private static ReadOnlyCollection <IInstanceCreator> GetInstanceCreators(Type targetType)
{
Debug.Assert(targetType != null);
Debug.Assert(targetType.IsVisible);
// If creators have not been cached, or are in the process of being cached, take lock and re-check cache.
ReadOnlyCollection <IInstanceCreator> cached;
if (!creatorCache_.TryGetValue(targetType, out cached) || object.ReferenceEquals(cached, TempCreators))
{
bool isInstanceCreator = targetType.IsGenericType && targetType.GetGenericTypeDefinition( ) == typeof(IInstanceCreator <>);
Type[] availableTypes = isInstanceCreator ? null : TypeLoader.GetUsableTypes(targetType).ToArray( );
lock ( creatorCacheLock_ ) {
if (!TypeCreator.creatorCache_.ContainsKey(targetType))
{
TypeCreator.creatorCache_[targetType] = TempCreators;
ReadOnlyCollection <IInstanceCreator> creators;
// If target type is for IInstanceCreator<T>, wrap creators for T.
if (isInstanceCreator)
{
Type innerTargetType = targetType.GetGenericArguments( )[0];
var innerCreators = TypeCreator.GetCreators(innerTargetType);
var outerCreators = new IInstanceCreator[innerCreators.Count];
for (int i = 0; i < outerCreators.Length; ++i)
{
outerCreators[i] = WeakInstanceCreator.ForInstanceCreator(targetType, innerCreators[i]);
}
creators = outerCreators.ToReadOnlyCollection( );
}
// Otherwise, get creators for type directly.
else
{
creators = GetInstanceCreators(targetType, availableTypes);
}
TypeCreator.creatorCache_[targetType] = creators;
}
}
}
return(TypeCreator.creatorCache_[targetType]);
}
