com.icl.saxon.om
Class PrependIterator

java.lang.Object
  com.icl.saxon.om.PrependIterator

All Implemented Interfaces:

LastPositionFinder, AxisEnumeration, NodeEnumeration

public class PrependIterator
extends java.lang.Object
implements AxisEnumeration

An iterator over nodes, that prepends a given node to the nodes returned by another iterator. Used to modify an iterator over axis A to one that iterates over A-OR-SELF.

Field Summary

(package private) AxisEnumeration	base
(package private) int	position
(package private) NodeInfo	start

Constructor Summary

PrependIterator(NodeInfo start, AxisEnumeration base)

Method Summary

int	getLastPosition() Get the last position
boolean	hasMoreElements() Determine whether there are more nodes to come.
boolean	isPeer() Determine whether the nodes returned by this enumeration are known to be peers, that is, no node is a descendant or ancestor of another node.
boolean	isReverseSorted() Determine whether the nodes returned by this enumeration are known to be in reverse document order.
boolean	isSorted() Determine whether the nodes returned by this enumeration are known to be in document order
NodeInfo	nextElement() 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

Field Detail

start

NodeInfo start

base

AxisEnumeration base

position

int position

Constructor Detail

PrependIterator

public PrependIterator(NodeInfo start,
                       AxisEnumeration base)

Method Detail

hasMoreElements

public boolean hasMoreElements()

Determine whether there are more nodes to come.
(Note the term "Element" is used here in the sense of the standard Java Enumeration class, it has nothing to do with XML elements).

Specified by:

hasMoreElements in interface AxisEnumeration

Specified by:

hasMoreElements in interface NodeEnumeration

Returns:

true if there are more nodes

nextElement

public NodeInfo nextElement()

Get the next item in the sequence.

Specified by:

nextElement in interface AxisEnumeration

Specified by:

nextElement in interface NodeEnumeration

Returns:

the next Item. If there are no more nodes, return null.

isPeer

public boolean isPeer()

Determine whether the nodes returned by this enumeration are known to be peers, that is, no node is a descendant or ancestor of another node. This significance of this property is that if a peer enumeration is applied to each node in a set derived from another peer enumeration, and if both enumerations are sorted, then the result is also sorted.

Specified by:

isPeer in interface NodeEnumeration

isReverseSorted

public boolean isReverseSorted()

Determine whether the nodes returned by this enumeration are known to be in reverse document order.

Specified by:

isReverseSorted in interface NodeEnumeration

Returns:

true if the nodes are guaranteed to be in document order.

isSorted

public boolean isSorted()

Determine whether the nodes returned by this enumeration are known to be in document order

Specified by:

isSorted in interface NodeEnumeration

Returns:

true if the nodes are guaranteed to be in document order.

getLastPosition

public int getLastPosition()

Get the last position

Specified by:

getLastPosition in interface LastPositionFinder

Specified by:

getLastPosition in interface AxisEnumeration