Examples with GroovyPredicate org.opencypher.gremlin.translation.groovy.GroovyPredicate used on opensource projects

Example 1 with GroovyPredicate

use of org.opencypher.gremlin.translation.groovy.GroovyPredicate in project cypher-for-gremlin by opencypher.

the class CypherOpProcessor method evalCypher.

private void evalCypher(Context context) throws OpProcessorException {
    Map<String, Object> args = context.getRequestMessage().getArgs();
    String cypher = (String) args.get(Tokens.ARGS_GREMLIN);
    logger.info("Cypher: {}", cypher.replaceAll("\n", " "));
    GraphTraversalSource gts = traversal(context);
    DefaultGraphTraversal g = new DefaultGraphTraversal(gts.clone());
    Map<String, Object> parameters = getParameters(args);
    CypherAstWrapper ast = CypherAstWrapper.parse(cypher, parameters);
    Translator<String, GroovyPredicate> stringTranslator = Translator.builder().gremlinGroovy().inlineParameters().build();
    String gremlin = ast.buildTranslation(stringTranslator);
    logger.info("Gremlin: {}", gremlin);
    if (ast.getOptions().contains(EXPLAIN)) {
        explainQuery(context, ast, gremlin);
        return;
    }
    Translator<GraphTraversal, P> traversalTranslator = Translator.builder().traversal(g).build();
    GraphTraversal<?, ?> traversal = ast.buildTranslation(traversalTranslator);
    ReturnNormalizer returnNormalizer = ReturnNormalizer.create(ast.getReturnTypes());
    Traversal<?, Map<String, Object>> normalizedTraversal = traversal.map(returnNormalizer::normalize);
    inTransaction(gts, () -> handleIterator(context, normalizedTraversal));
}

Example 2 with GroovyPredicate

use of org.opencypher.gremlin.translation.groovy.GroovyPredicate in project cypher-for-gremlin by opencypher.

the class GroovyCypherGremlinClient method submitAsync.

@Override
public CompletableFuture<CypherResultSet> submitAsync(String cypher, Map<String, ?> parameters) {
    CypherAstWrapper ast;
    try {
        ast = CypherAstWrapper.parse(cypher, parameters);
    } catch (Exception e) {
        return completedFuture(exceptional(e));
    }
    if (ast.getOptions().contains(EXPLAIN)) {
        return completedFuture(explain(ast));
    }
    Translator<String, GroovyPredicate> translator = Translator.builder().gremlinGroovy().build(flavor);
    String gremlin = ast.buildTranslation(translator);
    Map<String, Object> extractedParameters = ast.getExtractedParameters();
    CompletableFuture<ResultSet> resultSetFuture = client.submitAsync(gremlin, extractedParameters);
    ReturnNormalizer returnNormalizer = ReturnNormalizer.create(ast.getReturnTypes());
    return resultSetFuture.thenApply(ResultSet::iterator).thenApply(resultIterator -> new CypherResultSet(resultIterator, returnNormalizer::normalize));
}

Example 3 with GroovyPredicate

use of org.opencypher.gremlin.translation.groovy.GroovyPredicate in project cypher-for-gremlin by opencypher.

the class CommonResultSets method explain.

static CypherResultSet explain(CypherAstWrapper ast) {
    Map<String, Object> explanation = new LinkedHashMap<>();
    Translator<String, GroovyPredicate> translator = Translator.builder().gremlinGroovy().inlineParameters().build();
    explanation.put("translation", ast.buildTranslation(translator));
    explanation.put("options", ast.getOptions().toString());
    Iterator<Result> iterator = singletonIterator(() -> new Result(explanation));
    return new CypherResultSet(iterator);
}

Example 4 with GroovyPredicate

use of org.opencypher.gremlin.translation.groovy.GroovyPredicate in project cypher-for-gremlin by opencypher.

the class Translation method translateVerbose.

@Test
public void translateVerbose() throws Exception {
    // freshReadmeSnippet: verbose
    String cypher = "MATCH (p:Person) WHERE p.age > 25 RETURN p.name";
    CypherAstWrapper ast = CypherAstWrapper.parse(cypher);
    Translator<String, GroovyPredicate> translator = Translator.builder().gremlinGroovy().build();
    String gremlin = ast.buildTranslation(translator);
    // freshReadmeSnippet: verbose
    assertThat(gremlin).startsWith("g.V()");
}

Example 5 with GroovyPredicate

use of org.opencypher.gremlin.translation.groovy.GroovyPredicate in project cypher-for-gremlin by opencypher.

the class NoCustomFunctionsTest method functionsAndPredicates.

@Test
public void functionsAndPredicates() {
    String cypher = "MATCH (n:N) " + "WITH n.p AS s " + "WHERE s STARTS WITH 'x' " + "AND s ENDS WITH 'x' " + "AND s CONTAINS 'x' " + "RETURN length(s), toString(s)";
    CypherAstWrapper ast = CypherAstWrapper.parse(cypher);
    Translator<String, GroovyPredicate> translator = Translator.builder().gremlinGroovy().build(flavor);
    assertThatThrownBy(() -> ast.buildTranslation(translator)).hasMessageContaining("contains, convertToString, endsWith, length, starsWith");
}