/*

  * 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.myfaces.config.annotation;

 import java.lang.reflect.InvocationTargetException;

 import java.lang.reflect.Method;

 import java.lang.reflect.Modifier;

 import javax.annotation.PostConstruct;

 import javax.annotation.PreDestroy;

 import javax.naming.NamingException;

 import org.apache.myfaces.shared_impl.util.ClassUtils;

 /**

  * See SRV.14.5 Servlet Specification Version 2.5 JSR 154

  * and Common Annotations for the Java Platform JSR 250

  */

 public class NoInjectionAnnotationLifecycleProvider implements LifecycleProvider2

 {

     public Object newInstance(String className)

            throws InstantiationException, IllegalAccessException, NamingException, InvocationTargetException, ClassNotFoundException

     {

         Class clazz = ClassUtils.classForName(className);

         Object object = clazz.newInstance();

         processAnnotations(object);

         //postConstruct(object);

         return object;

     }

     /**

      * Call postConstruct method on the specified instance.

      */

     public void postConstruct(Object instance)

             throws IllegalAccessException, InvocationTargetException

     {

         // TODO the servlet spec is not clear about searching in superclass??

         Method[] methods = instance.getClass().getDeclaredMethods();

         Method postConstruct = null;

         for (Method method : methods)

         {

             if (method.isAnnotationPresent(PostConstruct.class))

             {

                 // a method that does not take any arguments

                 // the method must not be static

                 // must not throw any checked expections

                 // the return value must be void

                 // the method may be public, protected, package private or private

                 if ((postConstruct != null)

                         || (method.getParameterTypes().length != 0)

                         || (Modifier.isStatic(method.getModifiers()))

                         || (method.getExceptionTypes().length > 0)

                         || (!method.getReturnType().getName().equals("void")))

                 {

                     throw new IllegalArgumentException("Invalid PostConstruct annotation");

                 }

                 postConstruct = method;

             }

         }

         invokeAnnotatedMethod(postConstruct, instance);

     }

     public void destroyInstance(Object instance)

             throws IllegalAccessException, InvocationTargetException

     {

         // TODO the servlet spec is not clear about searching in superclass??

         // May be only check non private fields and methods

         Method[] methods = instance.getClass().getDeclaredMethods();

         Method preDestroy = null;

         for (Method method : methods)

         {

             if (method.isAnnotationPresent(PreDestroy.class))

             {

                 // must not throw any checked expections

                 // the method must not be static

                 // must not throw any checked expections

                 // the return value must be void

                 // the method may be public, protected, package private or private

                 if ((preDestroy != null)

                         || (method.getParameterTypes().length != 0)

                         || (Modifier.isStatic(method.getModifiers()))

                         || (method.getExceptionTypes().length > 0)

                         || (!method.getReturnType().getName().equals("void")))

                 {

                     throw new IllegalArgumentException("Invalid PreDestroy annotation");

                 }

                 preDestroy = method;

             }

         }

         invokeAnnotatedMethod(preDestroy, instance);

     }

     private void invokeAnnotatedMethod(Method method, Object instance)

                 throws IllegalAccessException, InvocationTargetException

     {

         // At the end the annotated

         // method is invoked

         if (method != null)

         {

             boolean accessibility = method.isAccessible();

             method.setAccessible(true);

             method.invoke(instance);

             method.setAccessible(accessibility);

         }

     }

      /**

      * Inject resources in specified instance.

      */

     protected void processAnnotations(Object instance)

             throws IllegalAccessException, InvocationTargetException, NamingException

     {

     }

 }