2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 package org.onap.aai.serialization.queryformats;
22 import com.google.gson.JsonObject;
23 import com.google.gson.JsonParser;
24 import com.thinkaurelius.titan.graphdb.tinkerpop.TitanIoRegistry;
25 import org.apache.tinkerpop.gremlin.structure.Direction;
26 import org.apache.tinkerpop.gremlin.structure.Vertex;
27 import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONMapper;
28 import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter;
30 import java.io.ByteArrayOutputStream;
31 import java.io.IOException;
32 import java.io.OutputStream;
34 public class GraphSON implements FormatMapper {
36 private final GraphSONMapper mapper = GraphSONMapper.build().addRegistry(TitanIoRegistry.INSTANCE).create();
37 private final GraphSONWriter writer = GraphSONWriter.build().mapper(mapper).create();
38 protected JsonParser parser = new JsonParser();
41 public JsonObject formatObject(Object v) {
42 OutputStream os = new ByteArrayOutputStream();
45 writer.writeVertex(os, (Vertex)v, Direction.BOTH);
47 result = os.toString();
48 } catch (IOException e) {
49 // TODO Auto-generated catch block
53 return parser.parse(result).getAsJsonObject();
58 public int parallelThreshold() {