internal static DynamicMethod CreateSlowBeginMethodDelegate(Type integrationType, Type targetType)
{
/*
* OnMethodBegin signatures with 1 or more parameters with 1 or more generics:
* - CallTargetState OnMethodBegin<TTarget>(TTarget instance);
* - CallTargetState OnMethodBegin<TTarget, TArg1>(TTarget instance, TArg1 arg1);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2>(TTarget instance, TArg1 arg1, TArg2);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2, ...>(TTarget instance, TArg1 arg1, TArg2, ...);
* - CallTargetState OnMethodBegin<TTarget>();
* - CallTargetState OnMethodBegin<TTarget, TArg1>(TArg1 arg1);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2>(TArg1 arg1, TArg2);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2, ...>(TArg1 arg1, TArg2, ...);
*
*/
Logger.Debug($"Creating SlowBeginMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
var onMethodBeginMethodInfo = integrationType.GetMethod(BeginMethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
if (onMethodBeginMethodInfo is null)
{
Logger.Debug($"'{BeginMethodName}' method was not found in integration type: '{integrationType.FullName}'.");
return(null);
}
if (onMethodBeginMethodInfo.ReturnType != typeof(CallTargetState))
{
throw new ArgumentException($"The return type of the method: {BeginMethodName} in type: {integrationType.FullName} is not {nameof(CallTargetState)}");
}
var genericArgumentsTypes = onMethodBeginMethodInfo.GetGenericArguments();
if (genericArgumentsTypes.Length < 1)
{
throw new ArgumentException($"The method: {BeginMethodName} in type: {integrationType.FullName} doesn't have the generic type for the instance type.");
}
var onMethodBeginParameters = onMethodBeginMethodInfo.GetParameters();
var callGenericTypes = new List <Type>();
var mustLoadInstance = onMethodBeginParameters[0].ParameterType.IsGenericParameter && onMethodBeginParameters[0].ParameterType.GenericParameterPosition == 0;
var instanceGenericType = genericArgumentsTypes[0];
var instanceGenericConstraint = instanceGenericType.GetGenericParameterConstraints().FirstOrDefault();
Type instanceProxyType = null;
if (instanceGenericConstraint != null)
{
var result = DuckType.GetOrCreateProxyType(instanceGenericConstraint, targetType);
instanceProxyType = result.ProxyType;
callGenericTypes.Add(instanceProxyType);
}
else
{
callGenericTypes.Add(targetType);
}
var callMethod = new DynamicMethod(
$"{onMethodBeginMethodInfo.DeclaringType.Name}.{onMethodBeginMethodInfo.Name}",
typeof(CallTargetState),
new Type[] { targetType, typeof(object[]) },
onMethodBeginMethodInfo.Module,
true);
var ilWriter = callMethod.GetILGenerator();
// Load the instance if is needed
if (mustLoadInstance)
{
ilWriter.Emit(OpCodes.Ldarg_0);
if (instanceGenericConstraint != null)
{
WriteCreateNewProxyInstance(ilWriter, instanceProxyType, targetType);
}
}
// Load arguments
for (var i = mustLoadInstance ? 1 : 0; i < onMethodBeginParameters.Length; i++)
{
var targetParameterType = onMethodBeginParameters[i].ParameterType;
Type targetParameterTypeConstraint = null;
if (targetParameterType.IsGenericParameter)
{
targetParameterType = genericArgumentsTypes[targetParameterType.GenericParameterPosition];
targetParameterTypeConstraint = targetParameterType.GetGenericParameterConstraints().FirstOrDefault(pType => pType != typeof(IDuckType));
if (targetParameterTypeConstraint is null)
{
callGenericTypes.Add(typeof(object));
}
else
{
targetParameterType = targetParameterTypeConstraint;
callGenericTypes.Add(targetParameterTypeConstraint);
}
}
ilWriter.Emit(OpCodes.Ldarg_1);
WriteIntValue(ilWriter, i - (mustLoadInstance ? 1 : 0));
ilWriter.Emit(OpCodes.Ldelem_Ref);
if (targetParameterTypeConstraint != null)
{
ilWriter.EmitCall(OpCodes.Call, ConvertTypeMethodInfo.MakeGenericMethod(targetParameterTypeConstraint), null);
}
else if (targetParameterType.IsValueType)
{
ilWriter.Emit(OpCodes.Unbox_Any, targetParameterType);
}
}
// Call method
onMethodBeginMethodInfo = onMethodBeginMethodInfo.MakeGenericMethod(callGenericTypes.ToArray());
ilWriter.EmitCall(OpCodes.Call, onMethodBeginMethodInfo, null);
ilWriter.Emit(OpCodes.Ret);
Logger.Debug($"Created SlowBeginMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
return(callMethod);
}
internal static DynamicMethod CreateBeginMethodDelegate(Type integrationType, Type targetType, Type[] argumentsTypes)
{
/*
* OnMethodBegin signatures with 1 or more parameters with 1 or more generics:
* - CallTargetState OnMethodBegin<TTarget>(TTarget instance);
