFeatureDelta featureChange)
{
}
public void visit(CDOListFeatureDelta featureChange)
{
}
public void visit(CDOMoveFeatureDelta featureChange)
{
}
public void visit(CDORemoveFeatureDelta featureChange)
{
}
public void visit(CDOSetFeatureDelta featureChange)
{
persist(referrer, featureChange.getValue());
}
public void visit(CDOUnsetFeatureDelta featureChange)
{
}
public void visit(CDOContainerFeatureDelta featureChange)
{
}
}
}
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