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/*******************************************************************************
* Copyright (c) 2012, 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.rcp.ui.internal.structuremergeviewer.groups.impl;
import static org.eclipse.emf.compare.utils.EMFComparePredicates.ofKind;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import java.util.Collection;
import org.eclipse.emf.compare.Comparison;
import org.eclipse.emf.compare.DifferenceKind;
import org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.BasicDifferenceGroupImpl;
import org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroup;
import org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider;
import org.eclipse.emf.compare.scope.IComparisonScope;
/**
* This implementation of a {@link IDifferenceGroupProvider} will be used to group the differences by their
* {@link DifferenceKind kind} : additions, deletions, changes and moves.
*
* @author <a href="mailto:laurent.goubet@obeo.fr">Laurent Goubet</a>
* @since 3.0
*/
public class KindGroupProvider extends AbstractDifferenceGroupProvider {
/** A human-readable label for this group provider. This will be displayed in the EMF Compare UI. */
private String label;
/** The initial activation state of the group provider. */
private boolean activeByDefault;
/** The groups provided by this provider. */
private ImmutableList<IDifferenceGroup> differenceGroups;
/** The comparison object. */
private Comparison comp;
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider#getGroups(org.eclipse.emf.compare.Comparison)
*/
public Collection<? extends IDifferenceGroup> getGroups(Comparison comparison) {
if (differenceGroups == null || !comparison.equals(comp)) {
dispose();
this.comp = comparison;
final IDifferenceGroup additions = new BasicDifferenceGroupImpl(comparison, this,
ofKind(DifferenceKind.ADD), "Additions", getCrossReferenceAdapter());
final IDifferenceGroup deletions = new BasicDifferenceGroupImpl(comparison, this,
ofKind(DifferenceKind.DELETE), "Deletions", getCrossReferenceAdapter());
final IDifferenceGroup changes = new BasicDifferenceGroupImpl(comparison, this,
ofKind(DifferenceKind.CHANGE), "Changes", getCrossReferenceAdapter());
final IDifferenceGroup moves = new BasicDifferenceGroupImpl(comparison, this,
ofKind(DifferenceKind.MOVE), "Moves", getCrossReferenceAdapter());
Collection<IDifferenceGroup> groups = Lists.newArrayList();
if (!additions.getChildren().isEmpty()) {
groups.add(additions);
}
if (!deletions.getChildren().isEmpty()) {
groups.add(deletions);
}
if (!changes.getChildren().isEmpty()) {
groups.add(changes);
}
if (!moves.getChildren().isEmpty()) {
groups.add(moves);
}
differenceGroups = ImmutableList.copyOf(groups);
}
return differenceGroups;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider#getLabel()
*/
public String getLabel() {
return label;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider#setLabel(java.lang.String)
*/
public void setLabel(String label) {
this.label = label;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider#defaultSelected()
*/
public boolean defaultSelected() {
return activeByDefault;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider#setDefaultSelected(boolean)
*/
public void setDefaultSelected(boolean activeByDefault) {
this.activeByDefault = activeByDefault;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider#isEnabled(org
* .eclipse.emf.compare.scope.IComparisonScope, org.eclipse.emf.compare.Comparison)
*/
public boolean isEnabled(IComparisonScope scope, Comparison comparison) {
return true;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroupProvider#dispose()
*/
public void dispose() {
this.comp = null;
if (differenceGroups != null) {
for (IDifferenceGroup group : differenceGroups) {
group.dispose();
}
differenceGroups = null;
}
}
}
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