private static void BuildFunc(CacheMethod method, ILGenerator il, Type keyType, Type valueType)
{
Type funcType;
if (method.Method.IsAbstract)
{
Ldarg(il, method.Value + 1);
funcType = method.Method.GetParameters()[method.Value].ParameterType;
}
else
{
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldftn, method.Method);
var result = method.Method.GetParameters().Select(p => p.ParameterType).Union(new[] { valueType }).ToArray();
funcType = result.Length switch
{
1 => typeof(Func <>).MakeGenericType(result),
2 => typeof(Func <,>).MakeGenericType(result),
3 => typeof(Func <, ,>).MakeGenericType(result),
4 => typeof(Func <, , ,>).MakeGenericType(result),
_ => throw CacheTypeResolver.ParameterException(method.Method.DeclaringType, method.Method)
};
il.Emit(OpCodes.Newobj, funcType.GetConstructors()[0]);
}
var args = funcType.GetGenericArguments();
Type?arg1 = null, arg2 = null, arg3 = null, returnArg = null;
if (args.Length > 1)
{
arg1 = args[0] == keyType ? typeof(object) : args[0];
}
if (args.Length > 2)
{
arg2 = args[1] == keyType ? typeof(object) : args[1];
}
if (args.Length > 3)
{
arg3 = args[2] == keyType ? typeof(object) : args[2];
}
if (args.Length > 4)
{
throw CacheTypeResolver.ParameterException(method.Method.DeclaringType, method.Method);
}
if (args[args.Length - 1].IsGenericType)
{
var type = args[args.Length - 1].GetGenericTypeDefinition();
if (type == typeof(Task <>) || type == typeof(ValueTask <>))
{
returnArg = type;
}
}
if (arg1 != typeof(object) || arg2 != typeof(TimeSpan) || arg3 != typeof(CancellationToken) || method.AsyncType != null && returnArg != typeof(ValueTask <>))
{
il.Emit(OpCodes.Call, (method.AsyncType == null
? FuncHelper.GetWrapMethod(arg1, arg2, arg3, returnArg)
: FuncHelper.GetWrapAsyncMethod(arg1, arg2, arg3, returnArg))
.MakeGenericMethod(keyType, method.ValueType));
}
}
public static Type CreateProxy(ModuleBuilder module, Type type)
{
if (module == null)
{
throw new ArgumentNullException(nameof(module));
}
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
var tb = module.DefineType($"{type.FullName}@Proxy@{type.Assembly.GetHashCode()}", TypeAttributes.Class | TypeAttributes.Sealed | TypeAttributes.NotPublic);
var cacheType = CacheTypeResolver.Resolve(type);
var fb = MakeField(tb, cacheType);
foreach (var method in cacheType.Methods)
{
var mb = tb.DefineMethod(method.Method.Name,
type.IsInterface
? MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.NewSlot
: MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.HideBySig,
method.Method.ReturnType,
method.Method.GetParameters().Select(p => p.ParameterType).ToArray());
var il = mb.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, fb);
il.Emit(OpCodes.Ldarg_1);
switch (method.Operation)
{
case CacheOperation.Get:
BuildGet(method, il, cacheType.DefaultTtl);
break;
case CacheOperation.Set:
BuildSet(method, il, cacheType.DefaultTtl);
break;
case CacheOperation.Remove:
BuildRemove(method, il);
break;
default:
throw new InvalidOperationException($"{mb.Name}不支持的操作{method.Operation}");
}
il.Emit(OpCodes.Ret);
if (type.IsInterface)
{
tb.DefineMethodOverride(mb, method.Method);
}
}
#if NETSTANDARD2_0
return(tb.CreateTypeInfo() !);
#else
return(tb.CreateType() !);
#endif
}
private Type CreateProxy(ModuleBuilder module, Type type)
{
if (module == null)
{
throw new ArgumentNullException(nameof(module));
}
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
var proxyType = module.DefineType($"{type.FullName}@Proxy@{type.Assembly.GetHashCode()}", TypeAttributes.Class | TypeAttributes.Sealed | TypeAttributes.NotPublic);
#endif
var cacheType = CacheTypeResolver.Resolve(type);
var filed = proxyType.DefineField("_helper", typeof(CacheHelper), FieldAttributes.Private | FieldAttributes.InitOnly);
BuildConstructors(proxyType, cacheType, filed);
foreach (var method in cacheType.Methods)
{
var mb = proxyType.DefineMethod(method.Method.Name,
type.IsInterface
? MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.NewSlot
: MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig,
method.Method.ReturnType,
method.Method.GetParameters().Select(p => p.ParameterType).ToArray());
var il = mb.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, filed);
il.Emit(OpCodes.Ldarg_1);
DefineGenericParameters(mb, method.Method);
switch (method.Operation)
{
case CacheOperation.Get:
BuildGet(method, il, cacheType.DefaultTtl);
break;
case CacheOperation.Set:
BuildSet(method, il, cacheType.DefaultTtl);
break;
case CacheOperation.Remove:
BuildRemove(method, il);
break;
default:
throw new InvalidOperationException($"{mb.Name}不支持的操作{method.Operation}");
}
il.Emit(OpCodes.Ret);
#if !BuildTask
if (type.IsInterface)
{
proxyType.DefineMethodOverride(mb, method.Method);
}
#endif
BuildParameters(mb.DefineParameter, method.Method.GetParameters());
}
#if BuildTask
return(proxyType);
#elif NETSTANDARD2_0
return(proxyType.CreateTypeInfo() !);
#else
return(proxyType.CreateType() !);
#endif
}
