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

Example 6 with MultiUnifierImpl

use of ai.grakn.graql.internal.reasoner.MultiUnifierImpl 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());
}