com.metamatrix.common.buffer
Interface IndexedTupleSource

All Superinterfaces:

TupleSource

public interface IndexedTupleSource
extends TupleSource

Method Summary

TupleBatch	getBatch()
int	getCurrentIndex() Get the current position.
boolean	hasNext()
void	mark() Save the current position that can be restored with a call to reset()
void	reset() Restore the previous mark and set the mark back to the first position.
void	setPosition(int position) Set the tuple source position

Methods inherited from interface com.metamatrix.common.buffer.TupleSource

closeSource, getSchema, nextTuple

Method Detail

hasNext

boolean hasNext()
                throws MetaMatrixComponentException,
                       MetaMatrixProcessingException

Returns:

true if there are more tuples

Throws:

MetaMatrixComponentException

MetaMatrixProcessingException

mark

void mark()

Save the current position that can be restored with a call to reset()

reset

void reset()

Restore the previous mark and set the mark back to the first position.

setPosition

void setPosition(int position)

Set the tuple source position

Parameters:

position -

getCurrentIndex

int getCurrentIndex()

Get the current position. The position is 1 based and reports the position of the tuple that will be retrieved with a call to TupleSource.nextTuple()

Returns:

getBatch

TupleBatch getBatch()
                    throws MetaMatrixComponentException

Throws:

MetaMatrixComponentException