Package com.hp.hpl.jena.reasoner.rulesys

Examples of com.hp.hpl.jena.reasoner.rulesys.ForwardRuleInfGraphI

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     * Execute a single rule firing.
     */
    public static void execute(RETERuleContext context, boolean isAdd) {
        Rule rule = context.getRule();
        BindingEnvironment env = context.getEnv();
        ForwardRuleInfGraphI infGraph = (ForwardRuleInfGraphI)context.getGraph();
        if (infGraph.shouldTrace()) {
            logger.info("Fired rule: " + rule.toShortString());
        }
        RETEEngine engine = context.getEngine();
        engine.incRuleCount();
        List<Triple> matchList = null;
        if (infGraph.shouldLogDerivations() && isAdd) {
            // Create derivation record
            matchList = new ArrayList<Triple>(rule.bodyLength());
            for (int i = 0; i < rule.bodyLength(); i++) {
                Object clause = rule.getBodyElement(i);
                if (clause instanceof TriplePattern) {
                    matchList.add(env.instantiate((TriplePattern)clause));
                }
            }
        }
        for (int i = 0; i < rule.headLength(); i++) {
            Object hClause = rule.getHeadElement(i);
            if (hClause instanceof TriplePattern) {
                Triple t = env.instantiate((TriplePattern) hClause);
                // Used to filter out triples with literal subjects
                // but this is not necessary
                // if (!t.getSubject().isLiteral()) {
                    // Only add the result if it is legal at the RDF level.
                    // E.g. RDFS rules can create assertions about literals
                    // that we can't record in RDF
                    if (isAdd) {
                        if ( ! context.contains(t) ) {
                            engine.addTriple(t, true);
                            if (infGraph.shouldLogDerivations()) {
                                infGraph.logDerivation(t, new RuleDerivation(rule, t, matchList, infGraph));
                            }
                        }
                    } else {
                        if ( context.contains(t)) {
                            // Remove the generated triple
                            engine.deleteTriple(t, true);
                        }
                    }
              // }
            } else if (hClause instanceof Functor && isAdd) {
                Functor f = (Functor)hClause;
                Builtin imp = f.getImplementor();
                if (imp != null) {
                    imp.headAction(f.getBoundArgs(env), f.getArgLength(), context);
                } else {
                    throw new ReasonerException("Invoking undefined Functor " + f.getName() +" in " + rule.toShortString());
                }
            } else if (hClause instanceof Rule) {
                Rule r = (Rule)hClause;
                if (r.isBackward()) {
                    if (isAdd) {
                        infGraph.addBRule(r.instantiate(env));
                    } else {
                        infGraph.deleteBRule(r.instantiate(env));
                    }
                } else {
                    throw new ReasonerException("Found non-backward subrule : " + r);
                }
            }
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     * Execute a single rule firing.
     */
    public static void execute(RETERuleContext context, boolean isAdd) {
        Rule rule = context.getRule();
        BindingEnvironment env = context.getEnv();
        ForwardRuleInfGraphI infGraph = (ForwardRuleInfGraphI)context.getGraph();
        if (infGraph.shouldTrace()) {
            logger.info("Fired rule: " + rule.toShortString());
        }
        RETEEngine engine = context.getEngine();
        engine.incRuleCount();
        List<Triple> matchList = null;
        if (infGraph.shouldLogDerivations() && isAdd) {
            // Create derivation record
            matchList = new ArrayList<>(rule.bodyLength());
            for (int i = 0; i < rule.bodyLength(); i++) {
                Object clause = rule.getBodyElement(i);
                if (clause instanceof TriplePattern) {
                    matchList.add(env.instantiate((TriplePattern)clause));
                }
            }
        }
        for (int i = 0; i < rule.headLength(); i++) {
            Object hClause = rule.getHeadElement(i);
            if (hClause instanceof TriplePattern) {
                Triple t = env.instantiate((TriplePattern) hClause);
                // Used to filter out triples with literal subjects
                // but this is not necessary
                // if (!t.getSubject().isLiteral()) {
                    // Only add the result if it is legal at the RDF level.
                    // E.g. RDFS rules can create assertions about literals
                    // that we can't record in RDF
                    if (isAdd) {
                        if ( ! context.contains(t) ) {
                            engine.addTriple(t, true);
                            if (infGraph.shouldLogDerivations()) {
                                infGraph.logDerivation(t, new RuleDerivation(rule, t, matchList, infGraph));
                            }
                        }
                    } else {
                        if ( context.contains(t)) {
                            // Remove the generated triple
                            engine.deleteTriple(t, true);
                        }
                    }
              // }
            } else if (hClause instanceof Functor && isAdd) {
                Functor f = (Functor)hClause;
                Builtin imp = f.getImplementor();
                if (imp != null) {
                    imp.headAction(f.getBoundArgs(env), f.getArgLength(), context);
                } else {
                    throw new ReasonerException("Invoking undefined Functor " + f.getName() +" in " + rule.toShortString());
                }
            } else if (hClause instanceof Rule) {
                Rule r = (Rule)hClause;
                if (r.isBackward()) {
                    if (isAdd) {
                        infGraph.addBRule(r.instantiate(env));
                    } else {
                        infGraph.deleteBRule(r.instantiate(env));
                    }
                } else {
                    throw new ReasonerException("Found non-backward subrule : " + r);
                }
            }
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        assertSame("The instance should have been replaced",
                   anotherFactory, FRuleEngineIFactory.getInstance());
    }
   
