Cross Migration Added & bug Fixes

Author: RohitM-IN

Factory/QueryGeneratorFactory.cs

@@ -0,0 +1,52 @@
+using DbSyncKit.DB.Enum;
+using DbSyncKit.DB.Interface;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DbSyncKit.DB.Factory
+{
+    /// <summary>
+    /// Factory class for creating instances of <see cref="IQueryGenerator"/> based on the specified <see cref="DatabaseProvider"/>.
+    /// </summary>
+    public static class QueryGeneratorFactory
+    {
+        /// <summary>
+        /// Gets an instance of <see cref="IQueryGenerator"/> based on the specified <paramref name="provider"/>.
+        /// </summary>
+        /// <param name="provider">The database provider for which to get the query generator.</param>
+        /// <returns>An instance of <see cref="IQueryGenerator"/> for the specified database provider.</returns>
+        /// <exception cref="ArgumentException">Thrown if the <paramref name="provider"/> is not supported.</exception>
+        /// <exception cref="TypeLoadException">Thrown if the type for the specified database provider is not found.</exception>
+        public static IQueryGenerator GetQueryGenerator(DatabaseProvider provider)
+        {
+            string namespacePrefix; // Adjust this to your actual namespace
+            string className = "QueryGenerator";
+
+            switch (provider)
+            {
+                case DatabaseProvider.MSSQL:
+                    namespacePrefix = "DbSyncKit.MSSQL";
+                    break;
+                case DatabaseProvider.MySQL:
+                    namespacePrefix = "DbSyncKit.MySQL";
+                    break;
+                // Add cases for other providers as needed
+                default:
+                    throw new ArgumentException("Unsupported database provider", nameof(provider));
+            }
+
+            string fullClassName = $"{namespacePrefix}.{className}, {namespacePrefix}";
+
+            // Use reflection to create an instance of the specified class
+            Type queryGeneratorType = Type.GetType(fullClassName)!;
+            if (queryGeneratorType == null)
+                throw new TypeLoadException($"Type {fullClassName} not found.");
+
+            return (IQueryGenerator)Activator.CreateInstance(queryGeneratorType)!;
+        }
+    }
+    
+}