Examples of com.tinkerpop.gremlin.structure.Vertex

com.tinkerpop.gremlin.structure.Vertex
driguez.com) @author Stephen Mallette (http://stephen.genoprime.com)

    }


    @Test
    public void serializeEdge() throws Exception {
        final Graph g = TinkerGraph.open();
        final Vertex v1 = g.addVertex();
        final Vertex v2 = g.addVertex();
        final Edge e = v1.addEdge("test", v2);
        e.property("abc", 123);


        final Iterable<Edge> iterable = g.E().toList();


        final ResponseMessage response = convert(iterable);
        assertCommon(response);


        final List<Map<String, Object>> edgeList = (List<Map<String, Object>>) response.getResult().getData();
        assertEquals(1, edgeList.size());


        final Map<String, Object> deserializedEdge = edgeList.get(0);
        assertEquals(e.id(), deserializedEdge.get(GraphSONTokens.ID));
        assertEquals(v1.id(), deserializedEdge.get(GraphSONTokens.OUT));
        assertEquals(v2.id(), deserializedEdge.get(GraphSONTokens.IN));
        assertEquals(v1.label(), deserializedEdge.get(GraphSONTokens.OUT_LABEL));
        assertEquals(v2.label(), deserializedEdge.get(GraphSONTokens.IN_LABEL));
        assertEquals(e.label(), deserializedEdge.get(GraphSONTokens.LABEL));
        assertEquals(GraphSONTokens.EDGE, deserializedEdge.get(GraphSONTokens.TYPE));


        final Map<String, Object> properties = (Map<String, Object>) deserializedEdge.get(GraphSONTokens.PROPERTIES);
        assertNotNull(properties);

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    }


    @Test
    public void serializeVertexWithEmbeddedMap() throws Exception {
        final Graph g = TinkerGraph.open();
        final Vertex v = g.addVertex();
        final Map<String, Object> map = new HashMap<>();
        map.put("x", 500);
        map.put("y", "some");


        final ArrayList<Object> friends = new ArrayList<>();
        friends.add("x");
        friends.add(5);
        friends.add(map);


        v.property("friends", friends);


        final List list = g.V().toList();


        final ResponseMessage response = convert(list);
        assertCommon(response);

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        printTraversalForm(traversal);
        int counter = 0;
        Set<Vertex> vertices = new HashSet<>();
        while (traversal.hasNext()) {
            counter++;
            Vertex vertex = traversal.next();
            vertices.add(vertex);
            assertTrue(vertex.value("name").equals("ripple") ||
                    vertex.value("name").equals("lop"));
        }
        assertEquals(2, counter);
        assertEquals(2, vertices.size());
    }

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        printTraversalForm(traversal);
        int counter = 0;
        Set<Vertex> vertices = new HashSet<>();
        while (traversal.hasNext()) {
            counter++;
            Vertex vertex = traversal.next();
            vertices.add(vertex);
            assertTrue(vertex.value("name").equals("marko") ||
                    vertex.value("name").equals("peter"));
        }
        assertEquals(counter, 2);
        assertEquals(vertices.size(), 2);
    }

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        final TinkerGraph g = TinkerGraph.open();
        g.createIndex("name", Vertex.class);


        g.addVertex("name", "marko", "age", 29);
        g.addVertex("name", "stephen", "age", 35);
        final Vertex v = g.addVertex("name", "stephen", "age", 35);


        // a tricky way to evaluate if indices are actually being used is to pass a fake BiPredicate to has()
        // to get into the Pipeline and evaluate what's going through it.  in this case, we know that at index
        // is used because only "stephen" ages should pass through the pipeline due to the inclusion of the
        // key index lookup on "name".  If there's an age of something other than 35 in the pipeline being evaluated
        // then something is wrong.
        assertEquals(2, StreamFactory.stream(g.V().has("age", (t, u) -> {
            assertEquals(35, t);
            return true;
        }, 35).has("name", "stephen")).count());


        v.remove();
        assertEquals(1, StreamFactory.stream(g.V().has("age", (t, u) -> {
            assertEquals(35, t);
            return true;
        }, 35).has("name", "stephen")).count());
    }

