/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999-2004 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xalan" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.ibm.com.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * @author <a href="mailto:david_n_bertoni@lotus.com">David N. Bertoni</a>
 */
#if !defined(STYLESHEETEXECUTIONCONTEXTDEFAULT_HEADER_GUARD_1357924680)
#define STYLESHEETEXECUTIONCONTEXTDEFAULT_HEADER_GUARD_1357924680


// Base class include file.
#include <xalanc/XSLT/StylesheetExecutionContext.hpp>


#include <ctime>
#include <deque>
#include <memory>
#include <set>
#include <vector>


#include <xalanc/Include/XalanObjectCache.hpp>


#include <xalanc/XPath/XPathExecutionContextDefault.hpp>


#include <xalanc/XMLSupport/FormatterToText.hpp>


#if defined(XALAN_AUTO_PTR_REQUIRES_DEFINITION)
#include <xalanc/XalanSourceTree/XalanSourceTreeDocument.hpp>
#endif
#include <xalanc/XalanSourceTree/FormatterToSourceTree.hpp>
#include <xalanc/XalanSourceTree/XalanSourceTreeDocumentFragment.hpp>


#include <xalanc/XSLT/CountersTable.hpp>
#include <xalanc/XSLT/NodeSorter.hpp>
#include <xalanc/XSLT/Stylesheet.hpp>
#include <xalanc/XSLT/VariablesStack.hpp>
#include <xalanc/XSLT/XResultTreeFragAllocator.hpp>
#include <xalanc/XSLT/XalanSourceTreeDocumentAllocator.hpp>
#include <xalanc/XSLT/XalanSourceTreeDocumentFragmentAllocator.hpp>


XALAN_CPP_NAMESPACE_BEGIN


class XalanSourceTreeDocument;
class XPathProcessor;
class XSLTEngineImpl;


//
// An class which provides support for executing stylesheets.
//
class XALAN_XSLT_EXPORT StylesheetExecutionContextDefault : public StylesheetExecutionContext
{
public:

#if defined(XALAN_STRICT_ANSI_HEADERS)
	typedef std::clock_t	ClockType;
#else
	typedef clock_t			ClockType;
#endif

#if defined(XALAN_NO_STD_NAMESPACE)
	typedef deque<const ElemTemplateElement*>			ElementTemplateElementStackType;
	typedef vector<FormatterListener*>					FormatterListenerVectorType;
	typedef vector<PrintWriter*>						PrintWriterVectorType;
	typedef vector<XalanOutputStream*>					OutputStreamVectorType;
	typedef set<const KeyDeclaration*,
				less<const KeyDeclaration*> >			KeyDeclarationSetType;
	typedef pair<const XPath*, ClockType>				XPathCacheEntry;
	typedef map<XalanDOMString,
				XPathCacheEntry,
				less<XalanDOMString> >					XPathCacheMapType;
	typedef deque<const ElemTemplate*>					CurrentTemplateStackType;
#else
	typedef std::deque<const ElemTemplateElement*>		ElementTemplateElementStackType;
	typedef std::vector<FormatterListener*>				FormatterListenerVectorType;
	typedef std::vector<PrintWriter*>					PrintWriterVectorType;
	typedef std::vector<XalanOutputStream*>				OutputStreamVectorType;
	typedef std::set<const KeyDeclaration*>				KeyDeclarationSetType;
	typedef std::pair<const XPath*, ClockType>			XPathCacheEntry;
	typedef std::map<XalanDOMString, XPathCacheEntry>	XPathCacheMapType;
	typedef std::deque<const ElemTemplate*>				CurrentTemplateStackType;
#endif

	typedef Stylesheet::KeyTablesTableType				KeyTablesTableType;
	typedef VariablesStack::ParamsVectorType			ParamsVectorType;


