org.mule.expression
Class MessageHeadersExpressionEvaluator

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

public class MessageHeadersExpressionEvaluator
extends Object
implements ExpressionEvaluator

Looks up the property on the message using the expression given. The expression can contain a comma-separated list of header names to lookup. A Map of key value pairs is returned.

See Also:
MessageHeadersListExpressionEvaluator, ExpressionEvaluator, DefaultExpressionManager

Field Summary
static String NAME
           
 
Constructor Summary
MessageHeadersExpressionEvaluator()
           
 
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
Constructor Detail

MessageHeadersExpressionEvaluator

public MessageHeadersExpressionEvaluator()
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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