/*
 * 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 "FunctionHasSameNodes.hpp"


#include <xalanc/PlatformSupport/XalanMessageLoader.hpp>


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


XALAN_CPP_NAMESPACE_BEGIN


FunctionHasSameNodes::FunctionHasSameNodes()
{
}


FunctionHasSameNodes::~FunctionHasSameNodes()
{
}


XObjectPtr
FunctionHasSameNodes::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();

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

	bool	fResult = true;

	if (theLength != nodeset2.getLength())
	{
		fResult = false;
	}
	else
	{
		for (NodeRefListBase::size_type i = 0; i < theLength && fResult == true; ++i)
		{
			XalanNode* const	theNode = nodeset1.item(i);
			assert(theNode != 0);

			if (nodeset2.indexOf(theNode) == NodeRefListBase::npos)
			{
				fResult = false;
			}
		}
	}

	return executionContext.getXObjectFactory().createBoolean(fResult);
}


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


const XalanDOMString
FunctionHasSameNodes::getError() const
{
	return XalanMessageLoader::getMessage(XalanMessages::FunctionAcceptsTwoArguments_1Param,"has-same-nodes()");

}


XALAN_CPP_NAMESPACE_END