/*
 * 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
 *
 * TXFMEnvelope := Class that calculates an Envelope with an XPath evaluator
 *
 * $Id: TXFMEnvelope.hpp 351214 2005-02-03 13:58:14Z milan $
 *
 */

#include <xsec/transformers/TXFMBase.hpp>
#include <xsec/utils/XSECSafeBuffer.hpp>
#include <xsec/canon/XSECC14n20010315.hpp>
#include <xsec/utils/XSECSafeBufferFormatter.hpp>

// Xerces

#include <xercesc/dom/DOM.hpp>

/**
 * \brief Transformer to handle envelope transforms
 * @ingroup internal
 */

class DSIG_EXPORT TXFMEnvelope : public TXFMBase {

private:

	XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument	* mp_document;
	XERCES_CPP_NAMESPACE_QUALIFIER DOMNode		* mp_startNode;

public:

	TXFMEnvelope(XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *doc);
	~TXFMEnvelope();

	// Methods to set the inputs

	void setInput(TXFMBase *newInput);
	
	// Methods to get tranform output type and input requirement

	virtual TXFMBase::ioType getInputType(void);
	virtual TXFMBase::ioType getOutputType(void);
	virtual TXFMBase::nodeType getNodeType(void);

	// Envelope unique

	void evaluateEnvelope(XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *t);

	// Methods to get output data

	virtual unsigned int readBytes(XMLByte * const toFill, const unsigned int maxToFill);
	virtual XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *getDocument();
	virtual XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *getFragmentNode();
	virtual const XMLCh * getFragmentId();
	virtual XSECXPathNodeList	& getXPathNodeList();
private:
	TXFMEnvelope();
};