cvs commit: jakarta-avalon-excalibur/fortress/src/java/org/apache/excalibur/fortress/handler PassThroughInvocationHandler.java

[do...@apache.org]

donaldp     2002/11/08 20:01:38

  Added:       fortress/src/java/org/apache/excalibur/fortress/handler
                        PassThroughInvocationHandler.java
  Log:
  Add in simple PassThrough InvocationHandler
  
  Revision  Changes    Path
  1.1                  jakarta-avalon-excalibur/fortress/src/java/org/apache/excalibur/fortress/handler/PassThroughInvocationHandler.java
  
  Index: PassThroughInvocationHandler.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.txt file.
   */
  package org.apache.excalibur.fortress.handler;
  
  import java.lang.reflect.InvocationHandler;
  import java.lang.reflect.Method;
  import java.lang.reflect.InvocationTargetException;
  
  /**
   * InvocationHandler that just passes on all methods to target object.
   *
   * @author <a href="mailto:peter at apache.org">Peter Donald</a>
   */
  final class PassThroughInvocationHandler
      implements InvocationHandler
  {
      private final Object m_object;
  
      /**
       * Create an Invocation handler for specified object.
       *
       * @param object the object to delegate to
       */
      public PassThroughInvocationHandler( final Object object )
      {
          if( null == object )
          {
              throw new NullPointerException( "object" );
          }
  
          m_object = object;
      }
  
      /**
       * Invoke the appropriate method on underlying object.
       *
       * @param proxy the proxy object
       * @param meth the method
       * @param args the arguments
       * @return the return value of object
       * @throws Throwable method throws an exception
       */
      public Object invoke( final Object proxy,
                            final Method meth,
                            final Object[] args )
          throws Throwable
      {
          try
          {
              return meth.invoke( m_object, args );
          }
          catch( final InvocationTargetException ite )
          {
              throw ite.getTargetException();
          }
      }
  
      /**
       * Retrieve the underlying object delegated to.
       *
       * @return the object delegated to
       */
      Object getObject()
      {
          return m_object;
      }
  }
  
  
  

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