[Asp.net 5] DependencyInjection项目代码分析4-微软的实现（2）

在 DependencyInjection项目代码分析4-微软的实现（1）中介绍了“ServiceTable”、“ServiceEntry”、“IGenericService”、“IService”、“IServiceCallSite”，这篇介绍下“IGenericService、"IService"、"IServiceCallSite"实现类

GenericService类

做为IGenericService的唯一实现类，该类言简意赅，请看代码：

internal class GenericService : IGenericService
    {
        private readonly ServiceDescriptor _descriptor;

        public GenericService(ServiceDescriptor descriptor)
        {
            _descriptor = descriptor;
        }

        public ServiceLifetime Lifetime
        {
            get { return _descriptor.Lifetime; }
        }

        public IService GetService(Type closedServiceType)
        {
            Type[] genericArguments = closedServiceType.GetTypeInfo().GenericTypeArguments;
            Type closedImplementationType =
                _descriptor.ImplementationType.MakeGenericType(genericArguments);

            var closedServiceDescriptor = new ServiceDescriptor(closedServiceType, closedImplementationType, Lifetime);
            return new Service(closedServiceDescriptor);
        }
    }

GenericService