org.mule.runtime.core.expression.transformers

Class ExpressionTransformer

java.lang.Object

org.mule.runtime.api.meta.AbstractAnnotatedObject

org.mule.runtime.core.transformer.AbstractTransformer

org.mule.runtime.core.transformer.AbstractMessageTransformer

org.mule.runtime.core.expression.transformers.AbstractExpressionTransformer

org.mule.runtime.core.expression.transformers.ExpressionTransformer

All Implemented Interfaces:

Function<org.reactivestreams.Publisher<Event>,org.reactivestreams.Publisher<Event>>, org.mule.runtime.api.lifecycle.Disposable, org.mule.runtime.api.lifecycle.Initialisable, org.mule.runtime.api.meta.AnnotatedObject, org.mule.runtime.api.meta.NameableObject, org.mule.runtime.api.meta.NamedObject, MuleContextAware, Processor, ReactiveProcessor, MessageTransformer, Transformer

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.

Nested Class Summary

Nested classes/interfaces inherited from interface org.mule.runtime.core.api.processor.ReactiveProcessor

ReactiveProcessor.ProcessingType

Field Summary

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

arguments

Fields inherited from class org.mule.runtime.core.transformer.AbstractTransformer

logger, muleContext, name, sourceTypes

Fields inherited from class org.mule.runtime.api.meta.AbstractAnnotatedObject

LOCATION_KEY

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

PHASE_NAME

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

PHASE_NAME

Fields inherited from interface org.mule.runtime.api.meta.AnnotatedObject

PROPERTY_NAME

Constructor Summary

Constructors

Constructor and Description
ExpressionTransformer()

Method Summary

Modifier and Type	Method and Description
boolean	isReturnSourceIfNull()
void	setReturnSourceIfNull(boolean returnSourceIfNull)
Object	transformMessage(Event event, Charset outputEncoding) Transform the message

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

addArgument, getArguments, initialise, removeArgument, setArguments

Methods inherited from class org.mule.runtime.core.transformer.AbstractMessageTransformer

checkReturnClass, doTransform, isSourceDataTypeSupported, transform, transform, transform

Methods inherited from class org.mule.runtime.core.transformer.AbstractTransformer

dispose, generateTransformerName, getName, getReturnDataType, getSourceDataTypes, isAcceptNull, isAllowNullReturn, isConsumed, isIgnoreBadInput, isSourceDataTypeSupported, process, registerSourceType, resolveEncoding, setAllowNullReturn, setIgnoreBadInput, setMuleContext, setName, setReturnDataType, toString, transform, unregisterSourceType

Methods inherited from class org.mule.runtime.api.meta.AbstractAnnotatedObject

getAnnotation, getAnnotations, getLocation, setAnnotations

Methods inherited from class java.lang.Object

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

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

getProcessingType, getReturnDataType, getSourceDataTypes, isAcceptNull, isIgnoreBadInput, isSourceDataTypeSupported, setReturnDataType, transform

Methods inherited from interface org.mule.runtime.core.api.processor.Processor

apply, process

Methods inherited from interface java.util.function.Function

andThen, compose, identity

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

dispose

Methods inherited from interface org.mule.runtime.api.meta.NameableObject

setName

Methods inherited from interface org.mule.runtime.api.meta.NamedObject

getName

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

setMuleContext

Constructor Detail

ExpressionTransformer

public ExpressionTransformer()

Method Detail

transformMessage

public Object transformMessage(Event event,
                               Charset 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)