Package tools.refinery.interpreter.rete.index

Class ExistenceNode

java.lang.Object

tools.refinery.interpreter.rete.network.BaseNode

tools.refinery.interpreter.rete.network.StandardNode

tools.refinery.interpreter.rete.index.DualInputNode

tools.refinery.interpreter.rete.index.ExistenceNode

All Implemented Interfaces:

NetworkStructureChangeSensitiveNode, Node, Supplier

public class ExistenceNode
extends DualInputNode

Propagates all substitutions arriving at the PRIMARY slot if and only if (a matching substitution on the SECONDARY is present) xor (NEGATIVE). The negative parameter specifies whether this node checks for existence or non-existence.

It is mandatory in differential dataflow evaluation that the secondary parent is in an upstream dependency component (so that every secondary tuple comes with zero timestamp).

Nested Class Summary

Nested classes/interfaces inherited from class tools.refinery.interpreter.rete.index.DualInputNode

DualInputNode.NetworkStructureChangeSensitiveLogic, DualInputNode.Side

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	negative

Fields inherited from class tools.refinery.interpreter.rete.index.DualInputNode

coincidence, complementerSecondaryMask, indexerGroupCache, logic, primarySlot, secondarySlot

Fields inherited from class tools.refinery.interpreter.rete.network.StandardNode

childMailboxes, children

Fields inherited from class tools.refinery.interpreter.rete.network.BaseNode

nodeId, reteContainer, tag, traceInfos

Constructor Summary

Constructors

Constructor	Description
ExistenceNode(ReteContainer reteContainer, boolean negative)

Method Summary

Modifier and Type	Method	Description
Tuple	calibrate(Tuple primary, Tuple secondary)	Simulates the behavior of the node for calibration purposes only.
protected DualInputNode.NetworkStructureChangeSensitiveLogic	createTimelessLogic()
protected DualInputNode.NetworkStructureChangeSensitiveLogic	createTimelyLogic()
void	networkStructureChanged()	At the time of the invocation, the dependency graph has already been updated.

Methods inherited from class tools.refinery.interpreter.rete.index.DualInputNode

assignTraceInfo, connectToIndexers, createLogic, getPrimarySlot, getSecondarySlot, getSlot, getTimeline, pullInto, pullIntoWithTimeline, refreshIndexerGroupCache, retrieveOpposites, setComplementerSecondaryMask, unify, unify

Methods inherited from class tools.refinery.interpreter.rete.network.StandardNode

appendChild, constructIndex, getChildMailboxes, getPulledContents, getReceivers, issueError, propagateUpdate, removeChild

Methods inherited from class tools.refinery.interpreter.rete.network.BaseNode

acceptPropagatedTraceInfo, getContainer, getNodeId, getTag, getTraceInfoPatternsEnumerated, getTraceInfos, setTag, toString, toStringCore

Methods inherited from class java.lang.Object

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

Methods inherited from interface tools.refinery.interpreter.rete.network.Node

acceptPropagatedTraceInfo, getCommunicationTracker, getContainer, getNodeId, getTag, getTraceInfos, setTag

Methods inherited from interface tools.refinery.interpreter.rete.network.Supplier

getPulledContents

Field Details

negative

protected boolean negative

Constructor Details

ExistenceNode

public ExistenceNode(ReteContainer reteContainer,
 boolean negative)

Parameters:

reteContainer -

negative - if false, act as existence checker, otherwise a nonexistence-checker

Method Details

calibrate

public Tuple calibrate(Tuple primary,
 Tuple secondary)

Description copied from class: DualInputNode

Simulates the behavior of the node for calibration purposes only.

Specified by:

calibrate in class DualInputNode

networkStructureChanged

public void networkStructureChanged()

Description copied from interface: NetworkStructureChangeSensitiveNode

At the time of the invocation, the dependency graph has already been updated.

Specified by:

networkStructureChanged in interface NetworkStructureChangeSensitiveNode

Overrides:

networkStructureChanged in class DualInputNode

createTimelessLogic

protected DualInputNode.NetworkStructureChangeSensitiveLogic createTimelessLogic()

Specified by:

createTimelessLogic in class DualInputNode

createTimelyLogic

protected DualInputNode.NetworkStructureChangeSensitiveLogic createTimelyLogic()

Specified by:

createTimelyLogic in class DualInputNode