Module org.apache.jena.core

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

Class GenericTripleMatchFrame

java.lang.Object

org.apache.jena.reasoner.rulesys.impl.FrameObject

org.apache.jena.reasoner.rulesys.impl.GenericChoiceFrame

org.apache.jena.reasoner.rulesys.impl.GenericTripleMatchFrame

Direct Known Subclasses:

ConsumerChoicePointFrame, TripleMatchFrame

public class GenericTripleMatchFrame
extends GenericChoiceFrame

Frame on the choice point stack used to represent the state of some form of triple match - this is either a direct graph query or a query to a cached set of results.

This is used in the inner loop of the interpreter and so is a pure data structure not an abstract data type and assumes privileged access to the interpreter state.

Constructor Summary

Constructors

Constructor	Description
GenericTripleMatchFrame()

Method Summary

Modifier and Type	Method	Description
boolean	bindResult(Triple triple, LPInterpreter interpreter)	Bind the goal variables to the given result triple.
boolean	functorMatch(Triple t, LPInterpreter interpreter)	Check that the object of a triple match corresponds to the given functor pattern.
void	init(LPInterpreter interpreter)	Initialize the triple match to preserve the current context of the given LPInterpreter and search for the match defined by the current argument registers

Methods inherited from class org.apache.jena.reasoner.rulesys.impl.GenericChoiceFrame

setContinuation

Methods inherited from class org.apache.jena.reasoner.rulesys.impl.FrameObject

close, fastLinkTo, getLink, linkTo

Methods inherited from class java.lang.Object

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

Constructor Details

GenericTripleMatchFrame

public GenericTripleMatchFrame()

Method Details

bindResult

public boolean bindResult(Triple triple,
 LPInterpreter interpreter)

Bind the goal variables to the given result triple. Returns false if the triple doesn't match the goal (due to a functor match failure).

functorMatch

public boolean functorMatch(Triple t,
 LPInterpreter interpreter)

Check that the object of a triple match corresponds to the given functor pattern. Side effects the variable bindings.

init

public void init(LPInterpreter interpreter)

Initialize the triple match to preserve the current context of the given LPInterpreter and search for the match defined by the current argument registers

Overrides:

init in class GenericChoiceFrame

Parameters:

interpreter - the interpreter instance whose env, trail and arg values are to be preserved