/*
 * Copyright 1999-2004 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.
 */
#if !defined(XALAN_ELEMVALUEOF_HEADER_GUARD)
#define XALAN_ELEMVALUEOF_HEADER_GUARD 


// Base include file.  Must be first.
#include "XSLTDefinitions.hpp"


// Base class header file.
#include "ElemTemplateElement.hpp"


XALAN_CPP_NAMESPACE_BEGIN


class XObjectPtr;
class XPath;


class ElemValueOf : public ElemTemplateElement
{
public:

	/**
	 * Construct an object corresponding to an "xsl:value-of" element
	 * 
	 * @param constructionContext context for construction of object
	 * @param stylesheetTree      stylesheet containing element
	 * @param atts                list of attributes for element
	 * @param lineNumber				line number in document
	 * @param columnNumber			column number in document
	 */
	ElemValueOf(
			StylesheetConstructionContext&	constructionContext,
			Stylesheet&						stylesheetTree,
			const AttributeListType&		atts,
			int								lineNumber,
			int								columnNumber);

	virtual
	~ElemValueOf();

	// These methods are inherited from ElemTemplateElement ...

	virtual const XalanDOMString&
	getElementName() const;

#if !defined(XALAN_RECURSIVE_STYLESHEET_EXECUTION)
	virtual const ElemTemplateElement*
	startElement(StylesheetExecutionContext&		executionContext) const;
#else
	virtual void
	execute(StylesheetExecutionContext&		executionContext) const;
#endif
	virtual	const XPath*
	getXPath(unsigned int	index = 0) const;

private:

	void
	fireSelectionEvent(
			StylesheetExecutionContext&		executionContext,
			XalanNode*						sourceNode,
			const XalanDOMString&			theValue) const;

	void
	fireSelectionEvent(
			StylesheetExecutionContext&		executionContext,
			XalanNode*						sourceNode,
			const XObjectPtr				theValue) const;

	void
	fireSelectionEvent(
			StylesheetExecutionContext&		executionContext,
			XalanNode*						sourceNode,
			const XObjectPtr				theValue,
			const XalanDOMString&			thePattern) const;


	/**
	 * The select pattern used to locate the value.
	 */
	const XPath*	m_selectPattern;
};


XALAN_CPP_NAMESPACE_END


#endif	// XALAN_ELEMVALUEOF_HEADER_GUARD