/*
 * 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.
 */
#include "ElemWhen.hpp"


#include <xercesc/sax/AttributeList.hpp>


#include <xalanc/PlatformSupport/DOMStringHelper.hpp>
#include <xalanc/PlatformSupport/XalanMessageLoader.hpp>


#include "Constants.hpp"
#include "StylesheetConstructionContext.hpp"


XALAN_CPP_NAMESPACE_BEGIN


ElemWhen::ElemWhen(
			StylesheetConstructionContext&	constructionContext,
			Stylesheet&						stylesheetTree,
			const AttributeListType&		atts,
			int								lineNumber,
			int								columnNumber) :
	ElemTemplateElement(constructionContext,
						stylesheetTree,
						lineNumber,
						columnNumber,
						StylesheetConstructionContext::ELEMNAME_WHEN),
	m_test(0)
{
	const unsigned int	nAttrs = atts.getLength();

	for(unsigned int i = 0; i < nAttrs; ++i)
	{
		const XalanDOMChar* const	aname = atts.getName(i);

		if (equals(aname, Constants::ATTRNAME_TEST))
		{
			m_test = constructionContext.createXPath(getLocator(), atts.getValue(i), *this);
		}
		else if(!(isAttrOK(aname, atts, i, constructionContext) || 
				 processSpaceAttr(aname, atts, i, constructionContext)))
		{
			constructionContext.error(
					XalanMessageLoader::getMessage(
						XalanMessages::TemplateHasIllegalAttribute_2Param,
						Constants::ELEMNAME_WHEN_WITH_PREFIX_STRING.c_str(),
						aname),
					0,
					this);
		}
	}

	if(0 == m_test)
	{
		constructionContext.error(
			XalanMessageLoader::getMessage(
				XalanMessages::TemplateMustHaveAttribute_2Param,
				Constants::ELEMNAME_WHEN_WITH_PREFIX_STRING,
				Constants::ATTRNAME_TEST),
			0,
			this);
	}
}


const XalanDOMString&
ElemWhen::getElementName() const
{
	return Constants::ELEMNAME_WHEN_WITH_PREFIX_STRING;
}


#if !defined(XALAN_RECURSIVE_STYLESHEET_EXECUTION)
const ElemTemplateElement*
ElemWhen::startElement(StylesheetExecutionContext&	executionContext) const
{
	ElemTemplateElement::startElement(executionContext);
	
	return beginExecuteChildren(executionContext);
}


void
ElemWhen::endElement(StylesheetExecutionContext&	executionContext) const
{
	 endExecuteChildren(executionContext);
}
#endif


#if defined(XALAN_RECURSIVE_STYLESHEET_EXECUTION)
void
ElemWhen::execute(StylesheetExecutionContext&	executionContext) const
{
	ElemTemplateElement::execute(executionContext);

	executeChildren(executionContext);
}
#endif


const XPath*
ElemWhen::getXPath(unsigned int	index) const
{
	return index == 0 ? m_test : 0;
}


XALAN_CPP_NAMESPACE_END