SignatureReference.java

/*
 * Copyright(c) 2002 Center for E-Commerce Infrastructure Development, The
 * University of Hong Kong (HKU). All Rights Reserved.
 *
 * This software is licensed under the Academic Free License Version 1.0
 *
 * Academic Free License
 * Version 1.0
 *
 * This Academic Free License applies to any software and associated 
 * documentation (the "Software") whose owner (the "Licensor") has placed the 
 * statement "Licensed under the Academic Free License Version 1.0" immediately 
 * after the copyright notice that applies to the Software. 
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of the Software (1) to use, copy, modify, merge, publish, perform, 
 * distribute, sublicense, and/or sell copies of the Software, and to permit 
 * persons to whom the Software is furnished to do so, and (2) under patent 
 * claims owned or controlled by the Licensor that are embodied in the Software 
 * as furnished by the Licensor, to make, use, sell and offer for sale the 
 * Software and derivative works thereof, subject to the following conditions: 
 *
 * - Redistributions of the Software in source code form must retain all 
 *   copyright notices in the Software as furnished by the Licensor, this list 
 *   of conditions, and the following disclaimers. 
 * - Redistributions of the Software in executable form must reproduce all 
 *   copyright notices in the Software as furnished by the Licensor, this list 
 *   of conditions, and the following disclaimers in the documentation and/or 
 *   other materials provided with the distribution. 
 * - Neither the names of Licensor, nor the names of any contributors to the 
 *   Software, nor any of their trademarks or service marks, may be used to 
 *   endorse or promote products derived from this Software without express 
 *   prior written permission of the Licensor. 
 *
 * DISCLAIMERS: LICENSOR WARRANTS THAT THE COPYRIGHT IN AND TO THE SOFTWARE IS 
 * OWNED BY THE LICENSOR OR THAT THE SOFTWARE IS DISTRIBUTED BY LICENSOR UNDER 
 * A VALID CURRENT LICENSE. EXCEPT AS EXPRESSLY STATED IN THE IMMEDIATELY 
 * PRECEDING SENTENCE, THE SOFTWARE IS PROVIDED BY THE LICENSOR, CONTRIBUTORS 
 * AND COPYRIGHT OWNERS "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
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 *
 * This license is Copyright (C) 2002 Lawrence E. Rosen. All rights reserved. 
 * Permission is hereby granted to copy and distribute this license without 
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 */

/* ===== 
 *
 * $Header: /home/cvsroot/ebxml-pkg/src/hk/hku/cecid/ebms/pkg/SignatureReference.java,v 1.1 2005/07/28 09:36:24 dcmsze Exp $
 *
 * Code authored by:
 *
 * cyng [2003-04-15]
 *
 * Code reviewed by:
 *
 * username [YYYY-MM-DD]
 *
 * Remarks:
 *
 * =====
 */

package hk.hku.cecid.ebms.pkg;

import hk.hku.cecid.ebms.pkg.validation.SOAPValidationException;

import java.util.Iterator;

import javax.xml.soap.SOAPElement;
import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPException;
/**
 * <ds:Reference> element in <ds:Signature>.
 *
 * @author cyng
 * @version $Revision: 1.1 $
 */
public class SignatureReference extends HeaderElement {

    /** <ds:Reference> element name */
    static final String SIGNATURE_REFERENCE = "Reference";

    /** <ds:DigestValue> element name */
    static final String ELEMENT_DIGEST_VALUE = "DigestValue";

    /** URI attribute name */
    static final String ATTRIBUTE_URI = "URI";

    private final String uri;

    private final String digestValue;

    SignatureReference(SOAPEnvelope soapEnvelope, SOAPElement soapElement)
        throws SOAPException {
        super(soapEnvelope, soapElement);
        uri = getAttributeValue(ATTRIBUTE_URI, "", "");
        Iterator childElements = getChildElements(ELEMENT_DIGEST_VALUE);
        if (childElements.hasNext()) {
            digestValue = ((SOAPElement) childElements.next()).getValue();
        }
        else {
            throw new SOAPValidationException(SOAPValidationException.
                SOAP_FAULT_CLIENT, "<" + Signature.NAMESPACE_PREFIX_DS + ":" +
                ELEMENT_DIGEST_VALUE + "> is not found in <" + Signature.
                NAMESPACE_PREFIX_DS + ":" + SIGNATURE_REFERENCE + ">!");
        }
    }

    /** 
     * Gets URI attribute of this <ds:Reference>.
     * 
     * @return URI attribute of this <ds:Reference>.
     */
    public String getUri() {
        return uri;
    }

    /** 
     * Gets <ds:DigestValue> element of this <ds:Reference>.
     * 
     * @return <ds:DigestValue> element of this <ds:Reference>.
     */
    public String getDigestValue() {
        return digestValue;
    }
}