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/*******************************************************************************
* Copyright (c) 2006, 2011 Obeo.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.papyrus.infra.emf.compare.merger;
import java.util.List;
import org.eclipse.emf.compare.EMFComparePlugin;
import org.eclipse.emf.compare.FactoryException;
import org.eclipse.emf.compare.diff.merge.DefaultMerger;
import org.eclipse.emf.compare.diff.metamodel.AttributeChangeLeftTarget;
import org.eclipse.emf.compare.util.EFactory;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EObject;
/**
* Merger for an {@link AttributeChangeLeftTarget} operation.<br/>
* <p>
* Are considered for this merger :
* <ul>
* <li>{@link RemoveAttribute}</li>
* <li>{@link RemoteAddAttribute}</li>
* </ul>
* </p>
*
* @author <a href="mailto:laurent.goubet@obeo.fr">Laurent Goubet</a>
*/
public class AttributeChangeLeftTargetMerger extends DefaultMerger {
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.diff.merge.api.AbstractMerger#doApplyInOrigin()
*/
@Override
public void doApplyInOrigin() {
final AttributeChangeLeftTarget theDiff = (AttributeChangeLeftTarget)this.diff;
final EObject origin = theDiff.getLeftElement();
final Object value = theDiff.getLeftTarget();
final EAttribute attr = theDiff.getAttribute();
try {
EFactory.eRemove(origin, attr.getName(), value);
} catch (FactoryException e) {
EMFComparePlugin.log(e, true);
}
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.diff.merge.api.AbstractMerger#doUndoInTarget()
*/
@Override
public void doUndoInTarget() {
final AttributeChangeLeftTarget theDiff = (AttributeChangeLeftTarget)this.diff;
final EObject target = theDiff.getRightElement();
final Object value = theDiff.getLeftTarget();
final EAttribute attr = theDiff.getAttribute();
try {
int valueIndex = -1;
if (attr.isMany()) {
final EObject leftElement = theDiff.getLeftElement();
final Object leftValues = leftElement.eGet(attr);
if (leftValues instanceof List) {
final List leftValuesList = (List)leftValues;
valueIndex = leftValuesList.indexOf(value);
}
}
EFactory.eAdd(target, attr.getName(), value, valueIndex);
} catch (FactoryException e) {
EMFComparePlugin.log(e, true);
}
}
}
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