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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.rcp.ui.structuremergeviewer.filters;
import static org.eclipse.emf.compare.utils.EMFComparePredicates.ofKind;
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.scope.IComparisonScope;
import org.eclipse.emf.ecore.EObject;
/**
* A filter used by default that filtered out removed elements.
*
* @author <a href="mailto:axel.richard@obeo.fr">Axel Richard</a>
* @since 3.0
*/
public class RemovedElementsFilter implements IDifferenceFilter {
/** A human-readable label for this filter. This will be displayed in the EMF Compare UI. */
private String label;
/** The initial activation state of the filter. */
private boolean activeByDefault;
/** The Predicate activate through this action. */
private Predicate<? super EObject> predicate;
/**
* Constructs the filter with the appropriate predicate.
*/
public RemovedElementsFilter() {
super();
setPredicate();
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.structuremergeviewer.filters.IDifferenceFilter#getLabel()
*/
public String getLabel() {
return label;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.structuremergeviewer.filters.IDifferenceFilter#setLabel(java.lang.String)
*/
public void setLabel(String label) {
this.label = label;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.structuremergeviewer.filters.IDifferenceFilter#defaultSelected()
*/
public boolean defaultSelected() {
return activeByDefault;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.structuremergeviewer.filters.IDifferenceFilter#setDefaultSelected(boolean)
*/
public void setDefaultSelected(boolean activeByDefault) {
this.activeByDefault = activeByDefault;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.ui.structuremergeviewer.filters.IDifferenceFilter#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.structuremergeviewer.filters.IDifferenceFilter#getPredicate()
*/
public Predicate<? super EObject> getPredicate() {
return predicate;
}
/**
* Set the predicate that will be activate through this filter.
*/
private void setPredicate() {
final Predicate<? super EObject> actualPredicate = new Predicate<EObject>() {
public boolean apply(EObject input) {
return input instanceof Diff && ofKind(DifferenceKind.DELETE).apply((Diff)input);
}
};
predicate = actualPredicate;
}
}
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