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.Collections.Generic;
+using QuantConnect.Python;
+
+namespace Common.Util
+{
+    /// <summary>
+    /// Provides a read-only implementation of ExtendedDictionary
+    /// </summary>
+    [PandasNonExpandable]
+    public class ReadOnlyExtendedDictionary<TKey, TValue> : BaseExtendedDictionary<TKey, TValue>, IReadOnlyDictionary<TKey, TValue>
+    {
+        /// <summary>
+        /// Initializes a new instance of the ReadOnlyExtendedDictionary class that is empty
+        /// </summary>
+        public ReadOnlyExtendedDictionary()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the ReadOnlyExtendedDictionary class that contains elements copied from the specified dictionary
+        /// </summary>
+        /// <param name="dictionary">The dictionary whose elements are copied to the new dictionary</param>
+        public ReadOnlyExtendedDictionary(IDictionary<TKey, TValue> dictionary) : base(dictionary)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the ReadOnlyExtendedDictionary class
+        /// using the specified <paramref name="data"/> as a data source
+        /// </summary>
+        /// <param name="data">The data source for this dictionary</param>
+        /// <param name="keySelector">Delegate used to select a key from the value</param>
+        public ReadOnlyExtendedDictionary(IEnumerable<TValue> data, Func<TValue, TKey> keySelector) : base(data, keySelector)
+        {
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the dictionary is read-only
+        /// </summary>
+        public override bool IsReadOnly => true;
+
+        /// <summary>
+        /// Gets an enumerable collection containing the keys of the read-only dictionary
+        /// </summary>
+        IEnumerable<TKey> IReadOnlyDictionary<TKey, TValue>.Keys => base.Keys;
+
+        /// <summary>
+        /// Gets an enumerable collection containing the values of the read-only dictionary
+        /// </summary>
+        IEnumerable<TValue> IReadOnlyDictionary<TKey, TValue>.Values => base.Values;
+
+        /// <summary>
+        /// Gets or sets the value associated with the specified key
+        /// </summary>
+        /// <param name="key">The key of the value to get or set</param>
+        /// <returns>The value associated with the specified key</returns>
+        public override TValue this[TKey key]
+        {
+            get => base[key];
+            set => throw new InvalidOperationException("Dictionary is read-only");
+        }
+
+        /// <summary>
+        /// Removes all items from the dictionary
+        /// </summary>
+        public override void Clear()
+        {
+            throw new InvalidOperationException("Dictionary is read-only");
+        }
+
+        /// <summary>
+        /// Removes the value with the specified key
+        /// </summary>
+        /// <param name="key">The key of the element to remove</param>
+        /// <returns>true if the element was successfully found and removed; otherwise, false</returns>
+        public override bool Remove(TKey key)
+        {
+            throw new InvalidOperationException("Dictionary is read-only");
+        }
+
+        /// <summary>
+        /// Adds an element with the provided key and value to the dictionary
+        /// </summary>
+        /// <param name="key">The key of the element to add</param>
+        /// <param name="value">The value of the element to add</param>
+        public new void Add(TKey key, TValue value)
+        {
+            throw new InvalidOperationException("Dictionary is read-only");
+        }
+
+        /// <summary>
+        /// Adds an element with the provided key-value pair to the dictionary
+        /// </summary>
+        /// <param name="item">The key-value pair to add</param>
+        public new void Add(KeyValuePair<TKey, TValue> item)
+        {
+            throw new InvalidOperationException("Dictionary is read-only");
+        }
+
+        /// <summary>
+        /// Removes the first occurrence of a specific object from the dictionary
+        /// </summary>
+        /// <param name="item">The key-value pair to remove</param>
+        /// <returns>true if the key-value pair was successfully removed; otherwise, false</returns>
+        public new bool Remove(KeyValuePair<TKey, TValue> item)
+        {
+            throw new InvalidOperationException("Dictionary is read-only");
+        }
+    }
+}