public static Delegate CreateOnShouldListenToDelegate(Type activitySourceType, MethodInfo onShouldListenToMethodInfo)
{
var dynMethod = new DynamicMethod(
"OnShouldListenToDyn",
typeof(bool),
new[] { activitySourceType },
typeof(ActivityListener).Module,
true);
var proxyResult = DuckType.GetOrCreateProxyType(typeof(IActivitySource), activitySourceType);
var proxyType = proxyResult.ProxyType;
if (proxyType is null)
{
ThrowHelper.ThrowNullReferenceException($"Resulting proxy type after ducktyping {activitySourceType} is null");
}
var method = onShouldListenToMethodInfo.MakeGenericMethod(proxyType);
var proxyTypeCtor = proxyType.GetConstructors()[0];
var il = dynMethod.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Newobj, proxyTypeCtor);
il.EmitCall(OpCodes.Call, method, null);
il.Emit(OpCodes.Ret);
return(dynMethod.CreateDelegate(typeof(Func <,>).MakeGenericType(activitySourceType, typeof(bool))));
}
static void Main(string[] args)
{
dynamic person = new { Name = "Peter" };
var p = DuckType.As <IPerson>(person);
Console.WriteLine(p.Name);
}
public int SubtractFromNumToSpawn(int num, DuckType unit)
{
num--;
if (num <= 0)
{
if (unit == type[0])
{
typeTemp.RemoveAt(0);
}
if (unit == type[1])
{
typeTemp.RemoveAt(1);
}
if (unit == type[2])
{
typeTemp.RemoveAt(2);
}
}
if (typeTemp.Count == 0)
{
CancelInvoke("SpawnObject");
}
return(num);
}
public static MappedDiagnosticsContextSetterProxy GetMdcProxy(Assembly nlogAssembly)
{
var mdcType = nlogAssembly.GetType("NLog.MappedDiagnosticsContext");
if (mdcType is not null)
{
// NLog 2.0+
var createTypeResult = DuckType.GetOrCreateProxyType(typeof(MappedDiagnosticsContextSetterProxy), mdcType);
if (createTypeResult.Success)
{
return(createTypeResult.CreateInstance <MappedDiagnosticsContextSetterProxy>(instance: null));
}
}
mdcType = nlogAssembly.GetType("NLog.MDC");
if (mdcType is not null)
{
// NLog 1.0+
var createTypeResult = DuckType.GetOrCreateProxyType(typeof(MappedDiagnosticsContextSetterProxy), mdcType);
if (createTypeResult.Success)
{
return(createTypeResult.CreateInstance <MappedDiagnosticsContextSetterProxy>(instance: null));
}
}
return(null);
}
public void Initialize()
{
Baz baz = new Baz();
foo = DuckType.Cast <Foo>(baz);
Assert.AreNotSame(baz, foo);
}
[Ignore] //Manual test
public void As_Loop()
{
foreach (object obj in GetObjects())
{
Assert.IsNotNull(DuckType.As <IHasValue>(obj).Value);
}
}
public void CastToImplementedType()
{
Baz baz = new Baz();
Foo foo = DuckType.Cast <Foo>(baz);
Assert.AreSame(baz, foo);
foo.Bar();
}
public IQuackable getDuck(DuckType duckType)
{
if (DuckDictionary.ContainsKey(duckType))
{
return DuckDictionary[duckType];
}
else return null;
}
public void EmptyMethodNoReturnType()
{
Baz baz = new Baz();
Foo foo = DuckType.Cast <Foo>(baz);
Assert.AreNotSame(baz, foo);
foo.Bar();
}
public void As_Invalid()
{
string expected = Guid.NewGuid().ToString();
BespokeString bespoke = new BespokeString(expected);
Assert.IsNotInstanceOfType(bespoke, typeof(IHasValue));
IHasValue duck = DuckType.As <IHasValue>(bespoke);
Assert.IsNull(duck);
}
public void OverloadTestSameReturnTypes()
{
Baz baz = new Baz();
Quux foo = DuckType.Cast <Quux>(baz);
Assert.AreNotSame(baz, foo);
Assert.AreEqual("Hello World!", foo.Qux("Hello World!"));
Assert.AreEqual("2", foo.Qux(2));
}
public void ChangeType(DuckType duckType)
{
type = duckType;
GetComponent <Attack>().type = type;
GetComponent <Health>().type = type;
GetComponent <Move>().type = type;
GetComponent <SpriteRenderer>().sprite = type.sprite;
}
public void As_Struct()
{
int expected = _random.Next();
BespokeInt bespoke = new BespokeInt(expected);
