noassertion.java

一个完整的XACML工程,学习XACML技术的好例子!

/*
* Copyright (c) 2006, University of Kent
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without 
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this 
* list of conditions and the following disclaimer.
* 
* 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. 
*
* 1. Neither the name of the University of Kent nor the names of its 
* contributors may be used to endorse or promote products derived from this 
* software without specific prior written permission. 
*
* 2. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS  
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
* PURPOSE ARE DISCLAIMED. 
*
* 3. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 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.
*
* 4. YOU AGREE THAT THE EXCLUSIONS IN PARAGRAPHS 2 AND 3 ABOVE ARE REASONABLE
* IN THE CIRCUMSTANCES.  IN PARTICULAR, YOU ACKNOWLEDGE (1) THAT THIS
* SOFTWARE HAS BEEN MADE AVAILABLE TO YOU FREE OF CHARGE, (2) THAT THIS
* SOFTWARE IS NOT "PRODUCT" QUALITY, BUT HAS BEEN PRODUCED BY A RESEARCH
* GROUP WHO DESIRE TO MAKE THIS SOFTWARE FREELY AVAILABLE TO PEOPLE WHO WISH
* TO USE IT, AND (3) THAT BECAUSE THIS SOFTWARE IS NOT OF "PRODUCT" QUALITY
* IT IS INEVITABLE THAT THERE WILL BE BUGS AND ERRORS, AND POSSIBLY MORE
* SERIOUS FAULTS, IN THIS SOFTWARE.
*
* 5. This license is governed, except to the extent that local laws
* necessarily apply, by the laws of England and Wales.
*/

/*
 * NoAssertion.java
 *
 * Created on March 23, 2005, 11:17 AM
 */

package issrg.ac.attributes;

import iaik.asn1.*;
import iaik.asn1.structures.*;

/**
 *
 * @author  anhnt
 */
public class NoAssertion extends issrg.ac.Extension {
    
    /**
     *The string stores the standard OID for the NoAssertion extension: 2.5.29.62
     */
    public static final String NO_ASSERTION_OID = "2.5.29.62";
    
    /**
   * This method registers this extension as an extension with a specific
   * OID. After it has been registered, Extensions can recognise 
   * the extension with this OID.
   */
    
    public static void registerMe() {
        issrg.ac.Extensions.registerExtension(NO_ASSERTION_OID, NoAssertion.class);
    }
    
    /** Creates a new instance of NoAssertion based on an 
     *existing NoAssertion extension
     *
     *@param e is an existing NoAssertion extension
     */
    
    public NoAssertion(NoAssertion e) {
      this();
    }
    
    /**
     *This method creates a default NoAssertion object.
     */
    
    public NoAssertion () {
      super(NO_ASSERTION_OID, true);
    }

    public Object clone() {
      return new NoAssertion(this);
    }
    
    /**
     * This method constructs an NoAssertion extension based on an ASN1Object object
     *@param ao is the ASN1Object object that is used to construct the NoAssertion object.
     */
    
    
  public NoAssertion(ASN1Object ao) throws CodingException{
    super(ao);
  }
 
  /**
   *This method encodes the extension value of the object.
   *@return an ASN1Object that represents the extension value of the object.
   */
 
  public ASN1Object encodeValue() {
    return Null;
  }

  /**
   *This method decodes an ASN1Object to get the extension value for the object.
   *
   *@param ao is an ASN1Object that is going to be decoded to get the extension value.
   */
  
  public void decodeValue(ASN1Object ao) throws CodingException{
    super.decodeValue(ao);
    if (!(ao instanceof NULL)) throw new CodingException("NULL was expected as the value of NoAssertion extension");
  }
  
  
  public String extensionValueToString(String ident){
      return "NULL";      
  }
}