wehub-resource-sync
100 lines
3.4 KiB
C#
100 lines
3.4 KiB
C#
/*
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* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Globalization;
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using Newtonsoft.Json;
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namespace QuantConnect.Util;
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/// <summary>
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/// Json converter to represent decimals as strings
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/// </summary>
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public class DecimalJsonConverter : JsonConverter
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{
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/// <summary>
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/// Gets a value indicating whether this <see cref="JsonConverter"/> can write JSON.
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/// </summary>
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/// <remarks>
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/// This property always returns <c>false</c>, indicating that this converter does not support writing JSON.
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/// </remarks>
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public override bool CanWrite => false;
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/// <summary>
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/// Determines whether this instance can convert the specified object type.
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/// </summary>
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/// <param name="objectType">Type of the object.</param>
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/// <returns><c>true</c> if this instance can convert the specified object type; otherwise, <c>false</c>.</returns>
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public override bool CanConvert(Type objectType)
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{
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return objectType == typeof(decimal) || objectType == typeof(decimal?);
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}
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/// <summary>
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/// Writes the JSON representation of the object.
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/// </summary>
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/// <param name="writer">The <see cref="JsonWriter"/> to write to.</param>
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/// <param name="value">The value.</param>
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/// <param name="serializer">The calling serializer.</param>
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public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
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{
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throw new NotImplementedException();
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}
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/// <summary>
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/// Reads the JSON representation of the object.
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/// </summary>
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/// <param name="reader">The <see cref="JsonReader"/> to read from.</param>
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/// <param name="objectType">Type of the object.</param>
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/// <param name="existingValue">The existing value of object being read.</param>
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/// <param name="serializer">The calling serializer.</param>
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/// <returns>The object value.</returns>
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public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
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{
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var val = reader.Value;
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if (val == null)
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{
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if (objectType == typeof(decimal?))
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{
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return null;
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}
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throw new JsonSerializationException($"Cannot convert null value to {objectType}.");
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}
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if (val is decimal dec)
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{
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return dec;
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}
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if (val is double d)
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{
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return d.SafeDecimalCast();
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}
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if (val is string str && TryParse(str, out var res))
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{
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return res;
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}
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return Convert.ToDecimal(val, CultureInfo.InvariantCulture);
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}
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private static bool TryParse(string str, out decimal value)
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{
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return decimal.TryParse(str, NumberStyles.Any, CultureInfo.InvariantCulture, out value);
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}
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}
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