Assert.IsNotInstanceOfType(bespoke, typeof(IHasValue));
IHasValue duck = DuckType.As <IHasValue>(bespoke);
Assert.IsInstanceOfType(duck, typeof(IHasValue));
Assert.AreEqual(expected, duck.Value);
}
public void As()
{
DateTime expected = new DateTime(_random.Next(1900, 2000), _random.Next(1, 12), _random.Next(1, 28));
BespokeDateTime bespoke = new BespokeDateTime(expected);
Assert.IsNotInstanceOfType(bespoke, typeof(IHasValue));
IHasValue duck = DuckType.As <IHasValue>(bespoke);
Assert.IsInstanceOfType(duck, typeof(IHasValue));
Assert.AreEqual(expected, duck.Value);
}
public ExprDotMethodForgeNoDuck(
string optionalStatementName,
MethodInfo method,
ExprForge[] parameters,
DuckType type)
{
OptionalStatementName = optionalStatementName;
Method = method;
Parameters = parameters;
this.type = type;
}
public void TestMethodParameters()
{
Baz baz = new Baz();
Foo foo = DuckType.Cast <Foo>(baz);
Assert.AreNotSame(baz, foo);
foo.MethodString("test");
foo.MethodInt(1337);
foo.MethodBool(true);
foo.MethodLong(1);
}
public void OverloadTestDifferentReturnTypes()
{
Baz baz = new Baz();
Foo foo = DuckType.Cast <Foo>(baz);
Assert.AreNotSame(baz, foo);
Assert.AreEqual("Hello World!", foo.Bar("Hello"));
Assert.AreEqual(4, foo.Bar(2));
Assert.AreEqual(false, foo.Bar(true));
}
static DiagnosticObserverListener()
{
try
{
var diagnosticListenerType = Type.GetType("System.Diagnostics.DiagnosticListener, System.Diagnostics.DiagnosticSource");
if (diagnosticListenerType is null)
{
ThrowHelper.ThrowNullReferenceException("System.Diagnostics.DiagnosticListener cannot be found.");
}
var sourceProxyResult = DuckType.GetOrCreateProxyType(typeof(ISource), diagnosticListenerType);
var sourceProxyResultProxyType = sourceProxyResult.ProxyType;
if (sourceProxyResultProxyType is null)
{
ThrowHelper.ThrowNullReferenceException($"Resulting proxy type after ducktyping {diagnosticListenerType} is null");
}
var onShouldListenToMethodInfo = typeof(ActivityListenerHandler).GetMethod(nameof(ActivityListenerHandler.OnShouldListenTo), BindingFlags.Static | BindingFlags.Public);
if (onShouldListenToMethodInfo is null)
{
ThrowHelper.ThrowNullReferenceException("ActivityListenerHandler.OnShouldListenTo cannot be found.");
}
var onShouldListenToMethod = onShouldListenToMethodInfo.MakeGenericMethod(sourceProxyResultProxyType);
var onShouldListenToResultMethodInfo = typeof(DiagnosticObserverListener).GetMethod(nameof(DiagnosticObserverListener.OnShouldListenToResult), BindingFlags.Static | BindingFlags.Public);
if (onShouldListenToResultMethodInfo is null)
{
ThrowHelper.ThrowNullReferenceException("DiagnosticObserverListener.OnShouldListenToResult cannot be found.");
}
var onShouldListenToResultMethod = onShouldListenToResultMethodInfo.MakeGenericMethod(sourceProxyResultProxyType);
// Create delegate for OnShouldListenTo<T> where T is Source
var onShouldListenToDyn = new DynamicMethod("OnShouldListenToDyn", typeof(void), new[] { typeof(object) }, typeof(ActivityListener).Module, true);
var sourceProxyResultProxyTypeCtor = sourceProxyResultProxyType.GetConstructors()[0];
var onShouldListenToDynIl = onShouldListenToDyn.GetILGenerator();
onShouldListenToDynIl.Emit(OpCodes.Ldarg_0);
onShouldListenToDynIl.Emit(OpCodes.Newobj, sourceProxyResultProxyTypeCtor);
onShouldListenToDynIl.Emit(OpCodes.Dup);
onShouldListenToDynIl.EmitCall(OpCodes.Call, onShouldListenToMethod, null);
onShouldListenToDynIl.EmitCall(OpCodes.Call, onShouldListenToResultMethod, null);
onShouldListenToDynIl.Emit(OpCodes.Ret);
OnShouldListenToDelegate = (Action <object>)onShouldListenToDyn.CreateDelegate(typeof(Action <object>));
