package org.apache.torque.avalon;
   
   /*
    * 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 java.io.File;
  import java.util.Iterator;
  import java.util.Map;
  
  import org.apache.avalon.framework.activity.Disposable;
  import org.apache.avalon.framework.activity.Initializable;
  import org.apache.avalon.framework.configuration.Configurable;
  import org.apache.avalon.framework.configuration.Configuration;
  import org.apache.avalon.framework.configuration.ConfigurationException;
  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.LogEnabled;
  import org.apache.avalon.framework.logger.Logger;
  import org.apache.avalon.framework.thread.ThreadSafe;
  import org.apache.commons.lang.StringUtils;
  import org.apache.torque.TorqueInstance;
  
  /***
   * Avalon component for Torque.
   *
   * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a>
   * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
   * @author <a href="mailto:tv@apache.org">Thomas Vandahl</a>
   * @version $Id: TorqueComponent.java 529759 2007-04-17 20:52:01Z tv $
   */
  public class TorqueComponent
          extends TorqueInstance
          implements Torque,
                     LogEnabled,
                     Configurable,
                     Initializable,
                     Contextualizable,
                     Disposable,
                     ThreadSafe
  {
      /*** The Avalon Application Root */
      private String appRoot = null;
  
      /*** The Avalon Logger */
      private Logger logger = null;
  
      /*** The configuration file name. */
      private String configFile = null;
  
      /*
       * ========================================================================
       *
       * Avalon Component Interfaces
       *
       * ========================================================================
       */
  
      /***
       * @see org.apache.avalon.framework.logger.LogEnabled#enableLogging(org.apache.avalon.framework.logger.Logger)
       */
      public void enableLogging(Logger aLogger)
      {
          this.logger = aLogger;
      }
  
      /***
       * Convenience method to provide the Avalon logger the way AbstractLogEnabled does.
       */
      public Logger getLogger()
      {
          return logger;
      }
  
      /***
       * @see
       * org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)
       */
      public void configure(Configuration configuration)
              throws ConfigurationException
      {
          getLogger().debug("configure(" + configuration + ")");
  
         String configurationFile
                 = configuration.getChild("configfile").getValue();
 
         if (StringUtils.isNotEmpty(appRoot))
         {
             if (configurationFile.startsWith("/"))
             {
                 configurationFile = configurationFile.substring(1);
                 getLogger().debug("Config File changes to "
                         + configurationFile);
             }
 
             StringBuffer sb = new StringBuffer();
             sb.append(appRoot);
             sb.append(File.separator);
             sb.append(configurationFile);
 
             configurationFile = sb.toString();
         }
 
         getLogger().debug("Config File is " + configurationFile);
 
         this.configFile = configurationFile;
     }
 
     /***
      * @see org.apache.avalon.framework.context.Contextualizable
      */
     public void contextualize(Context context)
             throws ContextException
     {
         // check context Merlin and YAAFI style
         try
         {
             appRoot = ((File) context.get("urn:avalon:home")).getAbsolutePath();
         }
         catch (ContextException ce)
         {
             appRoot = null;
         }
 
         if (appRoot == null)
         {
             // check context old ECM style, let exception flow if not available
             appRoot = (String) context.get("componentAppRoot");
         }
 
         if (StringUtils.isNotEmpty(appRoot))
         {
             if (appRoot.endsWith("/"))
             {
                 appRoot = appRoot.substring(0, appRoot.length() - 1);
                 getLogger().debug("Application Root changed to " + appRoot);
             }
         }
     }
 
     /***
      * @see org.apache.avalon.framework.activity.Initializable#initialize()
      */
     public void initialize()
             throws Exception
     {
         getLogger().debug("initialize()");
         
         TorqueInstance instance = org.apache.torque.Torque.getInstance();
         
         Map mapBuilders = instance.getMapBuilders();
         
         if (mapBuilders != null)
         {    
             // Copy the registered MapBuilders and take care that they will be built again
             for (Iterator  i = mapBuilders.keySet().iterator(); i.hasNext();)
             {
                 String className = (String)i.next();
                 registerMapBuilder(className);
             }
         }
         
         // Provide the singleton instance to the static accessor
         org.apache.torque.Torque.setInstance(this);
 
         init(configFile);
     }
 
     /***
      * @see org.apache.avalon.framework.activity.Disposable#dispose()
      */
     public void dispose()
     {
         getLogger().debug("dispose()");
         try
         {
             shutdown();
         }
         catch (Exception e)
         {
             getLogger().error("Error while stopping Torque", e);
         }
     }
 }