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    @Test
    public void shouldUpdateEdgeIndicesInNewGraph() {
        final TinkerGraph g = TinkerGraph.open();
        g.createIndex("oid", Edge.class);


        final Vertex v = g.addVertex();
        v.addEdge("friend", v, "oid", "1", "weight", 0.5f);
        v.addEdge("friend", v, "oid", "2", "weight", 0.6f);


        // a tricky way to evaluate if indices are actually being used is to pass a fake BiPredicate to has()
        // to get into the Pipeline and evaluate what's going through it.  in this case, we know that at index
        // is used because only oid 1 should pass through the pipeline due to the inclusion of the
        // key index lookup on "oid".  If there's an weight of something other than 0.5f in the pipeline being

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    @Test
    public void shouldRemoveEdgeFromAnIndex() {
        final TinkerGraph g = TinkerGraph.open();
        g.createIndex("oid", Edge.class);


        final Vertex v = g.addVertex();
        v.addEdge("friend", v, "oid", "1", "weight", 0.5f);
        final Edge e = v.addEdge("friend", v, "oid", "1", "weight", 0.5f);
        v.addEdge("friend", v, "oid", "2", "weight", 0.6f);


        // a tricky way to evaluate if indices are actually being used is to pass a fake BiPredicate to has()
        // to get into the Pipeline and evaluate what's going through it.  in this case, we know that at index
        // is used because only oid 1 should pass through the pipeline due to the inclusion of the
        // key index lookup on "oid".  If there's an weight of something other than 0.5f in the pipeline being

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    @Ignore
    @Test
    public void shouldUpdateEdgeIndicesInExistingGraph() {
        final TinkerGraph g = TinkerGraph.open();


        final Vertex v = g.addVertex();
        v.addEdge("friend", v, "oid", "1", "weight", 0.5f);
        v.addEdge("friend", v, "oid", "2", "weight", 0.6f);


        // a tricky way to evaluate if indices are actually being used is to pass a fake BiPredicate to has()
        // to get into the Pipeline and evaluate what's going through it.  in this case, we know that at index
        // is not used because "1" and "2" weights both pass through the pipeline.
        assertEquals(1, StreamFactory.stream(g.E().has("weight", (t, u) -> {

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            reader.readGraph(stream, g);
        }


        final Graph ng = TinkerGraph.open();
        g.V().sideEffect(ov -> {
            final Vertex v = ov.get();
            if (v.label().equals("song"))
                ng.addVertex(T.id, Integer.parseInt(v.id().toString()), T.label, "song", "name", v.value("name"), "performances", v.property("performances").orElse(0), "songType", v.property("songType").orElse(""));
            else if (v.label().equals("artist"))
                ng.addVertex(T.id, Integer.parseInt(v.id().toString()), T.label, "artist", "name", v.value("name"));
            else
                throw new RuntimeException("damn");
        }).iterate();


        g.E().sideEffect(oe -> {
            final Edge e = oe.get();
            final Vertex v2 = ng.v(Integer.parseInt(e.inV().next().id().toString()));
            final Vertex v1 = ng.v(Integer.parseInt(e.outV().next().id().toString()));


            if (e.label().equals("followedBy"))
                v1.addEdge("followedBy", v2, T.id, Integer.parseInt(e.id().toString()), "weight", e.value("weight"));
            else if (e.label().equals("sungBy"))
                v1.addEdge("sungBy", v2, T.id, Integer.parseInt(e.id().toString()));
            else if (e.label().equals("writtenBy"))
                v1.addEdge("writtenBy", v2, T.id, Integer.parseInt(e.id().toString()));
            else
                throw new RuntimeException("bah");


        }).iterate();

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        return this.baseVertex;
    }


    @Override
    public Edge addEdge(final String label, final Vertex inVertex, final Object... keyValues) {
        final Vertex baseInVertex = (inVertex instanceof StrategyWrappedVertex) ? ((StrategyWrappedVertex) inVertex).getBaseVertex() : inVertex;
        return new StrategyWrappedEdge(this.strategyWrappedGraph.getStrategy().compose(
                s -> s.getAddEdgeStrategy(strategyContext),
                this.baseVertex::addEdge)
                .apply(label, baseInVertex, keyValues), this.strategyWrappedGraph);
    }

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