}
catch (Exception ex)
{
Log.Error(ex, "Error on DiagnosticObserverListener static constructor");
OnShouldListenToDelegate = o => { };
}
}
public static bool DuckIs <T>(this object instance)
{
if (instance is null)
{
DuckTypeTargetObjectInstanceIsNull.Throw();
}
if (DuckType.CreateCache <T> .IsVisible)
{
return(DuckType.CanCreate <T>(instance));
}
return(false);
}
public static bool DuckIs(this object instance, Type targetType)
{
if (instance is null)
{
DuckTypeTargetObjectInstanceIsNull.Throw();
}
if (targetType != null && (targetType.IsPublic || targetType.IsNestedPublic))
{
return(DuckType.CanCreate(targetType, instance));
}
return(false);
}
public static Duck GetDuck(DuckType muscovy)
{
switch (muscovy)
{
case DuckType.Muscovy:
return(new MuscovyDuck());
case DuckType.Plastic:
return(new PlasticDuck());
default:
return(null);
}
}
public static object DuckAs(this object instance, Type targetType)
{
if (instance is null)
{
DuckTypeTargetObjectInstanceIsNull.Throw();
}
if (targetType != null && (targetType.IsPublic || targetType.IsNestedPublic))
{
DuckType.CreateTypeResult proxyResult = DuckType.GetOrCreateProxyType(targetType, instance.GetType());
if (proxyResult.Success)
{
return(proxyResult.CreateInstance(instance));
}
}
return(null);
}
private static T ConvertType <T>(object value)
{
var conversionType = typeof(T);
if (value is null || conversionType == typeof(object))
{
return((T)value);
}
Type valueType = value.GetType();
if (valueType == conversionType || conversionType.IsAssignableFrom(valueType))
{
return((T)value);
}
// Finally we try to duck type
return(DuckType.Create <T>(value));
}
public static bool TryDuckCast(this object instance, Type targetType, out object value)
{
if (instance is null)
{
DuckTypeTargetObjectInstanceIsNull.Throw();
}
if (targetType != null && (targetType.IsPublic || targetType.IsNestedPublic))
{
DuckType.CreateTypeResult proxyResult = DuckType.GetOrCreateProxyType(targetType, instance.GetType());
if (proxyResult.Success)
{
value = proxyResult.CreateInstance(instance);
return(true);
}
}
value = default;
return(false);
}
public static Duck GetDuckByType(DuckType duckType)
{
switch (duckType)
{
case DuckType.RUBBER_DUCK:
return(new Duck(
new NoFlyer(),
new MutedQuacker()
));
case DuckType.FLYING_BUT_LOUD_DUCK:
return(new Duck(
new GoodFlyer(),
new LoudQuacker()
));
default:
throw new Exception("There is no duck defined with the type: " + duckType.ToString());
}
}
static DiagnosticSourceEventListener()
{
try
{
var activityType = Type.GetType("System.Diagnostics.Activity, System.Diagnostics.DiagnosticSource", throwOnError: true);
var onNextActivityMethodInfo = typeof(DiagnosticSourceEventListener).GetMethod(nameof(DiagnosticSourceEventListener.OnNextActivity), BindingFlags.Static | BindingFlags.NonPublic);
if (onNextActivityMethodInfo is null)
{
ThrowHelper.ThrowNullReferenceException("DiagnosticSourceEventListener.OnNextActivity cannot be found.");
}
// Create delegate for OnNext + Activity
var onNextActivityDynMethod = new DynamicMethod("OnNextActivityDyn", typeof(void), new[] { typeof(string), typeof(KeyValuePair <string, object>), typeof(object) }, typeof(ActivityListener).Module, true);
DuckType.CreateTypeResult onNextActivityProxyResult;
if (activityType !.GetField("_traceId", DuckAttribute.DefaultFlags) is not null)
{
onNextActivityProxyResult = DuckType.GetOrCreateProxyType(typeof(IW3CActivity), activityType);
}
else
{
onNextActivityProxyResult = DuckType.GetOrCreateProxyType(typeof(IActivity), activityType);
}
var onNextActivityProxyResultProxyType = onNextActivityProxyResult.ProxyType;
