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 +1,98 @@
+/*
+ * 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.IO;
+using System.Collections.Generic;
+
+namespace QuantConnect.Lean.Engine.Storage
+{
+    /// <summary>
+    /// Raw file handler
+    /// </summary>
+    /// <remarks>Useful to abstract file operations for <see cref="LocalObjectStore"/></remarks>
+    public class FileHandler
+    {
+        /// <summary>
+        /// True if the given file path exists
+        /// </summary>
+        public virtual bool Exists(string path)
+        {
+            return File.Exists(path);
+        }
+
+        /// <summary>
+        /// Will delete the given file path
+        /// </summary>
+        public virtual void Delete(string path)
+        {
+            File.Delete(path);
+        }
+
+        /// <summary>
+        /// Will write the given byte array at the target file path
+        /// </summary>
+        public virtual void WriteAllBytes(string path, byte[] data)
+        {
+            File.WriteAllBytes(path, data);
+        }
+
+        /// <summary>
+        /// Read all bytes in the given file path
+        /// </summary>
+        public virtual byte[] ReadAllBytes(string path)
+        {
+            return File.ReadAllBytes(path);
+        }
+
+        /// <summary>
+        /// Will try to fetch the given file length, will return 0 if it doesn't exist
+        /// </summary>
+        public virtual long TryGetFileLength(string path)
+        {
+            var fileInfo = new FileInfo(path);
+            if (fileInfo.Exists)
+            {
+                return fileInfo.Length;
+            }
+            return 0;
+        }
+
+        /// <summary>
+        /// True if the given directory exists
+        /// </summary>
+        public virtual bool DirectoryExists(string path)
+        {
+            return Directory.Exists(path);
+        }
+
+        /// <summary>
+        /// Create the requested directory path
+        /// </summary>
+        public virtual DirectoryInfo CreateDirectory(string path)
+        {
+            return Directory.CreateDirectory(path);
+        }
+
+        /// <summary>
+        /// Enumerate the files in the target path
+        /// </summary>
+        public virtual IEnumerable<FileInfo> EnumerateFiles(string path, string pattern, SearchOption searchOption, out string rootfolder)
+        {
+            var directoryInfo = new DirectoryInfo(path);
+            rootfolder = directoryInfo.FullName;
+            return directoryInfo.EnumerateFiles(pattern, searchOption);
+        }
+    }
+}