src/xalanc/XalanExtensions/FunctionIntersection.cpp

/*
 * 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 "FunctionIntersection.hpp"



#include <xalanc/PlatformSupport/XalanMessageLoader.hpp>



#include <xalanc/XPath/XPathExecutionContext.hpp>
#include <xalanc/XPath/XObjectFactory.hpp>



XALAN_CPP_NAMESPACE_BEGIN



FunctionIntersection::FunctionIntersection()
{
}



FunctionIntersection::~FunctionIntersection()
{
}



XObjectPtr
FunctionIntersection::execute(
			XPathExecutionContext&			executionContext,
			XalanNode*						context,
			const XObjectArgVectorType&		args,
			const LocatorType*				locator) const
{
	if (args.size() != 2)
	{
		executionContext.error(getError(), context, locator);
	}

	assert(args[0].null() == false && args[1].null() == false);

	const NodeRefListBase&	nodeset1 = args[0]->nodeset();
	const NodeRefListBase&	nodeset2 = args[1]->nodeset();

	typedef XPathExecutionContext::BorrowReturnMutableNodeRefList	BorrowReturnMutableNodeRefList;

	BorrowReturnMutableNodeRefList	theResult(executionContext);

	const NodeRefListBase::size_type	theLength = nodeset1.getLength();

	for (NodeRefListBase::size_type i = 0; i < theLength; ++i)
	{
		XalanNode* const	theNode = nodeset1.item(i);
		assert(theNode != 0);

		if (nodeset2.indexOf(theNode) != NodeRefListBase::npos)
		{
			theResult->addNodeInDocOrder(theNode, executionContext);
		}
	}

	theResult->setDocumentOrder();

	return executionContext.getXObjectFactory().createNodeSet(theResult);
}



#if defined(XALAN_NO_COVARIANT_RETURN_TYPE)
Function*
#else
FunctionIntersection*
#endif
FunctionIntersection::clone() const
{
	return new FunctionIntersection(*this);
}



const XalanDOMString
FunctionIntersection::getError() const
{
	return XalanMessageLoader::getMessage(XalanMessages::FunctionAcceptsTwoArguments_1Param,"intersection()");
}



XALAN_CPP_NAMESPACE_END