org.springframework.batch.item.support

Class IteratorItemReader<T>

java.lang.Object

org.springframework.batch.item.support.IteratorItemReader<T>

All Implemented Interfaces:

ItemReader<T>

public class IteratorItemReader<T>
extends java.lang.Object
implements ItemReader<T>

An ItemReader that pulls data from a Iterator or Iterable using the constructors.

Author:

Juliusz Brzostek, Dave Syer

Constructor Summary

Constructors

Constructor and Description
IteratorItemReader(java.lang.Iterable<T> iterable) Construct a new reader from this iterable (could be a collection), by extracting an instance of Iterator from it.
IteratorItemReader(java.util.Iterator<T> iterator) Construct a new reader from this iterator directly.

Method Summary

Modifier and Type	Method and Description
T	read() Implementation of ItemReader.read() that just iterates over the iterator provided.

Methods inherited from class java.lang.Object

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

Constructor Detail

IteratorItemReader

public IteratorItemReader(java.lang.Iterable<T> iterable)

Construct a new reader from this iterable (could be a collection), by extracting an instance of Iterator from it.

Parameters:

iterable - in instance of Iterable

See Also:

Iterable.iterator()

IteratorItemReader

public IteratorItemReader(java.util.Iterator<T> iterator)

Construct a new reader from this iterator directly.

Parameters:

iterator - an instance of Iterator

Method Detail

read

public T read()
       throws java.lang.Exception,
              UnexpectedInputException,
              ParseException

Implementation of ItemReader.read() that just iterates over the iterator provided.

Specified by:

read in interface ItemReader<T>

Returns:

T the item to be processed

Throws:

ParseException - if there is a problem parsing the current record (but the next one may still be valid)

NonTransientResourceException - if there is a fatal exception in the underlying resource. After throwing this exception implementations should endeavour to return null from subsequent calls to read.

UnexpectedInputException - if there is an uncategorised problem with the input data. Assume potentially transient, so subsequent calls to read might succeed.

java.lang.Exception - if an there is a non-specific error.