org.mule.expression

Class MessageHeaderExpressionEvaluator

java.lang.Object

org.mule.expression.MessageHeaderExpressionEvaluator

All Implemented Interfaces:

ExpressionEvaluator, NamedObject

Direct Known Subclasses:

CorrelationPropertiesExpressionEvaluator

public class MessageHeaderExpressionEvaluator
extends Object
implements ExpressionEvaluator

Looks up the property on the message using the property name given. If the call on the messgae returns null, parameters on the inbound endpoint will also be checked.

See Also:

MessageHeadersListExpressionEvaluator, MessageHeadersExpressionEvaluator, ExpressionEvaluator, DefaultExpressionManager

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME

Constructor Summary

Constructors

Constructor and Description
MessageHeaderExpressionEvaluator()

Method Summary

Methods

Modifier and Type	Method and Description
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

MessageHeaderExpressionEvaluator

public MessageHeaderExpressionEvaluator()

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