Refactor IMapper.From to return interface

src/Mapster.DependencyInjection/ServiceMapper.cs

@@ -13,7 +13,7 @@ public ServiceMapper(IServiceProvider serviceProvider, TypeAdapterConfig config)
             _serviceProvider = serviceProvider;
         }
 
-        public override TypeAdapterBuilder<TSource> From<TSource>(TSource source)
+        public override ITypeAdapterBuilder<TSource> From<TSource>(TSource source)
         {
             return base.From(source)
                 .AddParameters(DI_KEY, _serviceProvider);

src/Mapster.EF6/TypeAdapterBuilderExtensions.cs

@@ -12,7 +12,7 @@ namespace Mapster
 {
     public static class TypeAdapterBuilderExtensions
     {
-        public static TypeAdapterBuilder<TSource> EntityFromContext<TSource>(this TypeAdapterBuilder<TSource> builder, IObjectContextAdapter context)
+        public static ITypeAdapterBuilder<TSource> EntityFromContext<TSource>(this ITypeAdapterBuilder<TSource> builder, IObjectContextAdapter context)
         {
             const string DB_KEY = "Mapster.EF6.db";
             return builder

src/Mapster.EFCore/TypeAdapterBuilderExtensions.cs

@@ -12,7 +12,7 @@ namespace Mapster
 {
     public static class TypeAdapterBuilderExtensions
     {
-        public static TypeAdapterBuilder<TSource> EntityFromContext<TSource>(this TypeAdapterBuilder<TSource> builder, DbContext context)
+        public static ITypeAdapterBuilder<TSource> EntityFromContext<TSource>(this ITypeAdapterBuilder<TSource> builder, DbContext context)
         {
             const string dbKey = "Mapster.EFCore.db";
             return builder

src/Mapster/Interfaces/IMapper.cs

@@ -7,7 +7,7 @@ namespace MapsterMapper
     public interface IMapper
     {
         TypeAdapterConfig Config { get; }
-        TypeAdapterBuilder<TSource> From<TSource>(TSource source);
+        ITypeAdapterBuilder<TSource> From<TSource>(TSource source);
         TDestination Map<TDestination>(object source);
         TDestination Map<TSource, TDestination>(TSource source);
         TDestination Map<TSource, TDestination>(TSource source, TDestination destination);

src/Mapster/Interfaces/ITypeAdapterBuilder.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq.Expressions;
+using System.Runtime.CompilerServices;
+
+namespace Mapster
+{
+    public interface ITypeAdapterBuilder<T> : IAdapterBuilder<T>
+    {
+        [SuppressMessage("ReSharper", "ExplicitCallerInfoArgument")]
+        ITypeAdapterBuilder<T> ForkConfig(Action<TypeAdapterConfig> action,
+#if !NET40
+            [CallerFilePath]
+#endif
+            string key1 = "",
+#if !NET40
+            [CallerLineNumber]
+#endif
+            int key2 = 0);
+        ITypeAdapterBuilder<T> AddParameters(string name, object value);
+        Expression<Func<T, TDestination>> CreateMapExpression<TDestination>();
+        Expression<Func<T, TDestination, TDestination>> CreateMapToTargetExpression<TDestination>();
+        Expression<Func<T, TDestination>> CreateProjectionExpression<TDestination>();
+    }
+}

src/Mapster/Mapper.cs

@@ -16,9 +16,9 @@ public Mapper(TypeAdapterConfig config)
             Config = config;
         }
 
-        public virtual TypeAdapterBuilder<TSource> From<TSource>(TSource source)
+        public virtual ITypeAdapterBuilder<TSource> From<TSource>(TSource source)
         {
-            return new TypeAdapterBuilder<TSource>(source, Config);
+            return TypeAdapter.BuildAdapter(source, Config);
         }
 
         public virtual TDestination Map<TDestination>(object source)
@@ -76,4 +76,4 @@ public virtual object Map(object source, object destination, Type sourceType, Ty
         }
     }
 
-}
+}

src/Mapster/TypeAdapter.cs

@@ -5,12 +5,12 @@ namespace Mapster
 {
     public static class TypeAdapter
     {
-        public static TypeAdapterBuilder<TSource> BuildAdapter<TSource>(this TSource source)
+        public static ITypeAdapterBuilder<TSource> BuildAdapter<TSource>(this TSource source)
         {
             return new TypeAdapterBuilder<TSource>(source, TypeAdapterConfig.GlobalSettings);
         }
 
-        public static TypeAdapterBuilder<TSource> BuildAdapter<TSource>(this TSource source, TypeAdapterConfig config)
+        public static ITypeAdapterBuilder<TSource> BuildAdapter<TSource>(this TSource source, TypeAdapterConfig config)
         {
             return new TypeAdapterBuilder<TSource>(source, config);
         }

src/Mapster/TypeAdapterBuilder.cs

@@ -7,7 +7,7 @@
 
 namespace Mapster
 {
-    public class TypeAdapterBuilder<TSource> : IAdapterBuilder<TSource>
+    public class TypeAdapterBuilder<TSource> : ITypeAdapterBuilder<TSource>
     {
         TSource Source { get; }
         TSource IAdapterBuilder<TSource>.Source => this.Source;
@@ -26,7 +26,7 @@ internal TypeAdapterBuilder(TSource source, TypeAdapterConfig config)
         }
 
         [SuppressMessage("ReSharper", "ExplicitCallerInfoArgument")]
-        public TypeAdapterBuilder<TSource> ForkConfig(Action<TypeAdapterConfig> action,
+        public ITypeAdapterBuilder<TSource> ForkConfig(Action<TypeAdapterConfig> action,
 #if !NET40
             [CallerFilePath]
 #endif
@@ -40,7 +40,7 @@ public TypeAdapterBuilder<TSource> ForkConfig(Action<TypeAdapterConfig> action,
             return this;
         }
 
-        public TypeAdapterBuilder<TSource> AddParameters(string name, object value)
+        public ITypeAdapterBuilder<TSource> AddParameters(string name, object value)
         {
             this.Parameters.Add(name, value);
             return this;
@@ -112,4 +112,4 @@ public Expression<Func<TSource, TDestination>> CreateProjectionExpression<TDesti
             return (Expression<Func<TSource, TDestination>>) this.Config.CreateMapExpression(tuple, MapType.Projection);
         }
     }
-}
+}