CorrelationPropertiesExpressionEvaluator (Mule ESB 2.2.1 API)
Keywords: org.mule.routing.CorrelationPropertiesExpressionEvaluator class

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## org.mule.routing
Class CorrelationPropertiesExpressionEvaluator

    java.lang.Object
      org.mule.expression.MessageHeaderExpressionEvaluator
          org.mule.routing.CorrelationPropertiesExpressionEvaluator

All Implemented Interfaces:
  ExpressionEvaluator, NamedObject

    public class CorrelationPropertiesExpressionEvaluator

extends MessageHeaderExpressionEvaluator

`CorrelationPropertiesExpressionEvaluator` is a default implementation used for getting the Correlation information from a message. This object is only used when getting a specific property to be set on the message. When reading the property the getProperty(...) or the direct property accessor will be used i.e. message.getCorrelationId() or message.getProperty(MuleProperties.MULE_CORRELATION_ID_PROPERTY)

Field Summary

Fields inherited from class org.mule.expression.MessageHeaderExpressionEvaluator
`NAME`

Constructor Summary
`CorrelationPropertiesExpressionEvaluator()`

Method Summary
`Object` | `evaluate(String name, MuleMessage message)` Extracts a single property from the message
`String` | `getCorrelationId(MessageAdapter message)`
`String` | `getMessageId(MessageAdapter message)`

Methods inherited from class org.mule.expression.MessageHeaderExpressionEvaluator
`getName, setName`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### CorrelationPropertiesExpressionEvaluator

    public CorrelationPropertiesExpressionEvaluator()

Method Detail

### evaluate

    public final Object evaluate(String name,
                                 MuleMessage message)

  Description copied from interface: `ExpressionEvaluator`
  Extracts a single property from the message

  Specified by:
    `evaluate` in interface `ExpressionEvaluator`
  Overrides:
    `evaluate` in class `MessageHeaderExpressionEvaluator`
  Parameters:
    `name` - 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

### getMessageId

    public String getMessageId(MessageAdapter message)

### getCorrelationId

    public String getCorrelationId(MessageAdapter message)

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