/*
 * The Apache Software License, Version 1.1
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 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
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 *        Apache Software Foundation (http://www.apache.org/)."
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
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 * originally based on software copyright (c) 2001, Institute for
 * Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
 * The development of this software was partly funded by the European 
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/*
 * XSEC
 *
 * TXFMXSL := Class that performs XML Stylesheet Language transforms
 *
 * Author(s): Berin Lautenbach
 *
 * $Id: TXFMXSL.hpp,v 1.5 2003/03/02 08:21:02 blautenb Exp $
 *
 */

#include <xsec/transformers/TXFMBase.hpp>

// Xerces

#include <xercesc/dom/DOM.hpp>

// Xalan

#ifndef XSEC_NO_XPATH

#include <XalanDOM/XalanDocument.hpp>
#include <XercesParserLiaison/XercesDocumentBridge.hpp>
#include <XercesParserLiaison/XercesDOMSupport.hpp>
#include <XercesParserLiaison/XercesParserLiaison.hpp>
#include <XPath/NodeRefList.hpp>
#include <XPath/ElementPrefixResolverProxy.hpp>
#include <XalanTransformer/XalanTransformer.hpp>

// Xalan Namespace usage
XALAN_USING_XALAN(XercesDOMSupport)
XALAN_USING_XALAN(XercesParserLiaison)
XALAN_USING_XALAN(XalanDocument)
XALAN_USING_XALAN(XalanTransformer)

#endif

#ifndef XSEC_NO_XSLT

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

class DSIG_EXPORT TXFMXSL : public TXFMBase {

private:

	safeBuffer expr;							// The expression being worked with

	XercesDOMSupport	xds;
	XercesParserLiaison xpl;

	XalanDocument		* xd;

	safeBuffer			sbInDoc;

	// The actual transformer elements
	XalanTransformer xt;
	
	DOMDocument		* document;
	
	DOMDocument		* docOut;			// The output from the transformation

public:

	TXFMXSL(DOMDocument *doc);
	~TXFMXSL();

	// 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 nodeType getNodeType(void);

	// We do our own name spaces - we have a new document!
	
	virtual bool nameSpacesExpanded(void);
	virtual void expandNameSpaces(void);


	// XSL Unique

	void evaluateStyleSheet(const safeBuffer &sbStyleSheet);

	// Methods to get output data

	virtual unsigned int readBytes(XMLByte * const toFill, const unsigned int maxToFill);
	virtual DOMDocument *getDocument();
	virtual DOMNode *getFragmentNode();
	virtual const XMLCh * getFragmentId();
	
private:
	TXFMXSL();

};


#endif /* No XSLT */