Java Code Examples for org.apache.tinkerpop.gremlin.structure.util.empty.EmptyGraph#instance()

The following examples show how to use org.apache.tinkerpop.gremlin.structure.util.empty.EmptyGraph#instance() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: EventStrategyTest.java From tinkerpop with Apache License 2.0

6 votes

@Test
public void shouldEventOnMutatingSteps() {
    final MutationListener listener1 = new ConsoleMutationListener(EmptyGraph.instance());
    final EventStrategy eventStrategy = EventStrategy.build()
            .addListener(listener1).create();

    eventStrategy.apply(traversal.asAdmin());

    final AtomicInteger mutatingStepsFound = new AtomicInteger(0);
    traversal.asAdmin().getSteps().stream()
            .filter(s -> s instanceof Mutating)
            .forEach(s -> {
                final Mutating mutating = (Mutating) s;
                assertEquals(1, mutating.getMutatingCallbackRegistry().getCallbacks().size());
                mutatingStepsFound.incrementAndGet();
            });

    assertEquals(expectedMutatingStepsFound, mutatingStepsFound.get());
}

Example 2

Source File: GremlinEnabledScriptEngineTest.java From tinkerpop with Apache License 2.0

6 votes

@Test(expected = IllegalArgumentException.class)
public void shouldNotAllowBytecodeEvalWithAliasInBindings() throws Exception {
    final GremlinScriptEngine scriptEngine = manager.getEngineByName(ENGINE_TO_TEST);
    final Graph graph = EmptyGraph.instance();
    final GraphTraversalSource g = graph.traversal();

    // purposefully use "x" to match the name of the traversal source binding for "x" below and
    // thus tests the alias added for "x"
    final GraphTraversal t = getTraversalWithLambda(g);

    final Bindings bindings = new SimpleBindings();
    bindings.put("x", g);
    bindings.put(GremlinScriptEngine.HIDDEN_G, g);

    scriptEngine.eval(t.asAdmin().getBytecode(), bindings, "x");
}

Example 3

Source File: GremlinEnabledScriptEngineTest.java From tinkerpop with Apache License 2.0

6 votes

@Test(expected = IllegalArgumentException.class)
public void shouldNotAllowBytecodeEvalWithInvalidBinding() throws Exception {
    final GremlinScriptEngine scriptEngine = manager.getEngineByName(ENGINE_TO_TEST);
    final Graph graph = EmptyGraph.instance();
    final GraphTraversalSource g = graph.traversal();

    // purposefully use "x" to match the name of the traversal source binding for "x" below and
    // thus tests the alias added for "x"
    final GraphTraversal t = getTraversalWithLambda(g);

    final Bindings bindings = new SimpleBindings();
    bindings.put("z", g);
    bindings.put("x", "invalid-binding-for-x-given-x-should-be-traversal-source");

    scriptEngine.eval(t.asAdmin().getBytecode(), bindings, "x");
}

Example 4

Source File: GremlinEnabledScriptEngineTest.java From tinkerpop with Apache License 2.0

6 votes

@Test
public void shouldEvalBytecode() throws Exception {
    final GremlinScriptEngine scriptEngine = manager.getEngineByName(ENGINE_TO_TEST);
    final Graph graph = EmptyGraph.instance();
    final GraphTraversalSource g = graph.traversal();

    // purposefully use "x" to match the name of the traversal source binding for "x" below and
    // thus tests the alias added for "x"
    final GraphTraversal t = getTraversalWithLambda(g);

    final Bindings bindings = new SimpleBindings();
    bindings.put("x", g);

    final Traversal evald = scriptEngine.eval(t.asAdmin().getBytecode(), bindings, "x");

    assertTraversals(t, evald);

    assertThat(manager.getBindings().containsKey(GremlinScriptEngine.HIDDEN_G), is(false));
}

Example 5

Source File: GremlinEnabledScriptEngineTest.java From tinkerpop with Apache License 2.0

5 votes

@Test(expected = IllegalArgumentException.class)
public void shouldNotAllowBytecodeEvalWithMissingBinding() throws Exception {
    final GremlinScriptEngine scriptEngine = manager.getEngineByName(ENGINE_TO_TEST);
    final Graph graph = EmptyGraph.instance();
    final GraphTraversalSource g = graph.traversal();

    // purposefully use "x" to match the name of the traversal source binding for "x" below and
    // thus tests the alias added for "x"
    final GraphTraversal t = getTraversalWithLambda(g);

    final Bindings bindings = new SimpleBindings();
    bindings.put("z", g);

    scriptEngine.eval(t.asAdmin().getBytecode(), bindings, "x");
}

Example 6