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1   /*
2    * $Id$
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.routing;
12  
13  import java.util.Collection;
14  import java.util.Collections;
15  
16  import org.mule.api.MuleEvent;
17  import org.mule.api.processor.MessageProcessor;
18  import org.mule.api.routing.RoutePathNotFoundException;
19  import org.mule.api.routing.filter.Filter;
20  
21  /**
22   * Routes the event to a single<code>MessageProcessor</code> using a {@link Filter}
23   * to evaluate the event being processed and find the first route that can be used.
24   * <p>
25   * If a default route has been configured and no match has been found, the default
26   * route will be used. Otherwise it throws a {@link RoutePathNotFoundException}.
27   */
28  public class ChoiceRouter extends AbstractSelectiveRouter
29  {
30      @Override
31      protected Collection<MessageProcessor> selectProcessors(MuleEvent event)
32      {
33          for (MessageProcessorFilterPair mpfp : getConditionalMessageProcessors())
34          {
35              if (mpfp.getFilter().accept(event.getMessage()))
36              {
37                  return Collections.singleton(mpfp.getMessageProcessor());
38              }
39          }
40  
41          return Collections.emptySet();
42      }
43  }