|
public GetIncomingTriplets ( string predicate, string obj ) : List |
||
| predicate | string | Optional predicate name |
| obj | string | Object full name |
| Результат | List |
|
public List<Triple> GetIncomingTriplets(string predicate, string obj)
{
var objectName = EnsurePrefix(TripleName.Parse(obj)).ToString();
IQueryable<Triple> triples;
if (!String.IsNullOrEmpty(predicate))
{
var predicateName = EnsurePrefix(TripleName.Parse(predicate)).ToString();
triples = Triples.Where(t => t.Predicate == predicateName);
}
else
// Not very efficient as it enumerates entire database
triples = Triples;
return triples.
Include(o => o.Objects). // Include Objects collection
Where(t => t.Objects.Any(o => o.Object == objectName)).
ToArray(). // Stop LINQ to SQL and use simple collection transformations
Select(t => new Triple {
Subject = t.Subject,
Predicate = t.Predicate,
Objects = new Collection<TripleObject>(t.Objects.Where(o => o.Object == objectName).ToArray())
}).ToList();
}
public IEnumerable<Entities.Triple> GetTriplets(string subject, string predicate, string @object)
{
try
{
using (var storage = new Storage())
return subject == null?
storage.GetIncomingTriplets(predicate,@object) :
storage.GetTriplet(
HttpUtility.UrlDecode(subject),
predicate == null ? null : HttpUtility.UrlDecode(predicate),
@object == null ? null : HttpUtility.UrlDecode(@object));
}
catch (ArgumentException exc)
{
SetStatusCode(HttpStatusCode.BadRequest, exc.Message);
return null;
}
}
