/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.acegisecurity.providers.anonymous;

 import org.acegisecurity.GrantedAuthority;

 import org.acegisecurity.providers.AbstractAuthenticationToken;

 import java.io.Serializable;

 /**

  * Represents an anonymous <code>Authentication</code>.

  *

  * @author Ben Alex

  * @version $Id: AnonymousAuthenticationToken.java 1784 2007-02-24 21:00:24Z luke_t $

  */

 public class AnonymousAuthenticationToken extends AbstractAuthenticationToken implements Serializable {

     //~ Instance fields ================================================================================================

     private static final long serialVersionUID = 1L;

     private Object principal;

     private int keyHash;

     //~ Constructors ===================================================================================================

 /**

      * Constructor.

      *

      * @param key to identify if this object made by an authorised client

      * @param principal the principal (typically a <code>UserDetails</code>)

      * @param authorities the authorities granted to the principal

      *

      * @throws IllegalArgumentException if a <code>null</code> was passed

      */

     public AnonymousAuthenticationToken(String key, Object principal, GrantedAuthority[] authorities) {

         super(authorities);

         if ((key == null) || ("".equals(key)) || (principal == null) || "".equals(principal) || (authorities == null)

             || (authorities.length == 0)) {

             throw new IllegalArgumentException("Cannot pass null or empty values to constructor");

         }

         this.keyHash = key.hashCode();

         this.principal = principal;

         setAuthenticated(true);

     }

     //~ Methods ========================================================================================================

     public boolean equals(Object obj) {

         if (!super.equals(obj)) {

             return false;

         }

         if (obj instanceof AnonymousAuthenticationToken) {

             AnonymousAuthenticationToken test = (AnonymousAuthenticationToken) obj;

             if (this.getKeyHash() != test.getKeyHash()) {

                 return false;

             }

             return true;

         }

         return false;

     }

     /**

      * Always returns an empty <code>String</code>

      *

      * @return an empty String

      */

     public Object getCredentials() {

         return "";

     }

     public int getKeyHash() {

         return this.keyHash;

     }

     public Object getPrincipal() {

         return this.principal;

     }

 }