Package org.springframework.integration.transformer

Class SimpleToAvroTransformer

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.transformer.AbstractTransformer

org.springframework.integration.transformer.SimpleToAvroTransformer

All Implemented Interfaces:

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

public class SimpleToAvroTransformer
extends AbstractTransformer

An Apache Avro transformer for generated SpecificRecord objects.

Since:

5.2

Author:

Gary Russell

Field Summary

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

EXPRESSION_PARSER, logger

Constructor Summary

Constructors

Constructor	Description
SimpleToAvroTransformer()

Method Summary

Modifier and Type	Method	Description
protected Object	doTransform(Message<?> message)	Subclasses must implement this method to provide the transformation logic.
protected void	onInit()	Subclasses may implement this for initialization logic.
void	setTypeExpression(Expression expression)	Set the expression to evaluate against the message to determine the value for the AvroHeaders.TYPE header.
void	setTypeExpressionString(String expression)	Set the expression to evaluate against the message to determine the value for the AvroHeaders.TYPE header.
SimpleToAvroTransformer	typeExpression(String expression)	Set the expression to evaluate against the message to determine the value for the AvroHeaders.TYPE header.
SimpleToAvroTransformer	typeExpression(Expression expression)	Set the expression to evaluate against the message to determine the value for the AvroHeaders.TYPE header.

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

SimpleToAvroTransformer

public SimpleToAvroTransformer()

Method Details

typeExpression

public SimpleToAvroTransformer typeExpression(Expression expression)

Set the expression to evaluate against the message to determine the value for the AvroHeaders.TYPE header.

Parameters:

expression - the expression.

Returns:

the transformer

typeExpression

public SimpleToAvroTransformer typeExpression(String expression)

Set the expression to evaluate against the message to determine the value for the AvroHeaders.TYPE header.

Parameters:

expression - the expression.

Returns:

the transformer

setTypeExpression

public void setTypeExpression(Expression expression)

Set the expression to evaluate against the message to determine the value for the AvroHeaders.TYPE header.

Parameters:

expression - the expression.

setTypeExpressionString

public void setTypeExpressionString(String expression)

Set the expression to evaluate against the message to determine the value for the AvroHeaders.TYPE header.

Parameters:

expression - the expression.

onInit

protected void onInit()

Description copied from class: IntegrationObjectSupport

Subclasses may implement this for initialization logic.

Overrides:

onInit in class IntegrationObjectSupport

doTransform

protected Object 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.