/// <summary>
/// Registers an <see cref="ResolveInterceptor"/> delegate that allows intercepting calls to
/// <see cref="SimpleInjector.Container.GetInstance">GetInstance</see> and
/// <see cref="InstanceProducer.GetInstance()"/>.
/// </summary>
/// <remarks>
/// If multiple registered <see cref="ResolveInterceptor"/> instances must be applied, they will be
/// applied/wrapped in the order of registration, i.e. the first registered interceptor will call the
/// original instance producer delegate, the second interceptor will call the first interceptor, etc.
/// The last registered interceptor will become the outermost method in the chain and will be called
/// first.
/// </remarks>
/// <param name="interceptor">The <see cref="ResolveInterceptor"/> delegate to register.</param>
/// <param name="predicate">The predicate that will be used to check whether the given delegate must
/// be applied to a registration or not. The given predicate will be called once for each registration
/// in the container.</param>
/// <exception cref="ArgumentNullException">
/// Thrown when either the <paramref name="interceptor"/> or <paramref name="predicate"/> are
/// null references.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Thrown when this container instance is locked and can not be altered.
/// </exception>
/// <example>
/// The following example shows the usage of the <see cref="RegisterResolveInterceptor" /> method:
/// <code lang="cs"><![CDATA[
/// var container = new Container();
///
/// container.Options.RegisterResolveInterceptor((context, producer) =>
/// {
/// object instance = producer.Invoke();
/// Console.WriteLine(instance.GetType().Name + " resolved for " + context.Producer.ServiceType.Name);
/// return instance;
/// },
/// context => context.Producer.ServiceType.Name.EndsWith("Controller"));
///
/// container.Register<IHomeViewModel, HomeViewModel>();
/// container.Register<IUserRepository, SqlUserRepository>();
///
/// // This line will write "HomeViewModel resolved for IHomeViewModel" to the console.
/// container.GetInstance<IHomeViewModel>();
/// ]]></code>
/// </example>
public void RegisterResolveInterceptor(
ResolveInterceptor interceptor, Predicate <InitializationContext> predicate)
{
Requires.IsNotNull(interceptor, nameof(interceptor));
Requires.IsNotNull(predicate, nameof(predicate));
this.Container.ThrowWhenContainerIsLockedOrDisposed();
this.Container.RegisterResolveInterceptor(interceptor, predicate);
}
public ContextualResolveInterceptor(ResolveInterceptor interceptor,
Predicate <InitializationContext> predicate)
{
this.Interceptor = interceptor;
this.Predicate = predicate;
}
private static Func <object> ApplyResolveInterceptor(ResolveInterceptor interceptor,
InitializationContext context, Func <object> wrappedProducer)
{
return(() => ThrowWhenResolveInterceptorReturnsNull(interceptor(context, wrappedProducer)));
}
/// <summary>
/// Registers an <see cref="ResolveInterceptor"/> delegate that allows intercepting calls to
/// <see cref="SimpleInjector.Container.GetInstance">GetInstance</see> and
/// <see cref="InstanceProducer.GetInstance()"/>.
/// </summary>
/// <remarks>
/// If multiple registered <see cref="ResolveInterceptor"/> instances must be applied, they will be
/// applied/wrapped in the order of registration, i.e. the first registered interceptor will call the
/// original instance producer delegate, the second interceptor will call the first interceptor, etc.
/// The last registered interceptor will become the outermost method in the chain and will be called
/// first.
/// </remarks>
/// <param name="interceptor">The <see cref="ResolveInterceptor"/> delegate to register.</param>
/// <param name="predicate">The predicate that will be used to check whether the given delegate must
/// be applied to a registration or not. The given predicate will be called once for each registration
/// in the container.</param>
/// <exception cref="ArgumentNullException">
/// Thrown when either the <paramref name="interceptor"/> or <paramref name="predicate"/> are
/// null references.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Thrown when this container instance is locked and can not be altered.
/// </exception>
/// <example>
/// The following example shows the usage of the <see cref="RegisterResolveInterceptor" /> method:
/// <code lang="cs"><![CDATA[
/// var container = new Container();
///
/// container.Options.RegisterResolveInterceptor((context, producer) =>
/// {
/// object instance = producer.Invoke();
/// Console.WriteLine(instance.GetType().Name + " resolved for " + context.Producer.ServiceType.Name);
/// return instance;
/// },
/// context => context.Producer.ServiceType.Name.EndsWith("Controller"));
///
/// container.Register<IHomeViewModel, HomeViewModel>();
/// container.Register<IUserRepository, SqlUserRepository>();
///
/// // This line will write "HomeViewModel resolved for IHomeViewModel" to the console.
/// container.GetInstance<IHomeViewModel>();
/// ]]></code>
/// </example>
public void RegisterResolveInterceptor(ResolveInterceptor interceptor,
Predicate<InitializationContext> predicate)
{
Requires.IsNotNull(interceptor, nameof(interceptor));
Requires.IsNotNull(predicate, nameof(predicate));
this.Container.ThrowWhenContainerIsLocked();
this.Container.RegisterResolveInterceptor(interceptor, predicate);
}