* - CallTargetState OnMethodBegin<TTarget, TArg1>(TTarget instance, TArg1 arg1);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2>(TTarget instance, TArg1 arg1, TArg2);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2, ...>(TTarget instance, TArg1 arg1, TArg2, ...);
* - CallTargetState OnMethodBegin<TTarget>();
* - CallTargetState OnMethodBegin<TTarget, TArg1>(TArg1 arg1);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2>(TArg1 arg1, TArg2);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2, ...>(TArg1 arg1, TArg2, ...);
*
*/
Log.Debug($"Creating BeginMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
MethodInfo onMethodBeginMethodInfo = integrationType.GetMethod(BeginMethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
if (onMethodBeginMethodInfo is null)
{
Log.Debug($"'{BeginMethodName}' method was not found in integration type: '{integrationType.FullName}'.");
return(null);
}
if (onMethodBeginMethodInfo.ReturnType != typeof(CallTargetState))
{
ThrowHelper.ThrowArgumentException($"The return type of the method: {BeginMethodName} in type: {integrationType.FullName} is not {nameof(CallTargetState)}");
}
Type[] genericArgumentsTypes = onMethodBeginMethodInfo.GetGenericArguments();
if (genericArgumentsTypes.Length < 1)
{
ThrowHelper.ThrowArgumentException($"The method: {BeginMethodName} in type: {integrationType.FullName} doesn't have the generic type for the instance type.");
}
ParameterInfo[] onMethodBeginParameters = onMethodBeginMethodInfo.GetParameters();
if (onMethodBeginParameters.Length < argumentsTypes.Length)
{
ThrowHelper.ThrowArgumentException($"The method: {BeginMethodName} with {onMethodBeginParameters.Length} parameters in type: {integrationType.FullName} has less parameters than required.");
}
else if (onMethodBeginParameters.Length > argumentsTypes.Length + 1)
{
ThrowHelper.ThrowArgumentException($"The method: {BeginMethodName} with {onMethodBeginParameters.Length} parameters in type: {integrationType.FullName} has more parameters than required.");
}
else if (onMethodBeginParameters.Length != argumentsTypes.Length && onMethodBeginParameters[0].ParameterType != genericArgumentsTypes[0])
{
ThrowHelper.ThrowArgumentException($"The first generic argument for method: {BeginMethodName} in type: {integrationType.FullName} must be the same as the first parameter for the instance value.");
}
List <Type> callGenericTypes = new List <Type>();
bool mustLoadInstance = onMethodBeginParameters.Length != argumentsTypes.Length;
Type instanceGenericType = genericArgumentsTypes[0];
Type instanceGenericConstraint = instanceGenericType.GetGenericParameterConstraints().FirstOrDefault();
Type instanceProxyType = null;
if (instanceGenericConstraint != null)
{
var result = DuckType.GetOrCreateProxyType(instanceGenericConstraint, targetType);
instanceProxyType = result.ProxyType;
callGenericTypes.Add(instanceProxyType);
}
else
{
callGenericTypes.Add(targetType);
}
DynamicMethod callMethod = new DynamicMethod(
$"{onMethodBeginMethodInfo.DeclaringType.Name}.{onMethodBeginMethodInfo.Name}",
typeof(CallTargetState),
new Type[] { targetType }.Concat(argumentsTypes),
onMethodBeginMethodInfo.Module,
true);
ILGenerator ilWriter = callMethod.GetILGenerator();
// Load the instance if is needed
if (mustLoadInstance)
{
ilWriter.Emit(OpCodes.Ldarg_0);
if (instanceGenericConstraint != null)
{
WriteCreateNewProxyInstance(ilWriter, instanceProxyType, targetType);
}
}
// Load arguments
for (var i = mustLoadInstance ? 1 : 0; i < onMethodBeginParameters.Length; i++)
{
Type sourceParameterType = argumentsTypes[mustLoadInstance ? i - 1 : i];
Type targetParameterType = onMethodBeginParameters[i].ParameterType;
Type targetParameterTypeConstraint = null;
Type parameterProxyType = null;
if (targetParameterType.IsGenericParameter)
{
targetParameterType = genericArgumentsTypes[targetParameterType.GenericParameterPosition];
targetParameterTypeConstraint = targetParameterType.GetGenericParameterConstraints().FirstOrDefault(pType => pType != typeof(IDuckType));
if (targetParameterTypeConstraint is null)
{
callGenericTypes.Add(sourceParameterType.GetElementType());
}
else
{
var result = DuckType.GetOrCreateProxyType(targetParameterTypeConstraint, sourceParameterType.GetElementType());
parameterProxyType = result.ProxyType;
callGenericTypes.Add(parameterProxyType);
}
}
else if (targetParameterType.IsByRef && targetParameterType.GetElementType() is { IsGenericParameter: true } elementType)
{
// ByRef generic parameters needs to be unwrapped before accessing the `IsGenericParameter` property.