	/**
	 * Construct a StylesheetExecutionContextDefault object
	 *
	 * @param theXPathEnvSupport XPath environment support class instance
	 * @param theDOMSupport		 DOMSupport class instance
	 * @param theXobjectFactory  factory class instance for XObjects
	 * @param theCurrentNode     current node in the source tree
	 * @param theContextNodeList node list for current context
	 * @param thePrefixResolver  pointer to prefix resolver to use
	 */	
	StylesheetExecutionContextDefault(
			XSLTEngineImpl&			xsltProcessor,
			XPathEnvSupport&		theXPathEnvSupport,
			DOMSupport&				theDOMSupport,
			XObjectFactory&			theXObjectFactory,
			XalanNode*				theCurrentNode = 0,
			const NodeRefListBase*	theContextNodeList = 0,
			const PrefixResolver*	thePrefixResolver = 0);

	/**
	 * Construct a StylesheetExecutionContextDefault object
	 *
	 * @param theXPathEnvSupport XPath environment support class instance
	 * @param theDOMSupport		 DOMSupport class instance
	 * @param theXobjectFactory  factory class instance for XObjects
	 * @param theCurrentNode     current node in the source tree
	 * @param theContextNodeList node list for current context
	 * @param thePrefixResolver  pointer to prefix resolver to use
	 */
	explicit
	StylesheetExecutionContextDefault(
			XalanNode*				theCurrentNode = 0,
			const NodeRefListBase*	theContextNodeList = 0,
			const PrefixResolver*	thePrefixResolver = 0);

	virtual
	~StylesheetExecutionContextDefault();


	/**
	 * Set the value of the flag that controls whether HTML output will
	 * check for namespace declarations on HTML elements.
	 *
	 * Set this to true if you want the HTML output formatter to skip
	 * checking for namespaces on elements.  This makes HTML output more
	 * efficient, but can result in non-conforming behavior, since the XSLT
	 * recommendation requires XML output for elements with namespaces.
	 *
	 * @param theValue The boolean value
	 */
	bool
	setIgnoreHTMLElementNamespaces() const
	{
		return m_ignoreHTMLElementNamespaces;
	}

	/**
	 * Set the value of the flag that controls whether HTML output will
	 * check for namespace declarations on HTML elements.
	 *
	 * @return The value
	 */
	void
	setIgnoreHTMLElementNamespaces(bool		theValue)
	{
		m_ignoreHTMLElementNamespaces = theValue;
	}

	/**
	 * Set the XPathEnvSupport instance.
	 *
	 * @param theSupport a reference to the instance to use.
	 */
	void
	setXPathEnvSupport(XPathEnvSupport*		theSupport)
	{
		m_xpathExecutionContextDefault.setXPathEnvSupport(theSupport);
	}

	/**
	 * Set the DOMSupport instance.
	 *
	 * @param theDOMSupport a reference to the instance to use.
	 */
	void
	setDOMSupport(DOMSupport*	theDOMSupport)
	{
		m_xpathExecutionContextDefault.setDOMSupport(theDOMSupport);
	}

	/**
	 * Set the XObjectFactory instance.
	 *
	 * @param theFactory a reference to the instance to use.
	 */
	void
	setXObjectFactory(XObjectFactory*	theXObjectFactory)
	{
		m_xpathExecutionContextDefault.setXObjectFactory(theXObjectFactory);

		m_xobjectFactory = theXObjectFactory;
	}


	/**
	 * Set the DOMSupport instance.
	 *
	 * @param theDOMSupport a reference to the instance to use.
	 */
	void
	setXSLTProcessor(XSLTEngineImpl*	theProcessor)
	{
		m_xsltProcessor = theProcessor;
	}

	bool
	getUsePerInstanceDocumentFactory() const
	{
		return m_usePerInstanceDocumentFactory;
	}

	void
	setUsePerInstanceDocumentFactory(bool	fValue)
	{
		m_usePerInstanceDocumentFactory = fValue;
	}


	// These interfaces are inherited from StylesheetExecutionContext...

