Package org.springframework.batch.infrastructure.item.adapter

Class ItemReaderAdapter<T>

java.lang.Object

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

org.springframework.batch.infrastructure.item.adapter.ItemReaderAdapter<T>

All Implemented Interfaces:

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

public class ItemReaderAdapter<T>
extends AbstractMethodInvokingDelegator<T>
implements ItemReader<T>

Invokes a custom method on a delegate plain old Java object which itself provides an item.

This adapter is thread-safe as long as the delegate ItemReader is thread-safe.

Author:

Robert Kasanicky

Nested Class Summary

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

AbstractMethodInvokingDelegator.InvocationTargetThrowableWrapper

Constructor Summary

Constructors

Constructor	Description
ItemReaderAdapter()

Method Summary

Modifier and Type	Method	Description
@Nullable T	read()	Reads a piece of input data and advance to the next one.

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

afterPropertiesSet, 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

ItemReaderAdapter

public ItemReaderAdapter()

Method Details

read

public @Nullable T read()
                 throws Exception

Description copied from interface: ItemReader

Reads a piece of input data and advance to the next one. Implementations must return null at the end of the input data set. In a transactional setting, caller might get the same item twice from successive calls (or otherwise), if the first call was in a transaction that rolled back.

Specified by:

read in interface ItemReader<T>

Returns:

return value of the target method.

Throws:

Exception - if an error occurs.