| | | 1 | | // Copyright (c) Microsoft Corporation. All rights reserved. |
| | | 2 | | // Licensed under the MIT License. |
| | | 3 | | |
| | | 4 | | using System; |
| | | 5 | | using System.Collections.Generic; |
| | | 6 | | using System.IO; |
| | | 7 | | using System.Text; |
| | | 8 | | using System.Text.Json; |
| | | 9 | | using System.Threading; |
| | | 10 | | using System.Threading.Tasks; |
| | | 11 | | |
| | | 12 | | #pragma warning disable SA1402 // File may only contain a single type |
| | | 13 | | |
| | | 14 | | namespace Azure.Storage.Internal.Avro |
| | | 15 | | { |
| | | 16 | | internal static class AvroParser |
| | | 17 | | { |
| | | 18 | | /// <summary> |
| | | 19 | | /// Reads a fixed number of bytes from the stream. |
| | | 20 | | /// The number of bytes to return is the first int read from the stream. |
| | | 21 | | /// </summary> |
| | | 22 | | /// <remarks> |
| | | 23 | | /// Note that in the Avro spec, byte array length is specified as a long. |
| | | 24 | | /// This is fine for Quick Query and Change Feed, but could become a problem |
| | | 25 | | /// in the future. |
| | | 26 | | /// </remarks> |
| | | 27 | | public static async Task<byte[]> ReadFixedBytesAsync( |
| | | 28 | | Stream stream, |
| | | 29 | | int length, |
| | | 30 | | bool async, |
| | | 31 | | CancellationToken cancellationToken) |
| | | 32 | | { |
| | | 33 | | byte[] data = new byte[length]; |
| | | 34 | | int start = 0; |
| | | 35 | | while (length > 0) |
| | | 36 | | { |
| | | 37 | | int n = async ? |
| | | 38 | | await stream.ReadAsync(data, start, length, cancellationToken).ConfigureAwait(false) : |
| | | 39 | | stream.Read(data, start, length); |
| | | 40 | | start += n; |
| | | 41 | | length -= n; |
| | | 42 | | |
| | | 43 | | // We hit the end of the stream |
| | | 44 | | if (n <= 0) |
| | | 45 | | return data; |
| | | 46 | | } |
| | | 47 | | return data; |
| | | 48 | | } |
| | | 49 | | |
| | | 50 | | /// <summary> |
| | | 51 | | /// Reads a single byte from the stream. |
| | | 52 | | /// </summary> |
| | | 53 | | private static async Task<byte> ReadByteAsync( |
| | | 54 | | Stream stream, |
| | | 55 | | bool async, |
| | | 56 | | CancellationToken cancellationToken) |
| | | 57 | | { |
| | | 58 | | byte[] bytes = await ReadFixedBytesAsync(stream, 1, async, cancellationToken).ConfigureAwait(false); |
| | | 59 | | return bytes[0]; |
| | | 60 | | } |
| | | 61 | | |
| | | 62 | | /// <summary> |
| | | 63 | | /// Internal implementation of ReadLongAsync(). |
| | | 64 | | /// </summary> |
| | | 65 | | private static async Task<long> ReadZigZagLongAsync( |
| | | 66 | | Stream stream, |
| | | 67 | | bool async, |
| | | 68 | | CancellationToken cancellationToken) |
| | | 69 | | { |
| | | 70 | | byte b = await ReadByteAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 71 | | ulong next = b & 0x7FUL; |
| | | 72 | | int shift = 7; |
| | | 73 | | while ((b & 0x80) != 0) |
| | | 74 | | { |
| | | 75 | | b = await ReadByteAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 76 | | next |= (b & 0x7FUL) << shift; |
| | | 77 | | shift += 7; |
| | | 78 | | } |
| | | 79 | | long value = (long)next; |
| | | 80 | | return (-(value & 0x01L)) ^ ((value >> 1) & 0x7fffffffffffffffL); |
| | | 81 | | } |
| | | 82 | | |
| | | 83 | | /// <summary> |
| | | 84 | | /// Returns null. |
| | | 85 | | /// </summary> |
| | | 86 | | public static Task<object> ReadNullAsync() => Task.FromResult<object>(null); |
| | | 87 | | |
| | | 88 | | /// <summary> |
| | | 89 | | /// Reads a bool from the stream. |
| | | 90 | | /// </summary> |
| | | 91 | | public static async Task<bool> ReadBoolAsync( |
| | | 92 | | Stream stream, |
