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Example 1 with UniqFilter

use of fr.lirmm.graphik.util.stream.filter.UniqFilter in project graal by graphik-team.

the class DefaultKnowledgeBase method query.

@Override
public CloseableIterator<Substitution> query(Query query, long timeout) throws KnowledgeBaseException, TimeoutException {
    long remainingTime = timeout;
    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;
        if (this.approach != Approach.REWRITING_ONLY && this.approach != Approach.SATURATION_ONLY) {
            this.analyse();
        }
        if (this.approach == Approach.REWRITING_ONLY || this.approach == Approach.SATURATION_ONLY || this.analyse.isDecidable()) {
            try {
                long time = System.currentTimeMillis();
                this.fesSaturate(remainingTime);
                if (timeout > 0) {
                    remainingTime -= (System.currentTimeMillis() - time);
                    if (remainingTime <= 0) {
                        throw new TimeoutException(timeout);
                    }
                }
                this.compileRule();
                RuleSet fusRuleSet = this.getFUSRuleSet();
                PureRewriter pure = new PureRewriter(false);
                CloseableIteratorWithoutException<ConjunctiveQuery> it = pure.execute(cq, fusRuleSet, this.ruleCompilation, remainingTime);
                UnionOfConjunctiveQueries ucq = new DefaultUnionOfConjunctiveQueries(cq.getAnswerVariables(), it);
                CloseableIterator<Substitution> resultIt = null;
                try {
                    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());
    }
}
Also used : DefaultUnionOfConjunctiveQueries(fr.lirmm.graphik.graal.core.DefaultUnionOfConjunctiveQueries) AnalyserRuleSet(fr.lirmm.graphik.graal.rulesetanalyser.util.AnalyserRuleSet) RuleSet(fr.lirmm.graphik.graal.api.core.RuleSet) LinkedListRuleSet(fr.lirmm.graphik.graal.core.ruleset.LinkedListRuleSet) CloseableIterator(fr.lirmm.graphik.util.stream.CloseableIterator) HomomorphismException(fr.lirmm.graphik.graal.api.homomorphism.HomomorphismException) PureRewriter(fr.lirmm.graphik.graal.backward_chaining.pure.PureRewriter) KnowledgeBaseException(fr.lirmm.graphik.graal.api.kb.KnowledgeBaseException) UniqFilter(fr.lirmm.graphik.util.stream.filter.UniqFilter) ChaseException(fr.lirmm.graphik.graal.api.forward_chaining.ChaseException) CloseableIteratorWithoutException(fr.lirmm.graphik.util.stream.CloseableIteratorWithoutException) DefaultUnionOfConjunctiveQueries(fr.lirmm.graphik.graal.core.DefaultUnionOfConjunctiveQueries) UnionOfConjunctiveQueries(fr.lirmm.graphik.graal.api.core.UnionOfConjunctiveQueries) Substitution(fr.lirmm.graphik.graal.api.core.Substitution) ConjunctiveQuery(fr.lirmm.graphik.graal.api.core.ConjunctiveQuery) TimeoutException(fr.lirmm.graphik.graal.api.util.TimeoutException)

Example 2 with UniqFilter

use of fr.lirmm.graphik.util.stream.filter.UniqFilter 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());
    }
}
Also used : DefaultUnionOfConjunctiveQueries(fr.lirmm.graphik.graal.core.DefaultUnionOfConjunctiveQueries) AnalyserRuleSet(fr.lirmm.graphik.graal.rulesetanalyser.util.AnalyserRuleSet) RuleSet(fr.lirmm.graphik.graal.api.core.RuleSet) LinkedListRuleSet(fr.lirmm.graphik.graal.core.ruleset.LinkedListRuleSet) CloseableIterator(fr.lirmm.graphik.util.stream.CloseableIterator) HomomorphismException(fr.lirmm.graphik.graal.api.homomorphism.HomomorphismException) PureRewriter(fr.lirmm.graphik.graal.backward_chaining.pure.PureRewriter) KnowledgeBaseException(fr.lirmm.graphik.graal.api.kb.KnowledgeBaseException) UniqFilter(fr.lirmm.graphik.util.stream.filter.UniqFilter) ChaseException(fr.lirmm.graphik.graal.api.forward_chaining.ChaseException) CloseableIteratorWithoutException(fr.lirmm.graphik.util.stream.CloseableIteratorWithoutException) DefaultUnionOfConjunctiveQueries(fr.lirmm.graphik.graal.core.DefaultUnionOfConjunctiveQueries) UnionOfConjunctiveQueries(fr.lirmm.graphik.graal.api.core.UnionOfConjunctiveQueries) Substitution(fr.lirmm.graphik.graal.api.core.Substitution) ConjunctiveQuery(fr.lirmm.graphik.graal.api.core.ConjunctiveQuery)

Aggregations

ConjunctiveQuery (fr.lirmm.graphik.graal.api.core.ConjunctiveQuery)2 RuleSet (fr.lirmm.graphik.graal.api.core.RuleSet)2 Substitution (fr.lirmm.graphik.graal.api.core.Substitution)2 UnionOfConjunctiveQueries (fr.lirmm.graphik.graal.api.core.UnionOfConjunctiveQueries)2 ChaseException (fr.lirmm.graphik.graal.api.forward_chaining.ChaseException)2 HomomorphismException (fr.lirmm.graphik.graal.api.homomorphism.HomomorphismException)2 KnowledgeBaseException (fr.lirmm.graphik.graal.api.kb.KnowledgeBaseException)2 PureRewriter (fr.lirmm.graphik.graal.backward_chaining.pure.PureRewriter)2 DefaultUnionOfConjunctiveQueries (fr.lirmm.graphik.graal.core.DefaultUnionOfConjunctiveQueries)2 LinkedListRuleSet (fr.lirmm.graphik.graal.core.ruleset.LinkedListRuleSet)2 AnalyserRuleSet (fr.lirmm.graphik.graal.rulesetanalyser.util.AnalyserRuleSet)2 CloseableIterator (fr.lirmm.graphik.util.stream.CloseableIterator)2 CloseableIteratorWithoutException (fr.lirmm.graphik.util.stream.CloseableIteratorWithoutException)2 UniqFilter (fr.lirmm.graphik.util.stream.filter.UniqFilter)2 TimeoutException (fr.lirmm.graphik.graal.api.util.TimeoutException)1