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- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Reflection;
- using System.Reflection.Emit;
- using System.Text;
- using System.Threading.Tasks;
- namespace WCS.Core
- {
- /// <summary>
- /// 动态创建接口实例
- /// </summary>
- /// <typeparam name="T">接口</typeparam>
- /// <typeparam name="TBase">基类</typeparam>
- public static class Generator<T, TBase> where TBase : IProtocolProxy
- {
- static TypeBuilder tb;
- static Type Type;
- static Generator()
- {
- if (!typeof(T).IsInterface)
- throw new Exception("T必须是interface");
- if (!typeof(TBase).IsClass)
- throw new Exception("TBase必须是class");
- AssemblyName myAssemblyName = new AssemblyName();
- myAssemblyName.Name = typeof(T).Name + "_Generate";
- AssemblyBuilder myAssembly = AssemblyBuilder.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.RunAndCollect);
- //AssemblyBuilder myAssembly = AssemblyBuilder.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.RunAndSave);
- ModuleBuilder myModule = myAssembly.DefineDynamicModule("Main");
- tb = myModule.DefineType(typeof(T).Name + "_Generate", TypeAttributes.Public, typeof(TBase), new Type[] { typeof(T) });
- InitConstructors();
- InitMethods();
- InitProperties();
- InitEvents();
- try
- {
- Type = tb.CreateTypeInfo().AsType();//.CreateType();
- }
- catch (Exception ex)
- {
- }
- //myAssembly.Save(typeof(T).Name + ".dll");
- }
- private const MethodAttributes METHOD_ATTRIBUTES =
- MethodAttributes.Public | MethodAttributes.NewSlot | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.HideBySig;
- static void InitConstructors()
- {
- foreach (var cons in typeof(TBase).GetConstructors())
- {
- var pTypes = cons.GetParameters().Select(v => v.ParameterType).ToArray();
- var build = tb.DefineConstructor(cons.Attributes, CallingConventions.Standard, pTypes);
- for (int i = 0; i < pTypes.Length; i++)
- {
- build.DefineParameter(i + 1, ParameterAttributes.In, "p" + i);
- }
- var il = build.GetILGenerator();
- il.Emit(OpCodes.Ldarg_0);
- for (int i = 0; i < pTypes.Length; i++)
- {
- il.Emit(OpCodes.Ldarg, i + 1);
- }
- il.Emit(OpCodes.Call, cons);
- //il.Emit(OpCodes.Pop);
- il.Emit(OpCodes.Ret);
- }
- }
- static void InitMethods()
- {
- var ms = GetInterfaces().SelectMany(v => v.GetMethods()).ToArray();
- ms = ms.Where(v => !v.IsSpecialName).ToArray();
- foreach (var m in ms)
- {
- GenerateMethod(m);
- }
- }
- static void InitProperties()
- {
- var ps = GetInterfaces().SelectMany(v => v.GetProperties());
- ps = GetMembers().OfType<PropertyInfo>();
- foreach (var p in ps)
- {
- if (typeof(TBase).GetProperty(p.Name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic) != null)
- {
- continue;
- }
- var pTypes = p.GetIndexParameters().Select(v => v.ParameterType).ToArray();
- var pb = tb.DefineProperty(p.Name, p.Attributes, p.PropertyType, pTypes);
- if (p.CanRead)
- {
- if (pTypes.Length > 0)
- {//索引器
- var mb = GenerateIndexer(p.GetGetMethod());
- pb.SetGetMethod(mb);
- }
- else
- {
- var mb = GenerateProperty(p.GetGetMethod());
- pb.SetGetMethod(mb);
- }
