src/XPath/FunctionNamespaceURI.cpp

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2000 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.
 *
 * 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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 * 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 "FunctionNamespaceURI.hpp"



#include <PlatformSupport/DOMStringHelper.hpp>



#include <DOMSupport/DOMServices.hpp>



#include "XObjectFactory.hpp"



FunctionNamespaceURI::FunctionNamespaceURI()
{
}



FunctionNamespaceURI::~FunctionNamespaceURI()
{
}



static const XalanDOMString		theEmptyString;



XObjectPtr
FunctionNamespaceURI::execute(
			XPathExecutionContext&	executionContext,
			XalanNode*				context,
			const Locator*			locator) const
{
	if (context == 0)
	{
		executionContext.error(
				"The namespace-uri() function requires a non-null context node!",
				context,
				locator);

		// Dummy return value...
		return XObjectPtr(0);
	}
	else
	{
		return executionContext.getXObjectFactory().createStringReference(DOMServices::getNamespaceOfNode(*context));
	}
}



XObjectPtr
FunctionNamespaceURI::execute(
			XPathExecutionContext&	executionContext,
			XalanNode*				/* context */,
			const XObjectPtr		arg1,
			const Locator*			locator) const
{
	assert(arg1.null() == false);	
	
	const NodeRefListBase&	theList = arg1->nodeset();

	if (theList.getLength() == 0)
	{
		return executionContext.getXObjectFactory().createStringReference(theEmptyString);
	}
	else
	{
		assert(theList.item(0) != 0);

		return execute(executionContext, theList.item(0), locator);
	}
}



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



const XalanDOMString
FunctionNamespaceURI::getError() const
{
	return StaticStringToDOMString(XALAN_STATIC_UCODE_STRING("The namespace-uri() function takes zero arguments or one argument!"));
}