wehub-resource-sync
94 lines
3.5 KiB
C#
94 lines
3.5 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.Collections.Generic;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Linq;
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using QuantConnect.Optimizer.Parameters;
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namespace QuantConnect.Api
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{
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/// <summary>
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/// Json converter for <see cref="ParameterSet"/> which creates a light weight easy to consume serialized version
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/// </summary>
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public class ParameterSetJsonConverter : JsonConverter
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{
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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>
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/// <c>true</c> if this instance can convert the specified object type; otherwise, <c>false</c>.
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/// </returns>
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public override bool CanConvert(Type objectType)
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{
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return objectType == typeof(ParameterSet);
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}
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/// <summary>
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/// Writes a JSON object from a Parameter set
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/// </summary>
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public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
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{
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var parameterSet = value as ParameterSet;
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if (ReferenceEquals(parameterSet, null)) return;
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writer.WriteStartObject();
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if (parameterSet.Value != null)
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{
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writer.WritePropertyName("parameterSet");
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serializer.Serialize(writer, parameterSet.Value);
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}
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writer.WriteEndObject();
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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="T:Newtonsoft.Json.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>
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/// The object value.
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/// </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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if (reader.TokenType == JsonToken.StartArray)
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{
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if (JArray.Load(reader).Count == 0)
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{
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return new ParameterSet(-1, new Dictionary<string, string>());
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}
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}
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else if (reader.TokenType == JsonToken.StartObject)
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{
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var jObject = JObject.Load(reader);
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var value = jObject["parameterSet"] ?? jObject;
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var parameterSet = new ParameterSet(-1, value.ToObject<Dictionary<string, string>>());
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return parameterSet;
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}
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throw new ArgumentException($"Unexpected Tokentype {reader.TokenType}");
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}
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}
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}
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