org.springframework.batch.item.adapter
Class PropertyExtractingDelegatingItemWriter

java.lang.Object
  org.springframework.batch.item.adapter.AbstractMethodInvokingDelegator
      org.springframework.batch.item.adapter.PropertyExtractingDelegatingItemWriter

All Implemented Interfaces:

ItemWriter, InitializingBean

public class PropertyExtractingDelegatingItemWriter
extends AbstractMethodInvokingDelegator
implements ItemWriter

Delegates processing to a custom method - extracts property values from item object and uses them as arguments for the delegate method.

Author:

Robert Kasanicky

See Also:

ItemWriterAdapter

Constructor Summary

PropertyExtractingDelegatingItemWriter()

Method Summary

void	afterPropertiesSet()
void	clear() Clear any buffers that are being held.
void	flush() Flush any buffers that are being held.
void	setFieldsUsedAsTargetMethodArguments(String[] fieldsUsedAsMethodArguments)
void	write(Object item) Extracts values from item's fields named in fieldsUsedAsTargetMethodArguments and passes them as arguments to the delegate method.

Methods inherited from class org.springframework.batch.item.adapter.AbstractMethodInvokingDelegator

invokeDelegateMethod, invokeDelegateMethodWithArgument, invokeDelegateMethodWithArguments, setArguments, setTargetMethod, setTargetObject

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyExtractingDelegatingItemWriter

public PropertyExtractingDelegatingItemWriter()

Method Detail

write

public void write(Object item)
           throws Exception

Extracts values from item's fields named in fieldsUsedAsTargetMethodArguments and passes them as arguments to the delegate method.

Specified by:

write in interface ItemWriter

Throws:

Exception - if there are errors. If the writer is used inside a retry or a batch the framework will catch the exception and convert or rethrow it as appropriate.

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface InitializingBean

Overrides:

afterPropertiesSet in class AbstractMethodInvokingDelegator

Throws:

Exception

setFieldsUsedAsTargetMethodArguments

public void setFieldsUsedAsTargetMethodArguments(String[] fieldsUsedAsMethodArguments)

Parameters:

fieldsUsedAsMethodArguments - the values of the these item's fields will be used as arguments for the delegate method. Nested property values are supported, e.g. address.city

clear

public void clear()
           throws ClearFailedException

Description copied from interface: ItemWriter

Clear any buffers that are being held. This will usually be performed prior to rolling back any transactions.

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

Description copied from interface: ItemWriter

Flush any buffers that are being held. This will usually be performed prior to committing any transactions.

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.