/*

  * 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.spi.impl;

 import java.lang.reflect.InvocationTargetException;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import javax.faces.context.ExternalContext;

 import javax.naming.NamingException;

 import javax.servlet.ServletContext;

 import org.apache.myfaces.spi.InjectionProvider;

 import org.apache.myfaces.spi.InjectionProviderException;

 public class TomcatAnnotationInjectionProvider extends InjectionProvider

 {

     private static Logger log = Logger.getLogger(TomcatAnnotationInjectionProvider.class.getName());

     private ExternalContext externalContext;

     private org.apache.AnnotationProcessor annotationProcessor;

     public TomcatAnnotationInjectionProvider(ExternalContext externalContext)

     {

         this.externalContext = externalContext;

     }

     @Override

     public Object inject(Object instance) throws InjectionProviderException

     {

         try

         {

             annotationProcessor.processAnnotations(instance);

         }

         catch (IllegalAccessException ex)

         {

             throw new InjectionProviderException(ex);

         }

         catch (InvocationTargetException ex)

         {

             throw new InjectionProviderException(ex);

         }

         catch (NamingException ex)

         {

             throw new InjectionProviderException(ex);

         }

         return null;

     }

     @Override

     public void preDestroy(Object instance, Object creationMetaData) throws InjectionProviderException

     {

         if (log.isLoggable(Level.FINEST))

         {

             log.info("Destroy instance of " + instance.getClass().getName());

         }

         try

         {

             annotationProcessor.preDestroy(instance);

         }

         catch (IllegalAccessException ex)

         {

             throw new InjectionProviderException(ex);

         }

         catch (InvocationTargetException ex)

         {

             throw new InjectionProviderException(ex);

         }

     }

     @Override

     public boolean isAvailable()

     {

         try

         {

             annotationProcessor =  (org.apache.AnnotationProcessor) ((ServletContext)

                      externalContext.getContext()).getAttribute(org.apache.AnnotationProcessor.class.getName());

             return annotationProcessor != null;

         }

         catch (Throwable e)

         {

             // ignore

         }

         return false;

     }

     @Override

     public void postConstruct(Object instance, Object creationMetaData) throws InjectionProviderException

     {

         try

         {

             annotationProcessor.postConstruct(instance);

         }

         catch (IllegalAccessException ex)

         {

             throw new InjectionProviderException(ex);

         }

         catch (InvocationTargetException ex)

         {

             throw new InjectionProviderException(ex);

         }

     }

 }