Examples with GraphResultSet com.datastax.dse.driver.api.core.graph.GraphResultSet used on opensource projects

Example 1 with GraphResultSet

use of com.datastax.dse.driver.api.core.graph.GraphResultSet in project java-driver by datastax.

the class GraphTraversalITBase method should_return_zero_results_graphson_2.

/**
 * Ensures a traversal that yields no results is properly retrieved and is empty, using GraphSON2
 * and the TinkerPop transform results function.
 *
 * @test_category dse:graph
 */
@Test
public void should_return_zero_results_graphson_2() {
    Assumptions.assumeThat(isGraphBinary()).isFalse();
    GraphStatement simpleGraphStatement = ScriptGraphStatement.newInstance("g.V().hasLabel('notALabel')");
    GraphResultSet rs = session().execute(simpleGraphStatement);
    assertThat(rs.one()).isNull();
}

Example 2 with GraphResultSet

use of com.datastax.dse.driver.api.core.graph.GraphResultSet in project java-driver by datastax.

the class GraphTraversalITBase method should_deserialize_vertex_id_as_map.

/**
 * A sanity check that a returned {@link Vertex}'s id is a {@link Map}. This test could break in
 * the future if the format of a vertex ID changes from a Map to something else in DSE.
 *
 * @test_category dse:graph
 */
@Test
public void should_deserialize_vertex_id_as_map() {
    GraphResultSet resultSet = session().execute(newInstance(graphTraversalSource().V().hasLabel("person").has("name", "marko")));
    List<GraphNode> results = resultSet.all();
    assertThat(results.size()).isEqualTo(1);
    Vertex marko = results.get(0).asVertex();
    if (isGraphBinary()) {
        assertThat(((String) marko.id())).contains("marko");
        assertThat(marko.label()).isEqualTo("person");
    } else {
        assertThat(marko).hasProperty("name", "marko");
        @SuppressWarnings("unchecked") Map<String, String> id = (Map<String, String>) marko.id();
        assertThat(id).hasSize(3).containsEntry("~label", "person").containsKey("community_id").containsKey("member_id");
    }
}

Example 3 with GraphResultSet

use of com.datastax.dse.driver.api.core.graph.GraphResultSet in project java-driver by datastax.

the class GraphTraversalITBase method should_handle_lambdas.

/**
 * Validates that a traversal using lambda operations with anonymous traversals are applied
 * appropriately and return the expected results.
 *
 * <p>Traversal that filters 'person'-labeled vertices by name 'marko' and flatMaps outgoing
 * vertices on the 'knows' relationship by their outgoing 'created' vertices and then maps by
 * their 'name' property and folds them into one list.
 *
 * <p><b>Note:</b> This does not validate lambdas with functions as those can't be interpreted and
 * sent remotely.
 *
 * @test_category dse:graph
 */
@Test
public void should_handle_lambdas() {
    // Find all people marko knows and the software they created.
    GraphResultSet result = session().execute(newInstance(graphTraversalSource().V().hasLabel("person").filter(__.has("name", "marko")).out("knows").flatMap(__.out("created")).map(__.values("name")).fold()));
    // Marko only knows josh and vadas, of which josh created lop and ripple.
    List<String> software = result.one().as(GenericType.listOf(String.class));
    assertThat(software).containsOnly("lop", "ripple");
}

Example 4 with GraphResultSet

use of com.datastax.dse.driver.api.core.graph.GraphResultSet in project java-driver by datastax.

the class GraphTraversalITBase method should_parse_tree.

/**
 * Validates that a traversal returning a Tree structure is returned appropriately with the
 * expected contents.
 *
 * <p>Retrieves trees of people marko knows and the software they created.
 *
 * @test_category dse:graph
 */
@Test
public void should_parse_tree() {
    // Get a tree structure showing the paths from mark to people he knows to software they've
    // created.
    GraphResultSet rs = session().execute(newInstance(graphTraversalSource().V().hasLabel("person").out("knows").out("created").tree().by("name")));
    List<GraphNode> results = rs.all();
    assertThat(results.size()).isEqualTo(1);
    // [{key=marko, value=[{key=josh, value=[{key=ripple, value=[]}, {key=lop, value=[]}]}]}]
    GraphNode result = results.get(0);
    @SuppressWarnings("unchecked") Tree<String> tree = result.as(Tree.class);
    assertThat(tree).tree("marko").tree("josh").tree("lop").isLeaf();
    assertThat(tree).tree("marko").tree("josh").tree("ripple").isLeaf();
}

Example 5 with GraphResultSet

use of com.datastax.dse.driver.api.core.graph.GraphResultSet in project java-driver by datastax.

the class GraphTraversalITBase method should_handle_result_object_of_mixed_types.

/**
 * Ensures that a traversal that returns a result of mixed types is interpreted as a {@link Map}
 * with {@link Object} values. Also uses {@link
 * org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal#by(org.apache.tinkerpop.gremlin.process.traversal.Traversal)}
 * with an anonymous traversal to get inbound 'created' edges and folds them into a list.
 *
 * <p>Executes a vertex traversal that binds label 'a' and 'b' to vertex properties and label 'c'
 * to vertices that have edges from that vertex.
 *
 * @test_category dse:graph
 */
@Test
public void should_handle_result_object_of_mixed_types() {
    // find all software vertices and select name, language, and find all vertices that created such
    // software.
    GraphResultSet rs = session().execute(newInstance(graphTraversalSource().V().hasLabel("software").as("a", "b", "c").select("a", "b", "c").by("name").by("lang").by(__.in("created").fold())));
    List<GraphNode> results = rs.all();
    assertThat(results.size()).isEqualTo(2);
    // Ensure that we got 'lop' and 'ripple' for property a.
    assertThat(results).extracting(m -> m.getByKey("a").as(Object.class)).containsOnly("lop", "ripple");
    for (GraphNode result : results) {
        // The row should represent a map with a, b, and c keys.
        assertThat(ImmutableList.<Object>copyOf(result.keys())).containsOnlyOnce("a", "b", "c");
        // 'e' should not exist, thus it should be null.
        assertThat(result.getByKey("e")).isNull();
        // both software are written in java.
        assertThat(result.getByKey("b").isNull()).isFalse();
        assertThat(result.getByKey("b").asString()).isEqualTo("java");
        GraphNode c = result.getByKey("c");
        assertThat(c.isList()).isTrue();
        if (result.getByKey("a").asString().equals("lop")) {
            if (isGraphBinary()) {
                // should contain three vertices
                Assertions.assertThat(c.size()).isEqualTo(3);
            } else {
                // 'c' should contain marko, josh, peter.
                // Ensure we have three vertices.
                assertThat(c.size()).isEqualTo(3);
                List<Vertex> vertices = Lists.newArrayList(c.getByIndex(0).asVertex(), c.getByIndex(1).asVertex(), c.getByIndex(2).asVertex());
                assertThat(vertices).extracting(vertex -> vertex.property("name").value()).containsOnly("marko", "josh", "peter");
            }
        } else {
            if (isGraphBinary()) {
                // has only one label
                Assertions.assertThat(c.size()).isEqualTo(1);
            } else {
                // ripple, 'c' should contain josh.
                // Ensure we have 1 vertex.
                assertThat(c.size()).isEqualTo(1);
                Vertex vertex = c.getByIndex(0).asVertex();
                assertThat(vertex).hasProperty("name", "josh");
            }
        }
    }
}