/* 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;

 /**

  * Makes a final access control (authorization) decision.

  *

  * @author Ben Alex

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

  */

 public interface AccessDecisionManager {

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

     /**

      * Resolves an access control decision for the passed parameters.

      *

      * @param authentication the caller invoking the method

      * @param object the secured object being called

      * @param config the configuration attributes associated with the secured object being invoked

      *

      * @throws AccessDeniedException if access is denied as the authentication does not hold a required authority or

      *         ACL privilege

      * @throws InsufficientAuthenticationException if access is denied as the authentication does not provide a

      *         sufficient level of trust

      */

     void decide(Authentication authentication, Object object, ConfigAttributeDefinition config)

         throws AccessDeniedException, InsufficientAuthenticationException;

     /**

      * Indicates whether this <code>AccessDecisionManager</code> is able to process authorization requests

      * presented with the passed <code>ConfigAttribute</code>.<p>This allows the

      * <code>AbstractSecurityInterceptor</code> to check every configuration attribute can be consumed by the

      * configured <code>AccessDecisionManager</code> and/or <code>RunAsManager</code> and/or

      * <code>AfterInvocationManager</code>.</p>

      *

      * @param attribute a configuration attribute that has been configured against the

      *        <code>AbstractSecurityInterceptor</code>

      *

      * @return true if this <code>AccessDecisionManager</code> can support the passed configuration attribute

      */

     boolean supports(ConfigAttribute attribute);

     /**

      * Indicates whether the <code>AccessDecisionManager</code> implementation is able to provide access

      * control decisions for the indicated secured object type.

      *

      * @param clazz the class that is being queried

      *

      * @return <code>true</code> if the implementation can process the indicated class

      */

     boolean supports(Class clazz);

 }