src/XSLT/ElemIf.cpp

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 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.
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 * 4. The names "Xalan" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
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 * 5. Products derived from this software may not be called "Apache",
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * 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/>.
 */
#include "ElemIf.hpp"



#include <sax/AttributeList.hpp>



#include <PlatformSupport/DOMStringHelper.hpp>
#include <XPath/XPath.hpp>



#include "Constants.hpp"
#include "SelectionEvent.hpp"
#include "Stylesheet.hpp"
#include "StylesheetConstructionContext.hpp"
#include "StylesheetExecutionContext.hpp"
#include "StylesheetRoot.hpp"



ElemIf::ElemIf(
			StylesheetConstructionContext&	constructionContext,
			Stylesheet&						stylesheetTree,
			const DOMString&				name,
			const AttributeList&			atts,
			int								lineNumber,
			int								columnNumber) :
	ElemTemplateElement(constructionContext,
						stylesheetTree,
						name,
						lineNumber,
						columnNumber),
	m_test(0)
{
	const int	nAttrs = atts.getLength();

	for(int i = 0; i < nAttrs; i++)
	{
		const DOMString		aname(atts.getName(i));
		
		const int			tok = constructionContext.getAttrTok(aname);

		switch(tok)
		{
		case Constants::TATTRNAME_TEST:
			m_test = constructionContext.createXPath(atts.getValue(i), *this);
			break;

		case Constants::TATTRNAME_XMLSPACE:
			processSpaceAttr(atts, i);
			break;

		default:
			if(!isAttrOK(tok, aname, atts, i))
			{
				constructionContext.error(name + " has an illegal attribute: " + aname);
			}
		}
	}

	if(0 == m_test)
	{
		constructionContext.error(name + " must have a 'test' attribute.");
	}
}



int
ElemIf::getXSLToken() const 
{
	return Constants::ELEMNAME_IF;
}



void ElemIf::execute(
			StylesheetExecutionContext&		executionContext,
			const DOM_Node&					sourceTree, 
			const DOM_Node&					sourceNode,
			const QName&					mode) const
{
	assert(m_test != 0);

	ElemTemplateElement::execute(executionContext,	sourceTree, sourceNode, mode);

	const XObject* const	test =
		m_test->execute(sourceNode, *this, executionContext.getXPathExecutionContext());

	if(0 != getStylesheet().getStylesheetRoot().getTraceListeners())
	{
		getStylesheet().getStylesheetRoot().fireSelectedEvent(
			SelectionEvent(executionContext,
			sourceNode,
			*this, 
			"test", 
			*m_test, 
			test));
	}

	if(test->boolean())
	{
		executeChildren(executionContext, sourceTree, sourceNode, mode);
	}
}