/*
 * Copyright 2002-2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * XSEC
 *
 * TXFMChain := List class that holds and manipulates a chain of TXFM 
 *              objects.
 *
 * Author(s): Berin Lautenbach
 *
 * $Id: TXFMChain.hpp 351214 2005-02-03 13:58:14Z milan $
 *
 */

#ifndef TXFMCHAIN_INCLUDE
#define TXFMCHAIN_INCLUDE

#include <xsec/framework/XSECDefs.hpp>

class TXFMBase;


/**
 * \brief A holder class to take care of a chain of internal
 * transformer objects.
 * @ingroup internal
 */


class DSIG_EXPORT TXFMChain {

public:

	// Constructors/destructors

	TXFMChain(TXFMBase * baseTxfm, bool deleteChainWhenDone = true);
	~TXFMChain();

	// Manipulate
	void appendTxfm(TXFMBase * txfm);
	TXFMBase * getLastTxfm(void);

private:

	TXFMChain();
	TXFMChain(TXFMChain &toCopy);

	TXFMBase				* mp_currentTxfm;
	bool					m_deleteChainWhenDone;

	void deleteTXFMChain(TXFMBase * toDelete);

};

inline
TXFMBase * TXFMChain::getLastTxfm(void) {return mp_currentTxfm;}



#endif /* TXFMCHAIN_INCLUDE */