## net.sf.saxon.tree.iter
Interface AxisIterator

All Superinterfaces:
  SequenceIterator, UnfailingIterator

All Known Implementing Classes:
  AxisIteratorImpl, EmptyIterator, NamespaceIterator, Navigator.AncestorEnumeration, Navigator.AxisFilter, Navigator.BaseEnumeration, Navigator.DescendantEnumeration, Navigator.EmptyTextFilter, Navigator.FollowingEnumeration, Navigator.PrecedingEnumeration, NodeArrayIterator, NodeListIterator, PrependIterator, ReverseNodeArrayIterator, SingleNodeIterator, VirtualCopy.VirtualCopier, VirtualUntypedCopy.VirtualUntypedCopier

    public interface AxisIterator

extends UnfailingIterator

A SequenceIterator is used to iterate over a sequence. An AxisIterator is a SequenceIterator that throws no exceptions, and that always returns nodes. The nodes should all be in the same document (though there are some cases, such as PrependIterator, where this is the responsibility of the user of the class and is not enforced.)

Field Summary

Fields inherited from interface net.sf.saxon.om.SequenceIterator
`GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD`

Method Summary
`Value` `atomize()` Return the atomized value of the current node.
`CharSequence` `getStringValue()` Return the string value of the current node.
`AxisIterator` `iterateAxis(byte axis, NodeTest test)` Return an iterator over an axis, starting at the current node.
`boolean` `moveNext()` Move to the next node, without returning it.

Methods inherited from interface net.sf.saxon.tree.iter.UnfailingIterator
`current, getAnother, next, position`

Methods inherited from interface net.sf.saxon.om.SequenceIterator
`close, getProperties`

Method Detail

### moveNext

    boolean moveNext()

  Move to the next node, without returning it. Returns true if there is a next node, false if the end of the sequence has been reached. After calling this method, the current node may be retrieved using the current() function.

### iterateAxis

    AxisIterator iterateAxis(byte axis,
                             NodeTest test)

  Return an iterator over an axis, starting at the current node.

  Parameters:
    `axis` - the axis to iterate over, using a constant such as `Axis.CHILD`
    `test` - a predicate to apply to the nodes before returning them.
  Throws:
    `NullPointerException` - if there is no current node

### atomize

    Value atomize()
                  throws XPathException

  Return the atomized value of the current node.

  Returns:
    the atomized value.
  Throws:
    `NullPointerException` - if there is no current node
    `XPathException`

### getStringValue

    CharSequence getStringValue()

  Return the string value of the current node.

  Returns:
    the string value, as an instance of CharSequence.
  Throws:
    `NullPointerException` - if there is no current node

Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.