/// <summary>
/// Returns true if the parameter is able to provide a value to a particular site.
/// </summary>
/// <param name="pi">Constructor, method, or property-mutator parameter.</param>
/// <param name="context">The component context in which the value is being provided.</param>
/// <param name="valueProvider">If the result is true, the valueProvider parameter will
/// be set to a function that will lazily retrieve the parameter value. If the result is false,
/// will be set to null.</param>
/// <returns>True if a value can be supplied; otherwise, false.</returns>
public override bool CanSupplyValue(ParameterInfo pi, IComponentContext context, out Func<object> valueProvider)
{
IComponentRegistration registration;
if (context.ComponentRegistry.TryGetRegistration(new TypedService(pi.ParameterType), out registration))
{
valueProvider = () => context.ResolveComponent(registration, Enumerable.Empty<Parameter>());
return true;
}
valueProvider = null;
return false;
}
/*
* This method create instance via reflection. Try evaluating its parameters and
* inject them using componentContext.
*
* No public members are allowed to add.
*/
public object Activate(IComponentContext componentContext)
{
var constructors = serviceType.GetConstructors();
if (constructors.Length != 1)
{
throw new DependencyResolutionException();
}
var constructor = constructors.First();
ParameterInfo[] parametesTypess = constructor.GetParameters();
var parameters = parametesTypess.Select(p => componentContext.ResolveComponent(new TypedService(p.ParameterType))).ToArray();
return(Activator.CreateInstance(serviceType, parameters));
}
/*
* This method create instance via reflection. Try evaluating its parameters and
* inject them using componentContext.
*
* No public members are allowed to add.
*/
public object Activate(IComponentContext componentContext)
{
var constructorInfos = serviceType
.GetConstructors(BindingFlags.Instance | BindingFlags.Public).ToList();
if (!constructorInfos.Any() || constructorInfos.Count > 1)
{
throw new DependencyResolutionException();
}
return(Activator
.CreateInstance(
serviceType, constructorInfos.Single().GetParameters()
.Select(param => componentContext.ResolveComponent(new TypedService(param.ParameterType))).ToArray()));
}
/*
* This method create instance via reflection. Try evaluating its parameters and
* inject them using componentContext.
*
* No public members are allowed to add.
*/
public object Activate(IComponentContext componentContext)
{
var constructorInfos = serviceType.GetConstructors();
if (!constructorInfos.Any() || constructorInfos.Length > 1)
{
throw new DependencyResolutionException();
}
ConstructorInfo constructorInfo = constructorInfos[0];
var parameters = constructorInfo.GetParameters()
.Select(p => componentContext.ResolveComponent(new TypedService(p.ParameterType)))
.ToArray();
return(Activator.CreateInstance(serviceType, parameters));
}
public static T ResolveUnregistered <T>(
this IComponentContext context,
Type serviceType,
IEnumerable <Parameter> parameters)
{
var scope = context.Resolve <ILifetimeScope>();
using (var innerScope = scope.BeginLifetimeScope(b => b.RegisterType(serviceType)))
{
innerScope.ComponentRegistry.TryGetRegistration(
new TypedService(serviceType),
out var reg);
return((T)context.ResolveComponent(reg, parameters));
}
}
public override bool CanSupplyValue(ParameterInfo pi, IComponentContext context, out Func <object> valueProvider)
{
IComponentRegistration registration;
Func <object> func = null;
if (context.ComponentRegistry.TryGetRegistration(new TypedService(pi.ParameterType), out registration))
{
if (func == null)
{
func = () => context.ResolveComponent(registration, Enumerable.Empty <Parameter>());
}
valueProvider = func;
return(true);
}
valueProvider = null;
return(false);
}
/*
* This method create instance via reflection. Try evaluating its parameters and
* inject them using componentContext.
*
* No public members are allowed to add.
*/
public object Activate(IComponentContext componentContext)
{
var constructors = serviceType.GetConstructors();
if (1 != constructors.Length)
{
throw new DependencyResolutionException();
}
var constructorInfo = constructors[0];
var parameters = constructorInfo
.GetParameters()
.Select(p =>
componentContext.ResolveComponent(new TypedService(p.ParameterType)))
.ToArray();
return(constructors[0].Invoke(parameters));
}
/*
* This method create instance via reflection. Try evaluating its parameters and
* inject them using componentContext.
*
* No public members are allowed to add.
*/
public object Activate(IComponentContext componentContext)
{
var constructorInfos = serviceType.GetConstructors(BindingFlags.Instance | BindingFlags.Public);
if (constructorInfos.Length != 1)
{
throw new DependencyResolutionException();
}
var constructor = constructorInfos.Single();
var parameters = new List <object>();
foreach (var i in constructor.GetParameters())
{
Type paramtype = i.ParameterType;
var instance = componentContext.ResolveComponent(new TypedService(paramtype));
parameters.Add(instance);
}
return(constructor.Invoke(parameters.ToArray()));
}
/// <summary>
/// Returns true if the parameter is able to provide a value to a particular site.
/// </summary>
/// <param name="pi">Constructor, method, or property-mutator parameter.</param>
/// <param name="context">The component context in which the value is being provided.</param>
/// <param name="valueProvider">If the result is true, the valueProvider parameter will
/// be set to a function that will lazily retrieve the parameter value. If the result is false,
/// will be set to null.</param>
/// <returns>True if a value can be supplied; otherwise, false.</returns>
/// <exception cref="System.ArgumentNullException">
/// Thrown if <paramref name="pi" /> or <paramref name="context" /> is <see langword="null" />.
