/**
* Helios, OpenSource Monitoring
* Brought to you by the Helios Development Group
*
* Copyright 2007, Helios Development Group and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*
*/
package org.helios.apmrouter.tsmodel;
import java.util.Comparator;
/**
* <p>Title: TierByLevelComparator</p>
* <p>Description: A comparator to sort {@link Tier}s by level </p>
* <p>Company: Helios Development Group LLC</p>
* @author Whitehead (nwhitehead AT heliosdev DOT org)
* <p><code>org.helios.apmrouter.tsmodel.TierByLevelComparator</code></p>
*/
public class TierByLevelComparator implements Comparator<Tier> {
/**
* Creates a new TierByLevelComparator, private since only 1 instance is needed
*/
private TierByLevelComparator() {}
/** The shared comparator instance */
public static final TierByLevelComparator INSTANCE = new TierByLevelComparator();
/**
* {@inheritDoc}
* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
*/
@Override
public int compare(Tier tier1, Tier tier2) {
if(tier1.level==tier2.level) return 0;
return tier1.level<tier2.level ? -1 : 0;
}
}