var genTargetParameterType = genericArgumentsTypes[elementType.GenericParameterPosition];
targetParameterTypeConstraint = genTargetParameterType.GetGenericParameterConstraints().FirstOrDefault(pType => pType != typeof(IDuckType));
if (targetParameterTypeConstraint is null)
{
callGenericTypes.Add(sourceParameterType.GetElementType());
}
else
{
ThrowHelper.ThrowInvalidCastException($"DuckType constraints cannot be used in ByRef arguments. ({targetParameterTypeConstraint})");
}
}
internal static DynamicMethod CreateEndMethodDelegate(Type integrationType, Type targetType)
{
/*
* OnMethodEnd signatures with 2 or 3 parameters with 1 generics:
* - CallTargetReturn OnMethodEnd<TTarget>(TTarget instance, Exception exception, CallTargetState state);
* - CallTargetReturn OnMethodEnd<TTarget>(Exception exception, CallTargetState state);
*
*/
Log.Debug($"Creating EndMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
MethodInfo onMethodEndMethodInfo = integrationType.GetMethod(EndMethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
if (onMethodEndMethodInfo is null)
{
return(null);
}
if (onMethodEndMethodInfo.ReturnType != typeof(CallTargetReturn))
{
throw new ArgumentException($"The return type of the method: {EndMethodName} in type: {integrationType.FullName} is not {nameof(CallTargetReturn)}");
}
Type[] genericArgumentsTypes = onMethodEndMethodInfo.GetGenericArguments();
if (genericArgumentsTypes.Length != 1)
{
throw new ArgumentException($"The method: {EndMethodName} in type: {integrationType.FullName} must have a single generic type for the instance type.");
}
ParameterInfo[] onMethodEndParameters = onMethodEndMethodInfo.GetParameters();
if (onMethodEndParameters.Length < 2)
{
throw new ArgumentException($"The method: {EndMethodName} with {onMethodEndParameters.Length} parameters in type: {integrationType.FullName} has less parameters than required.");
}
else if (onMethodEndParameters.Length > 3)
{
throw new ArgumentException($"The method: {EndMethodName} with {onMethodEndParameters.Length} parameters in type: {integrationType.FullName} has more parameters than required.");
}
if (onMethodEndParameters[onMethodEndParameters.Length - 2].ParameterType != typeof(Exception))
{
throw new ArgumentException($"The Exception type parameter of the method: {EndMethodName} in type: {integrationType.FullName} is missing.");
}
if (onMethodEndParameters[onMethodEndParameters.Length - 1].ParameterType != typeof(CallTargetState))
{
throw new ArgumentException($"The CallTargetState type parameter of the method: {EndMethodName} in type: {integrationType.FullName} is missing.");
}
List <Type> callGenericTypes = new List <Type>();
bool mustLoadInstance = onMethodEndParameters.Length == 3;
Type instanceGenericType = genericArgumentsTypes[0];
Type instanceGenericConstraint = instanceGenericType.GetGenericParameterConstraints().FirstOrDefault();
Type instanceProxyType = null;
if (instanceGenericConstraint != null)
{
var result = DuckType.GetOrCreateProxyType(instanceGenericConstraint, targetType);
instanceProxyType = result.ProxyType;
callGenericTypes.Add(instanceProxyType);
}
else
{
callGenericTypes.Add(targetType);
}
DynamicMethod callMethod = new DynamicMethod(
$"{onMethodEndMethodInfo.DeclaringType.Name}.{onMethodEndMethodInfo.Name}",
typeof(CallTargetReturn),
new Type[] { targetType, typeof(Exception), typeof(CallTargetState) },
onMethodEndMethodInfo.Module,
true);
ILGenerator ilWriter = callMethod.GetILGenerator();
// Load the instance if is needed
if (mustLoadInstance)
{
ilWriter.Emit(OpCodes.Ldarg_0);
if (instanceGenericConstraint != null)
{
WriteCreateNewProxyInstance(ilWriter, instanceProxyType, targetType);
}
}
// Load the exception
ilWriter.Emit(OpCodes.Ldarg_1);
// Load the state
ilWriter.Emit(OpCodes.Ldarg_2);
// Call Method
