|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
public interface PeekableItemReader<T>
A specialisation of ItemReader
that allows the user to look ahead
into the stream of items. This is useful, for instance, when reading flat
file data that contains record separator lines which are actually part of the
next record.
The detailed contract for peek()
has to be defined by the
implementation because there is no general way to define it in a concurrent
environment. The definition of "the next read()" operation is tenuous if
multiple clients are reading concurrently, and the ability to peek implies
that some state is likely to be stored, so implementations of
PeekableItemReader
may well be restricted to single threaded use.
Method Summary | |
---|---|
T |
peek()
Get the next item that would be returned by ItemReader.read() , without
affecting the result of ItemReader.read() . |
Methods inherited from interface org.springframework.batch.item.ItemReader |
---|
read |
Method Detail |
---|
T peek() throws Exception, UnexpectedInputException, ParseException
ItemReader.read()
, without
affecting the result of ItemReader.read()
.
Exception
- if there is a problem
UnexpectedInputException
ParseException
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |