feat:support for concurrent file-based queries

binding/csharp/IP2Region.Net/Internal/CacheStrategyFactory.cs

@@ -0,0 +1,31 @@
+// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+
+using IP2Region.Net.Internal.Abstractions;
+using IP2Region.Net.XDB;
+
+namespace IP2Region.Net.Internal;
+
+internal class CacheStrategyFactory
+{
+    private readonly string _xdbPath;
+
+    public CacheStrategyFactory(string xdbPath)
+    {
+        _xdbPath = xdbPath;
+    }
+
+    public AbstractCacheStrategy CreateCacheStrategy(CachePolicy cachePolicy)
+    {
+        return cachePolicy switch
+        {
+            CachePolicy.Content => new ContentCacheStrategy(_xdbPath),
+            CachePolicy.VectorIndex => new VectorIndexCacheStrategy(_xdbPath),
+            CachePolicy.File => new FileCacheStrategy(_xdbPath),
+            _ => throw new ArgumentException(nameof(cachePolicy))
+        };
+    }
+}