| | | 93 | | bool async, |
| | | 94 | | CancellationToken cancellationToken) |
| | | 95 | | { |
| | | 96 | | byte b = await ReadByteAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 97 | | |
| | | 98 | | if (b != 0) |
| | | 99 | | return true; |
| | | 100 | | return false; |
| | | 101 | | } |
| | | 102 | | |
| | | 103 | | /// <summary> |
| | | 104 | | /// Reads a long from the stream. |
| | | 105 | | /// </summary> |
| | | 106 | | public static async Task<long> ReadLongAsync( |
| | | 107 | | Stream stream, |
| | | 108 | | bool async, |
| | | 109 | | CancellationToken cancellationToken) => |
| | | 110 | | await ReadZigZagLongAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 111 | | |
| | | 112 | | /// <summary> |
| | | 113 | | /// Reads an int from the stream. |
| | | 114 | | /// </summary> |
| | | 115 | | public static async Task<int> ReadIntAsync( |
| | | 116 | | Stream stream, |
| | | 117 | | bool async, |
| | | 118 | | CancellationToken cancellationToken) => |
| | | 119 | | (int)(await ReadLongAsync(stream, async, cancellationToken).ConfigureAwait(false)); |
| | | 120 | | |
| | | 121 | | /// <summary> |
| | | 122 | | /// Reads a float from the stream. |
| | | 123 | | /// </summary> |
| | | 124 | | public static async Task<float> ReadFloatAsync( |
| | | 125 | | Stream stream, |
| | | 126 | | bool async, |
| | | 127 | | CancellationToken cancellationToken) |
| | | 128 | | { |
| | | 129 | | byte[] bytes = await ReadFixedBytesAsync(stream, 4, async, cancellationToken).ConfigureAwait(false); |
| | | 130 | | return BitConverter.ToSingle(bytes, 0); |
| | | 131 | | } |
| | | 132 | | |
| | | 133 | | /// <summary> |
| | | 134 | | /// Reads a double from the stream. |
| | | 135 | | /// </summary> |
| | | 136 | | public static async Task<double> ReadDoubleAsync( |
| | | 137 | | Stream stream, |
| | | 138 | | bool async, |
| | | 139 | | CancellationToken cancellationToken) |
| | | 140 | | { |
| | | 141 | | byte[] bytes = await ReadFixedBytesAsync(stream, 8, async, cancellationToken).ConfigureAwait(false); |
| | | 142 | | return BitConverter.ToDouble(bytes, 0); |
| | | 143 | | } |
| | | 144 | | |
| | | 145 | | /// <summary> |
| | | 146 | | /// Reads a fixed number of bytes from the stream. |
| | | 147 | | /// </summary> |
| | | 148 | | public static async Task<byte[]> ReadBytesAsync( |
| | | 149 | | Stream stream, |
| | | 150 | | bool async, |
| | | 151 | | CancellationToken cancellationToken) |
| | | 152 | | { |
| | | 153 | | // Note that byte array length is actually defined as a long in the Avro spec. |
| | | 154 | | // This is fine for now, but may need to be changed in the future. |
| | | 155 | | int size = await ReadIntAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 156 | | return await ReadFixedBytesAsync(stream, size, async, cancellationToken).ConfigureAwait(false); |
| | | 157 | | } |
| | | 158 | | |
| | | 159 | | /// <summary> |
| | | 160 | | /// Reads a string from the stream. |
| | | 161 | | /// </summary> |
| | | 162 | | public static async Task<string> ReadStringAsync( |
| | | 163 | | Stream stream, |
| | | 164 | | bool async, |
| | | 165 | | CancellationToken cancellationToken) |
| | | 166 | | { |
| | | 167 | | byte[] bytes = await ReadBytesAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 168 | | return Encoding.UTF8.GetString(bytes); |
| | | 169 | | } |
| | | 170 | | |
| | | 171 | | /// <summary> |
| | | 172 | | /// Reads a KeyValuePair from the stream. |
| | | 173 | | /// Used in ReadMapAsync(). |
| | | 174 | | /// </summary> |
| | | 175 | | private static async Task<KeyValuePair<string, T>> ReadMapPairAsync<T>( |
