Examples with Match ai.grakn.graql.Match used on opensource projects

Example 46 with Match

use of ai.grakn.graql.Match in project grakn by graknlabs.

the class MatchTest method testResourceMatch.

@Test
public void testResourceMatch() throws ParseException {
    Match query = qb.match(x.has("release-date", LocalDate.of(1986, 3, 3).atStartOfDay()));
    assertThat(query, variable(x, contains(spy)));
}

Example 47 with Match

use of ai.grakn.graql.Match in project grakn by graknlabs.

the class MatchTest method testMovieQuery.

@Test
public void testMovieQuery() {
    Match query = qb.match(x.isa("movie"));
    assertThat(query, variable(x, containsAllMovies));
}

Example 48 with Match

use of ai.grakn.graql.Match in project grakn by graknlabs.

the class MatchTest method testMatchAllPairs.

@Test
public void testMatchAllPairs() {
    int numConcepts = (int) qb.match(x).stream().count();
    Match pairs = qb.match(x, y);
    // We expect there to be a result for every pair of concepts
    assertThat(pairs, iterableWithSize(numConcepts * numConcepts));
}

Example 49 with Match

use of ai.grakn.graql.Match in project grakn by graknlabs.

the class QueryToStringTest method whenCallingToStringOnAQueryWithAContainsPredicate_ResultIsCorrect.

@Test
public void whenCallingToStringOnAQueryWithAContainsPredicate_ResultIsCorrect() {
    Match match = match(var("x").val(contains(var("y"))));
    assertEquals("match $x val contains $y;", match.toString());
}

Example 50 with Match

use of ai.grakn.graql.Match in project grakn by graknlabs.

the class MatchInfer method stream.

@Override
public Stream<Answer> stream(Optional<EmbeddedGraknTx<?>> optionalGraph) {
    // If the tx is not embedded, treat it like there is no transaction
    // TODO: this is dodgy - when queries don't contain transactions this can be fixed
    EmbeddedGraknTx<?> tx = optionalOr(optionalGraph, inner.tx().filter(t -> t instanceof EmbeddedGraknTx).map(t -> (EmbeddedGraknTx<?>) t)).orElseThrow(GraqlQueryException::noTx);
    if (!RuleUtils.hasRules(tx))
        return inner.stream(optionalGraph);
    validatePattern(tx);
    try {
        Iterator<Conjunction<VarPatternAdmin>> conjIt = getPattern().getDisjunctiveNormalForm().getPatterns().iterator();
        Conjunction<VarPatternAdmin> conj = conjIt.next();
        ReasonerQuery conjQuery = ReasonerQueries.create(conj, tx);
        conjQuery.checkValid();
        Stream<Answer> answerStream = conjQuery.isRuleResolvable() ? conjQuery.resolve(materialise) : tx.graql().infer(false).match(conj).stream();
        while (conjIt.hasNext()) {
            conj = conjIt.next();
            conjQuery = ReasonerQueries.create(conj, tx);
            Stream<Answer> localStream = conjQuery.isRuleResolvable() ? conjQuery.resolve(materialise) : tx.graql().infer(false).match(conj).stream();
            answerStream = Stream.concat(answerStream, localStream);
        }
        return answerStream.map(result -> result.project(getSelectedNames()));
    } catch (GraqlQueryException e) {
        System.err.println(e.getMessage());
        return Stream.empty();
    }
}