/* Copyright (C) 2005-2009 Alfresco Software Limited.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program 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 General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 * As a special exception to the terms and conditions of version 2.0 of 
 * the GPL, you may redistribute this Program in connection with Free/Libre 
 * and Open Source Software ("FLOSS") applications as described in Alfresco's 
 * FLOSS exception.  You should have recieved a copy of the text describing 
 * the FLOSS exception, and it is also available here: 
 * http://www.alfresco.com/legal/licensing"
 */

package org.alfresco.service.namespace;

import java.util.Collection;

import org.alfresco.util.OneToManyHashBiMap;

/**
 * A basic implementation of the NamespaceService interface intended for use in
 * unit tests. This implementation does not persist any changes beyond the
 * lifetime of the object.
 * 
 * @author Nick Smith
 */
public class NamespaceServiceMemoryImpl implements NamespaceService
{
    // URI to Prefix map.
    private final OneToManyHashBiMap<String, String> map = new OneToManyHashBiMap<String, String>();

    public void registerNamespace(String prefix, String uri)
    {
        map.putSingleValue(uri, prefix);
    }

    public void unregisterNamespace(String prefix)
    {
        map.removeValue(prefix);
    }

    public String getNamespaceURI(String prefix) throws NamespaceException
    {
        return map.getKey(prefix);
    }

    public Collection<String> getPrefixes(String namespaceURI) throws NamespaceException
    {
        return map.get(namespaceURI);
    }

    public Collection<String> getPrefixes()
    {
        return map.flatValues();
    }

    public Collection<String> getURIs()
    {
        return map.keySet();
    }

}