/*

  * 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.shiro.guice;

 import com.google.inject.TypeLiteral;

 import com.google.inject.matcher.Matcher;

 import com.google.inject.spi.InjectionListener;

 import com.google.inject.spi.TypeEncounter;

 import com.google.inject.spi.TypeListener;

 import org.apache.shiro.util.Destroyable;

 import org.apache.shiro.util.Initializable;

 class LifecycleTypeListener implements TypeListener {

     public static final Matcher<TypeLiteral> MATCHER = InitializableInjectionListener.MATCHER.or(DestroyableInjectionListener.MATCHER);

     private DestroyableInjectionListener.DestroyableRegistry registry;

     public LifecycleTypeListener(DestroyableInjectionListener.DestroyableRegistry registry) {

         this.registry = registry;

     }

     public <I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter) {

         if (InitializableInjectionListener.MATCHER.matches(type)) {

             encounter.register(this.<I>castListener(new InitializableInjectionListener<Initializable>()));

         }

         if (DestroyableInjectionListener.MATCHER.matches(type)) {

             encounter.register(this.<I>castListener(new DestroyableInjectionListener<Destroyable>(registry)));

         }

     }

     @SuppressWarnings({"unchecked"})

     private <I> InjectionListener<? super I> castListener(InjectionListener<?> listener) {

         return (InjectionListener<? super I>) listener;

     }

 }