	virtual void
	error(
			const XalanDOMString&		msg,
			const ElemTemplateElement&	styleNode,
			const XalanNode* 			sourceNode = 0) const;

	virtual void
	error(
			const char*					msg,
			const ElemTemplateElement&	styleNode,
			const XalanNode* 			sourceNode = 0) const;

	virtual void
	warn(
			const XalanDOMString&		msg,
			const ElemTemplateElement&	styleNode,
			const XalanNode* 			sourceNode = 0) const;

	virtual void
	warn(
			const char*					msg,
			const ElemTemplateElement&	styleNode,
			const XalanNode* 			sourceNode = 0) const;

	virtual void
	message(
			const XalanDOMString&		msg,
			const ElemTemplateElement&	styleNode,
			const XalanNode* 			sourceNode = 0) const;

	virtual void
	message(
			const char*					msg,
			const ElemTemplateElement&	styleNode,
			const XalanNode* 			sourceNode = 0) const;

	virtual bool
	getQuietConflictWarnings() const;

	virtual bool
	getCopyTextNodesOnly() const;

	virtual void
	setCopyTextNodesOnly(bool	fValue);

	virtual XalanNode*
	getRootDocument() const;

	virtual void
	setRootDocument(XalanNode*	theDocument);

	virtual XalanDocument*
	createDocument() const;

	virtual void
	setStylesheetRoot(const StylesheetRoot*		theStylesheet);

	virtual const XalanQName*
	getCurrentMode() const;

	virtual	void
	setCurrentMode(const XalanQName*	theMode); 

	virtual const ElemTemplate*
	getCurrentTemplate() const;

	virtual	void
	pushCurrentTemplate(const ElemTemplate*	theTemplate);

	virtual	void
	popCurrentTemplate();

	virtual bool
	doDiagnosticsOutput() const;

	virtual void
	diag(const XalanDOMString&	theString);

	virtual void
	pushTime(const void*	theKey);

	virtual void
	displayDuration(
			const XalanDOMString&	theMessage,
			const void*				theKey);

	virtual bool
	isElementPending() const;

	virtual void
	replacePendingAttribute(
			const XalanDOMChar*		theName,
			const XalanDOMChar*		theNewType,
			const XalanDOMChar*		theNewValue);

	virtual void
	pushOutputContext(FormatterListener*	flistener = 0);

	virtual void
	popOutputContext();

	virtual void
	addResultAttribute(
			const XalanDOMString&	aname,
			const XalanDOMString&	value);

	virtual void
	addResultAttribute(
			const XalanDOMString&	aname,
			const XalanDOMChar*		value);

	virtual void
	copyNamespaceAttributes(const XalanNode&	src);

	virtual const XalanDOMString*
	getResultPrefixForNamespace(const XalanDOMString&	theNamespace) const;

	virtual const XalanDOMString*
	getResultNamespaceForPrefix(const XalanDOMString&	thePrefix) const;

	virtual bool
	isPendingResultPrefix(const XalanDOMString&	thePrefix);

	virtual XalanDOMString
	getUniqueNamespaceValue() const;

	virtual void
	getUniqueNamespaceValue(XalanDOMString&		theValue) const;

	virtual FormatterListener*
	getFormatterListener() const;

	virtual void
	setFormatterListener(FormatterListener*		flistener);

	virtual int
	getIndent() const;

	virtual void
	setIndent(int	indentAmount);

	virtual const XPath*
	createMatchPattern(
			const XalanDOMString&	str,
			const PrefixResolver&	resolver);

	virtual void
	returnXPath(const XPath*	xpath);

	virtual void
	pushTopLevelVariables(const ParamVectorType&	topLevelParams);

	virtual const XObjectPtr
	createVariable(
			const XPath&				xpath,
			XalanNode*					contextNode,
			const PrefixResolver&		resolver);

	virtual const XObjectPtr
	createVariable(
			const ElemTemplateElement&	templateChild,
			XalanNode*					sourceNode);

