|
public GetTriplet ( string subject, string predicate = null, string obj = null, bool expandPrefixes = false ) : List |
||
| subject | string | Subject name with prefix |
| predicate | string | Predicate name with prefix or null |
| obj | string | Object name with prefix or null |
| expandPrefixes | bool | If 'True' returns namespaces, else - prefixes. |
| Результат | List |
|
public List<Triple> GetTriplet(string subject, string predicate = null, string obj = null, bool expandPrefixes = false)
{
if(subject == null)
throw new ArgumentNullException("subject");
var subjectName = EnsurePrefix(TripleName.Parse(subject));
string subjectStr = subjectName.ToString();
IQueryable<Triple> triples;
if(predicate != null)
{
var predicateName = EnsurePrefix(TripleName.Parse(predicate));
var predicateStr = predicateName.ToString();
if (obj != null)
{
var objectName = EnsurePrefix(TripleName.Parse(obj));
var objectStr = objectName.ToString();
triples = Triples.Where(t => t.Subject == subjectStr && t.Predicate == predicateStr).Include(o => o.Objects).Where(t => t.Objects.FirstOrDefault(x => x.Object == objectStr) != null);
}
else
triples = Triples.Where(t => t.Subject == subjectStr && t.Predicate == predicateStr).Include(o => o.Objects);
}
else
triples = Triples.Where(t => t.Subject == subjectStr).Include(o => o.Objects);
if (expandPrefixes)
{
//ToDo:Use Join
triples.ToList().ForEach(x =>
{
x.Subject = TryEnsureNamespace(TripleName.Parse(x.Subject)).ToExpandedString();
x.Predicate = TryEnsureNamespace(TripleName.Parse(x.Predicate)).ToExpandedString();
foreach (var o in x.Objects)
o.Object = TryEnsureNamespace(TripleName.Parse(o.Object)).ToExpandedString();
});
}
return triples.ToList();
}
public IEnumerable<Entities.Triple> GetTriplets(string subject, string predicate, string @object)
{
try
{
using (var storage = new Storage())
return 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;
}
}