/// </exception>
public override bool CanSupplyValue(ParameterInfo pi, IComponentContext context, out Func <object> valueProvider)
{
if (pi == null)
{
throw new ArgumentNullException("pi");
}
if (context == null)
{
throw new ArgumentNullException("context");
}
IComponentRegistration registration;
if (context.ComponentRegistry.TryGetRegistration(new TypedService(pi.ParameterType), out registration))
{
valueProvider = () => context.ResolveComponent(registration, Enumerable.Empty <Parameter>());
return(true);
}
valueProvider = null;
return(false);
}
/*
* This method create instance via reflection. Try evaluating its parameters and
* inject them using componentContext.
*
* No public members are allowed to add.
*/
public object Activate(IComponentContext componentContext)
{
ConstructorInfo constructorInfo;
try
{
constructorInfo = serviceType.GetConstructors(BindingFlags.Instance | BindingFlags.Public).Single();
}
catch
{
throw new DependencyResolutionException();
}
var parameters = constructorInfo
.GetParameters()
.Select(p => componentContext.ResolveComponent(new TypedService(p.ParameterType)))
.ToArray();
return(constructorInfo.Invoke(parameters));
}
public bool TryResolve(
Type serviceType,
out object instance)
{
if (_componentContext.TryResolve(serviceType, out instance))
{
return(true);
}
// Try resolving registrationless.
var scope = _componentContext.Resolve <ILifetimeScope>();
using (var innerScope = scope.BeginLifetimeScope(b => b.RegisterType(serviceType)))
{
var componentRegistration = default(IComponentRegistration);
if (innerScope.ComponentRegistry.TryGetRegistration(
new TypedService(serviceType),
out componentRegistration))
{
try
{
instance = _componentContext.ResolveComponent(
componentRegistration,
new Parameter[0]);
return(true);
}
catch (DependencyResolutionException)
{
}
}
}
instance = null;
return(false);
}
/// <summary>
/// Returns true if the parameter is able to provide a value to a particular site.
/// </summary>
/// <param name="pi">Constructor, method, or property-mutator parameter.</param>
/// <param name="context">The component context in which the value is being provided.</param>
/// <param name="valueProvider">If the result is true, the valueProvider parameter will
/// be set to a function that will lazily retrieve the parameter value. If the result is false,
/// will be set to null.</param>
/// <returns>True if a value can be supplied; otherwise, false.</returns>
/// <exception cref="System.ArgumentNullException">
/// Thrown if <paramref name="pi" /> or <paramref name="context" /> is <see langword="null" />.
/// </exception>
public override bool CanSupplyValue(ParameterInfo pi, IComponentContext context, [NotNullWhen(returnValue: true)] out Func <object?>?valueProvider)
{
if (pi == null)
{
throw new ArgumentNullException(nameof(pi));
}
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var service = new TypedService(pi.ParameterType);
if (context.ComponentRegistry.TryGetServiceRegistration(service, out var implementation))
{
valueProvider = () => context.ResolveComponent(new ResolveRequest(service, implementation, Enumerable.Empty <Parameter>()));
return(true);
}
valueProvider = null;
return(false);
}
static void StartStartableComponents(IComponentContext componentContext)
{
// We track which registrations have already been auto-activated by adding
// a metadata value. If the value is present, we won't re-activate. This helps
// in the container update situation.
const string started = "__AutoActivated";
object meta;
foreach (var startable in componentContext.ComponentRegistry.RegistrationsFor(new TypedService(typeof(IStartable))).Where(r => !r.Metadata.TryGetValue(started, out meta)))
{
try
{
var instance = (IStartable)componentContext.ResolveComponent(startable, Enumerable.Empty<Parameter>());
instance.Start();
}
finally
{
startable.Metadata[started] = true;
}
}
foreach (var registration in componentContext.ComponentRegistry.RegistrationsFor(new AutoActivateService()).Where(r => !r.Metadata.TryGetValue(started, out meta)))
{
try
{
componentContext.ResolveComponent(registration, Enumerable.Empty<Parameter>());
}
catch (DependencyResolutionException ex)
{
throw new DependencyResolutionException(String.Format(CultureInfo.CurrentCulture, ContainerBuilderResources.ErrorAutoActivating, registration), ex);
}
finally
{
registration.Metadata[started] = true;
}
}
}
public static T ResolveNamed <T>(
this IComponentContext componentContext,
string name)
{
return((T)componentContext.ResolveComponent(new TypedNameService(typeof(T), name)));
}
public static object Resolve(
this IComponentContext componentContext,
Type serviceType)
{
return(componentContext.ResolveComponent(new TypedService(serviceType)));
}
/// <inheritdoc/> protected override object ResolveInstance <T>(IComponentContext ctx, ResolveRequest request) => new Meta <T>((T)ctx.ResolveComponent(request), request.Registration.Target.Metadata);
public object ResolveComponent(IComponentRegistration registration, IEnumerable <Parameter> parameters)
{
_profile.RecordDependency(_registration, registration);
return(_context.ResolveComponent(registration, parameters));
}
static void StartStartableComponents(IComponentContext componentContext)
{
var ts = new TypedService(typeof(IStartable));
foreach (var startable in componentContext.ComponentRegistry.RegistrationsFor(ts))
{
var instance = (IStartable)componentContext.ResolveComponent(ts, startable, Enumerable.Empty<Parameter>());
instance.Start();
}
}
protected override object ResolveInstance <T>(IComponentContext ctx, ResolveRequest request)
{
return(new Mapped <T>((T)ctx.ResolveComponent(request)));
}
private static THandler ResolveComponent(IComponentContext context, IComponentRegistration registration)
{
return((THandler)context.ResolveComponent(registration, AutofacHelper.NoParameters));
}
public object ResolveComponent(global::Autofac.Core.IComponentRegistration registration, IEnumerable <global::Autofac.Core.Parameter> parameters)
{
return(_context.ResolveComponent(registration, parameters));
}