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/*******************************************************************************
* Copyright (c) 2013 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.emf.compare.diagram.internal.factories.extensions;
import com.google.common.base.Predicate;
import org.eclipse.emf.compare.Comparison;
import org.eclipse.emf.compare.Diff;
import org.eclipse.emf.compare.DifferenceKind;
import org.eclipse.emf.compare.ResourceAttachmentChange;
import org.eclipse.emf.compare.diagram.internal.extensions.DiagramChange;
import org.eclipse.emf.compare.diagram.internal.extensions.DiagramDiff;
import org.eclipse.emf.compare.diagram.internal.extensions.ExtensionsFactory;
import org.eclipse.emf.compare.diagram.internal.factories.AbstractDiagramChangeFactory;
import org.eclipse.emf.compare.utils.MatchUtil;
import org.eclipse.emf.compare.utils.ReferenceUtil;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.gmf.runtime.notation.NotationPackage;
/**
* Factory of diagram changes.
*
* @author <a href="mailto:cedric.notot@obeo.fr">Cedric Notot</a>
*/
public class DiagramChangeFactory extends AbstractDiagramChangeFactory {
/**
* Constructor.
*/
public DiagramChangeFactory() {
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.internal.postprocessor.factories.AbstractChangeFactory#getExtensionKind()
*/
@Override
public Class<? extends Diff> getExtensionKind() {
return DiagramChange.class;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.internal.postprocessor.factories.AbstractChangeFactory#createExtension()
*/
@Override
public DiagramDiff createExtension() {
return ExtensionsFactory.eINSTANCE.createDiagramChange();
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.internal.postprocessor.factories.AbstractChangeFactory#setRefiningChanges(org.eclipse.emf.compare.diagram.internal.extensions.DiagramDiff,
* org.eclipse.emf.compare.DifferenceKind, org.eclipse.emf.compare.Diff)
*/
@Override
public void setRefiningChanges(Diff extension, DifferenceKind extensionKind, Diff refiningDiff) {
// Macroscopic change on a diagram is refined by the unit main change and all unit children related
// changes.
extension.getRefinedBy().add(refiningDiff);
extension.getRefinedBy().addAll(getAllContainedDifferences(refiningDiff));
}
/**
* {@inheritDoc}
* @see org.eclipse.emf.compare.internal.postprocessor.factories.AbstractChangeFactory#fillRequiredDifferences(org.eclipse.emf.compare.Comparison, org.eclipse.emf.compare.Diff)
*/
@Override
public void fillRequiredDifferences(Comparison comparison, Diff extension) {
// nothing
}
/**
* Predicate to check that the given difference is the main unit difference for this macroscopic add or
* delete of diagram.
*
* @return The predicate.
*/
public static Predicate<Diff> isMainDiffForAddOrDeleteDiagram() {
return new Predicate<Diff>() {
public boolean apply(Diff difference) {
return difference instanceof ResourceAttachmentChange
&& (isRelatedToAnAddDiagram((ResourceAttachmentChange)difference) || isRelatedToADeleteDiagram((ResourceAttachmentChange)difference));
}
};
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.internal.postprocessor.factories.AbstractChangeFactory#isRelatedToAnExtensionAdd(org.eclipse.emf.compare.ResourceAttachmentChange)
*/
@Override
protected boolean isRelatedToAnExtensionAdd(ResourceAttachmentChange input) {
return isRelatedToAnAddDiagram(input);
}
/**
* It checks that the given resource attachment change concerns the add of a diagram.
*
* @param input
* The reference change.
* @return True if it concerns the add of a node, False otherwise.
*/
protected static boolean isRelatedToAnAddDiagram(ResourceAttachmentChange input) {
return isContainmentOnSemanticDiagram(input) && input.getKind() == DifferenceKind.ADD;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.internal.postprocessor.factories.AbstractChangeFactory#isRelatedToAnExtensionDelete(org.eclipse.emf.compare.ResourceAttachmentChange)
*/
@Override
protected boolean isRelatedToAnExtensionDelete(ResourceAttachmentChange input) {
return isRelatedToADeleteDiagram(input);
}
/**
* It checks that the given resource attachment change concerns the delete of a diagram.
*
* @param input
* The reference change.
* @return True if it concerns the delete of a node, False otherwise.
*/
protected static boolean isRelatedToADeleteDiagram(ResourceAttachmentChange input) {
return isContainmentOnSemanticDiagram(input) && input.getKind() == DifferenceKind.DELETE;
}
/**
* It checks that the given difference is on a containment link to a Diagram attached to a semantic
* object.
*
* @param input
* The difference.
* @return True if the difference matches with the predicate.
*/
private static boolean isContainmentOnSemanticDiagram(ResourceAttachmentChange input) {
EObject value = MatchUtil.getContainer(input.getMatch().getComparison(), input);
return value instanceof Diagram
&& ReferenceUtil.safeEGet(value, NotationPackage.Literals.VIEW__ELEMENT) != null;
}
}
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