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ServerBase/Meta/MetaAssets/ContentLoader.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+
+
+namespace ServerBase;
+
+public static class ContentLoader
+{
+    public static T? loadFile<T>(string dataDir, string fileName) where T : ContentTableBase<T>
+    {
+        try
+        {
+            string exactPath = Path.GetFullPath(dataDir);
+
+            string data = File.ReadAllText(Path.Combine(dataDir, fileName));
+            return Newtonsoft.Json.JsonConvert.DeserializeObject<T>(data);
+        }
+        catch (Exception ex)
+        {
+            throw new Exception($"content load fail. dataDir: {dataDir}, fileName: {fileName}", ex);
+        }
+    }
+
+    public static T? loadMultipleFiles<T>(string dataDir, string filePattern) where T : ContentTableBase<T>
+    {
+        var files = Directory.GetFiles(dataDir, filePattern, SearchOption.TopDirectoryOnly);
+
+        List<T> tables = new List<T>();
+        foreach (string file in files)
+        {
+            string data = File.ReadAllText(file);
+            T? json = Newtonsoft.Json.JsonConvert.DeserializeObject<T>(data);
+
+            if (json != null)
+                tables.Add(json);
+        }
+
+        T? oneTable = null;
+        foreach (var table in tables)
+        {
+            if (oneTable == null)
+                oneTable = table;
+            else
+                oneTable.merge(table);
+        }
+
+        return oneTable;
+    }
+}

ServerBase/Meta/MetaAssets/ContentTableBase.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+
+namespace ServerBase;
+
+public class ContentTableBase<T>
+{
+    public virtual void merge(T table) { }
+}

ServerBase/Meta/MetaAssets/IMetaData.cs

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+
+
+namespace ServerBase;
+
+public interface IMetaData
+{
+    string toBasicString();
+}