net.sf.saxon.expr

Interface LastPositionFinder

All Superinterfaces:
SequenceIterator
Known Implementing Classes:
ArrayIterator, EmptyIterator, GroupByIterator, ListIterator, MemoClosure.ProgressiveIterator, NodeArrayIterator, NodeListIterator, RangeIterator, Remove.RemoveIterator, ReverseArrayIterator, ReverseNodeArrayIterator, ReverseRangeIterator, SingleNodeIterator, SingletonIterator, SortedGroupIterator, SortedIterator, SortedTupleIterator, SubsequenceIterator, 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.

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

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 Details

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