    public void testItShouldInstantiateAFRuleEngineIfUseRETEisFalse() {
        ForwardRuleInfGraphI infGraph = new DummyForwardRuleInfGraph();
        FRuleEngineI engine =
                FRuleEngineIFactory.getInstance().createFRuleEngineI(infGraph, null, false);

        assertSame("A FRuleEngine should have been instantiated", FRuleEngine.class, engine.getClass());
    }
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        assertSame("A FRuleEngine should have been instantiated", FRuleEngine.class, engine.getClass());
    }

    public void testItShouldInstantiateAReteEngineIfUseRETEisTrue() {
        ForwardRuleInfGraphI infGraph = new DummyForwardRuleInfGraph();
        FRuleEngineI engine =
                FRuleEngineIFactory.getInstance().createFRuleEngineI(infGraph, null, true);

        assertSame("A RETEEngine should have been instantiated", RETEEngine.class, engine.getClass());
    }
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     * Execute a single rule firing.
     */
    public static void execute(RETERuleContext context, boolean isAdd) {
        Rule rule = context.getRule();
        BindingEnvironment env = context.getEnv();
        ForwardRuleInfGraphI infGraph = (ForwardRuleInfGraphI)context.getGraph();
        if (infGraph.shouldTrace()) {
            logger.info("Fired rule: " + rule.toShortString());
        }
        RETEEngine engine = context.getEngine();
        engine.incRuleCount();
        List<Triple> matchList = null;
        if (infGraph.shouldLogDerivations() && isAdd) {
            // Create derivation record
            matchList = new ArrayList<Triple>(rule.bodyLength());
            for (int i = 0; i < rule.bodyLength(); i++) {
                Object clause = rule.getBodyElement(i);
                if (clause instanceof TriplePattern) {
                    matchList.add(env.instantiate((TriplePattern)clause));
                }
            }
        }
        for (int i = 0; i < rule.headLength(); i++) {
            Object hClause = rule.getHeadElement(i);
            if (hClause instanceof TriplePattern) {
                Triple t = env.instantiate((TriplePattern) hClause);
                // Used to filter out triples with literal subjects
                // but this is not necessary
                // if (!t.getSubject().isLiteral()) {
                    // Only add the result if it is legal at the RDF level.
                    // E.g. RDFS rules can create assertions about literals
                    // that we can't record in RDF
                    if (isAdd) {
                        if ( ! context.contains(t) ) {
                            engine.addTriple(t, true);
                            if (infGraph.shouldLogDerivations()) {
                                infGraph.logDerivation(t, new RuleDerivation(rule, t, matchList, infGraph));
                            }
                        }
                    } else {
                        if ( context.contains(t)) {
                            // Remove the generated triple
                            engine.deleteTriple(t, true);
                        }
                    }
              // }
            } else if (hClause instanceof Functor && isAdd) {
                Functor f = (Functor)hClause;
                Builtin imp = f.getImplementor();
                if (imp != null) {
                    imp.headAction(f.getBoundArgs(env), f.getArgLength(), context);
                } else {
                    throw new ReasonerException("Invoking undefined Functor " + f.getName() +" in " + rule.toShortString());
                }
            } else if (hClause instanceof Rule) {
                Rule r = (Rule)hClause;
                if (r.isBackward()) {
                    if (isAdd) {
                        infGraph.addBRule(r.instantiate(env));
                    } else {
                        infGraph.deleteBRule(r.instantiate(env));
                    }
                } else {
                    throw new ReasonerException("Found non-backward subrule : " + r);
                }
            }
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Related Classes of com.hp.hpl.jena.reasoner.rulesys.ForwardRuleInfGraphI

  • com.hp.hpl.jena.reasoner.rulesys.impl.RETEConflictSet
  • com.hp.hpl.jena.reasoner.rulesys.test.FRuleEngineIFactoryTest
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