org.springframework.batch.item.support
Class DelegatingItemWriter

java.lang.Object
  org.springframework.batch.item.support.DelegatingItemWriter

All Implemented Interfaces:

ItemWriter, InitializingBean

Direct Known Subclasses:

ItemTransformerItemWriter

public class DelegatingItemWriter
extends Object
implements ItemWriter, InitializingBean

Simple wrapper around ItemWriter. The implementation is thread-safe if the delegate is thread-safe.

Author:

Dave Syer, Robert Kasanicky

Constructor Summary

DelegatingItemWriter()
Default constructor.

DelegatingItemWriter(ItemWriter itemWriter)

Method Summary

void	afterPropertiesSet()
void	clear() Delegates to ItemWriter.clear()
protected Object	doProcess(Object item) By default returns the argument.
void	flush() Delegates to ItemWriter.flush()
void	setDelegate(ItemWriter writer) Setter for ItemWriter.
void	write(Object item) Calls doProcess(Object) and then writes the result to the delegate ItemWriter.

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegatingItemWriter

public DelegatingItemWriter()

Default constructor.

DelegatingItemWriter

public DelegatingItemWriter(ItemWriter itemWriter)

Parameters:

itemWriter -

Method Detail

write

public void write(Object item)
           throws Exception

Calls doProcess(Object) and then writes the result to the delegate ItemWriter.

Specified by:

write in interface ItemWriter

Throws:

Exception

See Also:

ItemWriter.write(Object)

doProcess

protected Object doProcess(Object item)
                    throws Exception

By default returns the argument. This method is an extension point meant to be overridden by subclasses that implement processing logic.

Throws:

Exception

setDelegate

public void setDelegate(ItemWriter writer)

Setter for ItemWriter.

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

Exception

clear

public void clear()
           throws ClearFailedException

Delegates to ItemWriter.clear()

Specified by:

clear in interface ItemWriter

Throws:

ClearFailedException - in case of an error. If this exception is thrown the writer may be in an inconsistent state and manual intervention might be required to reconcile the data with persistent output.

flush

public void flush()
           throws FlushFailedException

Delegates to ItemWriter.flush()

Specified by:

flush in interface ItemWriter

Throws:

FlushFailedException - in case of an error. If this exception is thrown the writer may be in an inconsistent state and manual intervention might be required to reconcile the data with persistent output.