/*

  * 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.shindig.social.core.util;

 import com.google.inject.Injector;

 import java.lang.reflect.InvocationTargetException;

 import net.sf.json.JSONObject;

 import net.sf.json.util.NewBeanInstanceStrategy;

 /**

  * An Injector based NewBeanInstance strategy that will use Guice to create new

  * beans.

  */

 public class InjectorBeanInstanceStrategy extends NewBeanInstanceStrategy {

   /**

    * The injector to use to create beans.

    */

   private Injector injector;

   /**

    * Constructor.

    *

    * @param injector

    *                The injector to use.

    */

   public InjectorBeanInstanceStrategy(Injector injector) {

     this.injector = injector;

   }

   /**

    * create a new instance of the requested bean using Guice.

    *

    * @param beanClass

    *                The bean class to create and instance of

    * @param jsonObject

    *                the json object to base that instance on

    * @return a new instance of the request class

    * @throws InstantiationException when the object cant be created

    * @throws IllegalAccessException when permission is denied to the class

    * @throws NoSuchMethodException when the constructor or one of the injectors has gone missing

    * @throws InvocationTargetException when the invocation method fails to invoke

    */

   @SuppressWarnings("unchecked")

   @Override

   public Object newInstance(Class beanClass, JSONObject jsonObject) throws InstantiationException,

       IllegalAccessException, NoSuchMethodException, InvocationTargetException {

     if (beanClass != null) {

       return injector.getInstance(beanClass);

     }

     return DEFAULT.newInstance(null, jsonObject);

   }

 }