Examples with RuleSet fr.lirmm.graphik.graal.api.core.RuleSet used on opensource projects

Example 31 with RuleSet

use of fr.lirmm.graphik.graal.api.core.RuleSet in project graal by graphik-team.

the class DefaultKnowledgeBase method query.

@Override
public CloseableIterator<Substitution> query(Query query) throws KnowledgeBaseException {
    if (this.isSaturated) {
        try {
            return SmartHomomorphism.instance().execute(query, this.store);
        } catch (HomomorphismException e) {
            throw new KnowledgeBaseException(e);
        }
    } else if (query instanceof ConjunctiveQuery) {
        ConjunctiveQuery cq = (ConjunctiveQuery) query;
        this.analyse();
        if (this.analyse.isDecidable() && (!this.getApproach().equals(Approach.REWRITING_ONLY) || this.getFESRuleSet().isEmpty()) && (!this.getApproach().equals(Approach.SATURATION_ONLY) || this.getFUSRuleSet().isEmpty())) {
            try {
                this.fesSaturate();
                this.compileRule();
                RuleSet fusRuleSet = this.getFUSRuleSet();
                PureRewriter pure = new PureRewriter(false);
                CloseableIteratorWithoutException<ConjunctiveQuery> it = pure.execute(cq, fusRuleSet, this.ruleCompilation);
                UnionOfConjunctiveQueries ucq = new DefaultUnionOfConjunctiveQueries(cq.getAnswerVariables(), it);
                CloseableIterator<Substitution> resultIt = null;
                try {
                    if (this.isSemiSaturated) {
                        resultIt = SmartHomomorphism.instance().execute(query, this.store);
                    } else {
                        resultIt = SmartHomomorphism.instance().execute(ucq, this.store, this.ruleCompilation);
                    }
                } catch (HomomorphismException e) {
                    if (this.getApproach().equals(Approach.REWRITING_FIRST)) {
                        it = PureRewriter.unfold(ucq, this.ruleCompilation);
                        ucq = new DefaultUnionOfConjunctiveQueries(cq.getAnswerVariables(), it);
                    } else {
                        this.semiSaturate();
                    }
                    resultIt = SmartHomomorphism.instance().execute(ucq, this.store);
                }
                return new FilterIterator<Substitution, Substitution>(resultIt, new UniqFilter<Substitution>());
            } catch (ChaseException e) {
                throw new KnowledgeBaseException(e);
            } catch (HomomorphismException e) {
                throw new KnowledgeBaseException(e);
            }
        } else {
            throw new KnowledgeBaseException("No decidable combinaison found with the defined approach: " + this.getApproach());
        }
    } else {
        throw new KnowledgeBaseException("No implementation found for this kind of query: " + query.getClass());
    }
}

Example 32 with RuleSet

use of fr.lirmm.graphik.graal.api.core.RuleSet in project graal by graphik-team.

the class MSAProperty method check.

@Override
public int check(AnalyserRuleSet ruleSet) {
    RuleSet R = translateToMSA(ruleSet);
    AtomSet A = Rules.criticalInstance(ruleSet);
    try {
        StaticChase.executeChase(A, R);
    } catch (ChaseException e) {
        LOGGER.warn("An error occurs during the chase: ", e);
        return 0;
    }
    DefaultConjunctiveQuery Q = new DefaultConjunctiveQuery();
    DefaultAtom q = new DefaultAtom(C);
    q.setTerm(0, FAKE);
    Q.getAtomSet().add(q);
    try {
        if (SmartHomomorphism.instance().exist(Q, A))
            return -1;
        return 1;
    } catch (HomomorphismException e) {
        LOGGER.warn("An error occurs during the homomorphism: ", e);
        return 0;
    }
}

Example 33 with RuleSet

use of fr.lirmm.graphik.graal.api.core.RuleSet in project graal by graphik-team.

the class MSAProperty method translateToMSA.

