org.treetank.service.xml.xpath.expr

Class EveryExpr

java.lang.Object

org.treetank.axis.AbsAxis

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

org.treetank.service.xml.xpath.expr.EveryExpr

All Implemented Interfaces:

Iterable<Long>, Iterator<Long>

public class EveryExpr
extends AbsExpression

EveryExpr

IAxis that represents the quantified expression "every".

The quantified expression is true if every evaluation of the test expression has the effective boolean value true; otherwise the quantified expression is false. This rule implies that, if the in-clauses generate zero binding tuples, the value of the quantified expression is true.

Constructor Summary

Constructors

Constructor and Description
EveryExpr(INodeReadTrx rtx, List<AbsAxis> mVars, AbsAxis mSatisfy) 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

EveryExpr

public EveryExpr(INodeReadTrx rtx,
         List<AbsAxis> mVars,
         AbsAxis mSatisfy)

Constructor. Initializes the internal state.

Parameters:

rtx - Exclusive (immutable) trx to iterate with.

mVars - Variables for which the condition must be satisfied

mSatisfy - condition every item of the variable results must satisfy in order to evaluate expression to true

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