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1   /*
2    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
3    * The software in this package is published under the terms of the CPAL v1.0
4    * license, a copy of which has been included with this distribution in the
5    * LICENSE.txt file.
6    */
7   package org.mule.component.simple;
8   
9   import org.mule.api.MuleEventContext;
10  import org.mule.api.lifecycle.Callable;
11  
12  /**
13   * <code>NullComponent</code> is a service that is used as a placeholder. This
14   * implementation will throw an exception if a message is received for it.
15   */
16  public class NullComponent implements Callable
17  {
18  
19      public Object onCall(MuleEventContext context) throws Exception
20      {
21          throw new UnsupportedOperationException("This service cannot receive messages. Service is: "
22                                                  + context.getFlowConstruct().getName());
23      }
24  
25  }