| | | 176 | | Stream stream, |
| | | 177 | | Func<Stream, bool, CancellationToken, Task<T>> parseItemAsync, |
| | | 178 | | bool async, |
| | | 179 | | CancellationToken cancellationToken) |
| | | 180 | | { |
| | | 181 | | string key = await ReadStringAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 182 | | #pragma warning disable AZC0110 // DO NOT use await keyword in possibly synchronous scope. |
| | | 183 | | T value = await parseItemAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 184 | | #pragma warning restore AZC0110 // DO NOT use await keyword in possibly synchronous scope. |
| | | 185 | | return new KeyValuePair<string, T>(key, value); |
| | | 186 | | } |
| | | 187 | | |
| | | 188 | | /// <summary> |
| | | 189 | | /// Reads a map from the stream. |
| | | 190 | | /// </summary> |
| | | 191 | | public static async Task<Dictionary<string, T>> ReadMapAsync<T>( |
| | | 192 | | Stream stream, |
| | | 193 | | Func<Stream, bool, CancellationToken, Task<T>> parseItemAsync, |
| | | 194 | | bool async, |
| | | 195 | | CancellationToken cancellationToken) |
| | | 196 | | { |
| | | 197 | | Func<Stream, bool, CancellationToken, Task<KeyValuePair<string, T>>> parsePair = |
| | | 198 | | async (s, async, cancellationToken) => await ReadMapPairAsync(s, parseItemAsync, async, cancellationToke |
| | | 199 | | IEnumerable<KeyValuePair<string, T>> entries = |
| | | 200 | | await ReadArrayAsync(stream, parsePair, async, cancellationToken).ConfigureAwait(false); |
| | | 201 | | return entries.ToDictionary(); |
| | | 202 | | } |
| | | 203 | | |
| | | 204 | | /// <summary> |
| | | 205 | | /// Reads an array of objects from the stream. |
| | | 206 | | /// </summary> |
| | | 207 | | private static async Task<IEnumerable<T>> ReadArrayAsync<T>( |
| | | 208 | | Stream stream, |
| | | 209 | | Func<Stream, bool, CancellationToken, Task<T>> parseItemAsync, |
| | | 210 | | bool async, |
| | | 211 | | CancellationToken cancellationToken) |
| | | 212 | | { |
| | | 213 | | // TODO: This is unpleasant, but I don't want to switch everything to IAsyncEnumerable for every array |
| | | 214 | | List<T> items = new List<T>(); |
| | | 215 | | for (long length = await ReadLongAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 216 | | length != 0; |
| | | 217 | | length = await ReadLongAsync(stream, async, cancellationToken).ConfigureAwait(false)) |
| | | 218 | | { |
| | | 219 | | // Ignore block sizes because we're not skipping anything |
| | | 220 | | if (length < 0) |
| | | 221 | | { |
| | | 222 | | await ReadLongAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 223 | | length = -length; |
| | | 224 | | } |
| | | 225 | | while (length-- > 0) |
| | | 226 | | { |
| | | 227 | | #pragma warning disable AZC0110 // DO NOT use await keyword in possibly synchronous scope. |
| | | 228 | | T item = await parseItemAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 229 | | #pragma warning restore AZC0110 // DO NOT use await keyword in possibly synchronous scope. |
| | | 230 | | items.Add(item); |
| | | 231 | | }; |
| | | 232 | | } |
| | | 233 | | return items; |
| | | 234 | | } |
| | | 235 | | |
| | | 236 | | /// <summary> |
| | | 237 | | /// Adds the select to each element in the array. |
| | | 238 | | /// </summary> |
| | | 239 | | internal static List<T> Map<T>(this JsonElement array, Func<JsonElement, T> selector) |
| | | 240 | | { |
| | | 241 | | var values = new List<T>(); |
| | | 242 | | foreach (JsonElement element in array.EnumerateArray()) |
| | | 243 | | { |
| | | 244 | | values.Add(selector(element)); |
| | | 245 | | } |
| | | 246 | | return values; |
| | | 247 | | } |
| | | 248 | | |
