/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-06 Wolfgang M. Meier
* wolfgang@exist-db.org
* http://exist.sourceforge.net
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.util.hashtable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.exist.dom.QName;
/**
* @author Pieter Deelen
*/
public class NamePool {
private ConcurrentMap pool;
public NamePool() {
pool = new ConcurrentHashMap();
}
public QName getSharedName(QName name) {
QName sharedName = (QName)pool.putIfAbsent(name, name);
if (sharedName == null) {
// The name was not in the pool, return the name just added.
return name;
} else {
// The name was in the pool, return the shared name.
return sharedName;
}
}
}