Class ReverseRangeIterator

    • Constructor Detail

      • ReverseRangeIterator

        public ReverseRangeIterator​(long start,
                                    long end)
                             throws XPathException
        Create an iterator over a range of integers in monotonic descending order
        Parameters:
        start - the first integer to be delivered (the highest in the range)
        end - the last integer to be delivered (the lowest in the range). Must be <= start
        Throws:
        XPathException - if the values are inconsistent or if the length is greater than 2^31
    • Method Detail

      • hasNext

        public boolean hasNext()
        Description copied from interface: LookaheadIterator
        Determine whether there are more items to come. Note that this operation is stateless and it is not necessary (or usual) to call it before calling next(). It is used only when there is an explicit need to tell if we are at the last element.

        This method must not be called unless the result of getProperties() on the iterator includes the property SequenceIterator.Property.LOOKAHEAD

        Specified by:
        hasNext in interface LookaheadIterator
        Returns:
        true if there are more items in the sequence
      • getLength

        public int getLength()
        Description copied from interface: LastPositionFinder
        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.Property.LAST_POSITION_FINDER
        Specified by:
        getLength in interface LastPositionFinder
        Returns:
        the number of items in the sequence
      • getReverseIterator

        public AtomicIterator getReverseIterator()
        Description copied from interface: ReversibleIterator
        Get a new SequenceIterator that returns the same items in reverse order. If this SequenceIterator is an AxisIterator, then the returned SequenceIterator must also be an AxisIterator.
        Specified by:
        getReverseIterator in interface ReversibleIterator
        Returns:
        an iterator over the items in reverse order