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=========================================================
21 package org.onap.aai.serialization.queryformats;
23 import com.google.gson.JsonArray;
24 import com.google.gson.JsonElement;
25 import com.google.gson.JsonObject;
26 import com.google.gson.JsonParser;
28 import java.io.ByteArrayOutputStream;
29 import java.io.IOException;
30 import java.io.OutputStream;
31 import java.util.Iterator;
32 import java.util.List;
34 import java.util.Optional;
36 import org.apache.tinkerpop.gremlin.structure.Direction;
37 import org.apache.tinkerpop.gremlin.structure.Vertex;
38 import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONMapper;
39 import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter;
40 import org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry;
41 import org.onap.aai.serialization.queryformats.exceptions.AAIFormatQueryResultFormatNotSupported;
42 import org.onap.aai.serialization.queryformats.exceptions.AAIFormatVertexException;
43 import org.slf4j.Logger;
44 import org.slf4j.LoggerFactory;
46 public class GraphSON implements FormatMapper {
48 private static final Logger logger = LoggerFactory.getLogger(GraphSON.class);
50 private final GraphSONMapper mapper =
51 GraphSONMapper.build().addRegistry(JanusGraphIoRegistry.getInstance()).create();
52 private final GraphSONWriter writer = GraphSONWriter.build().mapper(mapper).create();
55 public Optional<JsonObject> formatObject(Object v) {
56 OutputStream os = new ByteArrayOutputStream();
59 writer.writeVertex(os, (Vertex) v, Direction.BOTH);
61 result = os.toString();
62 } catch (IOException e) {
63 logger.debug("GraphSON writeVertex error : {}", e.getMessage());
66 JsonObject jsonObject = JsonParser.parseString(result).getAsJsonObject();
68 if (jsonObject != null) {
70 if (jsonObject.has("outE")) {
71 JsonObject outEdges = jsonObject.get("outE").getAsJsonObject();
72 removePrivateEdges(jsonObject, outEdges, "outE");
75 if (jsonObject.has("inE")) {
76 JsonObject inEdges = jsonObject.get("inE").getAsJsonObject();
77 removePrivateEdges(jsonObject, inEdges, "inE");
82 return Optional.of(jsonObject);
87 public Optional<JsonObject> formatObject(Object obj, Map<String, List<String>> properties)
88 throws AAIFormatVertexException, AAIFormatQueryResultFormatNotSupported {
89 return Optional.empty();
93 * Removes the private edges from the json object
95 * Please note that the reason to choose to remove the private
96 * edges from the json object instead of removing it from the vertex
97 * itself is the fact that even though the transaction will be rolled back
98 * is because of the possible incosistent behavior where the actual edge
99 * might actually be removed in a long running transaction and is not worth the risk
101 * @param jsonObject - JSON Object from which we are removing the private edges for
102 * @param edges - JSONObject HashMap representing all of the edges
103 * @param edgeDirection - a string indicating the direction of the edge
105 private void removePrivateEdges(JsonObject jsonObject, JsonObject edges, String edgeDirection) {
107 Iterator it = edges.entrySet().iterator();
108 while (it.hasNext()) {
109 Map.Entry<String, JsonElement> outEntry = (Map.Entry<String, JsonElement>) it.next();
110 JsonArray edgePropertiesArray = outEntry.getValue().getAsJsonArray();
111 for (int index = 0; index < edgePropertiesArray.size(); ++index) {
112 JsonElement jsonElement = edgePropertiesArray.get(index);
113 JsonObject obj = jsonElement.getAsJsonObject();
114 if (obj.has("properties")) {
115 JsonObject objProperties = obj.get("properties").getAsJsonObject();
116 if (objProperties.has("private")) {
117 boolean isPrivate = objProperties.get("private").getAsBoolean();
119 if (edges.size() == 1) {
120 if (edgePropertiesArray.size() == 1) {
121 jsonObject.remove(edgeDirection);
123 edgePropertiesArray.remove(jsonElement);
126 edgePropertiesArray.remove(jsonElement);
132 if (edgePropertiesArray.size() == 0) {
139 public int parallelThreshold() {