Package org.springframework.batch.infrastructure.item.function

Class SupplierItemReader<T>

java.lang.Object

org.springframework.batch.infrastructure.item.function.SupplierItemReader<T>

Type Parameters:

T - type of items to read

All Implemented Interfaces:

ItemReader<T>

public class SupplierItemReader<T>
extends Object
implements ItemReader<T>

Adapter for a Supplier to an ItemReader.

Since:

5.2

Author:

Mahmoud Ben Hassine

Constructor Summary

Constructors

Constructor	Description
SupplierItemReader(Supplier<T> supplier)	Create a new SupplierItemReader.

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Details

SupplierItemReader

public SupplierItemReader(Supplier<T> supplier)

Create a new SupplierItemReader.

Parameters:

supplier - the supplier to use to read items. Must not be null.

Method Details

read

public 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:

T the item to be processed or null if the data source is exhausted

Throws:

Exception - if an error occurs.