org.mule.expression.transformers

Class AbstractExpressionTransformer

java.lang.Object

org.mule.transformer.AbstractTransformer

org.mule.transformer.AbstractMessageTransformer

org.mule.expression.transformers.AbstractExpressionTransformer

All Implemented Interfaces:

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

Direct Known Subclasses:

AtomEntryBuilderTransformer, BeanBuilderTransformer, ExpressionTransformer

public abstract class AbstractExpressionTransformer
extends AbstractMessageTransformer

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

Modifier and Type	Field and Description
protected List<ExpressionArgument>	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

Constructors

Constructor and Description
AbstractExpressionTransformer()

Method Summary

Methods

Modifier and Type	Method and Description
void	addArgument(ExpressionArgument argument)
List<ExpressionArgument>	getArguments()
void	initialise() Template method were deriving classes can do any initialisation after the properties have been set on this transformer
boolean	removeArgument(ExpressionArgument argument)
void	setArguments(List<ExpressionArgument> arguments)

Methods inherited from class org.mule.transformer.AbstractMessageTransformer

checkReturnClass, doTransform, isSourceDataTypeSupported, transform, transform, transform, transformMessage

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

Field Detail

arguments

protected List<ExpressionArgument> arguments

Constructor Detail

AbstractExpressionTransformer

public AbstractExpressionTransformer()

Method Detail

addArgument

public void addArgument(ExpressionArgument argument)

removeArgument

public boolean removeArgument(ExpressionArgument argument)

initialise

public void initialise()
                throws InitialisationException

Template method were deriving classes can do any initialisation after the properties have been set on this transformer

Specified by:

initialise in interface Initialisable

Overrides:

initialise in class AbstractTransformer

Throws:

InitialisationException

RecoverableException - if an error occurs that can be recovered from

getArguments

public List<ExpressionArgument> getArguments()

setArguments

public void setArguments(List<ExpressionArgument> arguments)