/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
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* distribution.
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* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
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* 4. The name "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
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* 5. Products derived from this software may not be called "Apache",
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package org.apache.ws.jaxme.generator.util;
import java.util.Comparator;
import javax.xml.namespace.QName;
import org.apache.ws.jaxme.generator.QNameOwner;
/** <p>Used for sorting arrays or lists of QNameOwner's.</p>
*
* @author <a href="mailto:joe@ispsoft.de">Jochen Wiedmann</a>
* @version $Id: QNameComparator.java 231559 2003-09-23 12:37:47Z jochen $
*/
public class QNameComparator implements Comparator {
private static final QNameComparator theInstance = new QNameComparator();
protected QNameComparator() {}
public static QNameComparator getInstance() { return theInstance; }
/** <p>Compares two instances of <code>QNameOwner</code> by
* calling their <code>getQName()</code> method.</p>
*
* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
* @see org.apache.ws.jaxme.generator.QNameOwner#getQName()
*/
public int compare(Object o1, Object o2) {
if (o1 == null) {
return o2 == null ? 0 : -1;
}
if (o2 == null) {
return 1;
}
QNameOwner qo1 = (QNameOwner) o1;
QNameOwner qo2 = (QNameOwner) o2;
QName n1 = qo1.getQName();
QName n2 = qo2.getQName();
if (n1 == null) {
return n2 == null ? 0 : -1;
}
if (n2 == null) {
return 1;
}
String s1 = n1.getNamespaceURI();
String s2 = n2.getNamespaceURI();
if (s1 == null) { s1 = ""; }
if (s2 == null) { s2 = ""; }
int result = s1.compareTo(s2);
if (result == 0) {
result = n1.getLocalPart().compareTo(n2.getLocalPart());
}
return result;
}
}