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;
27 import java.io.ByteArrayOutputStream;
28 import java.io.IOException;
29 import java.io.OutputStream;
30 import java.util.Iterator;
31 import java.util.List;
33 import java.util.Optional;
34 import org.apache.tinkerpop.gremlin.structure.Direction;
35 import org.apache.tinkerpop.gremlin.structure.Vertex;
36 import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONMapper;
37 import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter;
38 import org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry;
39 import org.onap.aai.serialization.queryformats.exceptions.AAIFormatQueryResultFormatNotSupported;
40 import org.onap.aai.serialization.queryformats.exceptions.AAIFormatVertexException;
41 import org.slf4j.Logger;
42 import org.slf4j.LoggerFactory;
44 public class GraphSON implements FormatMapper {
46 private static final Logger logger = LoggerFactory.getLogger(GraphSON.class);
48 private final GraphSONMapper mapper =
49 GraphSONMapper.build().addRegistry(JanusGraphIoRegistry.getInstance()).create();
50 private final GraphSONWriter writer = GraphSONWriter.build().mapper(mapper).create();
51 protected JsonParser parser = new JsonParser();
54 public Optional<JsonObject> formatObject(Object v) {
55 OutputStream os = new ByteArrayOutputStream();
58 writer.writeVertex(os, (Vertex) v, Direction.BOTH);
60 result = os.toString();
61 } catch (IOException e) {
62 logger.debug("GraphSON writeVertex error : {}", e.getMessage());
65 JsonObject jsonObject = parser.parse(result).getAsJsonObject();
67 if (jsonObject != null) {
69 if (jsonObject.has("outE")) {
70 JsonObject outEdges = jsonObject.get("outE").getAsJsonObject();
71 removePrivateEdges(jsonObject, outEdges, "outE");
74 if (jsonObject.has("inE")) {
75 JsonObject inEdges = jsonObject.get("inE").getAsJsonObject();
76 removePrivateEdges(jsonObject, inEdges, "inE");
81 return Optional.of(jsonObject);
86 public Optional<JsonObject> formatObject(Object obj, Map<String, List<String>> properties)
87 throws AAIFormatVertexException, AAIFormatQueryResultFormatNotSupported {
88 return Optional.empty();
92 * Removes the private edges from the json object
94 * Please note that the reason to choose to remove the private
95 * edges from the json object instead of removing it from the vertex
96 * itself is the fact that even though the transaction will be rolled back
97 * is because of the possible incosistent behavior where the actual edge
98 * might actually be removed in a long running transaction and is not worth the risk
100 * @param jsonObject - JSON Object from which we are removing the private edges for
101 * @param edges - JSONObject HashMap representing all of the edges
102 * @param edgeDirection - a string indicating the direction of the edge
104 private void removePrivateEdges(JsonObject jsonObject, JsonObject edges, String edgeDirection) {
106 Iterator it = edges.entrySet().iterator();
107 while (it.hasNext()) {
108 Map.Entry<String, JsonElement> outEntry = (Map.Entry<String, JsonElement>) it.next();
109 JsonArray edgePropertiesArray = outEntry.getValue().getAsJsonArray();
110 for (int index = 0; index < edgePropertiesArray.size(); ++index) {
111 JsonElement jsonElement = edgePropertiesArray.get(index);
112 JsonObject obj = jsonElement.getAsJsonObject();
113 if (obj.has("properties")) {
114 JsonObject objProperties = obj.get("properties").getAsJsonObject();
115 if (objProperties.has("private")) {
116 boolean isPrivate = objProperties.get("private").getAsBoolean();
118 if (edges.size() == 1) {
119 if (edgePropertiesArray.size() == 1) {
120 jsonObject.remove(edgeDirection);
122 edgePropertiesArray.remove(jsonElement);
125 edgePropertiesArray.remove(jsonElement);
131 if (edgePropertiesArray.size() == 0) {
138 public int parallelThreshold() {