- }
- if (p.CanWrite)
- {
- if (pTypes.Length > 0)
- {
- var mb = GenerateIndexer(p.GetSetMethod());
- pb.SetSetMethod(mb);
- }
- else
- {
- var mb = GenerateProperty(p.GetSetMethod());
- pb.SetSetMethod(mb);
- }
- }
- }
- }
- static void InitEvents()
- {
- var evts = GetInterfaces().SelectMany(v => v.GetEvents());
- foreach (var evt in evts)
- {
- var eb = tb.DefineEvent(evt.Name, evt.Attributes, evt.EventHandlerType);
- var add = GenerateEventEnabled(evt, evt.GetAddMethod());
- eb.SetAddOnMethod(add);
- var remove = GenerateEventEnabled(evt, evt.GetRemoveMethod());
- eb.SetRemoveOnMethod(remove);
- }
- }
- static MethodBuilder GenerateMethod(MethodInfo m)
- {
- var pTypes = m.GetParameters().Select(v => v.ParameterType).ToArray();
- var mb = tb.DefineMethod(m.Name, METHOD_ATTRIBUTES, CallingConventions.Standard, m.ReturnType, pTypes);
- var ilGen = mb.GetILGenerator();
-
- ilGen.DeclareLocal(typeof(object[]));//声明object数组变量
- #region 参数准备
- ilGen.Emit(OpCodes.Ldarg_0); //this
- ilGen.Emit(OpCodes.Ldstr,m.Name); //string name
- ilGen.Emit(OpCodes.Ldc_I4_S, pTypes.Length);//数组长度
- ilGen.Emit(OpCodes.Newarr, typeof(object));//数组
- ilGen.Emit(OpCodes.Stloc_0);
- for (int i = 0; i < pTypes.Length; i++)
- {
- ilGen.Emit(OpCodes.Ldloc_0);
- ilGen.Emit(OpCodes.Ldc_I4_S, i);
- ilGen.Emit(OpCodes.Ldarg_S, 1 + i);
- ilGen.Emit(OpCodes.Box, pTypes[i]);
- ilGen.Emit(OpCodes.Stelem_Ref);
- }
- #endregion
- ilGen.Emit(OpCodes.Ldloc_0);
- if (m.ReturnType != typeof(void))
- {
- var mi = typeof(TBase).GetMethod("CallReturn", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
- mi = mi.MakeGenericMethod(m.ReturnType);
- ilGen.Emit(OpCodes.Call, mi);
- LocalBuilder local = ilGen.DeclareLocal(m.ReturnType);
- ilGen.Emit(OpCodes.Stloc_1, local);
- ilGen.Emit(OpCodes.Ldloc_1, local);
- }
- else
- {
- var mi = typeof(TBase).GetMethod("CallVoid", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
- ilGen.Emit(OpCodes.Call, mi);
- }
- ilGen.Emit(OpCodes.Ret);
- return mb;
- }
- static MethodBuilder GenerateProperty(MethodInfo m)
- {
- var pTypes = m.GetParameters().Select(v => v.ParameterType).ToArray();
- var mb = tb.DefineMethod(m.Name, METHOD_ATTRIBUTES, CallingConventions.Standard, m.ReturnType, pTypes);
- var ilGen = mb.GetILGenerator();
- #region 参数准备
- ilGen.Emit(OpCodes.Ldarg_0); //this
- ilGen.Emit(OpCodes.Ldstr, m.Name.Replace("set_", "").Replace("get_", "")); //string name
- #endregion
- if (m.Name.StartsWith("set_"))
- {
- ilGen.Emit(OpCodes.Ldarg_1);//value 准备参数
- var mi = typeof(TBase).GetMethod("Set", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
- mi = mi.MakeGenericMethod(pTypes);
- ilGen.Emit(OpCodes.Call, mi); //调用基类方法
- //ilGen.Emit(OpCodes.Pop);
- }
- else
- {
- var mi = typeof(TBase).GetMethod("Get", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
- mi = mi.MakeGenericMethod(m.ReturnType);
- ilGen.Emit(OpCodes.Call, mi);//调用方法
- #region 返回值
- LocalBuilder local = ilGen.DeclareLocal(m.ReturnType);
- ilGen.Emit(OpCodes.Stloc_0, local);
- ilGen.Emit(OpCodes.Ldloc_0, local);
-
- #endregion
