Coverage Report - org.mule.expression.MessagePayloadExpressionEvaluator
 
Classes in this File Line Coverage Branch Coverage Complexity
MessagePayloadExpressionEvaluator
0%
0/16
0%
0/6
4
 
 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.expression;
 8  
 
 9  
 import org.mule.api.MuleContext;
 10  
 import org.mule.api.MuleMessage;
 11  
 import org.mule.api.MuleRuntimeException;
 12  
 import org.mule.api.context.MuleContextAware;
 13  
 import org.mule.api.expression.ExpressionEvaluator;
 14  
 import org.mule.api.transformer.DataType;
 15  
 import org.mule.api.transformer.TransformerException;
 16  
 import org.mule.config.i18n.CoreMessages;
 17  
 import org.mule.transformer.types.DataTypeFactory;
 18  
 import org.mule.util.ClassUtils;
 19  
 import org.mule.util.StringUtils;
 20  
 
 21  
 import org.apache.commons.logging.Log;
 22  
 import org.apache.commons.logging.LogFactory;
 23  
 
 24  
 /**
 25  
  * Returns the message payload.  If the expression is set to a class name then Mule will attempt to transform the payload by
 26  
  * discovering the correct transformer(s) in the registry. This is only suited for simple transformations between common types.
 27  
  * <p/>
 28  
  * <code>
 29  
  * #[payload:byte[]]
 30  
  * </code>
 31  
  * <p/>
 32  
  * or
 33  
  * <p/>
 34  
  * <code>
 35  
  * #[payload:org.mule.api.OutputHandler]
 36  
  * </code>
 37  
  * <p/>
 38  
  * If the object passed in is not a MuleMessage, the same object will be returned.
 39  
  *
 40  
  * @see org.mule.api.expression.ExpressionEvaluator
 41  
  * @see DefaultExpressionManager
 42  
  */
 43  0
 public class MessagePayloadExpressionEvaluator implements ExpressionEvaluator, MuleContextAware
 44  
 {
 45  
     public static final String NAME = "payload";
 46  
     public static final String BYTE_ARRAY = "byte[]";
 47  
 
 48  
     /**
 49  
      * logger used by this class
 50  
      */
 51  0
     protected transient final Log logger = LogFactory.getLog(MessagePayloadExpressionEvaluator.class);
 52  
 
 53  
     protected MuleContext muleContext;
 54  
 
 55  
     public void setMuleContext(MuleContext context)
 56  
     {
 57  0
         this.muleContext = context;
 58  0
     }
 59  
 
 60  
     public Object evaluate(String expression, MuleMessage message)
 61  
     {
 62  0
         if(message==null) return null;
 63  
         
 64  0
         if (StringUtils.isEmpty(expression))
 65  
         {
 66  0
             return message.getPayload();
 67  
         }
 68  
         else
 69  
         {
 70  
             try
 71  
             {
 72  0
                 if (expression.equals(BYTE_ARRAY))
 73  
                 {
 74  0
                     return message.getPayload(DataType.BYTE_ARRAY_DATA_TYPE);
 75  
                 }
 76  
                 else
 77  
                 {
 78  0
                     return message.getPayload(DataTypeFactory.create(ClassUtils.loadClass(expression, getClass())));
 79  
                 }
 80  
             }
 81  0
             catch (TransformerException e)
 82  
             {
 83  0
                 throw new MuleRuntimeException(CoreMessages.failedToProcessExtractorFunction(expression), e);
 84  
             }
 85  0
             catch (ClassNotFoundException e)
 86  
             {
 87  0
                 throw new MuleRuntimeException(CoreMessages.failedToProcessExtractorFunction(expression), e);
 88  
             }
 89  
         }
 90  
     }
 91  
 
 92  
     /**
 93  
      * {@inheritDoc}
 94  
      */
 95  
     public String getName()
 96  
     {
 97  0
         return NAME;
 98  
     }
 99  
 
 100  
     /**
 101  
      * {@inheritDoc}
 102  
      */
 103  
     public void setName(String name)
 104  
     {
 105  0
         throw new UnsupportedOperationException();
 106  
     }
 107  
 }