private static IEnumerable <PropertyInjector> CreatePropertyInjectors(ScopedComponentBase instance)
{
Type componentType = instance.GetType();
var properties = componentType
.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
.Select(p => new { Property = p, Attribute = p.GetCustomAttribute <InjectScopedAttribute>() })
.Where(x => x.Attribute != null)
.Select(x => new { x.Property.PropertyType, x.Property.SetMethod })
.Where(x => x.SetMethod != null);
var injectors = new List <PropertyInjector>();
foreach (var property in properties)
{
var setterDelegateType = typeof(Action <,>).MakeGenericType(componentType, property.PropertyType);
var setterDelegate = Delegate.CreateDelegate(setterDelegateType, property.SetMethod);
Action <object, object> setProperty = (inst, service) => setterDelegate.DynamicInvoke(inst, service);
var injector = new PropertyInjector(property.PropertyType, setProperty);
injectors.Add(injector);
}
return(injectors);
}
public static void InjectDependencies(ScopedComponentBase instance, IServiceProvider serviceProvider)
{
IEnumerable <PropertyInjector> propertyInjectors = TypeToPropertyInjectors.GetOrAdd(instance.GetType(), _ => CreatePropertyInjectors(instance));
var serviceTypes = propertyInjectors.Select(x => x.ServiceType).Distinct().ToDictionary(x => x, x => serviceProvider.GetService(x));
foreach (var injector in propertyInjectors)
{
injector.PropertySetter(instance, serviceTypes[injector.ServiceType]);
}
}