| #region License |
| |
| /* |
| * 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. |
| */ |
| |
| #endregion |
| |
| using System.Collections.Generic; |
| using System.IO; |
| using System.Threading; |
| using System.Threading.Tasks; |
| |
| namespace Gremlin.Net.Structure.IO.GraphBinary.Types |
| { |
| /// <summary> |
| /// An <see cref="Edge"/> serializer. |
| /// </summary> |
| public class EdgeSerializer : SimpleTypeSerializer<Edge> |
| { |
| /// <summary> |
| /// Initializes a new instance of the <see cref="EdgeSerializer" /> class. |
| /// </summary> |
| public EdgeSerializer() : base(DataType.Edge) |
| { |
| } |
| |
| /// <inheritdoc /> |
| protected override async Task WriteValueAsync(Edge value, Stream stream, GraphBinaryWriter writer, |
| CancellationToken cancellationToken = default) |
| { |
| await writer.WriteAsync(value.Id, stream, cancellationToken).ConfigureAwait(false); |
| await writer.WriteNonNullableValueAsync(value.Label, stream, cancellationToken).ConfigureAwait(false); |
| |
| await writer.WriteAsync(value.InV.Id, stream, cancellationToken).ConfigureAwait(false); |
| await writer.WriteNonNullableValueAsync(value.InV.Label, stream, cancellationToken).ConfigureAwait(false); |
| await writer.WriteAsync(value.OutV.Id, stream, cancellationToken).ConfigureAwait(false); |
| await writer.WriteNonNullableValueAsync(value.OutV.Label, stream, cancellationToken).ConfigureAwait(false); |
| |
| // Placeholder for the parent vertex |
| await writer.WriteAsync(null, stream, cancellationToken).ConfigureAwait(false); |
| |
| // placeholder for the properties |
| await writer.WriteAsync(null, stream, cancellationToken).ConfigureAwait(false); |
| } |
| |
| /// <inheritdoc /> |
| protected override async Task<Edge> ReadValueAsync(Stream stream, GraphBinaryReader reader, |
| CancellationToken cancellationToken = default) |
| { |
| var id = await reader.ReadAsync(stream, cancellationToken).ConfigureAwait(false); |
| var label = (string)await reader.ReadNonNullableValueAsync<string>(stream, cancellationToken) |
| .ConfigureAwait(false); |
| |
| var inV = new Vertex(await reader.ReadAsync(stream, cancellationToken).ConfigureAwait(false), |
| (string)await reader.ReadNonNullableValueAsync<string>(stream, cancellationToken).ConfigureAwait(false)); |
| var outV = new Vertex(await reader.ReadAsync(stream, cancellationToken).ConfigureAwait(false), |
| (string)await reader.ReadNonNullableValueAsync<string>(stream, cancellationToken).ConfigureAwait(false)); |
| |
| // discard possible parent vertex |
| await reader.ReadAsync(stream, cancellationToken).ConfigureAwait(false); |
| |
| var properties = await reader.ReadAsync(stream, cancellationToken).ConfigureAwait(false); |
| var propertiesAsArray = (properties as List<object>)?.ToArray(); |
| |
| return new Edge(id, outV, label, inV, propertiesAsArray); |
| } |
| } |
| } |