| #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; |
| using System.Collections.Generic; |
| using System.IO; |
| using System.Threading; |
| using System.Threading.Tasks; |
| using Gremlin.Net.Driver.Messages; |
| |
| namespace Gremlin.Net.Structure.IO.GraphBinary |
| { |
| /// <summary> |
| /// Allows to deserialize a <see cref="ResponseMessage{T}"/>. |
| /// </summary> |
| public class ResponseMessageSerializer |
| { |
| /// <summary> |
| /// Reads a response message from the stream. |
| /// </summary> |
| /// <param name="stream">The GraphBinary data to parse.</param> |
| /// <param name="reader">A <see cref="GraphBinaryReader"/> that can be used to read nested values.</param> |
| /// <param name="cancellationToken">The token to cancel the operation. The default value is None.</param> |
| /// <returns>The read response message.</returns> |
| public async Task<ResponseMessage<List<object>>> ReadValueAsync(MemoryStream stream, GraphBinaryReader reader, |
| CancellationToken cancellationToken = default) |
| { |
| var version = await stream.ReadByteAsync(cancellationToken).ConfigureAwait(false) & 0xff; |
| |
| if (version >> 7 != 1) |
| { |
| // This is an indication that the response stream was incorrectly built |
| // Or the stream offsets are wrong |
| throw new IOException("The most significant bit should be set according to the format"); |
| } |
| |
| var requestId = |
| (Guid?)await reader.ReadNullableValueAsync<Guid>(stream, cancellationToken).ConfigureAwait(false); |
| var code = (ResponseStatusCode)await reader.ReadNonNullableValueAsync<int>(stream, cancellationToken) |
| .ConfigureAwait(false); |
| var message = (string?)await reader.ReadNullableValueAsync<string>(stream, cancellationToken) |
| .ConfigureAwait(false); |
| var dictObj = await reader |
| .ReadNonNullableValueAsync<Dictionary<string, object>>(stream, cancellationToken).ConfigureAwait(false); |
| var attributes = (Dictionary<string, object>)dictObj; |
| |
| var status = new ResponseStatus(code, attributes, message); |
| |
| var meta = (Dictionary<string, object>)await reader |
| .ReadNonNullableValueAsync<Dictionary<string, object>>(stream, cancellationToken).ConfigureAwait(false); |
| var data = (List<object>?)await reader.ReadAsync(stream, cancellationToken).ConfigureAwait(false); |
| var result = new ResponseResult<List<object>>(data, meta); |
| |
| return new ResponseMessage<List<object>>(requestId, status, result); |
| } |
| } |
| } |