Class StepIterator

  • All Implemented Interfaces:
    java.lang.Cloneable, DTMAxisIterator
    Direct Known Subclasses:
    FilteredStepIterator

    public class StepIterator
    extends DTMAxisIteratorBase
    A step iterator is used to evaluate expressions like "BOOK/TITLE". A better name for this iterator would have been ParentIterator since both "BOOK" and "TITLE" are steps in XPath lingo. Step iterators are constructed from two other iterators which we are going to refer to as "outer" and "inner". Every node from the outer iterator (the one for BOOK in our example) is used to initialize the inner iterator. After this initialization, every node from the inner iterator is returned (in essence, implementing a "nested loop").
    Author:
    Jacek Ambroziak, Santiago Pericas-Geertsen, Erwin Bolwidt , Morten Jorgensen
    • Method Detail

      • setStartNode

        public DTMAxisIterator setStartNode​(int node)
        Description copied from interface: DTMAxisIterator
        Set start to END should 'close' the iterator, i.e. subsequent call to next() should return END.
        Parameters:
        node - Sets the root of the iteration.
        Returns:
        A DTMAxisIterator set to the start of the iteration.
      • next

        public int next()
        Description copied from interface: DTMAxisIterator
        Get the next node in the iteration.
        Returns:
        The next node handle in the iteration, or END.
      • setMark

        public void setMark()
        Description copied from interface: DTMAxisIterator
        Remembers the current node for the next call to gotoMark().
      • gotoMark

        public void gotoMark()
        Description copied from interface: DTMAxisIterator
        Restores the current node remembered by setMark().