AspectsByDisplayNameComparator.java

/**
 * This file is part of Archiv-Editor.
 * 
 * The software Archiv-Editor serves as a client user interface for working with
 * the Person Data Repository. See: pdr.bbaw.de
 * 
 * The software Archiv-Editor was developed at the Berlin-Brandenburg Academy
 * of Sciences and Humanities, Jägerstr. 22/23, D-10117 Berlin.
 * www.bbaw.de
 * 
 * Copyright (C) 2010-2013  Berlin-Brandenburg Academy
 * of Sciences and Humanities
 * 
 * The software Archiv-Editor was developed by @author: Christoph Plutte.
 * 
 * Archiv-Editor 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 3 of the License, or
 * (at your option) any later version.
 * 
 * Archiv-Editor 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 Archiv-Editor.  
 * If not, see <http://www.gnu.org/licenses/lgpl-3.0.html>.
 */
package org.bbaw.pdr.ae.control.comparator;

import java.util.Comparator;

import org.bbaw.pdr.ae.model.Aspect;

/**
 * Comparator for Aspect objects according to display names (case insensitive).
 * @author Christoph Plutte
 */
public class AspectsByDisplayNameComparator implements Comparator<Aspect>
{

	@Override
	public final int compare(final Aspect a1, final Aspect a2)
	{
		// System.out.println("a1 " + a1.getDisplayName());
		// System.out.println("a2 " + a2.getDisplayName());

		if (a1 != null && a2 != null)
		{
			return a1.getDisplayName().compareToIgnoreCase(a2.getDisplayName());
		}
		else if (a1 != null)
		{
			return -1;
		}
		else if (a2 != null)
		{
			return 1;
		}
		else
		{
			return 0;
		}

	}

}