package org.apache.maven.continuum.notification.manager.spring;
   
   /*
    * 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.
   */
  
  import org.apache.maven.continuum.notification.Notifier;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.BeansException;
  import org.springframework.beans.factory.BeanFactoryUtils;
  import org.springframework.beans.factory.BeanInitializationException;
  import org.springframework.beans.factory.FactoryBean;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.ApplicationContextAware;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
   * @version $Id: NotifierFactoryBean.java 1372260 2012-08-13 04:29:09Z brett $
   */
  public class NotifierFactoryBean
      implements FactoryBean, ApplicationContextAware
  {
      private static final Logger log = LoggerFactory.getLogger( NotifierFactoryBean.class );
  
      private ApplicationContext applicationContext;
  
      public Object getObject()
          throws Exception
      {
          Map<String, Notifier> notifiers = new HashMap<String, Notifier>();
  
          Map<String, Notifier> beans = BeanFactoryUtils.beansOfTypeIncludingAncestors( applicationContext,
                                                                                        Notifier.class );
  
          for ( Notifier notifier : beans.values() )
          {
  
              if ( notifiers.containsKey( notifier.getType() ) )
              {
                  throw new BeanInitializationException(
                      "There are two Notifier beans in the appllication context for Notifier type " + notifier.getType() +
                          ". Probably two conflicting scm implementations are present in the classpath." );
              }
  
              if ( log.isDebugEnabled() )
              {
                  log.debug(
                      "put provider with type " + notifier.getType() + " and class " + notifier.getClass().getName() );
              }
              notifiers.put( notifier.getType(), notifier );
          }
          return notifiers;
      }
  
      public Class getObjectType()
      {
          return Map.class;
      }
  
      public boolean isSingleton()
      {
          return true;
      }
  
      public void setApplicationContext( ApplicationContext applicationContext )
          throws BeansException
      {
          this.applicationContext = applicationContext;
      }
  }