Coverage Report - org.mule.util.expression.MessageExpressionEvaluator
 
Classes in this File Line Coverage Branch Coverage Complexity
MessageExpressionEvaluator
90%
28/31
92%
22/24
9.333
 
 1  
 /*
 2  
  * $Id: MessageExpressionEvaluator.java 12067 2008-06-16 13:53:26Z dirk.olmes $
 3  
  * --------------------------------------------------------------------------------------
 4  
  * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.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.util.expression;
 12  
 
 13  
 import org.mule.api.ExceptionPayload;
 14  
 import org.mule.api.MuleMessage;
 15  
 import org.mule.api.transport.MessageAdapter;
 16  
 import org.mule.util.StringUtils;
 17  
 
 18  
 import org.apache.commons.logging.Log;
 19  
 import org.apache.commons.logging.LogFactory;
 20  
 
 21  
 /**
 22  
  * Returns properties on the MuleMessage itself. The supported expressions map directly to methods on the message.
 23  
  * For example:
 24  
  * <ul>
 25  
  * <li>id - returns the value of {@link org.mule.api.MuleMessage#getUniqueId()}</li>
 26  
  * <li>correlationId - returns the value of {@link org.mule.api.MuleMessage#getCorrelationId()}</li>
 27  
  * <li>correlationGroupSize - returns the value of {@link org.mule.api.MuleMessage#getCorrelationGroupSize()}</li>
 28  
  * <li>correlationSequence - returns the value of {@link org.mule.api.MuleMessage#getCorrelationSequence()}</li>
 29  
  * <li>replyTo - returns the value of {@link org.mule.api.MuleMessage#getReplyTo()}</li>
 30  
  * <li>payload - returns the value of {@link org.mule.api.MuleMessage#getPayload()}</li>
 31  
  * <li>encoding - returns the value of {@link org.mule.api.MuleMessage#getEncoding()}</li>
 32  
  * <li>exception - returns the value of {@link org.mule.api.MuleMessage#getExceptionPayload().getException()} or null if there is no exception payload</li>
 33  
  * </ul>
 34  
  * If no expression is set the MuleMessage itself will be returned.
 35  
  * <p/>
 36  
  * If the object passed in is not a MuleMessage, the same object will be returned.
 37  
  *
 38  
  * @see org.mule.util.expression.ExpressionEvaluator
 39  
  * @see org.mule.util.expression.ExpressionEvaluatorManager
 40  
  */
 41  1148
 public class MessageExpressionEvaluator implements ExpressionEvaluator
 42  
 {
 43  
     public static final String NAME = "message";
 44  
 
 45  
     /**
 46  
      * logger used by this class
 47  
      */
 48  1148
     protected transient final Log logger = LogFactory.getLog(MessagePayloadExpressionEvaluator.class);
 49  
 
 50  
     public Object evaluate(String expression, Object message)
 51  
     {
 52  56
         if (message instanceof MuleMessage)
 53  
         {
 54  52
             if (StringUtils.isEmpty(expression))
 55  
             {
 56  2
                 return message;
 57  
             }
 58  
             else
 59  
             {
 60  50
                 if (expression.equals("id"))
 61  
                 {
 62  18
                     return ((MuleMessage) message).getUniqueId();
 63  
                 }
 64  32
                 else if (expression.equals("correlationId"))
 65  
                 {
 66  4
                     return ((MuleMessage) message).getCorrelationId();
 67  
                 }
 68  28
                 else if (expression.equals("correlationSequence"))
 69  
                 {
 70  4
                     return new Integer(((MuleMessage) message).getCorrelationSequence());
 71  
                 }
 72  24
                 else if (expression.equals("correlationGroupSize"))
 73  
                 {
 74  4
                     return new Integer(((MuleMessage) message).getCorrelationGroupSize());
 75  
                 }
 76  20
                 else if (expression.equals("replyTo"))
 77  
                 {
 78  4
                     return ((MuleMessage) message).getReplyTo();
 79  
                 }
 80  16
                 else if (expression.equals("payload"))
 81  
                 {
 82  4
                     return ((MuleMessage) message).getPayload();
 83  
                 }
 84  12
                 else if (expression.equals("encoding"))
 85  
                 {
 86  4
                     return ((MuleMessage) message).getEncoding();
 87  
                 }
 88  8
                 else if (expression.equals("exception"))
 89  
                 {
 90  4
                     ExceptionPayload ep = ((MuleMessage) message).getExceptionPayload();
 91  4
                     if (ep != null)
 92  
                     {
 93  4
                         return ep.getException();
 94  
                     }
 95  0
                     return null;
 96  
                 }
 97  
                 else
 98  
                 {
 99  4
                     throw new IllegalArgumentException(expression);
 100  
                 }
 101  
 
 102  
             }
 103  
         }
 104  
         else
 105  
         {
 106  4
             logger.warn("Message is not of type MuleMessage, the expression will return the object without modification");
 107  4
             if (message instanceof MessageAdapter)
 108  
             {
 109  0
                 return ((MessageAdapter) message).getPayload();
 110  
             }
 111  
         }
 112  4
         return message;
 113  
 
 114  
     }
 115  
 
 116  
     /**
 117  
      * {@inheritDoc}
 118  
      */
 119  
     public String getName()
 120  
     {
 121  1146
         return NAME;
 122  
     }
 123  
 
 124  
     /**
 125  
      * {@inheritDoc}
 126  
      */
 127  
     public void setName(String name)
 128  
     {
 129  0
         throw new UnsupportedOperationException("setName");
 130  
     }
 131  
 }