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