public static RuleSet translateToMSA(Iterable<Rule> rules) {
    RuleSet R = new LinkedListRuleSet();
    for (Rule r : rules) {
        for (Rule r2 : translateRuleToMSA(r)) R.add(r2);
    }
    DefaultRule rule = new DefaultRule();
    Atom s = new DefaultAtom(S);
    s.setTerm(0, DefaultTermFactory.instance().createVariable("X1"));
    s.setTerm(1, DefaultTermFactory.instance().createVariable("X2"));
    Atom d = new DefaultAtom(D);
    d.setTerm(0, DefaultTermFactory.instance().createVariable("X1"));
    d.setTerm(1, DefaultTermFactory.instance().createVariable("X2"));
    rule.getBody().add(s);
    rule.getHead().add(d);
    R.add(rule);
    s = new DefaultAtom(S);
    d = new DefaultAtom(D);
    Atom d2 = new DefaultAtom(D);
    d.setTerm(0, DefaultTermFactory.instance().createVariable("X1"));
    d.setTerm(1, DefaultTermFactory.instance().createVariable("X2"));
    s.setTerm(0, DefaultTermFactory.instance().createVariable("X2"));
    s.setTerm(1, DefaultTermFactory.instance().createVariable("X3"));
    d2.setTerm(0, DefaultTermFactory.instance().createVariable("X1"));
    d2.setTerm(1, DefaultTermFactory.instance().createVariable("X3"));
    rule = new DefaultRule();
    rule.getBody().add(d);
    rule.getBody().add(s);
    rule.getHead().add(d2);
    R.add(rule);
    return R;
}

Example 34 with RuleSet

use of fr.lirmm.graphik.graal.api.core.RuleSet in project graal by graphik-team.

the class BackwardChainingTest method getBody1.

/**
 * c(X) :- b(X,Y,Y).
 *
 * getBody([X]) => b(X, Y, Y).
 *
 * @throws ParseException
 */
@Theory
public void getBody1(RulesCompilation compilation, RewritingOperator operator) throws ParseException {
    RuleSet rules = new LinkedListRuleSet();
    rules.add(DlgpParser.parseRule("p(X) :- q(X,Y,Y)."));
    ConjunctiveQuery query = DlgpParser.parseQuery("?(X) :- p(X).");
    compilation.compile(rules.iterator());
    PureRewriter bc = new PureRewriter(operator, true);
    CloseableIteratorWithoutException<? extends ConjunctiveQuery> rewIt = bc.execute(query, rules, compilation);
    boolean isFound = false;
    while (rewIt.hasNext()) {
        ConjunctiveQuery rew = rewIt.next();
        CloseableIteratorWithoutException<Atom> it = rew.getAtomSet().iterator();
        if (it.hasNext()) {
            Atom a = it.next();
            if (a.getPredicate().equals(new Predicate("q", 3))) {
                isFound = true;
                List<Term> terms = a.getTerms();
                Assert.assertEquals(terms.get(1), terms.get(2));
            }
        }
    }
    Assert.assertTrue("Rewrite not found", isFound);
}

Example 35 with RuleSet

use of fr.lirmm.graphik.graal.api.core.RuleSet in project graal by graphik-team.

the class BackwardChainingTest method queriesCover.

@Theory
public void queriesCover(RulesCompilation compilation, RewritingOperator operator) throws IteratorException, ParseException {
    RuleSet rules = new LinkedListRuleSet();
    rules.add(DlgpParser.parseRule("p(X) :- r(Y, X)."));
    ConjunctiveQuery query = DlgpParser.parseQuery("?(X) :- p(X), r(a,X).");
    compilation.compile(rules.iterator());
    PureRewriter bc = new PureRewriter(operator, true);
    CloseableIterator<? extends ConjunctiveQuery> it = bc.execute(query, rules, compilation);
    int i = Iterators.count(it);
    Assert.assertEquals(1, i);
}