- check if type inherits from IGBaseObject

GBase/Factories/GBaseTableFactory.cs

@@ -3,6 +3,7 @@
 // Copyright(c) 2020 SimonG. All Rights Reserved.
 
 using System;
+using GBase.Exceptions;
 using GBase.FileHandling.Factories;
 using GBase.Interfaces;
 using GBase.Interfaces.DataHandling.Pool;
@@ -38,6 +39,9 @@ namespace GBase.Factories
         /// <returns>A newly created instance of the implementation for <see cref="IGBaseTable"/></returns>
         public IGBaseTable Create(Type type)
         {
+            if (!typeof(IGBaseObject).IsAssignableFrom(type))
+                throw new InvalidTableTypeException(type);
+            
             Type gBaseTableType = typeof(GBaseTable<>).MakeGenericType(type);
             return (IGBaseTable) Activator.CreateInstance(gBaseTableType, _fileHandlerFactory, _dataHandlerPool, _gBaseColumnFactory);
         }