protected override void Implement(DynamicTypeBuilder config, TypeBuilder typeBuilder, ILGenerator il)
{
var prop = typeof(DynamicObjectBase).GetProperty("DelegateRegister", BindingFlags.NonPublic | BindingFlags.Instance);
var getEnumerator = typeof(IEnumerable <Delegate>).GetMethod("GetEnumerator");
var moveNext = typeof(IEnumerator).GetMethod("MoveNext");
var getCurrent = typeof(IEnumerator <Delegate>).GetProperty("Current").GetGetMethod();
var getoraddMethod = typeof(ConcurrentDictionary <string, List <Delegate> >).GetMethod("GetOrAdd", new[] { typeof(string), typeof(List <Delegate>) });
var subscribed = il.DeclareLocal(typeof(List <Delegate>));
var enumerator = il.DeclareLocal(typeof(IEnumerator <Delegate>));
il.Emit(OpCodes.Ldarg_0);
il.EmitCall(OpCodes.Callvirt, prop.GetGetMethod(true), null);
il.Emit(OpCodes.Ldstr, this.MemberName);
il.Emit(OpCodes.Newobj, typeof(List <Delegate>).GetConstructor(new Type[] { }));
il.EmitCall(OpCodes.Callvirt, getoraddMethod, null);
il.Emit(OpCodes.Stloc_S, subscribed);
il.Emit(OpCodes.Ldloc_S, subscribed);
il.EmitCall(OpCodes.Callvirt, getEnumerator, null);
il.Emit(OpCodes.Stloc_S, enumerator);
var exitLabel = il.DefineLabel();
var loopStart = il.DefineLabel();
il.MarkLabel(loopStart);
il.Emit(OpCodes.Ldloc_S, enumerator);
il.EmitCall(OpCodes.Callvirt, moveNext, null);
il.Emit(OpCodes.Brfalse, exitLabel);
var arg = this.ArgumentTypes.FirstOrDefault();
var actionType = typeof(Action);
if (arg != null)
{
actionType = typeof(Action <>).MakeGenericType(arg);
}
il.Emit(OpCodes.Ldloc_S, enumerator);
il.EmitCall(OpCodes.Callvirt, getCurrent, null);
il.Emit(OpCodes.Castclass, actionType);
if (arg != null)
{
il.Emit(OpCodes.Ldarg_1);
}
il.EmitCall(OpCodes.Callvirt, actionType.GetMethod("Invoke"), null);
il.Emit(OpCodes.Br_S, loopStart);
il.MarkLabel(exitLabel);
il.Emit(OpCodes.Ret);
}
public override void Implement(DynamicTypeBuilder config, TypeBuilder typeBuilder)
{
var addMethodIL = AddMethod.GetILGenerator();
GenerateHandlerMethods(BackingField, addMethodIL, true);
var removeMethodIL = RemoveMethod.GetILGenerator();
GenerateHandlerMethods(BackingField, removeMethodIL, false);
}
public override void Implement(DynamicTypeBuilder config, System.Reflection.Emit.TypeBuilder typeBuilder)
{
var il = this.AddMethod.GetILGenerator();
ProxyMethodHelper.GenerateBody(il, this._implementation.PropertyGetMethod, this._baseEvent.GetAddMethod());
var il2 = this.RemoveMethod.GetILGenerator();
ProxyMethodHelper.GenerateBody(il2, this._implementation.PropertyGetMethod, this._baseEvent.GetRemoveMethod());
}
public override void Implement(DynamicTypeBuilder config, System.Reflection.Emit.TypeBuilder typeBuilder)
{
var il = this.PropertyGetMethod.GetILGenerator();
ProxyMethodHelper.GenerateBody(il, this._implementation.PropertyGetMethod, this._baseProperty.GetGetMethod());
if (!this.IsReadOnly)
{
var il2 = this.PropertySetMethod.GetILGenerator();
ProxyMethodHelper.GenerateBody(il2, this._implementation.PropertyGetMethod, this._baseProperty.GetSetMethod());
}
}
public override void Implement(DynamicTypeBuilder config, TypeBuilder typeBuilder)
{
// GET method il
var baseProperty = typeBuilder.BaseType.GetProperty(this.MemberName);
var getMethodIlGenerator = PropertyGetMethod.GetILGenerator();
if (HasBase)
{