if (onNextActivityProxyResultProxyType is null)
{
ThrowHelper.ThrowNullReferenceException($"Resulting proxy type after ducktyping {activityType} is null");
}
var onNextActivityMethod = onNextActivityMethodInfo.MakeGenericMethod(onNextActivityProxyResultProxyType);
var onNextActivityProxyTypeCtor = onNextActivityProxyResultProxyType.GetConstructors()[0];
var onNextActivityDynMethodIl = onNextActivityDynMethod.GetILGenerator();
onNextActivityDynMethodIl.Emit(OpCodes.Ldarg_0);
onNextActivityDynMethodIl.Emit(OpCodes.Ldarg_1);
onNextActivityDynMethodIl.Emit(OpCodes.Ldarg_2);
onNextActivityDynMethodIl.Emit(OpCodes.Newobj, onNextActivityProxyTypeCtor);
onNextActivityDynMethodIl.EmitCall(OpCodes.Call, onNextActivityMethod, null);
onNextActivityDynMethodIl.Emit(OpCodes.Ret);
OnNextActivityDelegate = (Action <string, KeyValuePair <string, object>, object?>)onNextActivityDynMethod.CreateDelegate(typeof(Action <string, KeyValuePair <string, object>, object?>));
}
private void CheckDuckType()
{
if (rdbMallard.Checked)
{
_ducktype = DuckType.MallardDuck;
}
if (rdbRedHead.Checked)
{
_ducktype = DuckType.RedHeadDuck;
}
if (rdbRubber.Checked)
{
_ducktype = DuckType.RubberDuck;
}
if (rdbDecoyDuck.Checked)
{
_ducktype = DuckType.DecoyDuck;
}
switch (_ducktype)
{
case DuckType.MallardDuck:
_duck = new MallardDuck();
break;
case DuckType.RedHeadDuck:
_duck = new RedHeadDuck();
break;
case DuckType.RubberDuck:
_duck = new RubberDuck();
break;
case DuckType.DecoyDuck:
_duck = new DecoyDuck();
break;
}
}
public static Delegate CreateOnActivityStoppedDelegate(Type activityType, MethodInfo onActivityStoppedMethodInfo)
{
var dynMethod = new DynamicMethod(
"OnActivityStoppedDyn",
typeof(void),
new[] { activityType },
typeof(ActivityListener).Module,
true);
var activityProxyType = typeof(IActivity5);
if (activityType.Assembly.GetName().Version?.Major >= 6)
{
activityProxyType = typeof(IActivity6);
}
var proxyResult = DuckType.GetOrCreateProxyType(activityProxyType, activityType);
var proxyType = proxyResult.ProxyType;
if (proxyType is null)
{
ThrowHelper.ThrowNullReferenceException($"Resulting proxy type after ducktyping {activityType} is null");
}
var method = onActivityStoppedMethodInfo.MakeGenericMethod(proxyType);
var proxyTypeCtor = proxyType.GetConstructors()[0];
var il = dynMethod.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Newobj, proxyTypeCtor);
il.EmitCall(OpCodes.Call, method, null);
il.Emit(OpCodes.Ret);
return(dynMethod.CreateDelegate(typeof(Action <>).MakeGenericType(activityType)));
}
public bool IsA(DuckType type)
{
return Types[type].All(Properties.ContainsKey) && Inheritance[type].All(IsA);
}
internal static DynamicMethod CreateEndMethodDelegate(Type integrationType, Type targetType, Type returnType)
{
/*
* OnMethodEnd signatures with 3 or 4 parameters with 1 or 2 generics:
* - CallTargetReturn<TReturn> OnMethodEnd<TTarget, TReturn>(TTarget instance, TReturn returnValue, Exception exception, CallTargetState state);
* - CallTargetReturn<TReturn> OnMethodEnd<TTarget, TReturn>(TReturn returnValue, Exception exception, CallTargetState state);
* - CallTargetReturn<[Type]> OnMethodEnd<TTarget>([Type] returnValue, Exception exception, CallTargetState state);
*
*/
Logger.Debug($"Creating EndMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}, ReturnType={returnType.FullName}]");
var onMethodEndMethodInfo = integrationType.GetMethod(EndMethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
if (onMethodEndMethodInfo is null)
{
Logger.Debug($"'{EndMethodName}' method was not found in integration type: '{integrationType.FullName}'.");
return(null);
}