onMethodEndMethodInfo = onMethodEndMethodInfo.MakeGenericMethod(callGenericTypes.ToArray());
ilWriter.EmitCall(OpCodes.Call, onMethodEndMethodInfo, null);
ilWriter.Emit(OpCodes.Ret);
Log.Debug($"Created EndMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
return(callMethod);
}
internal static DynamicMethod CreateAsyncEndMethodDelegate(Type integrationType, Type targetType, Type returnType)
{
/*
* OnAsyncMethodEnd signatures with 3 or 4 parameters with 1 or 2 generics:
* - TReturn OnAsyncMethodEnd<TTarget, TReturn>(TTarget instance, TReturn returnValue, Exception exception, CallTargetState state);
* - TReturn OnAsyncMethodEnd<TTarget, TReturn>(TReturn returnValue, Exception exception, CallTargetState state);
* - [Type] OnAsyncMethodEnd<TTarget>([Type] returnValue, Exception exception, CallTargetState state);
*
* In case the continuation is for a Task/ValueTask, the returnValue type will be an object and the value null.
* In case the continuation is for a Task<T>/ValueTask<T>, the returnValue type will be T with the instance value after the task completes.
*
*/
Log.Debug($"Creating AsyncEndMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}, ReturnType={returnType.FullName}]");
MethodInfo onAsyncMethodEndMethodInfo = integrationType.GetMethod(EndAsyncMethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
if (onAsyncMethodEndMethodInfo is null)
{
Log.Warning($"Couldn't find the method: {EndAsyncMethodName} in type: {integrationType.FullName}");
return(null);
}
if (!onAsyncMethodEndMethodInfo.ReturnType.IsGenericParameter && onAsyncMethodEndMethodInfo.ReturnType != returnType)
{
throw new ArgumentException($"The return type of the method: {EndAsyncMethodName} in type: {integrationType.FullName} is not {returnType}");
}
Type[] genericArgumentsTypes = onAsyncMethodEndMethodInfo.GetGenericArguments();
if (genericArgumentsTypes.Length < 1 || genericArgumentsTypes.Length > 2)
{
throw new ArgumentException($"The method: {EndAsyncMethodName} in type: {integrationType.FullName} must have the generic type for the instance type.");
}
ParameterInfo[] onAsyncMethodEndParameters = onAsyncMethodEndMethodInfo.GetParameters();
if (onAsyncMethodEndParameters.Length < 3)
{
throw new ArgumentException($"The method: {EndAsyncMethodName} with {onAsyncMethodEndParameters.Length} parameters in type: {integrationType.FullName} has less parameters than required.");
}
else if (onAsyncMethodEndParameters.Length > 4)
{
throw new ArgumentException($"The method: {EndAsyncMethodName} with {onAsyncMethodEndParameters.Length} parameters in type: {integrationType.FullName} has more parameters than required.");
}
if (onAsyncMethodEndParameters[onAsyncMethodEndParameters.Length - 2].ParameterType != typeof(Exception))
{
throw new ArgumentException($"The Exception type parameter of the method: {EndAsyncMethodName} in type: {integrationType.FullName} is missing.");
}
if (onAsyncMethodEndParameters[onAsyncMethodEndParameters.Length - 1].ParameterType != typeof(CallTargetState))
{
throw new ArgumentException($"The CallTargetState type parameter of the method: {EndAsyncMethodName} in type: {integrationType.FullName} is missing.");
}
List <Type> callGenericTypes = new List <Type>();
bool mustLoadInstance = onAsyncMethodEndParameters.Length == 4;
Type instanceGenericType = genericArgumentsTypes[0];
Type instanceGenericConstraint = instanceGenericType.GetGenericParameterConstraints().FirstOrDefault();
Type instanceProxyType = null;
if (instanceGenericConstraint != null)
{
var result = DuckType.GetOrCreateProxyType(instanceGenericConstraint, targetType);
instanceProxyType = result.ProxyType;
callGenericTypes.Add(instanceProxyType);
}
else
{
callGenericTypes.Add(targetType);
}
int returnParameterIndex = onAsyncMethodEndParameters.Length == 4 ? 1 : 0;
bool isAGenericReturnValue = onAsyncMethodEndParameters[returnParameterIndex].ParameterType.IsGenericParameter;
