public object CreateWrapperFromType(Type templateType, MethodToProxify[] methodsToProxify, PropertyToProxify[] propsToProxify = null)
{
Trace.Assert(templateType != null);
Trace.Assert(methodsToProxify != null && methodsToProxify.Length > 0);
string ns = templateType.Assembly.FullName;
AssemblyBuilder assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(new AssemblyName(ns), SAVE_TEST_DLL ? AssemblyBuilderAccess.RunAndSave : AssemblyBuilderAccess.Run);
ModuleBuilder moduleBuilder = SAVE_TEST_DLL ? assemblyBuilder.DefineDynamicModule(ns, "testil.dll") : assemblyBuilder.DefineDynamicModule(ns);
TypeBuilder wrapperBuilder = moduleBuilder.DefineType(templateType.FullName + "Proxy", TypeAttributes.Public, typeof(JishProxy), new Type[0]);
CreateProxyConstructor(wrapperBuilder);
for (int i = 0; i < methodsToProxify.Length; i++)
{
CreateProxyMethod(wrapperBuilder, i, methodsToProxify.ElementAt(i));
}
if (propsToProxify != null)
{
for (int i = 0; i < propsToProxify.Length; i++)
{
GenerateProxyProperty(wrapperBuilder, i, propsToProxify.ElementAt(i));
}
}
Type wrapperType = wrapperBuilder.CreateType();
if (SAVE_TEST_DLL) assemblyBuilder.Save("testil.dll");
return Activator.CreateInstance(wrapperType, new object[] { methodsToProxify });
}
private bool IsValidDelegateMethod(MethodToProxify mp)
{
ParameterInfo[] parameters = mp.RealMethod.GetParameters();
ParameterInfo[] delegateParams = parameters.Where(IsParamDelegate).ToArray();
if (delegateParams.Length == 0)
{
return(false);
}
if (delegateParams.Length > 1)
{
throw new NotSupportedException("Only single delegate callback methods supported. I.e. Cannot have a callback and an errback.");
}
return(true);
}
private void CreateProxyMethod(TypeBuilder wrapperBuilder, int thissIdx, MethodToProxify methodToProxify)
{
Trace.Assert(wrapperBuilder != null);
Trace.Assert(thissIdx >= 0);
Trace.Assert(methodToProxify != null);
MethodInfo realMethod = methodToProxify.RealMethod;
ParameterInfo[] realParams = realMethod.GetParameters();
IList <Type[]> parameterCombinations = GetAllParameterCombinations(realMethod);
foreach (Type[] parameters in parameterCombinations)
{
var methodBuilder = wrapperBuilder.DefineMethod(GetProxMethodName(methodToProxify, realMethod),
MethodAttributes.Public | MethodAttributes.Virtual,
realMethod.ReturnType, parameters);
if (realMethod.GetGenericArguments().Length > 0)
{
// Generics all get changed to objects
realMethod = realMethod.MakeGenericMethod(realMethod.GetGenericArguments().Select(a => typeof(Object)).ToArray());
}
EmitMethodWithParameterCombo(thissIdx, realMethod, parameters, methodBuilder, realParams);
}
}
private string GetProxMethodName(MethodToProxify methodToProxify, MethodInfo realMethod)
{
string name = methodToProxify.OverrideMethodName ?? realMethod.Name;
return(IsValidDelegateMethod(methodToProxify) ? (name + "_internal") : name);
}
private void CreateProxyMethod(TypeBuilder wrapperBuilder, int thissIdx, MethodToProxify methodToProxify)
{
Trace.Assert(wrapperBuilder != null);
Trace.Assert(thissIdx >= 0);
Trace.Assert(methodToProxify != null);
MethodInfo realMethod = methodToProxify.RealMethod;
ParameterInfo[] realParams = realMethod.GetParameters();
IList<Type[]> parameterCombinations = GetAllParameterCombinations(realMethod);
foreach (Type[] parameters in parameterCombinations)
{
var methodBuilder = wrapperBuilder.DefineMethod(GetProxMethodName(methodToProxify, realMethod),
MethodAttributes.Public | MethodAttributes.Virtual,
realMethod.ReturnType, parameters);
if (realMethod.GetGenericArguments().Length > 0)
{
// Generics all get changed to objects
realMethod = realMethod.MakeGenericMethod(realMethod.GetGenericArguments().Select(a => typeof (Object)).ToArray());
}
EmitMethodWithParameterCombo(thissIdx, realMethod, parameters, methodBuilder, realParams);
}
}
private bool IsValidDelegateMethod(MethodToProxify mp)
{
ParameterInfo[] parameters = mp.RealMethod.GetParameters();
ParameterInfo[] delegateParams = parameters.Where(IsParamDelegate).ToArray();
if (delegateParams.Length == 0) return false;
if (delegateParams.Length > 1) throw new NotSupportedException("Only single delegate callback methods supported. I.e. Cannot have a callback and an errback.");
return true;
}
private string GetProxMethodName(MethodToProxify methodToProxify, MethodInfo realMethod)
{
string name = methodToProxify.OverrideMethodName ?? realMethod.Name;
return IsValidDelegateMethod(methodToProxify) ? (name + "_internal") : name;
}
