| /* |
| * 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.commons.collections.IteratorUtils; |
| import org.apache.tinkerpop.gremlin.structure.Edge; |
| import org.apache.tinkerpop.gremlin.structure.Property; |
| import org.apache.tinkerpop.gremlin.structure.io.Buffer; |
| 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.util.detached.DetachedEdge; |
| import org.apache.tinkerpop.gremlin.structure.util.detached.DetachedVertex; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| /** |
| * @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 Object inVId = context.read(buffer); |
| final String inVLabel = context.readValue(buffer, String.class, false); |
| final Object outVId = context.read(buffer); |
| final String outVLabel = context.readValue(buffer, String.class, false); |
| |
| // discard the parent vertex |
| context.read(buffer); |
| |
| final List<Property> properties = context.read(buffer); |
| |
| final DetachedVertex inV = DetachedVertex.build().setId(inVId).setLabel(inVLabel).create(); |
| final DetachedVertex outV = DetachedVertex.build().setId(outVId).setLabel(outVLabel).create(); |
| |
| final DetachedEdge.Builder builder = DetachedEdge.build().setId(id).setLabel(label).setInV(inV).setOutV(outV); |
| |
| if (properties != null) { |
| for (final Property p : properties) { |
| builder.addProperty(p); |
| } |
| } |
| |
| return builder.create(); |
| } |
| |
| @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. |
| context.write(null, buffer); |
| if (value.properties() == null) { |
| context.write(null, buffer); |
| } |
| else { |
| final List<?> asList = IteratorUtils.toList(value.properties()); |
| context.write(asList, buffer); |
| } |
| } |
| } |