Multicaster


1   /*****************************************************************************
2    * Copyright (C) NanoContainer Organization. All rights reserved.            *
3    * ------------------------------------------------------------------------- *
4    * The software in this package is published under the terms of the BSD      *
5    * style license a copy of which has been included with this distribution in *
6    * the LICENSE.txt file.                                                     *
7    *                                                                           *
8    * Original code by Aslak Hellesoy & Joerg Schaible                                       *
9    *****************************************************************************/
10  package org.picocontainer.gems.util;
11  
12  import com.thoughtworks.proxy.ProxyFactory;
13  import com.thoughtworks.proxy.toys.multicast.Multicasting;
14  import org.picocontainer.PicoContainer;
15  
16  import java.util.ArrayList  ;
17  import java.util.Collections  ;
18  import java.util.List  ;
19  
20  /**
21   * Factory for creating a multicaster object that multicasts calls to all
22   * components in a PicoContainer instance.
23   *
24   * @author Aslak Helles&oslash;y
25   * @author Chris Stevenson
26   * @author Paul Hammant
27   * @since 1.2
28   */
29  public class Multicaster {
30      /**
31       * Create a {@link Multicasting} proxy for the components of a {@link PicoContainer}.
32       * 
33       * @param pico the container
34       * @param callInInstantiationOrder <code>true</code> if the components will be called in instantiation order
35       * @param proxyFactory the ProxyFactory to use
36       * @return the Multicasting proxy
37       * @since 1.2
38       */
39      public static Object   object(PicoContainer pico, boolean callInInstantiationOrder, ProxyFactory proxyFactory) {
40          List   copy = new ArrayList  (pico.getComponentInstances());
41  
42          if (!callInInstantiationOrder) {
43              // reverse the list
44              Collections.reverse(copy);
45          }
46          Object  [] targets = copy.toArray();
47          return Multicasting.object(proxyFactory, targets);
48      }
49  }
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