internal object GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
{
var realizedService = RealizedServices.GetOrAdd(serviceType, _createServiceAccessor);
_callback?.OnResolve(serviceType, serviceProviderEngineScope);
return(realizedService.Invoke(serviceProviderEngineScope));
}
/// <summary>
/// Gets the service object of the specified type.
/// </summary>
/// <param name="serviceType"></param>
/// <returns></returns>
public object GetService(Type serviceType)
{
var realizedService = RealizedServices.GetOrAdd(serviceType, _createServiceAccessor, this);
_callSiteValidator?.ValidateResolution(serviceType, this);
return(realizedService.Invoke(this));
}
internal object GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
{
if (_disposed)
{
ThrowHelper.ThrowObjectDisposedException();
}
var realizedService = RealizedServices.GetOrAdd(serviceType, _createServiceAccessor);
_callback?.OnResolve(serviceType, serviceProviderEngineScope);
return(realizedService.Invoke(serviceProviderEngineScope));
}
/// <summary>
/// 这个方法获取服务实例对象，可以看到具有两个此方法，并且第一个调用了第二个，并将顶级容器Root进行了传入，而在第二个方法中，获取并添加_createServiceAccessor委托，然后调用此委托进行获取服务实例
/// </summary>
/// <param name="serviceType"></param>
/// <param name="serviceProviderEngineScope"></param>
/// <returns></returns>
internal object GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
{
if (_disposed)
{
ThrowHelper.ThrowObjectDisposedException();
}
var realizedService = RealizedServices.GetOrAdd(serviceType, _createServiceAccessor); //添加并获取根据容器对象实例化对象的方法,其方法由子类进行重写
_callback?.OnResolve(serviceType, serviceProviderEngineScope); // 验证是否允许进行实例化对象
return(realizedService.Invoke(serviceProviderEngineScope));
}
internal object GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
{
if (_disposed)
{
ThrowHelper.ThrowObjectDisposedException();
}
Func <ServiceProviderEngineScope, object> realizedService = RealizedServices.GetOrAdd(serviceType, _createServiceAccessor);
_callback?.OnResolve(serviceType, serviceProviderEngineScope);
DependencyInjectionEventSource.Log.ServiceResolved(serviceType);
return(realizedService.Invoke(serviceProviderEngineScope));
}
internal object GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope) //获取服务类型对应的服务实例，首先会从 RealizedServices 中获取服务类型对应的创建实例方法 （如果没有就会在运行是将该方法加入 RealizedServices，运行时动态添加）。
//获取的创建实例的委托方法需要一个类型为 ServiceProviderEngineScope 的参数才能调用，返回服务实例。
//最后调用这个创建服务类型实例的方法。
{
if (_disposed)
{
ThrowHelper.ThrowObjectDisposedException();
}
var realizedService = RealizedServices.GetOrAdd(serviceType, _createServiceAccessor);
_callback?.OnResolve(serviceType, serviceProviderEngineScope);
return(realizedService.Invoke(serviceProviderEngineScope));
}
protected virtual Func <ServiceProviderEngineScope, object> GetOrCreateRealizedService(Type serviceType)
{
return(RealizedServices.GetOrAdd(serviceType, _createServiceAccessor));
}
