internal ObjectDI(ObjectDI parent)
{
_root = parent._root;
_registries = _root._registries;
_services = new ConcurrentDictionary <ServiceRegistry, object>();
_disposables = new ConcurrentBag <IDisposable>();
}
public ObjectDI()
{
_registries = new ConcurrentDictionary <Type, ServiceRegistry>();
_root = this;
_services = new ConcurrentDictionary <ServiceRegistry, object>();
_disposables = new ConcurrentBag <IDisposable>();
}
public static ObjectDI Register <TServiceType>(
this ObjectDI cat,
Func <ObjectDI, TServiceType> factory,
LifecCycle lifetime)
{
cat.Register(new ServiceRegistry(
typeof(TServiceType), lifetime, (_, arguments) => factory(_)));
return(cat);
}
public static ObjectDI Register <TServiceType>(
this ObjectDI cat,
TServiceType instance)
{
Func <ObjectDI, Type[], object> factory =
(_, arguments) => instance;
cat.Register(new ServiceRegistry(typeof(TServiceType),
LifecCycle.Single, factory));
return(cat);
}
public static ObjectDI Register(
this ObjectDI cat,
Type from,
Type to,
LifecCycle lifetime)
{
Func <ObjectDI, Type[], object> factory =
(_, arguments) => Create(_, to, arguments);
cat.Register(new ServiceRegistry(from, lifetime, factory));
return(cat);
}
private static object Create(
ObjectDI cat,
Type type,
Type[] genericArguments)
{
if (genericArguments.Length > 0)
{
type = type.MakeGenericType(genericArguments);
}
var constructors = type
.GetConstructors();
if (constructors.Length == 0)
{
throw new InvalidOperationException($"Cannot create the instance of {type} which does not have an public constructor.");
}
var constructor = constructors.FirstOrDefault(
it => it.GetCustomAttributes(false)
.OfType <InjectionAttribute>().Any());
constructor = constructor ?? constructors.First();
var parameters = constructor.GetParameters();
if (parameters.Length == 0)
{
return(Activator.CreateInstance(type));
}
var arguments = new object[parameters.Length];
for (int index = 0; index < arguments.Length; index++)
{
var parameter = parameters[index];
var parameterType = parameter.ParameterType;
if (cat.HasRegistry(parameterType))
{
arguments[index] = cat.GetService(parameterType);
}
else if (parameter.HasDefaultValue)
{
arguments[index] = parameter.DefaultValue;
}
else
{
throw new InvalidOperationException($"Cannot create the instance of {type} whose constructor has non-registered parameter type(s)");
}
}
return(Activator.CreateInstance(type, arguments));
}
/// <summary>
/// 私有构造
/// </summary>
private StartService()
{
//ContainerBuilder containerBuilder = new ContainerBuilder();
//var typeFinder = new AppDomainTypeFinder();
//containerBuilder.RegisterInstance(typeFinder).As<ITypeFinder>().SingleInstance();
//Container = containerBuilder.Build();
ObjectDI objectDI = new ObjectDI();
var typeFinder = new AppDomainTypeFinder();
objectDI.Register <ITypeFinder>(typeFinder);
var drTypes = typeFinder.FindClassesOfType <IDependencyManager>();
var drInstances = new List <IDependencyManager>();
foreach (var item in drTypes)
{
drInstances.Add((IDependencyManager)Activator.CreateInstance(item));
}
drInstances = drInstances.AsQueryable().OrderBy(x => x.Order).ToList();
foreach (var item in drInstances)
{
item.Register(objectDI, typeFinder);
}
Container = objectDI;
}
public static T GetService <T>(this ObjectDI cat) => (T)cat.GetService(typeof(T));
public static IEnumerable <T> GetServices <T>(this ObjectDI cat) => cat.GetService <IEnumerable <T> >();
public static bool HasRegistry(this ObjectDI cat, Type serviceType) => cat._root._registries.ContainsKey(serviceType);
public static bool HasRegistry <T>(this ObjectDI cat) => cat.HasRegistry(typeof(T));
public static ObjectDI Register <TFrom, TTo>(
this ObjectDI cat,
LifecCycle lifetime) where TTo : TFrom
=> cat.Register(typeof(TFrom), typeof(TTo), lifetime);