	virtual void
	pushVariable(
			const XalanQName&			name,
			const ElemTemplateElement*	element,
			const XalanDOMString&		str,
			XalanNode*					contextNode,
			const PrefixResolver&		resolver);

	virtual void
	pushVariable(
			const XalanQName&			name,
			const XObjectPtr			val,
			const ElemTemplateElement*	element);

	virtual void
	pushVariable(
			const XalanQName&			name,
			const ElemVariable*			var,
			const ElemTemplateElement*	element);

	virtual void
	pushVariable(
			const XalanQName&			name,
			const ElemTemplateElement*	element,
			const XPath&				xpath,
			XalanNode*					contextNode,
			const PrefixResolver&		resolver);

	virtual void
	pushVariable(
			const XalanQName&			name,
			const ElemTemplateElement*	element,
			const ElemTemplateElement&	templateChild,
			XalanNode*					sourceNode);

	virtual void
	pushContextMarker();

	virtual void
	popContextMarker();

	virtual void
	resolveTopLevelParams();

	virtual void
	clearTopLevelParams();

	virtual	void
	pushParams(const ElemTemplateElement&	xslCallTemplateElement);

	virtual const XObjectPtr
	getParamVariable(const XalanQName&	theName);

	virtual void
	pushElementFrame(const ElemTemplateElement*		elem);

	virtual void
	popElementFrame();

	virtual int
	getGlobalStackFrameIndex() const;

	virtual int
	getCurrentStackFrameIndex() const;

	virtual void
	setCurrentStackFrameIndex(int currentStackFrameIndex = -1);

	virtual void
	startDocument();

	virtual void
	endDocument();

	virtual void
	startElement(const XalanDOMChar*	name);

	virtual void
	endElement(const XalanDOMChar*	name);

	virtual void
	characters(
			const XalanDOMChar*			ch,
			XalanDOMString::size_type	start,
			XalanDOMString::size_type	length);

	virtual void
	charactersRaw(
			const XalanDOMChar*			ch,
			XalanDOMString::size_type	start,
			XalanDOMString::size_type	length);

	virtual void
	comment(const XalanDOMChar*		data);

	virtual void
	processingInstruction(
			const XalanDOMChar*		target,
			const XalanDOMChar*		data);

	virtual void
	flushPending();

	virtual void
	cloneToResultTree(
			const XalanNode&	node,
			const LocatorType*	locator);

	virtual void
	cloneToResultTree(
			const XalanNode&		node,
			XalanNode::NodeType		nodeType,
			bool					isLiteral,
			bool					overrideStrip,
			bool					shouldCloneAttributes,
			const LocatorType*		locator);

	virtual const XObjectPtr
	createXResultTreeFrag(
			const ElemTemplateElement&	templateChild,
			XalanNode*					sourceNode);

	virtual void
	outputToResultTree(
			const XObject&		xobj,
			const LocatorType*	locator);

	virtual void
	outputResultTreeFragment(
			const XObject&		theTree,
			const LocatorType*	locator);

	virtual const XalanDOMString&
	getXSLNameSpaceURL() const;

	virtual const XalanDOMString&
	getXalanXSLNameSpaceURL() const;

	virtual bool
	findOnElementRecursionStack(const ElemTemplateElement*	theElement) const;

	virtual void
	pushOnElementRecursionStack(const ElemTemplateElement*	theElement);

	virtual const ElemTemplateElement*
	popElementRecursionStack();

	virtual bool
	returnXResultTreeFrag(XResultTreeFrag*	theXResultTreeFrag);

	virtual eEscapeURLs
	getEscapeURLs() const;

	virtual void
	setEscapeURLs(eEscapeURLs	value);

	virtual eOmitMETATag
	getOmitMETATag() const;

	void
	setOmitMETATag(eOmitMETATag		value);