getMethodIlGenerator.Emit(OpCodes.Ldarg_0);
getMethodIlGenerator.Emit(OpCodes.Call, baseProperty.GetGetMethod());
getMethodIlGenerator.Emit(OpCodes.Ret);
}
else
{
getMethodIlGenerator.Emit(OpCodes.Ldarg_0);
getMethodIlGenerator.Emit(OpCodes.Ldfld, this.BackingField);
getMethodIlGenerator.Emit(OpCodes.Ret);
}
// SET method il
if (!IsReadOnly)
{
var setMethodIlGenerator = PropertySetMethod.GetILGenerator();
Label returnLabel;
Label originalReturn = returnLabel = setMethodIlGenerator.DefineLabel();
foreach (var interceptor in this.SetInterceptors)
{
interceptor.Intercept(this, PropertySetMethod, setMethodIlGenerator, ref returnLabel);
}
if (HasBase)
{
setMethodIlGenerator.Emit(OpCodes.Ldarg_0);
setMethodIlGenerator.Emit(OpCodes.Ldarg_1);
setMethodIlGenerator.Emit(OpCodes.Call, baseProperty.GetSetMethod());
}
else
{
setMethodIlGenerator.Emit(OpCodes.Ldarg_0);
setMethodIlGenerator.Emit(OpCodes.Ldarg_1);
setMethodIlGenerator.Emit(OpCodes.Stfld, BackingField);
}
setMethodIlGenerator.Emit(OpCodes.Br_S, returnLabel);
setMethodIlGenerator.MarkLabel(originalReturn);
setMethodIlGenerator.Emit(OpCodes.Ret);
}
}
public abstract void Implement(DynamicTypeBuilder config, TypeBuilder typeBuilder);
public override void Implement(DynamicTypeBuilder config, System.Reflection.Emit.TypeBuilder typeBuilder)
{
}
protected abstract void Implement(DynamicTypeBuilder config, TypeBuilder typeBuilder, ILGenerator il);
public override sealed void Implement(DynamicTypeBuilder config, TypeBuilder typeBuilder)
{
Implement(config, typeBuilder, ImplementationMethod.GetILGenerator());
var il = this.Method.GetILGenerator();
var parameterArrayVar = il.DeclareLocal(typeof(object[]));
bool isAsync = false;
if (this.MemberType != null && typeof(Task).IsAssignableFrom(TypeLookup(this.MemberType)))
{
isAsync = true;
}
var ctxType = isAsync ? typeof(AsyncInterceptionContext) : typeof(InterceptionContext);
var ctxVar = il.DeclareLocal(ctxType);
var interceptionContextCtor = ctxType.GetConstructors().First();
ConstructorInfo delegateCtor = null;
if (this.MemberType == null)
{
Assembly assembly = null;
if (this.ArgumentTypes.Count < 9)
{
assembly = typeof(Action).GetTypeInfo().Assembly;
}
else
{
assembly = typeof(Enumerable).GetTypeInfo().Assembly;
}
var type = GetActionType(this._argumentTypes.Count);
delegateCtor = type.GetConstructor(new[] { typeof(object), typeof(IntPtr) });
if (_argumentTypes.Count > 0)
{
type = type.MakeGenericType(TypeLookup(this.ArgumentTypes).ToArray());
}
if (this._argumentTypes.OfType <GenericType>().Any())
{
delegateCtor = TypeBuilder.GetConstructor(type, delegateCtor);
}
else
{
delegateCtor = type.GetConstructor(new[] { typeof(object), typeof(IntPtr) });
}
}
else
{
var type = GetFuncType(this.ArgumentTypes.Count + 1);
delegateCtor = type.GetConstructor(new[] { typeof(object), typeof(IntPtr) });
type = type.MakeGenericType(TypeLookup(this.ArgumentTypes).Concat(new[] { TypeLookup(this.MemberType) }).ToArray());
if (this._argumentTypes.OfType <GenericType>().Any() || this.MemberType is GenericType)
{
delegateCtor = TypeBuilder.GetConstructor(type, delegateCtor);
}
else
{
delegateCtor = type.GetConstructor(new[] { typeof(object), typeof(IntPtr) });
}
}
var returnLabel = il.DefineLabel();
il.Emit(OpCodes.Ldc_I4, this.ArgumentTypes.Count);
il.Emit(OpCodes.Newarr, typeof(object));
