/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 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 "<WebSig>" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * 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) 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 
 * Commission in the <WebSig> project in the ISIS Programme. 
 * For more information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/*
 * XSEC
 *
 * XSECProvider.hpp := The main interface for users wishing to gain access
 *                     to signature objects
 *
 * Author(s): Berin Lautenbach
 *
 * $Id: XSECProvider.cpp,v 1.4 2003/03/01 06:27:29 blautenb Exp $
 *
 */

#include <xsec/framework/XSECProvider.hpp>
#include <xsec/framework/XSECError.hpp>
#include <xsec/utils/XSECDOMUtils.hpp>
#include <xsec/framework/XSECURIResolverXerces.hpp>

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


XSECProvider::XSECProvider() {

	mp_URIResolver = new XSECURIResolverXerces();

}

XSECProvider::~XSECProvider() {

	SignatureListVectorType::iterator i;

	
	for (i = m_activeSignatures.begin(); i != m_activeSignatures.end(); ++i)
		delete *i;

	m_activeSignatures.clear();

	if (mp_URIResolver != NULL)
		delete mp_URIResolver;
}

// --------------------------------------------------------------------------------
//           Signature Creation/Deletion
// --------------------------------------------------------------------------------


DSIGSignature * XSECProvider::newSignatureFromDOM(DOMDocument *doc, DOMNode *sigNode) {

	DSIGSignature * ret;

	XSECnew(ret, DSIGSignature(doc, sigNode));

	setup(ret);

	return ret;

}

DSIGSignature * XSECProvider::newSignatureFromDOM(DOMDocument *doc) {

	DSIGSignature * ret;

	DOMNode *sigNode = findDSIGNode(doc, "Signature");

	if (sigNode == NULL) {
		
		throw XSECException(XSECException::SignatureCreationError,
			"Could not find a signature node in passed in DOM document");

	}

	XSECnew(ret, DSIGSignature(doc, sigNode));

	setup(ret);

	return ret;

}

DSIGSignature * XSECProvider::newSignature(void) {

	DSIGSignature * ret;

	XSECnew(ret, DSIGSignature());

	setup(ret);

	return ret;

}

void XSECProvider::releaseSignature(DSIGSignature * toRelease) {

	// Find in the active list

	SignatureListVectorType::iterator i;

	m_providerMutex.lock();
	i = m_activeSignatures.begin();
	while (i != m_activeSignatures.end() && *i != toRelease)
		++i;

	if (i == m_activeSignatures.end()) {

		m_providerMutex.unlock();

		throw XSECException(XSECException::ProviderError,
			"Attempt to release a signature that was not created by this provider");

	}
	
	// For now - remove from list.  Would be better to recycle
	m_activeSignatures.erase(i);
	m_providerMutex.unlock();
	delete toRelease;

}

// --------------------------------------------------------------------------------
//           Environmental methods
// --------------------------------------------------------------------------------


void XSECProvider::setDefaultURIResolver(XSECURIResolver * resolver) {

	if (mp_URIResolver != 0)
		delete mp_URIResolver;

	mp_URIResolver = resolver->clone();

}

// --------------------------------------------------------------------------------
//           Internal functions
// --------------------------------------------------------------------------------

void XSECProvider::setup(DSIGSignature *sig) {

	// Called by all Signature creation methods to set up the sig

	// Add to the active list
	m_providerMutex.lock();
	m_activeSignatures.push_back(sig);
	m_providerMutex.unlock();

	sig->setURIResolver(mp_URIResolver);

}