/// <summary>
/// 创建一个代理对象
/// </summary>
/// <param name="handler"></param>
/// <param name="objType"></param>
/// <param name="isObjInterface"></param>
/// <returns></returns>
public Object Create(IProxyInvocationHandler handler, Type objType, bool isObjInterface)
{
if (isObjInterface)
{
return(DynamicProxy.NewInstance(AppDomain.CurrentDomain, new Type[] { objType }, handler));
}
else
{
return(DynamicProxy.NewInstance(AppDomain.CurrentDomain, objType.GetInterfaces(), handler));
}
}
private static MethodBuilder MakeMethod(TypeBuilder typeBuilder, MethodInfo method, Boolean createPublic)
{
Int32 methodNum = DynamicProxy.Register(method);
Type[] paramTypes = ToTypes(method.GetParameters());
Int32 paramNum = paramTypes.Length;
Boolean[] paramsByRef = new Boolean[paramNum];
MethodBuilder b;
String name;
MethodAttributes methodAttr;
if (createPublic)
{
name = method.Name;
methodAttr = MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig;
}
else
{
name = method.DeclaringType.FullName + "." + method.Name;
methodAttr = MethodAttributes.Private | MethodAttributes.Virtual | MethodAttributes.HideBySig | MethodAttributes.NewSlot | MethodAttributes.Final;
}
b = typeBuilder.DefineMethod(name, methodAttr, method.CallingConvention, method.ReturnType, paramTypes);
ILGenerator gen = b.GetILGenerator();
LocalBuilder parameters = gen.DeclareLocal(typeof(Object[]));
LocalBuilder result = gen.DeclareLocal(typeof(Object));
LocalBuilder retval = null;
if (!method.ReturnType.Equals(typeof(void)))
{
retval = gen.DeclareLocal(method.ReturnType);
}
gen.Emit(OpCodes.Ldarg_0);
gen.Emit(OpCodes.Ldfld, FieldInfo_handler); //this.handler
gen.Emit(OpCodes.Ldarg_0);
gen.Emit(OpCodes.Ldc_I4, methodNum);
gen.Emit(OpCodes.Call, MethodInfo_GetMethod);
gen.Emit(OpCodes.Ldc_I4, paramNum);
gen.Emit(OpCodes.Newarr, typeof(Object)); // new Object[]
if (paramNum > 0)
{
gen.Emit(OpCodes.Stloc, parameters);
for (Int32 i = 0; i < paramNum; i++)
{
gen.Emit(OpCodes.Ldloc, parameters);
gen.Emit(OpCodes.Ldc_I4, i);
gen.Emit(OpCodes.Ldarg, i + 1);
if (paramTypes[i].IsByRef)
{
paramTypes[i] = paramTypes[i].GetElementType();
if (paramTypes[i] == typeofInt8 || paramTypes[i] == typeofBoolean)
{
gen.Emit(OpCodes.Ldind_I1);
}
else if (paramTypes[i] == typeofUInt8)
{
gen.Emit(OpCodes.Ldind_U1);
}
else if (paramTypes[i] == typeofInt16)
{
gen.Emit(OpCodes.Ldind_I2);
}
else if (paramTypes[i] == typeofUInt16 || paramTypes[i] == typeofChar)
{
gen.Emit(OpCodes.Ldind_U2);
}
else if (paramTypes[i] == typeofInt32)
{
gen.Emit(OpCodes.Ldind_I4);
}
else if (paramTypes[i] == typeofUInt32)
{
gen.Emit(OpCodes.Ldind_U4);
}
else if (paramTypes[i] == typeofInt64 || paramTypes[i] == typeofUInt64)
{
gen.Emit(OpCodes.Ldind_I8);
}
else if (paramTypes[i] == typeofSingle)
{
gen.Emit(OpCodes.Ldind_R4);
}
else if (paramTypes[i] == typeofDouble)
{
gen.Emit(OpCodes.Ldind_R8);
}
else if (paramTypes[i].IsValueType)
{
gen.Emit(OpCodes.Ldobj, paramTypes[i]);
}
else
{
gen.Emit(OpCodes.Ldind_Ref);
}
paramsByRef[i] = true;
}
else
{
paramsByRef[i] = false;
}
if (paramTypes[i].IsValueType)
{
gen.Emit(OpCodes.Box, paramTypes[i]);
}
gen.Emit(OpCodes.Stelem_Ref);
}
gen.Emit(OpCodes.Ldloc, parameters);
}
// base.Invoke(this, method, parameters);
gen.Emit(OpCodes.Callvirt, DynamicProxy_Invoke);
gen.Emit(OpCodes.Stloc, result);
for (Int32 i = 0; i < paramNum; i++)
{
if (paramsByRef[i])
{
gen.Emit(OpCodes.Ldarg, i + 1);
gen.Emit(OpCodes.Ldloc, parameters);
gen.Emit(OpCodes.Ldc_I4, i);
gen.Emit(OpCodes.Ldelem_Ref);
if (paramTypes[i].IsValueType)
{
#if NET1
gen.Emit(OpCodes.Unbox, paramTypes[i]);
gen.Emit(OpCodes.Ldobj, paramTypes[i]);
#else
gen.Emit(OpCodes.Unbox_Any, paramTypes[i]);
#endif
}
else
{
gen.Emit(OpCodes.Castclass, paramTypes[i]);
}
if (paramTypes[i] == typeofInt8 || paramTypes[i] == typeofUInt8 || paramTypes[i] == typeofBoolean)
{
gen.Emit(OpCodes.Stind_I1);
}
else if (paramTypes[i] == typeofInt16 || paramTypes[i] == typeofUInt16 || paramTypes[i] == typeofChar)
{
gen.Emit(OpCodes.Stind_I2);
}
else if (paramTypes[i] == typeofInt32 || paramTypes[i] == typeofUInt32)
{
gen.Emit(OpCodes.Stind_I4);
}
else if (paramTypes[i] == typeofInt64 || paramTypes[i] == typeofUInt64)
{
gen.Emit(OpCodes.Stind_I8);
}
else if (paramTypes[i] == typeofSingle)
{
gen.Emit(OpCodes.Stind_R4);
}
else if (paramTypes[i] == typeofDouble)
{
gen.Emit(OpCodes.Stind_R8);
}
else if (paramTypes[i].IsValueType)
{
gen.Emit(OpCodes.Stobj, paramTypes[i]);
}
else
{
gen.Emit(OpCodes.Stind_Ref);
}
}
}
if (!method.ReturnType.Equals(typeof(void)))
{
gen.Emit(OpCodes.Ldloc, result);
if (method.ReturnType.IsValueType)
{
#if NET1
gen.Emit(OpCodes.Unbox, method.ReturnType);
gen.Emit(OpCodes.Ldobj, method.ReturnType);
#else
gen.Emit(OpCodes.Unbox_Any, method.ReturnType);
#endif
}
else
{
gen.Emit(OpCodes.Castclass, method.ReturnType);
}
gen.Emit(OpCodes.Stloc_S, retval);
gen.Emit(OpCodes.Ldloc_S, retval);
}
gen.Emit(OpCodes.Ret);
if (!createPublic)
{
typeBuilder.DefineMethodOverride(b, method);
}
return(b);
}