il.Emit(OpCodes.Stloc, parameterArrayVar);
for (int i = 1; i <= this.ArgumentTypes.Count; i++)
{
il.Emit(OpCodes.Ldloc, parameterArrayVar);
il.Emit(OpCodes.Ldc_I4, i - 1);
il.Emit(OpCodes.Ldarg, i);
var type = TypeLookup(this._argumentTypes[i - 1]);
il.Emit(OpCodes.Box, type);
il.Emit(OpCodes.Stelem_Ref);
}
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldstr, this.MemberName);
il.Emit(OpCodes.Ldarg_0);
if (this.ImplementationMethod.IsGenericMethod)
{
il.Emit(OpCodes.Ldftn, this.ImplementationMethod.MakeGenericMethod(this.GenericParameters.Select(p => p.AsType()).ToArray()));
}
else
{
il.Emit(OpCodes.Ldftn, this.ImplementationMethod);
}
il.Emit(OpCodes.Newobj, delegateCtor);
il.Emit(OpCodes.Ldloc, parameterArrayVar);
il.Emit(OpCodes.Newobj, interceptionContextCtor);
il.Emit(OpCodes.Stloc, ctxVar);
List <MethodInfo> interceptors = new List <MethodInfo>();
if (isAsync)
{
interceptors = typeBuilder.BaseType.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
.Where(p => !p.IsPrivate && p.GetCustomAttributes(typeof(MethodInterceptorAttribute), true).Any() && p.GetParameters().Count() == 1 && p.GetParameters().First().ParameterType == typeof(AsyncInterceptionContext) && p.ReturnType == typeof(Task))
.ToList();
}
else
{
interceptors = typeBuilder.BaseType.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
.Where(p => !p.IsPrivate && p.GetCustomAttributes(typeof(MethodInterceptorAttribute), true).Any() && p.GetParameters().Count() == 1 && p.GetParameters().First().ParameterType == typeof(InterceptionContext))
.ToList();
}
var registerMethod = ctxType.GetMethod("RegisterInterceptor");
foreach (var item in interceptors)
{
il.Emit(OpCodes.Ldloc, ctxVar);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldftn, item);
if (isAsync)
{
il.Emit(OpCodes.Newobj, typeof(Func <AsyncInterceptionContext, Task>).GetConstructor(new[] { typeof(object), typeof(IntPtr) }));
}
else
{
il.Emit(OpCodes.Newobj, typeof(Action <InterceptionContext>).GetConstructor(new[] { typeof(object), typeof(IntPtr) }));
}
il.Emit(OpCodes.Ldc_I4, (int)item.GetCustomAttributes(typeof(MethodInterceptorAttribute), true).OfType <MethodInterceptorAttribute>().First().InterceptionMode);
if (isAsync)
{
il.Emit(OpCodes.Newobj, typeof(DelegateAsyncMethodInterceptor).GetConstructors().First());
}
else
{
il.Emit(OpCodes.Newobj, typeof(DelegateMethodInterceptor).GetConstructors().First());
}
il.EmitCall(OpCodes.Callvirt, registerMethod, null);
}
if (isAsync)
{
var taskType = TypeLookup(this.MemberType).GetTypeInfo().IsGenericType ? TypeLookup(this.MemberType).GetGenericArguments().First() : typeof(object);
il.Emit(OpCodes.Ldloc, ctxVar);
il.EmitCall(OpCodes.Callvirt, ctxType.GetMethod("ExecuteAsync").MakeGenericMethod(taskType), null);
}
else
{
il.Emit(OpCodes.Ldloc, ctxVar);
il.EmitCall(OpCodes.Callvirt, typeof(InterceptionContext).GetMethod("Execute"), null);
if (this.MemberType != null)
{
il.Emit(OpCodes.Ldloc, ctxVar);
il.Emit(OpCodes.Callvirt, typeof(InterceptionContext).GetProperty("Result").GetGetMethod());
var returnType = TypeLookup(this.MemberType);
if (returnType.GetTypeInfo().IsValueType || returnType.IsGenericParameter)
{
il.Emit(OpCodes.Unbox_Any, TypeLookup(this.MemberType));
}
else
{
il.Emit(OpCodes.Castclass, returnType);
}
}
}
il.Emit(OpCodes.Ret);
}
