/*
    * 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.cdi.util;
  
  import java.lang.reflect.Type;
  import java.util.Set;
  
  import javax.enterprise.context.spi.CreationalContext;
  import javax.enterprise.inject.spi.Bean;
  import javax.enterprise.inject.spi.BeanManager;
  import javax.faces.context.ExternalContext;
  import org.apache.myfaces.webapp.AbstractFacesInitializer;
  
  /**
   * Lookup code for Contextual Instances.
   */
  public class CDIUtils
  {
      public static BeanManager getBeanManager(ExternalContext externalContext)
      {
          return (BeanManager) externalContext.getApplicationMap().get(
              AbstractFacesInitializer.CDI_BEAN_MANAGER_INSTANCE);
      }
  
  
  
      public static <T> T lookup(BeanManager bm, Class<T> clazz)
      {
          Set<Bean<?>> beans = bm.getBeans(clazz);
          return resolveInstance(bm, beans, clazz);
      }
  
      public static Object lookup(BeanManager bm, String name)
      {
          Set<Bean<?>> beans = bm.getBeans(name);
          return resolveInstance(bm, beans, Object.class);
      }
  
      private static <T> T resolveInstance(BeanManager bm, Set<Bean<?>> beans, Type type)
      {
          Bean<?> bean = bm.resolve(beans);
          CreationalContext<?> cc = bm.createCreationalContext(bean);
          T dao = (T) bm.getReference(bean, type, cc);
          return dao;
  
      }
  }