Type returnValueGenericType = null;
Type returnValueGenericConstraint = null;
Type returnValueProxyType = null;
if (isAGenericReturnValue)
{
returnValueGenericType = genericArgumentsTypes[1];
returnValueGenericConstraint = returnValueGenericType.GetGenericParameterConstraints().FirstOrDefault();
if (returnValueGenericConstraint != null)
{
var result = DuckType.GetOrCreateProxyType(returnValueGenericConstraint, returnType);
returnValueProxyType = result.ProxyType;
callGenericTypes.Add(returnValueProxyType);
}
else
{
callGenericTypes.Add(returnType);
}
}
else if (onAsyncMethodEndParameters[returnParameterIndex].ParameterType != returnType)
{
throw new ArgumentException($"The ReturnValue type parameter of the method: {EndAsyncMethodName} in type: {integrationType.FullName} is invalid. [{onAsyncMethodEndParameters[returnParameterIndex].ParameterType} != {returnType}]");
}
DynamicMethod callMethod = new DynamicMethod(
$"{onAsyncMethodEndMethodInfo.DeclaringType.Name}.{onAsyncMethodEndMethodInfo.Name}.{targetType.Name}.{returnType.Name}",
returnType,
new Type[] { targetType, returnType, typeof(Exception), typeof(CallTargetState) },
onAsyncMethodEndMethodInfo.Module,
true);
ILGenerator ilWriter = callMethod.GetILGenerator();
// Load the instance if is needed
if (mustLoadInstance)
{
ilWriter.Emit(OpCodes.Ldarg_0);
if (instanceGenericConstraint != null)
{
WriteCreateNewProxyInstance(ilWriter, instanceProxyType, targetType);
}
}
// Load the return value
ilWriter.Emit(OpCodes.Ldarg_1);
if (returnValueProxyType != null)
{
WriteCreateNewProxyInstance(ilWriter, returnValueProxyType, returnType);
}
// Load the exception
ilWriter.Emit(OpCodes.Ldarg_2);
// Load the state
ilWriter.Emit(OpCodes.Ldarg_3);
// Call Method
onAsyncMethodEndMethodInfo = onAsyncMethodEndMethodInfo.MakeGenericMethod(callGenericTypes.ToArray());
ilWriter.EmitCall(OpCodes.Call, onAsyncMethodEndMethodInfo, null);
// Unwrap return value proxy
if (returnValueProxyType != null)
{
MethodInfo unwrapReturnValue = UnwrapReturnValueMethodInfo.MakeGenericMethod(returnValueProxyType, returnType);
ilWriter.EmitCall(OpCodes.Call, unwrapReturnValue, null);
}
ilWriter.Emit(OpCodes.Ret);
Log.Debug($"Created AsyncEndMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}, ReturnType={returnType.FullName}]");
return(callMethod);
}
internal static DynamicMethod CreateBeginMethodDelegate(Type integrationType, Type targetType, Type[] argumentsTypes)
{
/*
* OnMethodBegin signatures with 1 or more parameters with 1 or more generics:
* - CallTargetState OnMethodBegin<TTarget>(TTarget instance);
* - CallTargetState OnMethodBegin<TTarget, TArg1>(TTarget instance, TArg1 arg1);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2>(TTarget instance, TArg1 arg1, TArg2);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2, ...>(TTarget instance, TArg1 arg1, TArg2, ...);
* - CallTargetState OnMethodBegin<TTarget>();
* - CallTargetState OnMethodBegin<TTarget, TArg1>(TArg1 arg1);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2>(TArg1 arg1, TArg2);
* - CallTargetState OnMethodBegin<TTarget, TArg1, TArg2, ...>(TArg1 arg1, TArg2, ...);
*
*/
Log.Debug($"Creating BeginMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
MethodInfo onMethodBeginMethodInfo = integrationType.GetMethod(BeginMethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
if (onMethodBeginMethodInfo is null)
{
throw new NullReferenceException($"Couldn't find the method: {BeginMethodName} in type: {integrationType.FullName}");
}
if (onMethodBeginMethodInfo.ReturnType != typeof(CallTargetState))
{
throw new ArgumentException($"The return type of the method: {BeginMethodName} in type: {integrationType.FullName} is not {nameof(CallTargetState)}");
}
Type[] genericArgumentsTypes = onMethodBeginMethodInfo.GetGenericArguments();
