net.sf.saxon.expr
Interface LastPositionFinder

All Superinterfaces:

SequenceIterator

All Known Implementing Classes:

ArrayIterator, EmptyIterator, GroupByIterator, ListIterator, MemoClosure.ProgressiveIterator, RangeIterator, ReverseArrayIterator, SingletonIterator, SortedIterator, TailExpression.TailIterator

public interface LastPositionFinder

extends SequenceIterator

A LastPositionFinder is an interface implemented by any SequenceIterator that is able to return the position of the last item in the sequence.

Field Summary

Fields inherited from interface net.sf.saxon.om.SequenceIterator

ATOMIZABLE, GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD

Method Summary

int	getLastPosition() Get the last position (that is, the number of items in the sequence).

Methods inherited from interface net.sf.saxon.om.SequenceIterator

current, getAnother, getProperties, next, position

Method Detail

getLastPosition

public int getLastPosition()
                    throws XPathException

Get the last position (that is, the number of items in the sequence). This method is non-destructive: it does not change the state of the iterator. The result is undefined if the next() method of the iterator has already returned null. This method must not be called unless the result of getProperties() on the iterator includes the bit setting SequenceIterator.LAST_POSITION_FINDER

Throws:

XPathException