/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 * 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 "<WebSig>" 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
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 * ====================================================================
 *
 * 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) 2001, Institute for
 * Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
 * The development of this software was partly funded by the European 
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 */

/*
 * XSEC
 *
 * XSECURIResolverXerces := Virtual Interface class that takes a URI and
 *                    creates a binary input stream from it.
 *
 * Author(s): Berin Lautenbach
 *
 * $ID$
 *
 * $LOG$
 *
 */


#include <xsec/framework/XSECDefs.hpp>
#include <xsec/framework/XSECURIResolverXerces.hpp>
#include <xsec/framework/XSECError.hpp>

#include <xercesc/framework/URLInputSource.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/util/Janitor.hpp>

XSEC_USING_XERCES(XMLString);
XSEC_USING_XERCES(Janitor);


#include <string.h>

// --------------------------------------------------------------------------------
//           Constructors and Destructors
// --------------------------------------------------------------------------------

XSECURIResolverXerces::XSECURIResolverXerces(const XMLCh * baseURI) {

	if (baseURI != 0) {

		mp_baseURI = XMLString::replicate(baseURI);

	}
	else
		mp_baseURI = NULL;

};

XSECURIResolverXerces::~XSECURIResolverXerces() {

	if (mp_baseURI != NULL)
		delete[] mp_baseURI;
}

// --------------------------------------------------------------------------------
//           Interface Methods
// --------------------------------------------------------------------------------

XERCES_CPP_NAMESPACE_QUALIFIER BinInputStream * XSECURIResolverXerces::resolveURI(const XMLCh * uri) {

	XSEC_USING_XERCES(URLInputSource);
	XSEC_USING_XERCES(XMLURL);
	XSEC_USING_XERCES(BinInputStream);

	
	URLInputSource			* URLS;		// Use Xerces URL Input source
	BinInputStream			* is;		// To handle the actual input

	if (uri == NULL) {
		throw XSECException(XSECException::ErrorOpeningURI,
			"XSECURIResolverXerces - anonymous references not supported in default URI Resolvers");
	}

	if (mp_baseURI == 0) {
		XSECnew(URLS, URLInputSource(XMLURL(uri)));
	}
	else {
		XSECnew(URLS, URLInputSource(XMLURL(XMLURL(mp_baseURI), uri)));
	}

	// makeStream can (and is quite likely to) throw an exception
	Janitor<URLInputSource> j_URLS(URLS);

	is = URLS->makeStream();

	if (is == NULL) {

		throw XSECException(XSECException::ErrorOpeningURI,
			"An error occurred in XSECURIREsolverXerces when opening an URLInputStream");

	}

	return is;

}


XSECURIResolver * XSECURIResolverXerces::clone(void) {

	XSECURIResolverXerces * ret;

	ret = new XSECURIResolverXerces();

	if (this->mp_baseURI != 0)
		ret->mp_baseURI = XMLString::replicate(this->mp_baseURI);
	else
		ret->mp_baseURI = 0;

	return ret;

}

// --------------------------------------------------------------------------------
//           Specific Methods
// --------------------------------------------------------------------------------


void XSECURIResolverXerces::setBaseURI(const XMLCh * uri) {

	if (mp_baseURI != 0)
		delete mp_baseURI;

	mp_baseURI = XMLString::replicate(uri);

};