IDictionary <ServiceRegistrationKey, IServiceRegistration> GetNonConflictingRegistrations(IEnumerable <ServiceRegistrationKey> alreadyFound,
IServiceRegistrationProvider provider,
Type serviceTypeFilter)
{
if (alreadyFound == null)
{
throw new ArgumentNullException(nameof(alreadyFound));
}
if (provider == null)
{
throw new ArgumentNullException(nameof(provider));
}
var candidates = (serviceTypeFilter != null)? provider.GetAll(serviceTypeFilter) : provider.GetAll();
if (candidates == null)
{
candidates = new IServiceRegistration[0];
}
return((from registration in candidates
let key = ServiceRegistrationKey.ForRegistration(registration)
where !alreadyFound.Contains(key)
select new { Registration = registration, Key = key })
.ToDictionary(k => k.Key, v => v.Registration));
}
bool IServiceRegistrationProvider.HasRegistration(ServiceRegistrationKey key)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
return(Contains(key));
}
/// <summary>
/// Gets a value which indicates whether or not the current provider has a matching registrations.
/// </summary>
/// <returns>
/// <c>true</c>, if a matching registration is available, <c>false</c> otherwise.</returns>
/// <param name="key">A registration key.</param>
public bool HasRegistration(ServiceRegistrationKey key)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
return(providers.Any(x => x.HasRegistration(key)));
}
/// <summary>
/// Gets a value that indicates whether or not the current registration matches the specified registration key or not.
/// </summary>
/// <returns>
/// <c>true</c>, if the current instance matches the specified key, <c>false</c> otherwise.</returns>
/// <param name="key">The registration key against which to test.</param>
public virtual bool MatchesKey(ServiceRegistrationKey key)
{
if (key == null)
{
return(false);
}
return(ServiceType == key.ServiceType && Name == key.Name);
}
/// <summary>
/// Gets a registration matching the specified key.
/// </summary>
/// <param name="key">Key.</param>
public IServiceRegistration Get(ServiceRegistrationKey key)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
var candidates = GetCandidateRegistrations(key).OrderByDescending(x => x.Priority);
return(candidates.FirstOrDefault());
}
/// <summary>
/// Gets a value which indicates whether or not a matching registration is contained within the current instance.
/// </summary>
/// <param name="key">A service registration key.</param>
public bool Contains(ServiceRegistrationKey key)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
var candidates = GetCandidateRegistrations(key);
return(candidates.Any());
}
bool IServiceRegistrationProvider.CanFulfilRequest(ResolutionRequest request)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
var key = ServiceRegistrationKey.FromRequest(request);
return(Contains(key));
}
IServiceRegistration IServiceRegistrationProvider.Get(ResolutionRequest request)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
var key = ServiceRegistrationKey.FromRequest(request);
return(Get(key));
}
/// <summary>
/// Gets a value that indicates whether or not the current registration matches the specified registration key or not.
/// </summary>
/// <returns>
/// <c>true</c>, if the current instance matches the specified key, <c>false</c> otherwise.</returns>
/// <param name="key">The registration key against which to test.</param>
public override bool MatchesKey(ServiceRegistrationKey key)
{
if (base.MatchesKey(key))
{
return(true);
}
if (key == null)
{
return(false);
}
return(key.ServiceType.GetTypeInfo().IsAssignableFrom(ImplementationType.GetTypeInfo()) && Name == key.Name);
}
/// <summary>
/// Gets a value that indicates whether or not the current registration matches the specified registration key or not.
/// </summary>
/// <returns>
/// <c>true</c>, if the current instance matches the specified key, <c>false</c> otherwise.</returns>
/// <param name="key">The registration key against which to test.</param>
public override bool MatchesKey(ServiceRegistrationKey key)
{
if (key == null)
{
return(false);
}
if (!key.ServiceType.GetTypeInfo().IsGenericType)
{
return(false);
}
var openGenericKeyType = key.ServiceType.GetGenericTypeDefinition();
return(openGenericKeyType == ServiceType);
}
/// <summary>
/// Add the specified component registration.
/// </summary>
/// <param name="registration">Registration.</param>
public void Add(IServiceRegistration registration)
{
if (registration == null)
{
throw new ArgumentNullException(nameof(registration));
}
registration.AssertIsValid();
var key = ServiceRegistrationKey.ForRegistration(registration);
lock (syncRoot)
{
IServiceRegistration removed;
registrations.TryRemove(key, out removed);
registrations.TryAdd(key, registration);
}
}
IReadOnlyList <IServiceRegistration> GetCandidateRegistrations(ServiceRegistrationKey key)
{
var output = new List <IServiceRegistration>();
lock (syncRoot)
{
IServiceRegistration exactMatch;
if (registrations.TryGetValue(key, out exactMatch))
{
output.Add(exactMatch);
}
var otherMatches = (from registration in registrations.Values
where
registration.MatchesKey(key) &&
(exactMatch == null || !ReferenceEquals(registration, exactMatch))
select registration)
.ToArray();
output.AddRange(otherMatches);
}
return(output.ToArray());
}
