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
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+/*
+ * 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.Linq;
+using System.Collections.Generic;
+
+namespace QuantConnect.Lean.Engine.DataFeeds
+{
+    /// <summary>
+    /// The composite time provider will source it's current time using the smallest time from the given providers
+    /// </summary>
+    public class CompositeTimeProvider : ITimeProvider
+    {
+        private readonly ITimeProvider[] _timeProviders;
+
+        /// <summary>
+        /// Creates a new instance
+        /// </summary>
+        /// <param name="timeProviders">The time providers to use. Will default to the real time provider if empty</param>
+        public CompositeTimeProvider(IEnumerable<ITimeProvider> timeProviders)
+        {
+            _timeProviders = timeProviders.DefaultIfEmpty(RealTimeProvider.Instance).ToArray();
+        }
+
+        /// <summary>
+        /// Gets the current time in UTC
+        /// </summary>
+        /// <returns>The current time in UTC</returns>
+        public DateTime GetUtcNow()
+        {
+            var result = DateTime.MaxValue;
+            for (var i = 0; i < _timeProviders.Length; i++)
+            {
+                var utcNow = _timeProviders[i].GetUtcNow();
+
+                if (utcNow < result)
+                {
+                    // we return the smallest
+                    result = utcNow;
+                }
+            }
+            return result;
+        }
+    }
+}