| | | 249 | | /// <summary> |
| | | 250 | | /// Converts an IEnumerable of KeyValuePair into a Dictionary. |
| | | 251 | | /// </summary> |
| | | 252 | | internal static Dictionary<string, T> ToDictionary<T>(this IEnumerable<KeyValuePair<string, T>> values) |
| | | 253 | | { |
| | | 254 | | Dictionary<string, T> dict = new Dictionary<string, T>(); |
| | | 255 | | foreach (KeyValuePair<string, T> pair in values) |
| | | 256 | | { |
| | | 257 | | dict[pair.Key] = pair.Value; |
| | | 258 | | } |
| | | 259 | | return dict; |
| | | 260 | | } |
| | | 261 | | } |
| | | 262 | | |
| | | 263 | | /// <summary> |
| | | 264 | | /// Parent class of AvroTypes. |
| | | 265 | | /// </summary> |
| | | 266 | | internal abstract class AvroType |
| | | 267 | | { |
| | | 268 | | /// <summary> |
| | | 269 | | /// Reads an object from the stream. |
| | | 270 | | /// </summary> |
| | | 271 | | public abstract Task<object> ReadAsync( |
| | | 272 | | Stream stream, |
| | | 273 | | bool async, |
| | | 274 | | CancellationToken cancellationToken); |
| | | 275 | | |
| | | 276 | | /// <summary> |
| | | 277 | | /// Determinds the AvroType from the Avro Schema. |
| | | 278 | | /// </summary> |
| | | 279 | | public static AvroType FromSchema(JsonElement schema) |
| | | 280 | | { |
| | | 281 | | return schema.ValueKind switch |
| | | 282 | | { |
| | | 283 | | // Primitives |
| | | 284 | | JsonValueKind.String => FromStringSchema(schema), |
| | | 285 | | // Union types |
| | | 286 | | JsonValueKind.Array => FromArraySchema(schema), |
| | | 287 | | // Everything else |
| | | 288 | | JsonValueKind.Object => FromObjectSchema(schema), |
| | | 289 | | _ => throw new InvalidOperationException($"Unexpected JSON Element: {schema}"), |
| | | 290 | | }; |
| | | 291 | | } |
| | | 292 | | |
| | | 293 | | private static AvroType FromStringSchema(JsonElement schema) |
| | | 294 | | { |
| | | 295 | | string type = schema.GetString(); |
| | | 296 | | return type switch |
| | | 297 | | { |
| | | 298 | | AvroConstants.Null => new AvroPrimitiveType { Primitive = AvroPrimitive.Null }, |
| | | 299 | | AvroConstants.Boolean => new AvroPrimitiveType { Primitive = AvroPrimitive.Boolean }, |
| | | 300 | | AvroConstants.Int => new AvroPrimitiveType { Primitive = AvroPrimitive.Int }, |
| | | 301 | | AvroConstants.Long => new AvroPrimitiveType { Primitive = AvroPrimitive.Long }, |
| | | 302 | | AvroConstants.Float => new AvroPrimitiveType { Primitive = AvroPrimitive.Float }, |
| | | 303 | | AvroConstants.Double => new AvroPrimitiveType { Primitive = AvroPrimitive.Double }, |
| | | 304 | | AvroConstants.Bytes => new AvroPrimitiveType { Primitive = AvroPrimitive.Bytes }, |
| | | 305 | | AvroConstants.String => new AvroPrimitiveType { Primitive = AvroPrimitive.String }, |
| | | 306 | | _ => throw new InvalidOperationException($"Unexpected Avro type {type} in {schema}"), |
| | | 307 | | }; |
| | | 308 | | } |
| | | 309 | | |
| | | 310 | | private static AvroType FromArraySchema(JsonElement schema) |
| | | 311 | | { |
| | | 312 | | return new AvroUnionType { Types = schema.Map(FromSchema) }; |
| | | 313 | | } |
| | | 314 | | |
| | | 315 | | private static AvroType FromObjectSchema(JsonElement schema) |
| | | 316 | | { |
| | | 317 | | string type = schema.GetProperty("type").GetString(); |
| | | 318 | | switch (type) |
| | | 319 | | { |
| | | 320 | | // Primitives can be defined as strings or objects |
| | | 321 | | case AvroConstants.Null: |
| | | 322 | | return new AvroPrimitiveType { Primitive = AvroPrimitive.Null }; |
| | | 323 | | case AvroConstants.Boolean: |
| | | 324 | | return new AvroPrimitiveType { Primitive = AvroPrimitive.Boolean }; |
