Interface LastPositionFinder<T extends Item>

All Known Implementing Classes:
ArrayIterator, EmptyAxisIterator, EmptyIterator, GroupByIterator, ItemMappingIterator, ListIterator, MemoClosure.ProgressiveIterator, RangeIterator, Remove.RemoveIterator, ReverseArrayIterator, ReverseRangeIterator, SingleNodeIterator, SingletonIterator, SortedGroupIterator, SortedIterator, SubsequenceIterator, TailIterator, UntypedAtomizingIterator

public interface LastPositionFinder<T extends Item>
A LastPositionFinder is an interface implemented by any SequenceIterator that is able to return the position of the last item in the sequence.
  • Method Summary

    Modifier and Type
    Method
    Description
    int
    Get the last position (that is, the number of items in the sequence).
  • Method Details

    • getLength

      int getLength() 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
      Returns:
      the number of items in the sequence
      Throws:
      XPathException - if an error occurs evaluating the sequence in order to determine the number of items