using System.Text.Json.Schema; namespace System.Text.Json.Serialization.Converters { internal sealed class VersionConverter : JsonPrimitiveConverter<Version> { public override Version Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { if (reader.TokenType == JsonTokenType.Null) return null; if (reader.TokenType != JsonTokenType.String) ThrowHelper.ThrowInvalidOperationException_ExpectedString(reader.TokenType); return ReadCore(ref reader); } private static Version ReadCore(ref Utf8JsonReader reader) { string string = reader.GetString(); if (!string.IsNullOrEmpty(string) && (!char.IsDigit(string[0]) || !char.IsDigit(string[string.Length - 1]))) ThrowHelper.ThrowFormatException(DataType.Version); if (Version.TryParse(string, out Version result)) return result; ThrowHelper.ThrowJsonException(null); return null; } public override void Write(Utf8JsonWriter writer, Version value, JsonSerializerOptions options) { if ((object)value == null) writer.WriteNullValue(); else writer.WriteStringValue(value.ToString()); } internal override Version ReadAsPropertyNameCore(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { return ReadCore(ref reader); } internal override void WriteAsPropertyNameCore(Utf8JsonWriter writer, Version value, JsonSerializerOptions options, bool isWritingExtensionDataProperty) { if ((object)value == null) ThrowHelper.ThrowArgumentNullException("value"); writer.WritePropertyName(value.ToString()); } internal override JsonSchema GetSchema(JsonNumberHandling _) { return new JsonSchema { Type = JsonSchemaType.String, Comment = "Represents a version string.", Pattern = "^\\d+(\\.\\d+){1,3}$" }; } } }