/// <summary>
/// Utility method resolves the type and logs and returns success.
/// </summary>
private static bool tryResolve(
Type targetType,
out object result,
ServiceConstructorRequest request,
IServiceRegistrationProvider serviceProvider,
Func <Type, object> instanceProvider,
bool logMustResolve)
{
bool CheckResult(object service, string sourceName, out object successResult)
{
if (targetType.IsInstanceOfType(service))
{
request.TraceStack.Add($"{sourceName} resolved '{targetType.GetFriendlyFullName()}'.");
successResult = service;
return(true);
}
successResult = null;
return(false);
}
if (instanceProvider != null)
{
if (CheckResult(instanceProvider(targetType), "InstanceProvider Func", out result))
{
return(true);
}
}
if (CheckResult(serviceProvider.GetService(targetType, request), nameof(IServiceProvider), out result))
{
return(true);
}
if (serviceProvider.ParentServiceProvider
is IServiceRegistrationProvider parentServiceRegistrationProvider)
{
if (CheckResult(
parentServiceRegistrationProvider.GetService(targetType, request),
nameof(IServiceRegistrationProvider.ParentServiceProvider),
out result))
{
return(true);
}
}
else
{
if (CheckResult(
serviceProvider.ParentServiceProvider?.GetService(targetType),
nameof(IServiceRegistrationProvider.ParentServiceProvider),
out result))
{
return(true);
}
}
if (logMustResolve)
{
request.TraceStack.Add($"Did not resolve '{targetType.GetFriendlyFullName()}'.");
}
return(false);
}
private object tryGetService(Type serviceType, ServiceConstructorRequest serviceConstructorRequest)
{
if (serviceType == null)
{
throw new ArgumentNullException(nameof(serviceType));
}
lock (registrations) {
if (serviceConstructorRequest == null)
{
serviceConstructorRequest = newServiceConstructorRequest();
}
return(registrations.TryGetValue(serviceType, out ServiceRegistration registration)
? registration.Get(serviceConstructorRequest)
: parentServiceRegistrationProvider != null
? parentServiceRegistrationProvider.GetService(serviceType, serviceConstructorRequest)
: parentServiceProvider?.GetService(serviceType));
}
}
private object tryGetService(
Type serviceType,
ServiceConstructorRequest serviceConstructorRequest)
{
if (serviceType == null)
{
throw new ArgumentNullException(nameof(serviceType));
}
object service = serviceProvider.GetService(serviceType);
return(serviceType.IsInstanceOfType(service)
? service
: parentServiceRegistrationProvider != null
? parentServiceRegistrationProvider.GetService(
serviceType,
serviceConstructorRequest
?? new ServiceConstructorRequest(
TraceSources.For <ServiceRegistrationProviderWrapper>()))
: ParentServiceProvider?.GetService(serviceType));
}
