private static Comparison <T> attributeParameterCountSort <T>(IReadOnlyCollection <Type> attributeTypes)
where T : MethodBase
{
int Sort(T x, T y)
=> ServiceConstructorMethods.hasAttributePredicate <T>(attributeTypes)(x)
? ServiceConstructorMethods.hasAttributePredicate <T>(attributeTypes)(y)
? -x.GetParameters().Length.CompareTo(y.GetParameters().Length)
: -1
: ServiceConstructorMethods.hasAttributePredicate <T>(attributeTypes)(y)
? 1
: -x.GetParameters().Length.CompareTo(y.GetParameters().Length);
return(Sort);
}
/// <summary>
/// Utility method returns all Public and NonPublic constructors,
/// sorted with the most parameters first.
/// </summary>
private static IEnumerable <ConstructorInfo> findConstructors(
Type type,
bool?requireAttributes,
IReadOnlyCollection <Type> attributeTypes,
ISequence <object> traceStack)
{
List <ConstructorInfo> constructors
= type.GetConstructors(
BindingFlags.Instance
| BindingFlags.Public
| BindingFlags.NonPublic)
.ToList();
if (constructors.Count == 0)
{
traceStack.Add($"No constructors found for '{type.GetFriendlyFullName()}'.");
}
if (requireAttributes == false)
{
constructors.Sort(ServiceConstructorMethods.attributeParameterCountSort <ConstructorInfo>(attributeTypes));
return(constructors);
}
if ((requireAttributes == true) ||
(constructors.FindIndex(
ServiceConstructorMethods.hasAttributePredicate <ConstructorInfo>(attributeTypes))
>= 0))
{
constructors.RemoveAll(ServiceConstructorMethods.hasAttributePredicate <ConstructorInfo>(attributeTypes, true));
}
if (constructors.Count == 0)
{
traceStack.Add(
$"No selected constructors found for '{type.GetFriendlyFullName()}'"
+ $" --- {attributeTypes.ToStringCollection(256, t => t.GetFriendlyFullName())}.");
}
constructors.Sort(
ServiceConstructorMethods
.attributeParameterCountSort <ConstructorInfo>(attributeTypes));
return(constructors);
}