package org.apache.fulcrum.servicemanager;

 /*

  * 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.avalon.framework.activity.Disposable;

 import org.apache.avalon.framework.context.Context;

 import org.apache.avalon.framework.context.ContextException;

 import org.apache.avalon.framework.context.Contextualizable;

 import org.apache.avalon.framework.logger.Logger;

 import org.apache.avalon.framework.logger.LogEnabled;

 import org.apache.avalon.framework.parameters.ParameterException;

 import org.apache.avalon.framework.parameters.Parameterizable;

 import org.apache.avalon.framework.parameters.Parameters;

 import org.apache.avalon.framework.service.ServiceException;

 import org.apache.avalon.framework.service.ServiceManager;

 import org.apache.avalon.framework.service.Serviceable;

 import org.apache.avalon.framework.configuration.Configuration;

 import org.apache.avalon.framework.configuration.ConfigurationException;

 import org.apache.avalon.framework.configuration.Reconfigurable;

 /**

  * This is a sort of "edelhack" to solve the problem of accessing

  * the Avalon infrastructure without having an instance of the

  * container. The implementation stores the very first instance

  * of itself in a static variable which can be accessed using

  * getInstance().

  *

  * This allows access to the various Avalon artifacts.

  *

  *  @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>

  */

 public class ServiceManagerServiceImpl

     implements ServiceManagerService, LogEnabled, Contextualizable, Reconfigurable, Parameterizable, Serviceable, Disposable

 {

     /** The one and only instance */

     private static ServiceManagerServiceImpl instance;

     /** Store the Avalon logger */

     private Logger logger;

     /** Store the ServiceContainer on a per instance base */

     private ServiceManager serviceManager;

     /** Store the passed parameters on a per instance base */

     private Parameters parameters;

     /** Store the passed context on a per instance base */

     private Context context;

     /** Store the passed configuration on a per instance base */

     private Configuration configuration;

     /**

      * Constructor

      */

     public ServiceManagerServiceImpl()

     {

         setInstance(this);

     }

     /////////////////////////////////////////////////////////////////////////

     // Avalon Lifecycle Implementation

     /////////////////////////////////////////////////////////////////////////

     /**

      * @see org.apache.avalon.framework.logger.LogEnabled#enableLogging(org.apache.avalon.framework.logger.Logger)

      */

     public void enableLogging(Logger logger)

     {

         this.logger = logger;

     }

     /**

      * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)

      */

     public void service(ServiceManager serviceManager) throws ServiceException

     {

         this.serviceManager = serviceManager;

     }

     /**

      * @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)

      */

     public void contextualize(Context context) throws ContextException

     {

         this.context = context;

     }

     /**

      * @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)

      */

     public void configure(Configuration configuration) throws ConfigurationException

     {

         this.configuration = configuration;

     }

     /**

      * @see org.apache.avalon.framework.configuration.Reconfigurable#reconfigure(org.apache.avalon.framework.configuration.Configuration)

      */

     public void reconfigure(Configuration configuration) throws ConfigurationException

     {

         this.configuration = configuration;

     }

     /**

      * @see org.apache.avalon.framework.parameters.Parameterizable#parameterize(org.apache.avalon.framework.parameters.Parameters)

      */

     public void parameterize(Parameters parameters) throws ParameterException

     {

         this.parameters = parameters;

     }

     /**

      * @see org.apache.avalon.framework.activity.Disposable#dispose()

      */

     public void dispose()

     {

         this.serviceManager = null;

         this.parameters = null;

         this.context = null;

         this.configuration = null;

         this.logger = null;

         ServiceManagerServiceImpl.instance = null;

     }

     /////////////////////////////////////////////////////////////////////////

     // Service Interface Implementation

     /////////////////////////////////////////////////////////////////////////

     /**

      * @see org.apache.avalon.framework.service.ServiceManager#hasService(java.lang.String)

      */

     public boolean hasService(String name)

     {

         return this.serviceManager.hasService(name);

     }

     /**

      * @see org.apache.avalon.framework.service.ServiceManager#lookup(java.lang.String)

      */

     public Object lookup(String name) throws ServiceException

     {

         return this.serviceManager.lookup(name);

     }

     /**

      * @see org.apache.avalon.framework.service.ServiceManager#release(java.lang.Object)

      */

     public void release(Object object)

     {

         this.serviceManager.release(object);

     }

     /**

      * @return the ServiceManager for the container

      */

     public ServiceManager getServiceManager()

     {

         return this.serviceManager;

     }

     /**

      * @return the Parameters for the container

      */

     public Parameters getParameters()

     {

         return this.parameters;

     }

     /**

      * @return the Context for the container

      */

     public Context getContext()

     {

         return this.context;

     }

     /**

      * @see org.apache.fulcrum.servicemanager.ServiceManagerService#getLogger()

      */

     public Logger getLogger()

     {

         return this.logger;

     }

     /**

      * @see org.apache.fulcrum.servicemanager.ServiceManagerService#getConfiguration()

      */    

     public Configuration getConfiguration()

     {

         return this.configuration;

     }

     /////////////////////////////////////////////////////////////////////////

     // Service Implementation

     /////////////////////////////////////////////////////////////////////////

     /**

      * @return the one and only instance of this class

      */

     public static synchronized ServiceManagerService getInstance()

     {

         return instance;

     }

     /**

      * Create the one and only instance

      * @param instance the instance

      */

     protected static synchronized void setInstance( ServiceManagerServiceImpl instance )

     {

         ServiceManagerServiceImpl.instance = instance;

     }

 }