68 lines
2.9 KiB
C#
68 lines
2.9 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection.Emit;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace SqlSugar
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{
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internal class EmitTool
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{
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internal static ModuleBuilder CreateModuleBuilder()
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{
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AssemblyBuilder assemblyBuilder = CreateAssembly();
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ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("DynamicModule");
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return moduleBuilder;
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}
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internal static AssemblyBuilder CreateAssembly()
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{
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AssemblyName assemblyName = new AssemblyName($"DynamicAssembly_{Guid.NewGuid():N}");
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AssemblyBuilder assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.RunAndCollect);
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return assemblyBuilder;
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}
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internal static TypeBuilder CreateTypeBuilder(string className, TypeAttributes attributes, Type baseType, Type[] interfaces)
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{
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ModuleBuilder moduleBuilder = EmitTool.CreateModuleBuilder();
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TypeBuilder typeBuilder = moduleBuilder.DefineType(className, attributes, baseType, interfaces);
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return typeBuilder;
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}
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internal static PropertyBuilder CreateProperty(TypeBuilder typeBuilder, string propertyName, Type propertyType, IEnumerable<CustomAttributeBuilder> propertyCustomAttributes = null)
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{
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FieldBuilder fieldBuilder = typeBuilder.DefineField($"_{propertyName}", propertyType, FieldAttributes.Private);
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PropertyBuilder propertyBuilder = typeBuilder.DefineProperty(propertyName, PropertyAttributes.None, propertyType, null);
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MethodBuilder getterBuilder = typeBuilder.DefineMethod($"get_{propertyName}", MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig, propertyType, Type.EmptyTypes);
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ILGenerator getterIL = getterBuilder.GetILGenerator();
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getterIL.Emit(OpCodes.Ldarg_0);
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getterIL.Emit(OpCodes.Ldfld, fieldBuilder);
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getterIL.Emit(OpCodes.Ret);
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MethodBuilder setterBuilder = typeBuilder.DefineMethod($"set_{propertyName}", MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig, null, new[] { propertyType });
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ILGenerator setterIL = setterBuilder.GetILGenerator();
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setterIL.Emit(OpCodes.Ldarg_0);
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setterIL.Emit(OpCodes.Ldarg_1);
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setterIL.Emit(OpCodes.Stfld, fieldBuilder);
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setterIL.Emit(OpCodes.Ret);
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propertyBuilder.SetGetMethod(getterBuilder);
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propertyBuilder.SetSetMethod(setterBuilder);
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if (propertyCustomAttributes != null)
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{
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foreach (var attributeBuilder in propertyCustomAttributes)
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{
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propertyBuilder.SetCustomAttribute(attributeBuilder);
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}
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}
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return propertyBuilder;
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}
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}
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}
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