/// <summary>
/// Creates the visitors that are <see cref="TypeInfo.IsAssignableFrom(TypeInfo)"/> to the specified type.
/// </summary>
/// <typeparam name="TRegistration">The type of visitor.</typeparam>
/// <param name="container">The <see cref="CompositionContainer"/>.</param>
/// <param name="manager">The <see cref="VisitorManager"/>.</param>
/// <returns>
/// The visitors that are <see cref="TypeInfo.IsAssignableFrom(TypeInfo)"/> to the specified type.
/// </returns>
public IEnumerable <IRegistrationVisitor <TRegistration> > CreateVisitors <TRegistration>(
CompositionContainer container,
VisitorManager manager)
where TRegistration : class, IRegistration
{
if (container == null)
{
throw new ArgumentNullException(nameof(container));
}
if (manager == null)
{
throw new ArgumentNullException(nameof(manager));
}
Type visitorType = typeof(IRegistrationVisitor <TRegistration>);
IReadOnlyList <object> nonTypedFactories =
VisitorFactoryCache.GetOrAdd(visitorType, t => CreateVisitorFactories <TRegistration>());
IEnumerable <Func <CompositionContainer, VisitorManager, IRegistrationVisitor <TRegistration> > > factories =
nonTypedFactories
.Cast <Func <CompositionContainer, VisitorManager, IRegistrationVisitor <TRegistration> > >();
return(factories.Select(f => f(container, manager)));
}
private static void VisitRegistration <TRegistration>(VisitorManager manager, IRegistration registration)
where TRegistration : class, IRegistration
{
if (registration == null)
{
throw new ArgumentNullException(nameof(registration));
}
if (manager == null)
{
throw new ArgumentNullException(nameof(manager));
}
Type visitorType = typeof(IRegistrationVisitor <TRegistration>);
if (!manager._visitors.TryGetValue(visitorType, out IRegistrationVisitor[] visitors))
private static void ProcessRegistrations(
CompositionContainer container,
IEnumerable <Type> externalVisitorTypes = null)
{
if (container == null)
{
throw new ArgumentNullException(nameof(container));
}
var visitorManager = new VisitorManager(container, externalVisitorTypes);
IEnumerable <IRegistration> registrations = container.Registrations.Values.SelectMany(r => r);
foreach (IRegistration registration in registrations)
{
visitorManager.Visit(registration);
}
}