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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TransforMiiX XSLT processor code.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* IBM Corporation
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef txResultRecycler_h__
#define txResultRecycler_h__
#include "nsCOMPtr.h"
#include "txStack.h"
class txAExprResult;
class StringResult;
class txNodeSet;
class txXPathNode;
class NumberResult;
class BooleanResult;
class txResultRecycler
{
public:
txResultRecycler();
~txResultRecycler();
nsresult init();
void AddRef()
{
++mRefCnt;
}
void Release()
{
if (--mRefCnt == 0) {
mRefCnt = 1; //stabilize
delete this;
}
}
/**
* Returns an txAExprResult to this recycler for reuse.
* @param aResult result to recycle
*/
void recycle(txAExprResult* aResult);
/**
* Functions to return results that will be fully used by the caller.
* Returns nsnull on out-of-memory and an inited result otherwise.
*/
nsresult getStringResult(StringResult** aResult);
nsresult getStringResult(const nsAString& aValue, txAExprResult** aResult);
nsresult getNodeSet(txNodeSet** aResult);
nsresult getNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);
nsresult getNodeSet(const txXPathNode& aNode, txAExprResult** aResult);
nsresult getNodeSet(const txXPathNode& aNode, txNodeSet** aResult);
nsresult getNumberResult(double aValue, txAExprResult** aResult);
/**
* Functions to return a txAExprResult that is shared across several
* clients and must not be modified. Never returns nsnull.
*/
void getEmptyStringResult(txAExprResult** aResult);
void getBoolResult(PRBool aValue, txAExprResult** aResult);
/**
* Functions that return non-shared resultsobjects
*/
nsresult getNonSharedNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);
private:
nsAutoRefCnt mRefCnt;
txStack mStringResults;
txStack mNodeSetResults;
txStack mNumberResults;
StringResult* mEmptyStringResult;
BooleanResult* mTrueResult;
BooleanResult* mFalseResult;
};
#endif //txResultRecycler_h__
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