/* 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.acls.sid;

 import org.acegisecurity.GrantedAuthority;

 import org.springframework.util.Assert;

 /**

  * Represents a <code>GrantedAuthority</code> as a <code>Sid</code>.<p>This is a basic implementation that simply

  * uses the <code>String</code>-based principal for <code>Sid</code> comparison. More complex principal objects may

  * wish to provide an alternative <code>Sid</code> implementation that uses some other identifier.</p>

  *

  * @author Ben Alex

  * @version $Id: GrantedAuthoritySid.java 1754 2006-11-17 02:01:21Z benalex $

  */

 public class GrantedAuthoritySid implements Sid {

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

     private String grantedAuthority;

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

     public GrantedAuthoritySid(String grantedAuthority) {

         Assert.hasText(grantedAuthority, "GrantedAuthority required");

         this.grantedAuthority = grantedAuthority;

     }

     public GrantedAuthoritySid(GrantedAuthority grantedAuthority) {

         Assert.notNull(grantedAuthority, "GrantedAuthority required");

         Assert.notNull(grantedAuthority.getAuthority(),

             "This Sid is only compatible with GrantedAuthoritys that provide a non-null getAuthority()");

         this.grantedAuthority = grantedAuthority.getAuthority();

     }

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

     public boolean equals(Object object) {

         if ((object == null) || !(object instanceof GrantedAuthoritySid)) {

             return false;

         }

         // Delegate to getGrantedAuthority() to perform actual comparison (both should be identical) 

         return ((GrantedAuthoritySid) object).getGrantedAuthority().equals(this.getGrantedAuthority());

     }

     public String getGrantedAuthority() {

         return grantedAuthority;

     }

     public String toString() {

         return "GrantedAuthoritySid[" + this.grantedAuthority + "]";

     }

 }