- }
- ilGen.Emit(OpCodes.Ret);//return
- return mb;
- }
- static MethodBuilder GenerateIndexer(MethodInfo m)
- {
- var pTypes = m.GetParameters().Select(v => v.ParameterType).ToArray();
- var mb = tb.DefineMethod(m.Name, METHOD_ATTRIBUTES, CallingConventions.Standard, m.ReturnType, pTypes);
- var ilGen = mb.GetILGenerator();
- #region 参数准备
- ilGen.DeclareLocal(typeof(object[]));//声明object数组变量
- ilGen.Emit(OpCodes.Ldarg_0); //this
- ilGen.Emit(OpCodes.Ldc_I4_S, pTypes.Length);//数组长度
- ilGen.Emit(OpCodes.Newarr, typeof(object));//数组
- ilGen.Emit(OpCodes.Stloc_0);
- int i = 0;
- for (i = 0; i < pTypes.Length; i++)
- {
- ilGen.Emit(OpCodes.Ldloc_0);
- ilGen.Emit(OpCodes.Ldc_I4_S, i);
- ilGen.Emit(OpCodes.Ldarg_S, 1 + i);
- ilGen.Emit(OpCodes.Box, pTypes[i]);
- ilGen.Emit(OpCodes.Stelem_Ref);
- }
- #endregion
- ilGen.Emit(OpCodes.Ldloc_0);
- if (m.Name.StartsWith("set"))
- {
- //ilGen.Emit(OpCodes.Ldarg_S, 1 + i);//value 准备参数
- var mi = typeof(TBase).GetMethod("SetItem", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
- ilGen.Emit(OpCodes.Call, mi); //调用基类方法
- //ilGen.Emit(OpCodes.Pop);
- }
- else
- {
- var mi = typeof(TBase).GetMethod("GetItem", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
- mi = mi.MakeGenericMethod(m.ReturnType);
- ilGen.Emit(OpCodes.Call, mi);//调用方法
- #region 返回值
- LocalBuilder local = ilGen.DeclareLocal(m.ReturnType);
- ilGen.Emit(OpCodes.Stloc_1, local);
- ilGen.Emit(OpCodes.Ldloc_1, local);
- #endregion
- }
- ilGen.Emit(OpCodes.Ret);//return
- return mb;
- }
- static MethodBuilder GenerateEventEnabled(EventInfo evt, MethodInfo m)
- {
- bool add = m.Name.StartsWith("add_");
- var n = m.DeclaringType.Name;
- var pTypes = m.GetParameters().Select(v => v.ParameterType).ToArray();
- var mb = tb.DefineMethod(m.Name, METHOD_ATTRIBUTES, CallingConventions.Standard, m.ReturnType, pTypes);
- var ilGen = mb.GetILGenerator();
- //ilGen.DeclareLocal(typeof(EventInfo));//声明字符串变量
- //ilGen.DeclareLocal(typeof(Delegate)); //value Delegate
- //ilGen.Emit(OpCodes.Ldstr, evt.Name);//string evtName 字符串值
- //ilGen.Emit(OpCodes.Stloc_0);//保存至变量
- //ilGen.Emit(OpCodes.Ldarg_1);//Delegate dlg
- //ilGen.Emit(OpCodes.Stloc_1);//保存至变量
- #region 参数准备
- ilGen.Emit(OpCodes.Ldarg_0);
- ilGen.Emit(OpCodes.Ldstr,evt.Name);
- ilGen.Emit(OpCodes.Ldarg_1);
- #endregion
- var mname = add ? "AddEvent" :"RemoveEvent";
- ilGen.Emit(OpCodes.Call, typeof(TBase).GetMethod(mname, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public));
- ilGen.Emit(OpCodes.Ret);
- return mb;
- }
- static Type[] GetInterfaces()
- {
- var tInterface = typeof(T);
- var ts = tInterface.GetInterfaces().ToList();
- ts.Add(tInterface);
- return ts.ToArray();
- }
- static MemberInfo[] GetMembers()
- {
- var members = GetInterfaces().SelectMany(v => v.GetMembers()).Distinct().ToArray();
- return members;
- }
- public static T Create(params object[] args)
- {
- return (T)Activator.CreateInstance(Type, args);
- }
- public static Type GetGenerateType()
- {
- return Type;
- }
- }
-
- }
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