org.mule.expression.transformers
Class ExpressionTransformer

java.lang.Object
  org.mule.transformer.AbstractTransformer
      org.mule.transformer.AbstractMessageTransformer
          org.mule.expression.transformers.AbstractExpressionTransformer
              org.mule.expression.transformers.ExpressionTransformer

All Implemented Interfaces:

AnnotatedObject, MuleContextAware, Disposable, Initialisable, NameableObject, NamedObject, MessageProcessor, MessageTransformer, Transformer, EndpointAware

public class ExpressionTransformer
extends AbstractExpressionTransformer

This transformer will evaluate one or more expressions on the current message and return the results as an Array. If only one expression is defined it will return the object returned from the expression.

You can use expressions to extract

• headers (single, map or list)
• attachments (single, map or list)
• payload
• xpath
• groovy
• bean

and more.

This transformer provides a very powerful way to pull different bits of information from the message and pass them to the service.

Field Summary

Fields inherited from class org.mule.expression.transformers.AbstractExpressionTransformer

arguments

Fields inherited from class org.mule.transformer.AbstractTransformer

encoding, endpoint, logger, mimeType, MULE_MESSAGE_DATA_TYPE, muleContext, name, returnType, sourceTypes

Fields inherited from interface org.mule.api.lifecycle.Initialisable

PHASE_NAME

Fields inherited from interface org.mule.api.lifecycle.Disposable

PHASE_NAME

Fields inherited from interface org.mule.api.AnnotatedObject

PROPERTY_NAME

Constructor Summary

ExpressionTransformer()

Method Summary

boolean	isReturnSourceIfNull()
void	setReturnSourceIfNull(boolean returnSourceIfNull)
Object	transformMessage(MuleMessage message, String outputEncoding) Transform the message

Methods inherited from class org.mule.expression.transformers.AbstractExpressionTransformer

addArgument, getArguments, initialise, removeArgument, setArguments

Methods inherited from class org.mule.transformer.AbstractMessageTransformer

checkReturnClass, doTransform, isSourceDataTypeSupported, transform, transform, transform

Methods inherited from class org.mule.transformer.AbstractTransformer

dispose, generateTransformerName, getAnnotation, getAnnotations, getEncoding, getEncoding, getEndpoint, getMimeType, getName, getReturnClass, getReturnDataType, getSourceDataTypes, getSourceTypes, isAcceptNull, isAllowNullReturn, isConsumed, isIgnoreBadInput, isSourceDataTypeSupported, isSourceTypeSupported, isSourceTypeSupported, process, registerSourceType, registerSourceType, setAllowNullReturn, setAnnotations, setEncoding, setEndpoint, setIgnoreBadInput, setMimeType, setMuleContext, setName, setReturnClass, setReturnDataType, toString, transform, unregisterSourceType, unregisterSourceType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.mule.api.transformer.Transformer

getEncoding, getEndpoint, getMimeType, getReturnClass, getReturnDataType, getSourceDataTypes, getSourceTypes, isAcceptNull, isIgnoreBadInput, isSourceDataTypeSupported, isSourceTypeSupported, setReturnClass, setReturnDataType, transform

Methods inherited from interface org.mule.api.processor.MessageProcessor

process

Methods inherited from interface org.mule.api.lifecycle.Disposable

dispose

Methods inherited from interface org.mule.api.NameableObject

setName

Methods inherited from interface org.mule.api.NamedObject

getName

Methods inherited from interface org.mule.api.context.MuleContextAware

setMuleContext

Methods inherited from interface org.mule.endpoint.EndpointAware

setEndpoint

Constructor Detail

ExpressionTransformer

public ExpressionTransformer()

Method Detail

transformMessage

public Object transformMessage(MuleMessage message,
                               String outputEncoding)
                        throws TransformerException

Description copied from class: AbstractMessageTransformer

Transform the message

Specified by:

transformMessage in class AbstractMessageTransformer

Throws:

TransformerException

isReturnSourceIfNull

public boolean isReturnSourceIfNull()

setReturnSourceIfNull

public void setReturnSourceIfNull(boolean returnSourceIfNull)