Examples with LookupExplanation ai.grakn.graql.internal.reasoner.explanation.LookupExplanation used on opensource projects

Example 1 with LookupExplanation

use of ai.grakn.graql.internal.reasoner.explanation.LookupExplanation in project grakn by graknlabs.

the class LazyQueryCache method getAnswersWithUnifier.

@Override
public Pair<LazyAnswerIterator, MultiUnifier> getAnswersWithUnifier(Q query) {
    CacheEntry<Q, LazyAnswerIterator> match = this.getEntry(query);
    if (match != null) {
        Q equivalentQuery = match.query();
        MultiUnifier multiUnifier = equivalentQuery.getMultiUnifier(query);
        LazyAnswerIterator unified = match.cachedElement().unify(multiUnifier);
        return new Pair<>(unified, multiUnifier);
    }
    Stream<Answer> answerStream = record(query, query.getQuery().stream().map(a -> a.explain(new LookupExplanation(query))));
    return new Pair<>(new LazyAnswerIterator(answerStream), new MultiUnifierImpl());
}

Example 2 with LookupExplanation

use of ai.grakn.graql.internal.reasoner.explanation.LookupExplanation in project grakn by graknlabs.

the class LazyQueryCache method getAnswerStreamWithUnifier.

@Override
public Pair<Stream<Answer>, MultiUnifier> getAnswerStreamWithUnifier(Q query) {
    CacheEntry<Q, LazyAnswerIterator> match = this.getEntry(query);
    if (match != null) {
        Q equivalentQuery = match.query();
        MultiUnifier multiUnifier = equivalentQuery.getMultiUnifier(query);
        Stream<Answer> unified = match.cachedElement().stream().flatMap(a -> a.unify(multiUnifier));
        return new Pair<>(unified, multiUnifier);
    }
    Stream<Answer> answerStream = record(query, query.getQuery().stream().map(a -> a.explain(new LookupExplanation(query))));
    return new Pair<>(answerStream, new MultiUnifierImpl());
}

Example 3 with LookupExplanation

use of ai.grakn.graql.internal.reasoner.explanation.LookupExplanation in project grakn by graknlabs.

the class StructuralCache method get.

/**
 * @param query to be retrieved
 * @return answer stream of provided query
 */
public Stream<Answer> get(Q query) {
    Equivalence.Wrapper<Q> structQuery = equivalence.wrap(query);
    EmbeddedGraknTx<?> tx = query.tx();
    CacheEntry<Q, GraqlTraversal> match = structCache.get(structQuery);
    if (match != null) {
        Q equivalentQuery = match.query();
        GraqlTraversal traversal = match.cachedElement();
        Unifier unifier = equivalentQuery.getMultiUnifier(query, UnifierType.STRUCTURAL).getAny();
        Map<Var, ConceptId> idTransform = equivalentQuery.idTransform(query, unifier);
        ReasonerQueryImpl transformedQuery = equivalentQuery.transformIds(idTransform);
        return MatchBase.streamWithTraversal(transformedQuery.getPattern().commonVars(), tx, traversal.transform(idTransform)).map(ans -> ans.unify(unifier)).map(a -> a.explain(new LookupExplanation(query)));
    }
    GraqlTraversal traversal = GreedyTraversalPlan.createTraversal(query.getPattern(), tx);
    structCache.put(structQuery, new CacheEntry<>(query, traversal));
    return MatchBase.streamWithTraversal(query.getPattern().commonVars(), tx, traversal).map(a -> a.explain(new LookupExplanation(query)));
}