cvs commit: jakarta-ant/proposal/myrmidon/src/java/org/apache/myrmidon/libs/runtime ConverterDef.java

[do...@apache.org]

donaldp     01/06/10 05:54:27

  Added:       proposal/myrmidon/src/java/org/apache/myrmidon/libs/runtime
                        ConverterDef.java
  Log:
  ConverterDef task (should we even have this???).
  
  Revision  Changes    Path
  1.1                  jakarta-ant/proposal/myrmidon/src/java/org/apache/myrmidon/libs/runtime/ConverterDef.java
  
  Index: ConverterDef.java
  ===================================================================
  /*
   * Copyright (C) The Apache Software Foundation. All rights reserved.
   *
   * This software is published under the terms of the Apache Software License
   * version 1.1, a copy of which has been included with this distribution in
   * the LICENSE file.
   */
  package org.apache.myrmidon.libs.runtime;
  
  import java.io.File;
  import java.net.MalformedURLException;
  import java.net.URL;
  import org.apache.avalon.framework.component.ComponentException;
  import org.apache.avalon.framework.component.ComponentManager;
  import org.apache.avalon.framework.component.Composable;
  import org.apache.myrmidon.api.AbstractTask;
  import org.apache.myrmidon.api.TaskException;
  import org.apache.myrmidon.components.converter.ConverterRegistry;
  import org.apache.myrmidon.components.type.DefaultTypeFactory;
  import org.apache.myrmidon.components.type.TypeManager;
  import org.apache.myrmidon.converter.Converter;
  
  /**
   * Task to define a converter.
   *
   * @author <a href="mailto:donaldp@apache.org">Peter Donald</a>
   */
  public class ConverterDef
      extends AbstractTask
      implements Composable
  {
      private String              m_sourceType;
      private String              m_destinationType;
      private String              m_lib;
      private String              m_classname;
      private ConverterRegistry   m_converterRegistry;
      private TypeManager         m_typeManager;
  
      public void compose( final ComponentManager componentManager )
          throws ComponentException
      {
          m_converterRegistry = (ConverterRegistry)componentManager.lookup( ConverterRegistry.ROLE );
          m_typeManager = (TypeManager)componentManager.lookup( TypeManager.ROLE );
      }
  
      public void setLib( final String lib )
      {
          m_lib = lib;
      }
  
      public void setClassname( final String classname )
      {
          m_classname = classname;
      }
  
      public void setSourceType( final String sourceType )
      {
          m_sourceType = sourceType;
      }
  
      public void setDestinationType( final String destinationType )
      {
          m_destinationType = destinationType;
      }
  
      public void execute()
          throws TaskException
      {
          if( null == m_classname )
          {
              throw new TaskException( "Must specify classname parameter" );
          }
          else if( null == m_sourceType )
          {
              throw new TaskException( "Must specify the source-type parameter" );
          }
          else if( null == m_destinationType )
          {
              throw new TaskException( "Must specify the destination-type parameter" );
          }
          else if( null == m_lib )
          {
              throw new TaskException( "Must specify the lib parameter" );
          }
  
          final File file = getContext().resolveFile( m_lib );
  
          try
          {
              m_converterRegistry.registerConverter( m_classname, m_sourceType, m_destinationType );
  
              final URL url = file.toURL();
              final DefaultTypeFactory factory = new DefaultTypeFactory( new URL[] { url } );
              factory.addNameClassMapping( m_classname, m_classname );
  
              m_typeManager.registerType( Converter.ROLE, m_classname, factory );
          }
          catch( final Exception e )
          {
              throw new TaskException( "Failed to register converter " + m_classname, e );
          }
      }
  }