/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Nam Nguyen
*/
package com.caucho.quercus.env;
import java.util.IdentityHashMap;
/*
* Holds reference indexes for serialization.
*/
public final class SerializeMap {
private IdentityHashMap<Value, Integer> _varMap
= new IdentityHashMap<Value, Integer>();
private int _index = 1;
public SerializeMap()
{
}
/*
* Increments the index of values.
*/
public void incrementIndex()
{
_index++;
}
/*
* Stores the position of this value in the serialization process.
*/
public void put(Value value)
{
_varMap.put(value, Integer.valueOf(_index));
}
/*
* Retrieves the position of this value in the serialization.
*/
public Integer get(Value value)
{
Integer index = _varMap.get(value);
if (index == null && value instanceof Var)
return _varMap.get(value.toValue());
return index;
}
}