if (onMethodEndMethodInfo.ReturnType.GetGenericTypeDefinition() != typeof(CallTargetReturn <>))
{
throw new ArgumentException($"The return type of the method: {EndMethodName} in type: {integrationType.FullName} is not {nameof(CallTargetReturn)}");
}
var genericArgumentsTypes = onMethodEndMethodInfo.GetGenericArguments();
if (genericArgumentsTypes.Length < 1 || genericArgumentsTypes.Length > 2)
{
throw new ArgumentException($"The method: {EndMethodName} in type: {integrationType.FullName} must have the generic type for the instance type.");
}
var onMethodEndParameters = onMethodEndMethodInfo.GetParameters();
if (onMethodEndParameters.Length < 3)
{
throw new ArgumentException($"The method: {EndMethodName} with {onMethodEndParameters.Length} parameters in type: {integrationType.FullName} has less parameters than required.");
}
else if (onMethodEndParameters.Length > 4)
{
throw new ArgumentException($"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.");
}
var callGenericTypes = new List <Type>();
var mustLoadInstance = onMethodEndParameters.Length == 4;
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 returnParameterIndex = onMethodEndParameters.Length == 4 ? 1 : 0;
var isAGenericReturnValue = onMethodEndParameters[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 (onMethodEndParameters[returnParameterIndex].ParameterType != returnType)
{
throw new ArgumentException($"The ReturnValue type parameter of the method: {EndMethodName} in type: {integrationType.FullName} is invalid. [{onMethodEndParameters[returnParameterIndex].ParameterType} != {returnType}]");
}
var callMethod = new DynamicMethod(
$"{onMethodEndMethodInfo.DeclaringType.Name}.{onMethodEndMethodInfo.Name}.{targetType.Name}.{returnType.Name}",
typeof(CallTargetReturn <>).MakeGenericType(returnType),
new Type[] { targetType, returnType, typeof(Exception), typeof(CallTargetState) },
onMethodEndMethodInfo.Module,
true);
var ilWriter = callMethod.GetILGenerator();
// Load the instance if is needed
if (mustLoadInstance)
{
ilWriter.Emit(OpCodes.Ldarg_0);
if (instanceGenericConstraint != null)
{
WriteCreateNewProxyInstance(ilWriter, instanceProxyType, targetType);
}
}
// Load the return value
ilWriter.Emit(OpCodes.Ldarg_1);
if (returnValueProxyType != null)
{
WriteCreateNewProxyInstance(ilWriter, returnValueProxyType, returnType);
}
// Load the exception
ilWriter.Emit(OpCodes.Ldarg_2);
// Load the state
ilWriter.Emit(OpCodes.Ldarg_3);
// Call Method
onMethodEndMethodInfo = onMethodEndMethodInfo.MakeGenericMethod(callGenericTypes.ToArray());
ilWriter.EmitCall(OpCodes.Call, onMethodEndMethodInfo, null);
// Unwrap return value proxy
if (returnValueProxyType != null)
{
var unwrapReturnValue = UnwrapReturnValueMethodInfo.MakeGenericMethod(returnValueProxyType, returnType);
ilWriter.EmitCall(OpCodes.Call, unwrapReturnValue, null);
}
ilWriter.Emit(OpCodes.Ret);
Logger.Debug($"Created EndMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}, ReturnType={returnType.FullName}]");
return(callMethod);
}
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);
*
*/
Logger.Debug($"Creating EndMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
var onMethodEndMethodInfo = integrationType.GetMethod(EndMethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
if (onMethodEndMethodInfo is null)
{
Logger.Debug($"'{EndMethodName}' method was not found in integration type: '{integrationType.FullName}'.");
return(null);
}
if (onMethodEndMethodInfo.ReturnType != typeof(CallTargetReturn))
{
throw new ArgumentException($"The return type of the method: {EndMethodName} in type: {integrationType.FullName} is not {nameof(CallTargetReturn)}");