if (genericArgumentsTypes.Length < 1)
{
throw new ArgumentException($"The method: {BeginMethodName} in type: {integrationType.FullName} doesn't have the generic type for the instance type.");
}
ParameterInfo[] onMethodBeginParameters = onMethodBeginMethodInfo.GetParameters();
if (onMethodBeginParameters.Length < argumentsTypes.Length)
{
throw new ArgumentException($"The method: {BeginMethodName} with {onMethodBeginParameters.Length} parameters in type: {integrationType.FullName} has less parameters than required.");
}
else if (onMethodBeginParameters.Length > argumentsTypes.Length + 1)
{
throw new ArgumentException($"The method: {BeginMethodName} with {onMethodBeginParameters.Length} parameters in type: {integrationType.FullName} has more parameters than required.");
}
else if (onMethodBeginParameters.Length != argumentsTypes.Length && onMethodBeginParameters[0].ParameterType != genericArgumentsTypes[0])
{
throw new ArgumentException($"The first generic argument for method: {BeginMethodName} in type: {integrationType.FullName} must be the same as the first parameter for the instance value.");
}
List <Type> callGenericTypes = new List <Type>();
bool mustLoadInstance = onMethodBeginParameters.Length != argumentsTypes.Length;
Type instanceGenericType = genericArgumentsTypes[0];
Type instanceGenericConstraint = instanceGenericType.GetGenericParameterConstraints().FirstOrDefault();
Type instanceProxyType = null;
if (instanceGenericConstraint != null)
{
var result = DuckType.GetOrCreateProxyType(instanceGenericConstraint, targetType);
instanceProxyType = result.ProxyType;
callGenericTypes.Add(instanceProxyType);
}
else
{
callGenericTypes.Add(targetType);
}
DynamicMethod callMethod = new DynamicMethod(
$"{onMethodBeginMethodInfo.DeclaringType.Name}.{onMethodBeginMethodInfo.Name}",
typeof(CallTargetState),
new Type[] { targetType }.Concat(argumentsTypes),
onMethodBeginMethodInfo.Module,
true);
ILGenerator ilWriter = callMethod.GetILGenerator();
// Load the instance if is needed
if (mustLoadInstance)
{
ilWriter.Emit(OpCodes.Ldarg_0);
if (instanceGenericConstraint != null)
{
WriteCreateNewProxyInstance(ilWriter, instanceProxyType, targetType);
}
}
// Load arguments
for (var i = mustLoadInstance ? 1 : 0; i < onMethodBeginParameters.Length; i++)
{
Type sourceParameterType = argumentsTypes[mustLoadInstance ? i - 1 : i];
Type targetParameterType = onMethodBeginParameters[i].ParameterType;
Type targetParameterTypeConstraint = null;
Type parameterProxyType = null;
if (targetParameterType.IsGenericParameter)
{
targetParameterType = genericArgumentsTypes[targetParameterType.GenericParameterPosition];
targetParameterTypeConstraint = targetParameterType.GetGenericParameterConstraints().FirstOrDefault(pType => pType != typeof(IDuckType));
if (targetParameterTypeConstraint is null)
{
callGenericTypes.Add(sourceParameterType);
}
else
{
var result = DuckType.GetOrCreateProxyType(targetParameterTypeConstraint, sourceParameterType);
parameterProxyType = result.ProxyType;
callGenericTypes.Add(parameterProxyType);
}
}
else if (!targetParameterType.IsAssignableFrom(sourceParameterType) && (!(sourceParameterType.IsEnum && targetParameterType.IsEnum)))
{
throw new InvalidCastException($"The target parameter {targetParameterType} can't be assigned from {sourceParameterType}");
}
WriteLoadArgument(ilWriter, i, mustLoadInstance);
if (parameterProxyType != null)
{
WriteCreateNewProxyInstance(ilWriter, parameterProxyType, sourceParameterType);
}
}
// Call method
onMethodBeginMethodInfo = onMethodBeginMethodInfo.MakeGenericMethod(callGenericTypes.ToArray());
ilWriter.EmitCall(OpCodes.Call, onMethodBeginMethodInfo, null);
ilWriter.Emit(OpCodes.Ret);
Log.Debug($"Created BeginMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
return(callMethod);
}
