FactoryActivator.cs
77 lines
| 3.0 KiB
| text/x-csharp
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CSharpLexer
cin
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r289 | using System; | |
| using System.Collections.Generic; | |||
| using System.Reflection; | |||
| using Implab.Components; | |||
| using Unity; | |||
| using Unity.Injection; | |||
| using Unity.Lifetime; | |||
| namespace Implab.ServiceHost.Unity { | |||
| public class FactoryActivator : ITypeRegistration { | |||
| class FactoryInjector : ITypeMemberInjection { | |||
| public InjectionFactory Factory { get; set; } | |||
| public void Visit(TypeRegistrationBuilder builder) { | |||
| builder.AddInjectionMember(Factory); | |||
| } | |||
| } | |||
| public Type FactoryType { get; set; } | |||
| public string FactoryName { get; set; } | |||
| public Type RegistrationType { get; set; } | |||
| public LifetimeManager Lifetime { get; set; } | |||
| public IEnumerable<ITypeMemberInjection> MemberInjections { | |||
| get { | |||
| if (RegistrationType == null) | |||
| throw new Exception($"RegistrationType must be specified"); | |||
| if (!typeof(IFactory<>).MakeGenericType(RegistrationType).IsAssignableFrom(FactoryType)) | |||
| throw new Exception($"The factory {FactoryType} can't be used to create {RegistrationType} instances"); | |||
| if (FactoryType.ContainsGenericParameters) { | |||
| yield return new FactoryInjector { | |||
| Factory = CreateDynamicInjectionFactory(FactoryName) | |||
| }; | |||
| } else { | |||
| yield return new FactoryInjector { | |||
| Factory = (InjectionFactory)GetType() | |||
| .GetMethod(nameof(CreateInjectionFactory), BindingFlags.Static | BindingFlags.NonPublic) | |||
| .MakeGenericMethod(FactoryType, RegistrationType) | |||
| .Invoke(null, new [] { FactoryName }) | |||
| }; | |||
| } | |||
| } | |||
| } | |||
| public string Name { get; set; } | |||
| public Type GetRegistrationType(ContainerBuilder builder) { | |||
| return RegistrationType; | |||
| } | |||
| public LifetimeManager GetLifetime(ContainerBuilder builder) { | |||
| return Lifetime; | |||
| } | |||
| public Type GetImplementationType(ContainerBuilder builder) { | |||
| return null; | |||
| } | |||
| /// <summary> | |||
| /// Указывает зависимость, реализующую интерфейс <see cref="IFactory{TObj}"/>, | |||
| /// которая будет использоваться в качестве фабрики для создания объектов | |||
| /// </summary> | |||
| /// <param name="dependencyName"></param> | |||
| static InjectionFactory CreateInjectionFactory<TFac, TObj>(string dependencyName) where TFac : IFactory<TObj> { | |||
| return new InjectionFactory(c => c.Resolve<TFac>(dependencyName).Create()); | |||
| } | |||
| static InjectionFactory CreateDynamicInjectionFactory(string dependencyName) { | |||
| return new InjectionFactory((c,t,name) => ((IFactory<object>)c.Resolve(t, dependencyName)).Create()); | |||
| } | |||
| } | |||
| } |