Package org.springframework.integration.transformer

Class StreamTransformer

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.transformer.AbstractTransformer

org.springframework.integration.transformer.StreamTransformer

All Implemented Interfaces:

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

public class StreamTransformer
extends AbstractTransformer

Transforms an InputStream payload to a byte[] or String (if a charset is provided).

Since:

4.3

Author:

Gary Russell

Field Summary

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

EXPRESSION_PARSER, logger

Constructor Summary

Constructors

Constructor	Description
StreamTransformer()	Construct an instance to transform an InputStream to a byte[].
StreamTransformer(String charset)	Construct an instance with the charset to convert the stream to a String; if null a byte[] will be produced instead.

Method Summary

Modifier and Type	Method	Description
protected Object	doTransform(Message<?> message)	Subclasses must implement this method to provide the transformation logic.

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, onInit, 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

StreamTransformer

public StreamTransformer()

Construct an instance to transform an InputStream to a byte[].

StreamTransformer

public StreamTransformer(String charset)

Construct an instance with the charset to convert the stream to a String; if null a byte[] will be produced instead.

Parameters:

charset - the charset.

Method Details

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.