public UrlsRepository(string virtualPathPrefix)
{
if (string.IsNullOrEmpty(virtualPathPrefix))
{
throw new ArgumentNullException("virtualPath");
}
this.VirtualPathPrefix = virtualPathPrefix.ToLower();
FileLazy = GlobalLazy.WithoutInvalidations(() => new StaticContentResult(CreateFile(), fileName));
}
private ResetLazy <HashSet <K> > GetAllKeysLazy <T, KVP, K>(Expression <Func <T, IEnumerable <KVP> > > collectionSelector, Expression <Func <KVP, K> > keySelector)
where T : Entity
{
if (typeof(K).IsEnum)
{
return(new ResetLazy <HashSet <K> >(() => EnumExtensions.GetValues <K>().ToHashSet()));
}
if (typeof(K).IsLite())
{
return(GlobalLazy.WithoutInvalidations(() => Database.RetrieveAllLite(typeof(K).CleanType()).Cast <K>().ToHashSet()));
}
if (collectionSelector.Body.Type.IsMList())
{
var lambda = Expression.Lambda <Func <T, MList <KVP> > >(collectionSelector.Body, collectionSelector.Parameters);
return(GlobalLazy.WithoutInvalidations(() => Database.MListQuery(lambda).Select(kvp => keySelector.Evaluate(kvp.Element)).Distinct().ToHashSet()));
}
else
{
return(GlobalLazy.WithoutInvalidations(() => Database.Query <T>().SelectMany(collectionSelector).Select(keySelector).Distinct().ToHashSet()));
}
}
