Package org.springframework.batch.item.adapter

Class PropertyExtractingDelegatingItemWriter<T>

java.lang.Object

org.springframework.batch.item.adapter.AbstractMethodInvokingDelegator<T>

org.springframework.batch.item.adapter.PropertyExtractingDelegatingItemWriter<T>

All Implemented Interfaces:

ItemWriter<T>, org.springframework.beans.factory.InitializingBean

public class PropertyExtractingDelegatingItemWriter<T>
extends AbstractMethodInvokingDelegator<T>
implements ItemWriter<T>

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

This writer is thread-safe as long as the delegate ItemWriter is thread-safe.

Author:

Robert Kasanicky, Mahmoud Ben Hassine

See Also:

• ItemWriterAdapter

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.batch.item.adapter.AbstractMethodInvokingDelegator

AbstractMethodInvokingDelegator.InvocationTargetThrowableWrapper

Constructor Summary

Constructors

Constructor	Description
PropertyExtractingDelegatingItemWriter()

Method Summary

Modifier and Type	Method	Description
void	afterPropertiesSet()
void	setFieldsUsedAsTargetMethodArguments(String[] fieldsUsedAsMethodArguments)
void	write(Chunk<? extends T> items)	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

getArguments, getTargetMethod, getTargetObject, 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 Details

PropertyExtractingDelegatingItemWriter

public PropertyExtractingDelegatingItemWriter()

Method Details

write

public void write(Chunk<? extends T> items)
           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<T>

Parameters:

items - of items to be written. Must not be null.

Throws:

Exception - if there are errors. The framework will catch the exception and convert or rethrow it as appropriate.

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Overrides:

afterPropertiesSet in class AbstractMethodInvokingDelegator<T>

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