Navigator.DescendantEnumeration

java.lang.Object
- net.sf.saxon.tree.util.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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

void advance()

NodeInfo next()
Get the next item in the sequence.
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
- Methods inherited from interface net.sf.saxon.om.SequenceIterator
  close

- 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()
```