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jeremybenn |
/* ByteArrayComparator.java --
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.CORBA;
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import java.util.Comparator;
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/**
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* A byte array comparator for mapping with CORBA object keys.
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*
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* @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
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*/
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public class ByteArrayComparator
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implements Comparator
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{
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/**
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* Compare arrays first by absolute equality, then by length
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* and then (byte to byte) by content.
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*
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* @return 0 if arrays are equal, some comparison value otherwise.
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*/
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public int compare(Object an_a, Object a_b)
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{
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if (an_a == a_b)
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return 0;
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byte[] a = null;
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byte[] b = null;
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try
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{
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a = (byte[]) an_a;
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b = (byte[]) a_b;
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}
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catch (Exception ex)
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{
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throw new InternalError(an_a.getClass().getName() + "," +
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a_b.getClass().getName()
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);
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}
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if (a.length != b.length)
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return a.length - b.length;
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else
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{
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// The array sizes must be equal.
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for (int i = 0; i < b.length; i++)
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{
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if (a [ i ] != b [ i ])
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return a [ i ] - b [ i ];
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}
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}
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return 0;
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}
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}
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