org.treetank.service.xml.xpath.expr

Class InstanceOfExpr

java.lang.Object

org.treetank.axis.AbsAxis

org.treetank.service.xml.xpath.expr.AbsExpression

org.treetank.service.xml.xpath.expr.InstanceOfExpr

All Implemented Interfaces:

Iterable<Long>, Iterator<Long>

public class InstanceOfExpr
extends AbsExpression

InstanceOfExpr

The boolean instance of expression returns true if the value of its first operand matches the SequenceType in its second operand, according to the rules for SequenceType matching; otherwise it returns false.

Constructor Summary

Constructors

Constructor and Description
InstanceOfExpr(INodeReadTrx mRtx, AbsAxis mInputExpr, SequenceType mSequenceType) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
AtomicValue	evaluate() Performs the expression dependent evaluation of the expression.
void	reset(long mNodeKey) Resetting the nodekey of this axis to a given nodekey.

Methods inherited from class org.treetank.service.xml.xpath.expr.AbsExpression

hasNext

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

InstanceOfExpr

public InstanceOfExpr(INodeReadTrx mRtx,
              AbsAxis mInputExpr,
              SequenceType mSequenceType)

Constructor. Initializes the internal state.

Parameters:

mRtx - Exclusive (immutable) trx to iterate with.

mInputExpr - input expression, to test

mSequenceType - sequence type to test whether the input sequence matches to.

Method Detail

reset

public void reset(long mNodeKey)

Resetting the nodekey of this axis to a given nodekey.

Overrides:

reset in class AbsExpression

Parameters:

mNodeKey - the nodekey where the reset should occur to.

evaluate

public AtomicValue evaluate()

Performs the expression dependent evaluation of the expression. (Template method)

Specified by:

evaluate in class AbsExpression