Module org.apache.jena.core

Package org.apache.jena.reasoner.rulesys.impl

Class RETETerminal

java.lang.Object

org.apache.jena.reasoner.rulesys.impl.RETETerminal

All Implemented Interfaces:

RETENode, RETESinkNode

public class RETETerminal
extends Object
implements RETESinkNode

The final node in a RETE graph. It runs the builtin guard clauses and then, if the token passes, executes the head operations.

Constructor Summary

Constructors

Constructor	Description
RETETerminal(Rule rule, RETEEngine engine, ForwardRuleInfGraphI graph)	Constructor.

Method Summary

Modifier and Type	Method	Description
RETENode	clone(Map<RETENode,RETENode> netCopy, RETERuleContext contextIn)	Clone this node in the network.
void	fire(BindingVector env, boolean isAdd)	Propagate a token to this node.
void	setContext(RETEEngine engine, ForwardRuleInfGraphI graph)	Change the engine/graph to which this terminal should deliver its results.

Methods inherited from class java.lang.Object

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

Constructor Details

RETETerminal

public RETETerminal(Rule rule,
 RETEEngine engine,
 ForwardRuleInfGraphI graph)

Constructor.

Parameters:

rule - the rule which this terminal should fire.

engine - the parent rule engine through which the deductions and recursive network can be reached.

graph - the wider encompassing infGraph needed to for the RuleContext

Method Details

setContext

public void setContext(RETEEngine engine,
 ForwardRuleInfGraphI graph)

Change the engine/graph to which this terminal should deliver its results.

fire

public void fire(BindingVector env,
 boolean isAdd)

Propagate a token to this node.

Specified by:

fire in interface RETESinkNode

Parameters:

env - a set of variable bindings for the rule being processed.

isAdd - distinguishes between add and remove operations.

clone

public RETENode clone(Map<RETENode,RETENode> netCopy,
 RETERuleContext contextIn)

Clone this node in the network.

Specified by:

clone in interface RETENode

Parameters:

netCopy - a map from RETENode to cloned instance

contextIn - the new context to which the network is being ported