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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.serialization.queryformats;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.thinkaurelius.titan.graphdb.tinkerpop.TitanIoRegistry;
import org.apache.tinkerpop.gremlin.structure.Direction;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONMapper;
import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class GraphSON implements FormatMapper {
private final GraphSONMapper mapper = GraphSONMapper.build().addRegistry(TitanIoRegistry.INSTANCE).create();
private final GraphSONWriter writer = GraphSONWriter.build().mapper(mapper).create();
protected JsonParser parser = new JsonParser();
@Override
public JsonObject formatObject(Object v) {
OutputStream os = new ByteArrayOutputStream();
String result = "";
try {
writer.writeVertex(os, (Vertex)v, Direction.BOTH);
result = os.toString();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return parser.parse(result).getAsJsonObject();
}
@Override
public int parallelThreshold() {
return 50;
}
}
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