/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.apache.onami.factoryannotation;

 import java.lang.reflect.AccessibleObject;

 import java.security.AccessController;

 import java.security.PrivilegedAction;

 class AccessibleHelper<T extends AccessibleObject>

     implements PrivilegedAction<T>

 {

     private final T object;

     private final AccessibleHelperCallback<T> callback;

     public AccessibleHelper( final T object, final AccessibleHelperCallback<T> callback )

     {

         this.object = object;

         this.callback = callback;

     }

     public T run()

     {

         final boolean accessible = object.isAccessible();

         if ( !accessible )

         {

             object.setAccessible( true );

         }

         callback.execute( object );

         object.setAccessible( accessible );

         return object;

     }

     public static final <T extends AccessibleObject> void executePrivileged( final T object,

                                                                              final AccessibleHelperCallback<T> callback )

     {

         AccessController.doPrivileged( new AccessibleHelper<T>( object, callback ) );

     }

     static interface AccessibleHelperCallback<T>

     {

         void execute( T accessibleObject );

     }

 }