/// <summary>
/// Creates an instance within the specified context.
/// </summary>
/// <param name="context">The context.</param>
/// <returns>The created instance.</returns>
public virtual object Create(IContext context)
{
Ensure.ArgumentNotNull(context, "context");
if (context.Plan == null)
{
context.Plan = Planner.GetPlan(GetImplementationType(context.Request.Service));
}
if (!context.Plan.Has <ConstructorInjectionDirective>())
{
throw new ActivationException(ExceptionFormatter.NoConstructorsAvailable(context));
}
var directives = context.Plan.GetAll <ConstructorInjectionDirective>();
var bestDirectives = directives
.GroupBy(option => ConstructorScorer.Score(context, option))
.OrderByDescending(g => g.Key)
.First();
if (bestDirectives.Skip(1).Any())
{
throw new ActivationException(ExceptionFormatter.ConstructorsAmbiguous(context, bestDirectives));
}
var directive = bestDirectives.Single();
var arguments = directive.Targets.Select(target => GetValue(context, target)).ToArray();
return(directive.Injector(arguments));
}
private Tuple <ConstructorInfo, ParameterInfo[]> GetCtor(Type concrete, IDictionary <string, object> arguments)
{
var constructor = new ConstructorScorer(concrete, arguments).GetConstructor();
return(Tuple.Create(constructor, constructor.GetParameters()));
}
