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 +1,70 @@
+/*
+ * 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 System.Globalization;
+
+namespace QuantConnect.Util
+{
+    /// <summary>
+    /// Allows for conversion of string numeric values from JSON to the <see cref="decimal"/> type
+    /// </summary>
+    public class StringDecimalJsonConverter : TypeChangeJsonConverter<decimal, string>
+    {
+        private readonly bool _defaultOnFailure;
+
+        /// <summary>
+        /// Creates an instance of the class, with an optional flag to default to decimal's default value on failure.
+        /// </summary>
+        /// <param name="defaultOnFailure">Default to decimal's default value on failure</param>
+        public StringDecimalJsonConverter(bool defaultOnFailure = false)
+        {
+            _defaultOnFailure = defaultOnFailure;
+        }
+
+        /// <summary>
+        /// Converts a decimal to a string
+        /// </summary>
+        /// <param name="value">The input value to be converted before serialization</param>
+        /// <returns>String representation of the decimal</returns>
+        protected override string Convert(decimal value)
+        {
+            return value.ToStringInvariant();
+        }
+
+        /// <summary>
+        /// Converts the input string to a decimal
+        /// </summary>
+        /// <param name="value">The deserialized value that needs to be converted to T</param>
+        /// <returns>The converted value</returns>
+        protected override decimal Convert(string value)
+        {
+            try
+            {
+                return decimal.Parse(value, NumberStyles.Any, CultureInfo.InvariantCulture);
+            }
+            catch (Exception)
+            {
+                if (_defaultOnFailure)
+                {
+                    return default(decimal);
+                }
+
+                throw;
+            }
+        }
+    }
+}