org.mule.api.expression

Interface ExpressionEvaluator

All Superinterfaces:

NamedObject

All Known Implementing Classes:

AbstractScriptExpressionEvaluator, AbstractXPathExpressionEvaluator, BaseAttachmentExpressionEvaluator, BeanPayloadExpressionEvaluator, CorrelationPropertiesExpressionEvaluator, EndpointInfoExpressionEvaluator, ExceptionTypeExpressionEvaluator, FunctionExpressionEvaluator, GroovyExpressionEvaluator, IllegalExpressionEvaluator, JaxpXPathExpressionEvaluator, JsonExpressionEvaluator, JsonNodeExpressionEvaluator, JXPathExpressionEvaluator, MapPayloadExpressionEvaluator, MessageAttachmentExpressionEvaluator, MessageAttachmentsExpressionEvaluator, MessageAttachmentsListExpressionEvaluator, MessageExpressionEvaluator, MessageHeaderExpressionEvaluator, MessageHeadersExpressionEvaluator, MessageHeadersListExpressionEvaluator, MessagePayloadExpressionEvaluator, MessageProcessorExpressionEvaluator, MuleContextExpressionEvaluator, MuleExpressionEvaluator, OgnlExpressionEvaluator, OutboundAttachmentsExpressionEvaluator, OutboundHeadersExpressionEvaluator, PayloadTypeExpressionEvaluator, RegexExpressionEvaluator, RegistryExpressionEvaluator, StringExpressionEvaluator, VariableExpressionEvaluator, WilcardExpressionEvaluator, XPathBranchExpressionEvaluator, XPathExpressionEvaluator, XPathNodeExpressionEvaluator

public interface ExpressionEvaluator
extends NamedObject

ExpressionEvaluator extracts a property from the message in a generic way. i.e. composite properties can be pulled and aggregated depending on this strategy. This can be used to extract Correlation Ids, Message Ids etc. These objects are used to execute property expressions (usually on the current message) at runtime to extracta dynamic value. ExpressionEvaluator names most contain only letters, dashes or underscores.

Method Summary

Methods

Modifier and Type	Method and Description
Object	evaluate(String expression, MuleMessage message) Extracts a single property from the message

Methods inherited from interface org.mule.api.NamedObject

getName

Method Detail

evaluate

Object evaluate(String expression,
              MuleMessage message)

Extracts a single property from the message

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