	virtual FormatterListener*
	createFormatterToXML(
			Writer&					writer,
			const XalanDOMString&	version = XalanDOMString(),
			bool					doIndent = false,
			int						indent = eDefaultXMLIndentAmount,
			const XalanDOMString&	encoding = XalanDOMString(),
			const XalanDOMString&	mediaType = XalanDOMString(),
			const XalanDOMString&	doctypeSystem = XalanDOMString(),
			const XalanDOMString&	doctypePublic = XalanDOMString(),
			bool					xmlDecl = true,
			const XalanDOMString&	standalone = XalanDOMString());

	virtual FormatterListener*
	createFormatterToHTML(
			Writer&					writer,
			const XalanDOMString&	encoding = XalanDOMString(),
			const XalanDOMString&	mediaType = XalanDOMString(),
			const XalanDOMString&	doctypeSystem = XalanDOMString(),
			const XalanDOMString&	doctypePublic = XalanDOMString(),
			bool					doIndent = true,
			int						indent = eDefaultHTMLIndentAmount,
			bool					escapeURLs = true,
			bool					omitMetaTag = false);

	virtual FormatterListener*
	createFormatterToDOM(
			XalanDocument*			doc,
			XalanDocumentFragment*	docFrag,
			XalanElement*			currentElement);

	virtual FormatterListener*
	createFormatterToDOM(
			XalanDocument*	doc,
			XalanElement*	elem);

	virtual FormatterListener*
	createFormatterToText(
			Writer&					writer,
			const XalanDOMString&	encoding);

	virtual NodeSorter*
	borrowNodeSorter();

	virtual bool
	returnNodeSorter(NodeSorter*	theSorter);

	virtual XalanNumberFormatAutoPtr
	createXalanNumberFormat();

	// A basic class to create XalanNumberFormat instances...
	class XALAN_XSLT_EXPORT XalanNumberFormatFactory
	{
	public:

		explicit
		XalanNumberFormatFactory();

		virtual
		~XalanNumberFormatFactory();

		virtual XalanNumberFormat*
		create();
	};

	static XalanNumberFormatFactory&
	getDefaultXalanNumberFormatFactory()
	{
		return s_defaultXalanNumberFormatFactory;
	}

	/**
	 * Static function to install a new XalanNumberFormatFactory.
	 * The caller owns the XalanNumberFormatFactory instance.
	 *
	 * @param a pointer to the new factory instance to use.
	 * @return a pointer to the old factory instance.
	 */
	static XalanNumberFormatFactory*
	installXalanNumberFormatFactory(XalanNumberFormatFactory*	theFactory);


	virtual size_type
	getTraceListeners() const;

	virtual void
	fireGenerateEvent(const GenerateEvent&	ge);

	virtual void
	fireTraceEvent(const TracerEvent&	te);

	virtual void
	fireSelectEvent(const SelectionEvent&	se);

	virtual bool
	getTraceSelects() const;

	virtual void
	traceSelect(
			const ElemTemplateElement&	theStylesheetElement,
			const NodeRefListBase&		nl,
			const XPath*				xpath);

	virtual int
	collationCompare(
			const XalanDOMString&				theLHS,
			const XalanDOMString&				theRHS,
			XalanCollationServices::eCaseOrder	theCaseOrder = XalanCollationServices::eDefault);

	virtual int
	collationCompare(
			const XalanDOMString&				theLHS,
			const XalanDOMString&				theRHS,
			const XalanDOMString&				theLocale,
			XalanCollationServices::eCaseOrder	theCaseOrder = XalanCollationServices::eDefault);

	virtual int
	collationCompare(
			const XalanDOMChar*					theLHS,
			const XalanDOMChar*					theRHS,
			XalanCollationServices::eCaseOrder	theCaseOrder = XalanCollationServices::eDefault);

	virtual int
	collationCompare(
			const XalanDOMChar*					theLHS,
			const XalanDOMChar*					theRHS,
			const XalanDOMChar*					theLocale,
			XalanCollationServices::eCaseOrder	theCaseOrder = XalanCollationServices::eDefault);

	typedef XalanCollationServices::CollationCompareFunctor		CollationCompareFunctor;

	class XALAN_XSLT_EXPORT DefaultCollationCompareFunctor : public CollationCompareFunctor
	{
	public:

		DefaultCollationCompareFunctor();

		virtual
		~DefaultCollationCompareFunctor();

		virtual int
		operator()(
			const XalanDOMChar*					theLHS,
			const XalanDOMChar*					theRHS,
			XalanCollationServices::eCaseOrder	theCaseOrder = XalanCollationServices::eDefault) const;

		virtual int
		operator()(
			const XalanDOMChar*					theLHS,
			const XalanDOMChar*					theRHS,
			const XalanDOMChar*					theLocale,
			XalanCollationServices::eCaseOrder	theCaseOrder = XalanCollationServices::eDefault) const;
	};

	const CollationCompareFunctor*
	installCollationCompareFunctor(CollationCompareFunctor*		theFunctor);

	CollationCompareFunctor*
	uninstallCollationCompareFunctor();

	virtual	bool
	getInConstruction(const KeyDeclaration&		keyDeclaration) const;

	virtual	void
	beginConstruction(const KeyDeclaration&		keyDeclaration);

	virtual	void
	endConstruction(const KeyDeclaration&	keyDeclaration);

	virtual const XalanDecimalFormatSymbols*
	getDecimalFormatSymbols(const XalanQName&	qname);

	virtual PrintWriter*
	createPrintWriter(XalanOutputStream*		theTextOutputStream);

	virtual PrintWriter*
	createPrintWriter(
			const XalanDOMString&		theFileName,
			const XalanDOMString&		theEncoding);

	virtual PrintWriter*
	createPrintWriter(StreamType&	theStream);

	virtual PrintWriter*
	createPrintWriter(FILE*		theStream);

	virtual CountersTable&
	getCountersTable();

	virtual void
	characters(const XalanNode&		node);

	virtual void
	characters(const XObjectPtr&	xobject);

	virtual void
	charactersRaw(const XalanNode&	node);

	virtual void
	charactersRaw(const XObjectPtr&		xobject);


	// These interfaces are inherited from XPathExecutionContext...

	virtual void
	reset();

	virtual XalanNode*
	getCurrentNode() const;

	virtual void
	pushCurrentNode(XalanNode*	theCurrentNode);

	virtual void
	popCurrentNode();

	virtual bool
	isNodeAfter(
			const XalanNode&	node1,
			const XalanNode&	node2) const;

	virtual void
	pushContextNodeList(const NodeRefListBase&	theList);

	virtual void	
	popContextNodeList();

	virtual const NodeRefListBase&
	getContextNodeList() const;

	virtual size_type
	getContextNodeListLength() const;

	virtual size_type
	getContextNodeListPosition(const XalanNode&		contextNode) const;

	virtual bool
	elementAvailable(const XalanQName&	theQName) const;

	virtual bool
	elementAvailable(
			const XalanDOMString&	theName,
			const LocatorType*		locator) const;

	virtual bool
	functionAvailable(const XalanQName&		theQName) const;

	virtual bool
	functionAvailable(
			const XalanDOMString&	theName,
			const LocatorType*		locator) const;

	virtual const XObjectPtr
	extFunction(
			const XalanDOMString&			theNamespace,
			const XalanDOMString&			functionName,
			XalanNode*						context,
			const XObjectArgVectorType&		argVec,
			const LocatorType*				locator);

	virtual XalanDocument*
	parseXML(
			const XalanDOMString&	urlString,
			const XalanDOMString&	base) const;

	virtual MutableNodeRefList*
	borrowMutableNodeRefList();

	virtual bool
	returnMutableNodeRefList(MutableNodeRefList*	theList);

	virtual MutableNodeRefList*
	createMutableNodeRefList() const;

	virtual XalanDOMString&
	getCachedString();

	virtual bool
	releaseCachedString(XalanDOMString&		theString);

