Package org.springframework.integration.transformer

Class DecodingTransformer<T>

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.transformer.AbstractTransformer

org.springframework.integration.transformer.DecodingTransformer<T>

Type Parameters:

T - the payload type.

All Implemented Interfaces:

Aware, BeanFactoryAware, BeanNameAware, InitializingBean, ApplicationContextAware, ExpressionCapable, GenericTransformer<Message<?>,Message<?>>, NamedComponent, Transformer

public class DecodingTransformer<T>
extends AbstractTransformer

AbstractPayloadTransformer that delegates to a codec to decode the payload from a byte[].

Since:

4.2

Author:

Gary Russell

Field Summary

Fields inherited from class org.springframework.integration.context.IntegrationObjectSupport

EXPRESSION_PARSER, logger

Constructor Summary

Constructors

Constructor	Description
DecodingTransformer(Codec codec, Class<T> type)	Construct an instance to use the supplied codec to decode to the supplied type.
DecodingTransformer(Codec codec, Expression typeExpression)	Construct an instance to use the supplied codec to decode to the supplied type.

Method Summary

Modifier and Type	Method	Description
protected T	doTransform(Message<?> message)	Subclasses must implement this method to provide the transformation logic.
protected void	onInit()	Subclasses may implement this for initialization logic.
void	setEvaluationContext(StandardEvaluationContext evaluationContext)

Methods inherited from class org.springframework.integration.transformer.AbstractTransformer

transform

Methods inherited from class org.springframework.integration.context.IntegrationObjectSupport

afterPropertiesSet, extractTypeIfPossible, generateId, getApplicationContext, getApplicationContextId, getBeanDescription, getBeanFactory, getBeanName, getChannelResolver, getComponentName, getComponentType, getConversionService, getExpression, getIntegrationProperties, getMessageBuilderFactory, getTaskScheduler, isInitialized, setApplicationContext, setBeanFactory, setBeanName, setChannelResolver, setComponentName, setConversionService, setMessageBuilderFactory, setPrimaryExpression, setTaskScheduler, toString

Methods inherited from class java.lang.Object

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

Constructor Details

DecodingTransformer

public DecodingTransformer(Codec codec,
 Class<T> type)

Construct an instance to use the supplied codec to decode to the supplied type.

Parameters:

codec - the codec.

type - the type.

DecodingTransformer

public DecodingTransformer(Codec codec,
 Expression typeExpression)

Construct an instance to use the supplied codec to decode to the supplied type.

Parameters:

codec - the codec.

typeExpression - an expression that evaluates to a Class.

Method Details

setEvaluationContext

public void setEvaluationContext(StandardEvaluationContext evaluationContext)

onInit

protected void onInit()

Description copied from class: IntegrationObjectSupport

Subclasses may implement this for initialization logic.

Overrides:

onInit in class IntegrationObjectSupport

doTransform

protected T doTransform(Message<?> message)

Description copied from class: AbstractTransformer

Subclasses must implement this method to provide the transformation logic. If the return value is itself a Message, it will be used as the result. Otherwise, any non-null return value will be used as the payload of the result Message.

Specified by:

doTransform in class AbstractTransformer

Parameters:

message - The message.

Returns:

The result of the transformation.