org.mule.expression
Class MessageExpressionEvaluator

java.lang.Object
  extended by org.mule.expression.MessageExpressionEvaluator
All Implemented Interfaces:
ExpressionEvaluator, NamedObject

public class MessageExpressionEvaluator
extends Object
implements ExpressionEvaluator

Returns properties on the MuleMessage itself. The supported expressions map directly to methods on the message. For example:

If no expression is set the MuleMessage itself will be returned.

If the object passed in is not a MuleMessage, the same object will be returned.

See Also:
ExpressionEvaluator, DefaultExpressionManager

Field Summary
protected  Log logger
          logger used by this class
static String NAME
           
 
Constructor Summary
MessageExpressionEvaluator()
           
 
Method Summary
 Object evaluate(String expression, MuleMessage message)
          Extracts a single property from the message
 String getName()
          Gets the name of the object
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

NAME

public static final String NAME
See Also:
Constant Field Values

logger

protected final transient Log logger
logger used by this class

Constructor Detail

MessageExpressionEvaluator

public MessageExpressionEvaluator()
Method Detail

evaluate

public Object evaluate(String expression,
                       MuleMessage message)
Description copied from interface: ExpressionEvaluator
Extracts a single property from the message

Specified by:
evaluate in interface ExpressionEvaluator
Parameters:
expression - the property expression or expression
message - the message to extract from
Returns:
the result of the extraction or null if the property was not found

getName

public String getName()
Gets the name of the object

Specified by:
getName in interface NamedObject
Returns:
the name of the object


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