}
var genericArgumentsTypes = onMethodEndMethodInfo.GetGenericArguments();
if (genericArgumentsTypes.Length != 1)
{
throw new ArgumentException($"The method: {EndMethodName} in type: {integrationType.FullName} must have a single generic type for the instance type.");
}
var 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.");
}
var callGenericTypes = new List <Type>();
var mustLoadInstance = onMethodEndParameters.Length == 3;
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(
$"{onMethodEndMethodInfo.DeclaringType.Name}.{onMethodEndMethodInfo.Name}",
typeof(CallTargetReturn),
new Type[] { targetType, typeof(Exception), typeof(CallTargetState) },
onMethodEndMethodInfo.Module,
true);
var ilWriter = callMethod.GetILGenerator();
// Load the instance if is needed
if (mustLoadInstance)
{
ilWriter.Emit(OpCodes.Ldarg_0);
if (instanceGenericConstraint != null)
{
WriteCreateNewProxyInstance(ilWriter, instanceProxyType, targetType);
}
}
// Load the exception
ilWriter.Emit(OpCodes.Ldarg_1);
// Load the state
ilWriter.Emit(OpCodes.Ldarg_2);
// Call Method
onMethodEndMethodInfo = onMethodEndMethodInfo.MakeGenericMethod(callGenericTypes.ToArray());
ilWriter.EmitCall(OpCodes.Call, onMethodEndMethodInfo, null);
ilWriter.Emit(OpCodes.Ret);
Logger.Debug($"Created EndMethod 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, ...);
*
*/
Logger.Debug($"Creating BeginMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
var onMethodBeginMethodInfo = integrationType.GetMethod(BeginMethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
if (onMethodBeginMethodInfo is null)
{
Logger.Debug($"'{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();
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.");
}
var callGenericTypes = new List <Type>();
var mustLoadInstance = onMethodBeginParameters.Length != argumentsTypes.Length;
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(
$"{onMethodBeginMethodInfo.DeclaringType.Name}.{onMethodBeginMethodInfo.Name}",
typeof(CallTargetState),
new Type[] { targetType }.Concat(argumentsTypes).ToArray(),
onMethodBeginMethodInfo.Module,
true);
var ilWriter = callMethod.GetILGenerator();
// Load the instance if is needed
if (mustLoadInstance)
{
ilWriter.Emit(OpCodes.Ldarg_0);
if (instanceGenericConstraint != null)
{
WriteCreateNewProxyInstance(ilWriter, instanceProxyType, targetType);
}
}
// Load arguments
for (var i = mustLoadInstance ? 1 : 0; i < onMethodBeginParameters.Length; i++)
{
var sourceParameterType = argumentsTypes[mustLoadInstance ? i - 1 : i];
var targetParameterType = onMethodBeginParameters[i].ParameterType;
Type targetParameterTypeConstraint = null;
Type parameterProxyType = null;
if (targetParameterType.IsGenericParameter)
{
targetParameterType = genericArgumentsTypes[targetParameterType.GenericParameterPosition];
targetParameterTypeConstraint = targetParameterType.GetGenericParameterConstraints().FirstOrDefault(pType => pType != typeof(IDuckType));
if (targetParameterTypeConstraint is null)
{
callGenericTypes.Add(sourceParameterType);
}
else
{
var result = DuckType.GetOrCreateProxyType(targetParameterTypeConstraint, sourceParameterType);
parameterProxyType = result.ProxyType;
callGenericTypes.Add(parameterProxyType);
}
}
else if (!targetParameterType.IsAssignableFrom(sourceParameterType) && (!(sourceParameterType.IsEnum && targetParameterType.IsEnum)))
{
throw new InvalidCastException($"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);
Logger.Debug($"Created BeginMethod Dynamic Method for '{integrationType.FullName}' integration. [Target={targetType.FullName}]");
return(callMethod);
}
