/// <summary>
/// Initializes a new instance of the <see cref="BoundConstructor"/> class, for an unsuccessful bind.
/// </summary>
/// <param name="binder">The binder that generated this binding.</param>
/// <param name="firstNonBindableParameter">The first parameter that prevented binding.</param>
internal BoundConstructor(ConstructorBinder binder, ParameterInfo firstNonBindableParameter)
{
Binder = binder;
CanInstantiate = false;
_firstNonBindableParameter = firstNonBindableParameter ?? throw new ArgumentNullException(nameof(firstNonBindableParameter));
_factory = null;
_valueRetrievers = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="BoundConstructor"/> class for a successful bind.
/// </summary>
/// <param name="binder">The binder that generated this binding.</param>
/// <param name="factory">The instance factory.</param>
/// <param name="valueRetrievers">The set of value-retrieval functions.</param>
internal BoundConstructor(ConstructorBinder binder, Func <object?[], object> factory, Func <object?>[] valueRetrievers)
{
CanInstantiate = true;
Binder = binder;
_factory = factory ?? throw new ArgumentNullException(nameof(factory));
_valueRetrievers = valueRetrievers ?? throw new ArgumentNullException(nameof(valueRetrievers));
_firstNonBindableParameter = null;
}
/// <inheritdoc/>
public void ConfigurePipeline(IComponentRegistryServices componentRegistryServices, IResolvePipelineBuilder pipelineBuilder)
{
if (componentRegistryServices is null)
{
throw new ArgumentNullException(nameof(componentRegistryServices));
}
if (pipelineBuilder is null)
{
throw new ArgumentNullException(nameof(pipelineBuilder));
}
// Locate the possible constructors at container build time.
var availableConstructors = ConstructorFinder.FindConstructors(_implementationType);
if (availableConstructors.Length == 0)
{
throw new NoConstructorsFoundException(_implementationType, string.Format(CultureInfo.CurrentCulture, ReflectionActivatorResources.NoConstructorsAvailable, _implementationType, ConstructorFinder));
}
var binders = new ConstructorBinder[availableConstructors.Length];
for (var idx = 0; idx < availableConstructors.Length; idx++)
{
binders[idx] = new ConstructorBinder(availableConstructors[idx]);
}
_constructorBinders = binders;
pipelineBuilder.Use(ToString(), PipelinePhase.Activation, MiddlewareInsertionMode.EndOfPhase, (ctxt, next) =>
{
ctxt.Instance = ActivateInstance(ctxt, ctxt.Parameters);
next(ctxt);
});
}
/// <summary> /// Initializes a new instance of the <see cref="BoundConstructor"/> class, for an unsuccessful bind. /// </summary> /// <param name="binder">The binder that generated this binding.</param> /// <param name="firstNonBindableParameter">The first parameter that prevented binding.</param> public static BoundConstructor ForBindFailure(ConstructorBinder binder, ParameterInfo firstNonBindableParameter) => new BoundConstructor(binder, firstNonBindableParameter);
public static BoundConstructor ForBindSuccess(ConstructorBinder binder, Func <object?[], object> factory, Func <object?>[] valueRetrievers) => new BoundConstructor(binder, factory, valueRetrievers);
