| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| package org.apache.tinkerpop.gremlin.structure.io.binary.types; |
| |
| import org.apache.tinkerpop.gremlin.structure.io.binary.DataType; |
| import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryReader; |
| import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter; |
| import org.apache.tinkerpop.gremlin.structure.Edge; |
| import org.apache.tinkerpop.gremlin.structure.io.Buffer; |
| import org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceEdge; |
| import org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceVertex; |
| |
| import java.io.IOException; |
| |
| /** |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public class EdgeSerializer extends SimpleTypeSerializer<Edge> { |
| public EdgeSerializer() { |
| super(DataType.EDGE); |
| } |
| |
| @Override |
| protected Edge readValue(final Buffer buffer, final GraphBinaryReader context) throws IOException { |
| final Object id = context.read(buffer); |
| final String label = context.readValue(buffer, String.class, false); |
| |
| final ReferenceVertex inV = new ReferenceVertex(context.read(buffer), |
| context.readValue(buffer, String.class, false)); |
| final ReferenceVertex outV = new ReferenceVertex(context.read(buffer), |
| context.readValue(buffer, String.class, false)); |
| |
| // discard the parent vertex - we only send "references so this should always be null, but will we change our |
| // minds someday???? |
| context.read(buffer); |
| |
| // discard the properties - as we only send "references" this should always be null, but will we change our |
| // minds some day???? |
| context.read(buffer); |
| |
| return new ReferenceEdge(id, label, inV, outV); |
| } |
| |
| @Override |
| protected void writeValue(final Edge value, final Buffer buffer, final GraphBinaryWriter context) throws IOException { |
| |
| context.write(value.id(), buffer); |
| context.writeValue(value.label(), buffer, false); |
| |
| context.write(value.inVertex().id(), buffer); |
| context.writeValue(value.inVertex().label(), buffer, false); |
| context.write(value.outVertex().id(), buffer); |
| context.writeValue(value.outVertex().label(), buffer, false); |
| |
| // we don't serialize the parent Vertex for edges. they are "references", but we leave a place holder |
| // here as an option for the future as we've waffled this soooooooooo many times now |
| context.write(null, buffer); |
| // we don't serialize properties for graph vertices/edges. they are "references", but we leave a place holder |
| // here as an option for the future as we've waffled this soooooooooo many times now |
| context.write(null, buffer); |
| } |
| } |