	virtual void
	getNodeSetByKey(
			XalanDocument*			doc,
			const XalanQName&		qname,
			const XalanDOMString&	ref,
			MutableNodeRefList&		nodelist);

	virtual void
	getNodeSetByKey(			
			XalanDocument*			doc,
			const XalanDOMString&	name,
			const XalanDOMString&	ref,
			const LocatorType*		locator,
			MutableNodeRefList&		nodelist);

	virtual const XObjectPtr
	getVariable(
			const XalanQName&	name,
			const LocatorType*	locator = 0);

	virtual const PrefixResolver*
	getPrefixResolver() const;

	virtual void
	setPrefixResolver(const PrefixResolver*		thePrefixResolver);

	virtual const XalanDOMString*
	getNamespaceForPrefix(const XalanDOMString&		prefix) const;

	virtual XalanDOMString
	findURIFromDoc(const XalanDocument*		owner) const;

	virtual const XalanDOMString&
	getUnparsedEntityURI(
			const XalanDOMString&	theName,
			const XalanDocument&	theDocument) const;

	virtual bool
	shouldStripSourceNode(const XalanNode&	node);

	virtual XalanDocument*
	getSourceDocument(const XalanDOMString&		theURI) const;

	virtual void
	setSourceDocument(
			const XalanDOMString&	theURI,
			XalanDocument*			theDocument);


	// These interfaces are inherited from ExecutionContext...

	virtual void
	error(
			const XalanDOMString&	msg,
			const XalanNode* 		sourceNode,
			const LocatorType* 		locator) const;

	virtual void
	error(
			const char*			msg,
			const XalanNode* 	sourceNode,
			const LocatorType* 	locator) const;

	virtual void
	warn(
			const XalanDOMString&	msg,
			const XalanNode* 		sourceNode,
			const LocatorType* 		locator) const;

	virtual void
	warn(
			const char*			msg,
			const XalanNode* 	sourceNode,
			const LocatorType* 	locator) const;

	virtual void
	message(
			const XalanDOMString&	msg,
			const XalanNode* 	sourceNode,
			const LocatorType* 	locator) const;

	virtual void
	message(
			const char*			msg,
			const XalanNode* 	sourceNode,
			const LocatorType* 	locator) const;


	class XPathCacheReturnFunctor
	{
	public:

		XPathCacheReturnFunctor(XSLTEngineImpl&		xsltProcessor) :
			m_xsltProcessor(xsltProcessor)
		{
		}

		void
		operator()(const XPathCacheMapType::value_type&		theCacheEntry);

	private:

		XSLTEngineImpl&		m_xsltProcessor;
	};

	/**
	 * Get a XalanSourceTreeDocument, primarily for creating result 
	 * tree fragments.
	 */
	XalanSourceTreeDocument*
	getSourceTreeFactory() const;

protected:

	virtual FormatterToText*
	borrowFormatterToText();

	virtual bool
	returnFormatterToText(FormatterToText*	theFormatter);

private:

	/**
	 * Given a context, create the params for a template
	 * call.
	 *
	 * @param xslCallTemplateElement "call-template" element
	 * @param params The params
	 */
	void
	getParams(
			const ElemTemplateElement&	xslCallTemplateElement,
			ParamsVectorType&			params);

	/**
	 * Determine if the XPath is one that we have cached.
	 *
	 * @param theXPath the XPath instance to check
	 * @return true if the instance has been cached, false if not.
	 */
	bool
	isCached(const XPath*	theXPath);

	/**
	 * Clear out the cache of XPath instances.
	 */
	void
	clearXPathCache();

	/**
	 * Add an XPath instance to the cache, clearing out an old entry
	 * if the cache is full.
	 *
	 * @param pattern the key for looking up the XPath instance in the cache.
	 * @param theXPath the XPath instance to cache
	 */
	void
	addToXPathCache(
			const XalanDOMString&	pattern,
			const XPath*			theXPath);


	/**
	 * Clean up anything that was created for use only during the transformation.
	 */
	void
	cleanUpTransients();

