content: /*
   * 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.aries.async.impl;
  
  import java.lang.reflect.InvocationTargetException;
  import java.security.AccessControlContext;
  import java.security.AccessController;
  import java.security.PrivilegedActionException;
  import java.security.PrivilegedExceptionAction;
  
  import org.apache.aries.async.promise.PromiseImpl;
  
  public class Work<T> implements Runnable {
  
  	private final MethodCall methodCall;
  	
  	private final PromiseImpl<T> promiseImpl;
  
  	private final AccessControlContext acc;
  	
  	public Work(MethodCall methodCall, PromiseImpl<T> promiseImpl) {
  		this.methodCall = methodCall;
  		this.promiseImpl = promiseImpl;
  		this.acc = AccessController.getContext();
  	}
  
  
  	public void run() {
  		try {
  			final Object service = methodCall.getService();
  			// This is necessary for non public methods. The original mediator call must
  			// have been allowed to happen, so this should always be safe.
  			methodCall.method.setAccessible(true);
  			
  			@SuppressWarnings("unchecked")
  			T returnValue = AccessController.doPrivileged(new PrivilegedExceptionAction<T>() {
  				public T run() throws Exception {
  					return (T) methodCall.method.invoke(service, methodCall.arguments);
  				}
  			}, acc);
  			
  			promiseImpl.resolve(returnValue);
  			
  		} catch (PrivilegedActionException pae) {
  			Throwable targetException = pae.getCause();
  			if(targetException instanceof InvocationTargetException) {
  				targetException = ((InvocationTargetException) targetException).getTargetException();
  			}
  			promiseImpl.fail(targetException);
  		} catch (Exception e) {
  			promiseImpl.fail(e);
  		} finally {
  			methodCall.releaseService();
  		}
  	}
  }
  