public static MethodBase GetBestFitMethod(MethodBase[] methods, object[] argValues)
{
int argCount = argValues.Length;
var methodCandidates = methods
.Select(m => new
{
Method = m,
ParameterTypes = m.GetParameters()
.Select(p => p.ParameterType)
.ToArray()
})
.ToArray()
;
var methodsWithSameArity = methodCandidates
.Where(m => m.ParameterTypes.Length == argCount)
.ToArray()
;
if (methodsWithSameArity.Length == 0)
{
return null;
}
Type[] argTypes = argValues
.Select(a => a.GetType())
.ToArray()
;
var weaklyCompatibleMethods = methodsWithSameArity
.Where(m => CompareParameterTypes(argValues, argTypes, m.ParameterTypes, false))
.ToArray()
;
int weaklyCompatibleMethodCount = weaklyCompatibleMethods.Length;
if (weaklyCompatibleMethodCount > 0)
{
if (weaklyCompatibleMethodCount == 1)
{
return weaklyCompatibleMethods[0].Method;
}
var strictlyCompatibleMethods = weaklyCompatibleMethods
.Where(m => CompareParameterTypes(argValues, argTypes, m.ParameterTypes, true))
.ToArray()
;
if (strictlyCompatibleMethods.Length > 0)
{
return strictlyCompatibleMethods[0].Method;
}
return weaklyCompatibleMethods[0].Method;
}
return null;
}