	XPathExecutionContextDefault	m_xpathExecutionContextDefault;

	XSLTEngineImpl*					m_xsltProcessor;

	XalanNode*						m_rootDocument;

	enum { eXPathCacheMax = 50,
		   eDefaultParamsVectorSize = 10,
		   eXResultTreeFragAllocatorBlockSize = 10,
		   eDocumentAllocatorBlockSize = 10,
		   eDocumentFragmentAllocatorBlockSize = 10,
		   eDefaultAttributeAllocatorBlockSize = 10,
		   eDefaultAttributeNSAllocatorBlockSize = 10,
		   eDefaultCommentAllocatorBlockSize = 10,
		   eDefaultElementAllocatorBlockSize = 10,
		   eDefaultElementNSAllocatorBlockSize = 10,
		   eDefaultPIAllocatorBlockSize = 10,
		   eDefaultTextAllocatorBlockSize = 20,
		   eDefaultTextIWSAllocatorBlockSize = 20 };

	ElementTemplateElementStackType		m_elementRecursionStack;

	const PrefixResolver*				m_prefixResolver;

	const StylesheetRoot*				m_stylesheetRoot;

	FormatterListenerVectorType			m_formatterListeners;

	PrintWriterVectorType				m_printWriters;

	OutputStreamVectorType				m_outputStreams;

	CollationCompareFunctor*			m_collationCompareFunctor;

	/**
	 * Holds all information about variables during execution.
	 */
	VariablesStack						m_variablesStack;

	ParamsVectorType					m_paramsVector;

	XPathCacheMapType					m_matchPatternCache;

	KeyTablesTableType					m_keyTables;

	KeyDeclarationSetType				m_keyDeclarationSet;

	CountersTable						m_countersTable;

	// If true, we will not check HTML output for elements with
	// namespaces.  This is an optimization which can lead to
	// non-conforming behavior.
	bool								m_ignoreHTMLElementNamespaces;

	/**
	 * The factory that will be used to create result tree fragments based on our
	 * proprietary source tree.
	 */
	mutable XalanAutoPtr<XalanSourceTreeDocument>	m_sourceTreeResultTreeFactory;

	// Holds the current mode.
	const XalanQName*					m_mode;

	CurrentTemplateStackType			m_currentTemplateStack;

	typedef XalanObjectCacheDefault<FormatterToText>		FormatterToTextCacheType;
	typedef XalanObjectCacheDefault<FormatterToSourceTree>	FormatterToSourceTreeCacheType;
	typedef XalanObjectCacheDefault<NodeSorter>				NodeSorterCacheType;

	FormatterToTextCacheType			m_formatterToTextCache;

	FormatterToSourceTreeCacheType		m_formatterToSourceTreeCache;

	NodeSorterCacheType					m_nodeSorterCache;

	int									m_indentAmount;

	XResultTreeFragAllocator			m_xresultTreeFragAllocator;

	XalanSourceTreeDocumentFragmentAllocator	m_documentFragmentAllocator;

	XalanSourceTreeDocumentAllocator	m_documentAllocator;

	// If true, we will use a separate document factory for
	// result tree fragments.
	bool								m_usePerInstanceDocumentFactory;

	// If true, only text nodes will be cloned in the output...
	bool								m_cloneTextNodesOnly;

	// Determines whether or not to override the property in the stylesheet.
	eEscapeURLs							m_escapeURLs;

	// Determines whether or not to override the property in the stylesheet.
	eOmitMETATag						m_omitMETATag;

	static XalanNumberFormatFactory		s_defaultXalanNumberFormatFactory;

	static XalanNumberFormatFactory*	s_xalanNumberFormatFactory;

	static const DefaultCollationCompareFunctor		s_defaultCollationFunctor;
};


XALAN_CPP_NAMESPACE_END


#endif	// STYLESHEETEXECUTIONCONTEXTDEFAULT_HEADER_GUARD_1357924680