org.treetank.service.xml.xpath.axis

Class VariableAxis

java.lang.Object

org.treetank.axis.AbsAxis

org.treetank.service.xml.xpath.axis.VariableAxis

All Implemented Interfaces:

Iterable<Long>, Iterator<Long>

public class VariableAxis
extends AbsAxis

VariableAxis

Evaluated the given binding sequence, the variable is bound to and stores in a list that can be accessed by other sequences and notifies its observers, as soon as a new value of the binding sequence has been evaluated.

Constructor Summary

Constructors

Constructor and Description
VariableAxis(INodeReadTrx rtx, AbsAxis mInSeq) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	addObserver(VarRefExpr mObserver) Add an observer to the list.
boolean	hasNext()
void	reset(long mNodeKey) Resetting the nodekey of this axis to a given nodekey.

Methods inherited from class org.treetank.axis.AbsAxis

addAtomicToItemList, close, getItemList, getNode, getStartKey, isSelfIncluded, iterator, moveTo, next, remove, resetToLastKey, resetToStartKey

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VariableAxis

public VariableAxis(INodeReadTrx rtx,
            AbsAxis mInSeq)

Constructor. Initializes the internal state.

Parameters:

rtx - Exclusive (immutable) trx to iterate with.

mInSeq - sequence, the variable is bound to.

Method Detail

reset

public void reset(long mNodeKey)

Resetting the nodekey of this axis to a given nodekey.

Overrides:

reset in class AbsAxis

Parameters:

mNodeKey - the nodekey where the reset should occur to.

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Long>

Specified by:

hasNext in class AbsAxis

addObserver

public void addObserver(VarRefExpr mObserver)

Add an observer to the list.

Parameters:

mObserver - axis that wants to be notified of any change of this axis