| | | 325 | | case AvroConstants.Int: |
| | | 326 | | return new AvroPrimitiveType { Primitive = AvroPrimitive.Int }; |
| | | 327 | | case AvroConstants.Long: |
| | | 328 | | return new AvroPrimitiveType { Primitive = AvroPrimitive.Long }; |
| | | 329 | | case AvroConstants.Float: |
| | | 330 | | return new AvroPrimitiveType { Primitive = AvroPrimitive.Float }; |
| | | 331 | | case AvroConstants.Double: |
| | | 332 | | return new AvroPrimitiveType { Primitive = AvroPrimitive.Double }; |
| | | 333 | | case AvroConstants.Bytes: |
| | | 334 | | return new AvroPrimitiveType { Primitive = AvroPrimitive.Bytes }; |
| | | 335 | | case AvroConstants.String: |
| | | 336 | | return new AvroPrimitiveType { Primitive = AvroPrimitive.String }; |
| | | 337 | | case AvroConstants.Record: |
| | | 338 | | if (schema.TryGetProperty(AvroConstants.Aliases, out var _)) |
| | | 339 | | throw new InvalidOperationException($"Unexpected aliases on {schema}"); |
| | | 340 | | string name = schema.GetProperty(AvroConstants.Name).GetString(); |
| | | 341 | | Dictionary<string, AvroType> fields = new Dictionary<string, AvroType>(); |
| | | 342 | | foreach (JsonElement field in schema.GetProperty(AvroConstants.Fields).EnumerateArray()) |
| | | 343 | | { |
| | | 344 | | fields[field.GetProperty(AvroConstants.Name).GetString()] = FromSchema(field.GetProperty(AvroCon |
| | | 345 | | } |
| | | 346 | | return new AvroRecordType { Schema = name, Fields = fields }; |
| | | 347 | | case AvroConstants.Enum: |
| | | 348 | | if (schema.TryGetProperty(AvroConstants.Aliases, out var _)) |
| | | 349 | | throw new InvalidOperationException($"Unexpected aliases on {schema}"); |
| | | 350 | | return new AvroEnumType { Symbols = schema.GetProperty(AvroConstants.Symbols).Map(s => s.GetString() |
| | | 351 | | case AvroConstants.Map: |
| | | 352 | | return new AvroMapType { ItemType = FromSchema(schema.GetProperty(AvroConstants.Values)) }; |
| | | 353 | | case AvroConstants.Array: // Unused today |
| | | 354 | | case AvroConstants.Union: // Unused today |
| | | 355 | | case AvroConstants.Fixed: // Unused today |
| | | 356 | | default: |
| | | 357 | | throw new InvalidOperationException($"Unexpected Avro type {type} in {schema}"); |
| | | 358 | | } |
| | | 359 | | } |
| | | 360 | | } |
| | | 361 | | |
| | | 362 | | internal enum AvroPrimitive { Null, Boolean, Int, Long, Float, Double, Bytes, String }; |
| | | 363 | | |
| | | 364 | | /// <summary> |
| | | 365 | | /// AvroPrimativeType. |
| | | 366 | | /// </summary> |
| | | 367 | | internal class AvroPrimitiveType : AvroType |
| | | 368 | | { |
| | | 369 | | public AvroPrimitive Primitive { get; set; } |
| | | 370 | | |
| | | 371 | | public override async Task<object> ReadAsync( |
| | | 372 | | Stream stream, |
| | | 373 | | bool async, |
| | | 374 | | CancellationToken cancellationToken) => |
| | | 375 | | Primitive switch |
| | | 376 | | { |
| | | 377 | | #pragma warning disable AZC0110 // DO NOT use await keyword in possibly synchronous scope. |
| | | 378 | | AvroPrimitive.Null => await AvroParser.ReadNullAsync().ConfigureAwait(false), |
| | | 379 | | #pragma warning restore AZC0110 // DO NOT use await keyword in possibly synchronous scope. |
| | | 380 | | AvroPrimitive.Boolean => await AvroParser.ReadBoolAsync(stream, async, cancellationToken).ConfigureAwait |
| | | 381 | | AvroPrimitive.Int => await AvroParser.ReadIntAsync(stream, async, cancellationToken).ConfigureAwait(fals |
| | | 382 | | AvroPrimitive.Long => await AvroParser.ReadLongAsync(stream, async, cancellationToken).ConfigureAwait(fa |
| | | 383 | | AvroPrimitive.Float => await AvroParser.ReadFloatAsync(stream, async, cancellationToken).ConfigureAwait( |
