Class SimpleFromAvroTransformer

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.transformer.AbstractTransformer

org.springframework.integration.transformer.SimpleFromAvroTransformer

All Implemented Interfaces:

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

public class SimpleFromAvroTransformer
extends AbstractTransformer
implements BeanClassLoaderAware

An Apache Avro transformer to create generated SpecificRecord objects from byte[].

Since:

5.2

Author:

Gary Russell, Artem Bilan

Field Summary

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

EXPRESSION_PARSER, logger

Constructor Summary

Constructors

Constructor	Description
SimpleFromAvroTransformer(Class<? extends org.apache.avro.specific.SpecificRecord> defaultType)	Construct an instance with the supplied default type to create.

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	setBeanClassLoader(ClassLoader classLoader)
void	setTypeExpression(Expression expression)	Set the expression to evaluate against the message to determine the type.
void	setTypeExpressionString(String expression)	Set the expression to evaluate against the message to determine the type id.
SimpleFromAvroTransformer	typeExpression(String expression)	Set the expression to evaluate against the message to determine the type id.
SimpleFromAvroTransformer	typeExpression(Expression expression)	Set the expression to evaluate against the message to determine the type.

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

SimpleFromAvroTransformer

public SimpleFromAvroTransformer(Class<? extends org.apache.avro.specific.SpecificRecord> defaultType)

Construct an instance with the supplied default type to create.

Parameters:

defaultType - the type.

Method Details

setBeanClassLoader

public void setBeanClassLoader(ClassLoader classLoader)

Specified by:

setBeanClassLoader in interface BeanClassLoaderAware

typeExpression

public SimpleFromAvroTransformer typeExpression(Expression expression)

Set the expression to evaluate against the message to determine the type. Default headers['avro_type'].

Parameters:

expression - the expression.

Returns:

the transformer

typeExpression

public SimpleFromAvroTransformer typeExpression(String expression)

Set the expression to evaluate against the message to determine the type id. Default headers['avro_type'].

Parameters:

expression - the expression.

Returns:

the transformer

setTypeExpression

public void setTypeExpression(Expression expression)

Set the expression to evaluate against the message to determine the type. Default headers['avro_type'].

Parameters:

expression - the expression.

setTypeExpressionString

public void setTypeExpressionString(String expression)

Set the expression to evaluate against the message to determine the type id. Default headers['avro_type'].

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.