private ServiceDescriptor TryToDiscover(Type serviceType)
{
if (EnumerableStep.IsEnumerable(serviceType))
{
return(null);
}
if (serviceType.IsGenericType)
{
var basicType = serviceType.GetGenericTypeDefinition();
var templatedParameterTypes = serviceType.GetGenericArguments();
var candidates = _services.Where(x => x.ServiceType == basicType && x.ImplementationType != null).Select(x =>
{
return(new ServiceDescriptor(serviceType, x.ImplementationType.MakeGenericType(templatedParameterTypes), x.Lifetime));
}).ToArray();
_services.AddRange(candidates);
if (candidates.Any())
{
return(candidates.LastOrDefault());
}
}
if (serviceType.IsConcrete() && !serviceType.IsGenericTypeDefinition && ChooseConstructor(serviceType) != null)
{
return(new ServiceDescriptor(serviceType, serviceType, ServiceLifetime.Transient));
}
return(null);
}
public ListAssignmentFrame(Type serviceType, Variable[] elements) : base(false)
{
ElementType = EnumerableStep.DetermineElementType(serviceType);
Variable = new Variable(serviceType, Variable.DefaultArgName(ElementType) + "List", this);
Elements = elements;
}
private BuildStep findStep(Type type)
{
// INSTEAD, let's pull all variable sources
// If not a ServiceVariable, use the KnownVariableBuildStep, otherwise use the
// parent build step and do NOT visit its dependencies
var variable = _method.TryFindVariable(type, VariableSource.NotServices);
if (variable != null)
{
return(new KnownVariableBuildStep(variable));
}
var @default = _graph.FindDefault(type);
if (@default == null)
{
if (EnumerableStep.IsEnumerable(type))
{
return(tryFillEnumerableOfAllKnown(type));
}
return(null);
}
return(findStep(@default));
}
private BuildStep tryFillEnumerableOfAllKnown(Type serviceType)
{
var elementType = EnumerableStep.DetermineElementType(serviceType);
var all = _graph.FindAll(elementType);
if (!all.All(x => _graph.CanResolve(x)))
{
return(null);
}
var childSteps = all.Select(FindStep).ToArray();
return(new EnumerableStep(serviceType, childSteps));
}