| | | 384 | | AvroPrimitive.Double => await AvroParser.ReadDoubleAsync(stream, async, cancellationToken).ConfigureAwai |
| | | 385 | | AvroPrimitive.Bytes => await AvroParser.ReadBytesAsync(stream, async, cancellationToken).ConfigureAwait( |
| | | 386 | | AvroPrimitive.String => await AvroParser.ReadStringAsync(stream, async, cancellationToken).ConfigureAwai |
| | | 387 | | _ => throw new InvalidOperationException("Unknown Avro Primitive!") |
| | | 388 | | }; |
| | | 389 | | } |
| | | 390 | | |
| | | 391 | | /// <summary> |
| | | 392 | | /// AvroEnumType. |
| | | 393 | | /// </summary> |
| | | 394 | | internal class AvroEnumType : AvroType |
| | | 395 | | { |
| | 0 | 396 | | public IReadOnlyList<string> Symbols { get; set; } |
| | | 397 | | |
| | | 398 | | public override async Task<object> ReadAsync( |
| | | 399 | | Stream stream, |
| | | 400 | | bool async, |
| | | 401 | | CancellationToken cancellationToken) |
| | | 402 | | { |
| | 0 | 403 | | int value = await AvroParser.ReadIntAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | 0 | 404 | | return Symbols[value]; |
| | 0 | 405 | | } |
| | | 406 | | } |
| | | 407 | | |
| | | 408 | | /// <summary> |
| | | 409 | | /// AvroUnionType. |
| | | 410 | | /// </summary> |
| | | 411 | | internal class AvroUnionType : AvroType |
| | | 412 | | { |
| | | 413 | | public IReadOnlyList<AvroType> Types { get; set; } |
| | | 414 | | |
| | | 415 | | public override async Task<object> ReadAsync( |
| | | 416 | | Stream stream, |
| | | 417 | | bool async, |
| | | 418 | | CancellationToken cancellationToken) |
| | | 419 | | { |
| | | 420 | | int option = await AvroParser.ReadIntAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 421 | | return await Types[option].ReadAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 422 | | } |
| | | 423 | | } |
| | | 424 | | |
| | | 425 | | /// <summary> |
| | | 426 | | /// AvroMapType. |
| | | 427 | | /// </summary> |
| | | 428 | | internal class AvroMapType : AvroType |
| | | 429 | | { |
| | | 430 | | public AvroType ItemType { get; set; } |
| | | 431 | | |
| | | 432 | | public override async Task<object> ReadAsync( |
| | | 433 | | Stream stream, |
| | | 434 | | bool async, |
| | | 435 | | CancellationToken cancellationToken) |
| | | 436 | | { |
| | | 437 | | Func<Stream, bool, CancellationToken, Task<object>> parseItemAsync = |
| | | 438 | | async (s, a, c) => await ItemType.ReadAsync(s, a, c).ConfigureAwait(false); |
| | | 439 | | return await AvroParser.ReadMapAsync(stream, parseItemAsync, async, cancellationToken).ConfigureAwait(false) |
| | | 440 | | } |
| | | 441 | | } |
| | | 442 | | |
| | | 443 | | /// <summary> |
| | | 444 | | /// AvroRecordType. |
| | | 445 | | /// </summary> |
| | | 446 | | internal class AvroRecordType : AvroType |
| | | 447 | | { |
| | | 448 | | public string Schema { get; set; } |
| | | 449 | | public IReadOnlyDictionary<string, AvroType> Fields { get; set; } |
| | | 450 | | |
| | | 451 | | public override async Task<object> ReadAsync( |
| | | 452 | | Stream stream, |
| | | 453 | | bool async, |
| | | 454 | | CancellationToken cancellationToken) |
| | | 455 | | { |
| | | 456 | | Dictionary<string, object> record = new Dictionary<string, object>(); |
| | | 457 | | record["$schema"] = Schema; |
| | | 458 | | foreach (KeyValuePair<string, AvroType> field in Fields) |
| | | 459 | | { |
| | | 460 | | record[field.Key] = await field.Value.ReadAsync(stream, async, cancellationToken).ConfigureAwait(false); |
| | | 461 | | } |
| | | 462 | | return record; |
| | | 463 | | } |
| | | 464 | | } |
| | | 465 | | } |