Class Navigator.DescendantEnumeration

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable, SequenceIterator, AxisIterator
    Enclosing class:
    Navigator

    public static final class Navigator.DescendantEnumeration
    extends java.lang.Object
    implements AxisIterator
    General-purpose implementation of the descendant and descendant-or-self axes, in terms of the child axis. But it also has the option to return the descendants in reverse document order; this is used when evaluating the preceding axis. Note that the includeSelf option should not be used when scanning in reverse order, as the self node will always be returned first.
    • Constructor Summary

      Constructors 
      Constructor Description
      DescendantEnumeration​(NodeInfo start, boolean includeSelf, boolean forwards)
      Create an iterator over the descendant or descendant-or-self axis
    • Constructor Detail

      • DescendantEnumeration

        public DescendantEnumeration​(NodeInfo start,
                                     boolean includeSelf,
                                     boolean forwards)
        Create an iterator over the descendant or descendant-or-self axis
        Parameters:
        start - the initial context node
        includeSelf - true if the "self" node is to be included
        forwards - true for a forwards iteration, false for reverse order
    • Method Detail

      • next

        public final NodeInfo next()
        Description copied from interface: SequenceIterator
        Get the next item in the sequence. This method changes the state of the iterator.
        Specified by:
        next in interface AxisIterator
        Specified by:
        next in interface SequenceIterator
        Returns:
        the next item, or null if there are no more items. Once a call on next() has returned null, no further calls should be made. The preferred action for an iterator if subsequent calls on next() are made is to return null again, and all implementations within Saxon follow this rule.
      • advance

        public void advance()