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/*****************************************************************************
* Copyright (c) 2012 CEA LIST.
*
*
* 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:
* Vincent Lorenzo (CEA LIST) Vincent.Lorenzo@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.emf.compare.diff.check;
import java.util.Iterator;
import java.util.List;
import org.eclipse.emf.compare.FactoryException;
import org.eclipse.emf.compare.diff.engine.IMatchManager;
import org.eclipse.emf.compare.diff.engine.check.ReferencesCheck;
import org.eclipse.emf.compare.diff.metamodel.DiffGroup;
import org.eclipse.emf.compare.match.metamodel.Match2Elements;
import org.eclipse.emf.compare.match.metamodel.Match3Elements;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
/**
*
* This reference checker allows to ignore differences on features for the comparison
*
*/
public class PapyrusReferencesCheck extends ReferencesCheck {
/**
* the checker used to take in account the ignored features for the Diff
*/
private final FeaturesCheck checker;
/**
*
* Constructor.
*
* @param matchManager
* @param checker
* the checker used to take in account the ignored features for the Diff
*/
public PapyrusReferencesCheck(final IMatchManager matchManager, final FeaturesCheck checker) {
super(matchManager);
this.checker = checker;
}
/**
*
* @see org.eclipse.emf.compare.diff.engine.check.ReferencesCheck#shouldBeIgnored(org.eclipse.emf.ecore.EReference)
*
* @param reference
* @return
*/
@Override
protected boolean shouldBeIgnored(final EReference reference) {
boolean shouldBeIgnored = super.shouldBeIgnored(reference);
return shouldBeIgnored || this.checker.shouldBeIgnored(reference);
}
/**
* return <code>true</code> if the attribute should be ignored in this context
*
* @param reference
* a reference
* @param context
* the context of this reference
* @return
*/
protected boolean shouldBeIgnored(final EReference reference, final EObject context) {
return this.checker.shouldBeIgnored(reference, context);
}
/**
* Checks if there's been references updates in the model.<br/>
* <p>
* A reference is considered updated if its value(s) has been changed (either removal or addition of an element if the reference is multi-valued
* or update of a single-valued reference) between the left and the right model.
* </p>
*
* @param root
* {@link DiffGroup root} of the {@link DiffElement} to create.
* @param mapping
* Contains informations about the left and right model elements we have to compare.
* @throws FactoryException
* Thrown if we cannot fetch the references' values.
*/
public void checkReferencesUpdates(DiffGroup root, Match2Elements mapping) throws FactoryException {
final EClass eClass = mapping.getLeftElement().eClass();
final List<EReference> eclassReferences = eClass.getEAllReferences();
final Iterator<EReference> it = eclassReferences.iterator();
while(it.hasNext()) {
final EReference next = it.next();
if(!shouldBeIgnored(next, mapping.getLeftElement())) {
if(!shouldBeIgnored(next)) {
checkReferenceUpdates(root, mapping, next);
} else if(next.isContainment() && next.isOrdered()) {
checkContainmentReferenceOrderChange(root, mapping, next);
}
}
}
}
/**
* Checks if there's been references updates in the model.<br/>
* <p>
* A reference is considered updated if its value(s) has been changed (either removal or addition of an element if the reference is multi-valued
* or update of a single-valued reference) between the left and the ancestor model, the right and the ancestor or between the left and the right
* model.
* </p>
*
* @param root
* {@link DiffGroup root} of the {@link DiffElement} to create.
* @param mapping
* Contains informations about the left, right and origin model elements we have to compare.
* @throws FactoryException
* Thrown if we cannot fetch the references' values.
*/
public void checkReferencesUpdates(DiffGroup root, Match3Elements mapping) throws FactoryException {
// Ignores matchElements when they don't have origin (no updates on these)
if(mapping.getOriginElement() == null)
return;
final EClass eClass = mapping.getOriginElement().eClass();
final List<EReference> eclassReferences = eClass.getEAllReferences();
final Iterator<EReference> it = eclassReferences.iterator();
while(it.hasNext()) {
final EReference next = it.next();
if(!shouldBeIgnored(next, mapping.getLeftElement())) {
if(!shouldBeIgnored(next)) {
checkReferenceUpdates(root, mapping, next);
} else if(next.isContainment() && next.isOrdered()) {
checkContainmentReferenceOrderChange(root, mapping, next);
}
}
}
}
}
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