cvs commit: jakarta-avalon/src/java/org/apache/avalon/camelot SimpleFactory.java

[do...@apache.org]

donaldp     01/04/14 22:39:32

  Added:       src/java/org/apache/avalon/camelot SimpleFactory.java
  Log:
  Add a simple factory that just loads components from a classloader.
  
  Revision  Changes    Path
  1.1                  jakarta-avalon/src/java/org/apache/avalon/camelot/SimpleFactory.java
  
  Index: SimpleFactory.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.avalon.camelot;
  
  import java.net.URL;
  
  /**
   * This is the component that creates the components. 
   *
   * @author <a href="mailto:donaldp@apache.org">Peter Donald</a>
   */
  public class SimpleFactory
      implements Factory
  {
      private final ClassLoader    m_classLoader;
  
      public SimpleFactory( final ClassLoader classLoader )
      {
          m_classLoader = classLoader;
      }
  
      /**
       * Create a component whos position is indicated by locator.
       *
       * @param locator the locator indicating the component location
       * @return the component
       * @exception FactoryException if an error occurs
       */
      public Object create( final Locator locator )
          throws FactoryException
      {
          try
          {
              final Class clazz = m_classLoader.loadClass( locator.getName() );
              return clazz.newInstance();
          }
          catch( final Exception e )
          {
              throw new FactoryException( "Unable to create " + locator.getName() +
                                          " from " + locator.getLocation(), e );
          }
      }
  
      public Object create( final Locator locator, final Class clazz )
          throws FactoryException
      {
          final Object object = create( locator );
  
          if( !clazz.isInstance( object ) )
          {
              throw new FactoryException( "Created object of type " + object.getClass().getName() +
                                          " not compatable with type " + clazz.getName() );
          }
  
          return object;
      }
  }
  
  
  

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