/*
* 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 org.apache.jetspeed.security.impl;
import java.util.ArrayList;
import java.util.List;
import java.util.prefs.Preferences;
import org.apache.jetspeed.security.HierarchyResolver;
import org.apache.jetspeed.util.ArgUtil;
/**
* <p>
* Implementation for "is a" hierarchy. For Example: if a user has the role
* [roleA.roleB.roleC] than
* </p>
* <code>user.getSubject().getPrincipals()</code> returns:
* <ul>
* <li>/role/roleA</li>
* <li>/role/roleA/roleB</li>
* <li>/role/roleA/roleB/roleC</li>
* </ul>
* </p>
*
* @author <a href="mailto:Artem.Grinshtein@t-systems.com">Artem Grinshtein </a>
* @version $Id: GeneralizationHierarchyResolver.java,v 1.2 2004/09/18 19:33:58
* dlestrat Exp $
*/
public class GeneralizationHierarchyResolver extends BaseHierarchyResolver implements HierarchyResolver
{
/**
* @see org.apache.jetspeed.security.HierarchyResolver#resolve(Preferences)
*/
public String[] resolve(Preferences prefs)
{
ArgUtil.notNull(new Object[] { prefs }, new String[] { "preferences" }, "resolve(java.util.prefs.Preferences)");
List list = new ArrayList();
Preferences preferences = prefs;
while ((preferences.parent() != null) && (preferences.parent().parent() != null))
{
list.add(preferences.absolutePath());
preferences = preferences.parent();
}
return (String[]) list.toArray(new String[0]);
}
}