/*******************************************************************************
* Copyright (c) 2009 Tasktop Technologies and others.
* 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:
* Tasktop Technologies - initial API and implementation
* Obeo - adaptation for Amalgamation, EMF based and no Mylyn dependency
* CEA LIST - adaptation to Papyrus
*******************************************************************************/
package org.eclipse.papyrus.infra.discovery.ui.internal.viewer;
import java.util.Comparator;
import org.eclipse.papyrus.infra.discovery.Category;
/**
* A comparator that orders categories by relevance and name.
*
* @author David Green
*/
public class DiscoveryCategoryComparator implements Comparator<Category> {
public int compare(Category o1, Category o2) {
if (o1 == o2) {
return 0;
}
Integer r1 = o1.getRelevance();
Integer r2 = o2.getRelevance();
int i;
if (r1 != null && r2 != null) {
// don't have to worry about format, since they were already
// validated
// note that higher relevance appears first, thus the reverse order
// of
// the comparison.
i = new Integer(r2).compareTo(new Integer(r1));
} else if (r1 == null) {
return 1;
} else {
return -1;
}
if (i == 0) {
i = o1.getName().compareToIgnoreCase(o2.getName());
if (i == 0) {
i = o1.getName().compareTo(o2.getName());
}
}
return i;
}
}