chore: import upstream snapshot with attribution

2026-07-13 13:02:50 +08:00
commit 0fc60fdcb1
5008 changed files with 910633 additions and 0 deletions
@@ -0,0 +1,82 @@
+/*
+ * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
+ * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
+ *
+ * Licensed 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.
+*/
+
+using System;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace QuantConnect.Util
+{
+    /// <summary>
+    /// Json Converter for ChartPoint which handles special reading
+    /// </summary>
+    public class ChartPointJsonConverter : JsonConverter
+    {
+        /// <summary>
+        /// Determine if this Converter can convert this type
+        /// </summary>
+        /// <param name="objectType">Type that we would like to convert</param>
+        /// <returns>True if <see cref="Series"/></returns>
+        public override bool CanConvert(Type objectType)
+        {
+            return objectType == typeof(ChartPoint);
+        }
+
+        /// <summary>
+        /// Reads series from Json
+        /// </summary>
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if (reader.TokenType == JsonToken.StartObject)
+            {
+                var jObject = JObject.Load(reader);
+                var x = jObject["x"];
+
+                if (!jObject.ContainsKey("y"))
+                {
+                    return new ChartPoint(x.Value<long>(), 0);
+                }
+
+                var y = jObject["y"];
+                if (y != null && (y.Type == JTokenType.Float || y.Type == JTokenType.Integer))
+                {
+                    return new ChartPoint(x.Value<long>(), y.Value<decimal>());
+                }
+
+                if (y.Type == JTokenType.Null)
+                {
+                    return new ChartPoint(x.Value<long>(), null);
+                }
+
+                return null;
+            }
+
+            var jArray = JArray.Load(reader);
+            return new ChartPoint(jArray[0].Value<long>(), jArray[1].Value<decimal?>());
+        }
+
+        /// <summary>
+        /// Write point to Json
+        /// </summary>
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            var chartPoint = (ChartPoint)value;
+            writer.WriteStartArray();
+            writer.WriteValue(chartPoint.X);
+            writer.WriteValue(chartPoint.Y);
+            writer.WriteEndArray();
+        }
+    }
+}