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//--------------------------------------------------------------------------
//	Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
//  All rights reserved.
//
//	Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//	Redistributions of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.
//	Redistributions in binary form must reproduce the above copyright
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//	Neither the name of the Drew Davidson nor the names of its contributors
//  may be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
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//  DAMAGE.
//--------------------------------------------------------------------------
package com.feilong.lib.ognl;

public final class EvaluationPool extends Object{

    public EvaluationPool(){
        this(0);
    }

    public EvaluationPool(int initialSize){
        super();
        // do not init object pooling
    }

    /**
     * Returns an Evaluation that contains the node, source and whether it
     * is a set operation. If there are no Evaluation objects in the
     * pool one is created and returned.
     *
     * @param node
     *            a SimpleNode for an Evaluation to be created.
     * @param source
     *            a source Object for an Evaluation to be created.
     * @return an Evaluation based on the parameters.
     */
    public Evaluation create(SimpleNode node,Object source){
        return create(node, source, false);
    }

    /**
     * Returns an Evaluation that contains the node, source and whether it
     * is a set operation.
     *
     * @param node
     *            a SimpleNode for an Evaluation to be created.
     * @param source
     *            a source Object for an Evaluation to be created.
     * @param setOperation
     *            true to identify the Evaluation to be created as a set operation, false to identify it as a get operation.
     * @return an Evaluation based on the parameters.
     */
    public Evaluation create(SimpleNode node,Object source,boolean setOperation){
        // synchronization is removed as we do not rely anymore on the in-house object pooling
        return new Evaluation(node, source, setOperation);
    }

    /**
     * Recycles an of Evaluation and all of it's siblings
     * and children.
     *
     * @param value
     *            an Evaluation to be recycled along with its siblings (not used).
     * @deprecated object-pooling now relies on the jvm garbage collection
     */
    @Deprecated
    public void recycleAll(Evaluation value){
        // no need of recycling, we rely on the garbage collection efficiency
    }

}