/*
JSPWiki - a JSP-based WikiWiki clone.
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
*/
package com.ecyrd.jspwiki.auth;
import java.io.Serializable;
import java.security.Principal;
import java.text.Collator;
import java.util.Comparator;
/**
* Comparator class for sorting objects of type Principal.
* Used for sorting arrays or collections of Principals.
* @since 2.3
*/
public class PrincipalComparator
implements Comparator<Principal>, Serializable
{
private static final long serialVersionUID = 1L;
/**
* Compares two Principal objects.
* @param o1 the first Principal
* @param o2 the second Principal
* @return the result of the comparison
* @see java.util.Comparator#compare(Object, Object)
*/
public int compare( Principal o1, Principal o2 )
{
Collator collator = Collator.getInstance();
return collator.compare( o1.getName(), o2.getName() );
}
}