/// <summary>
/// Get all the predicates from the triples with given subject IRI, sorted according to the popularity of predicates
/// </summary>
public static async Task RetrievePredicatesAndObjectCounts(PredicateResultWrapperList list, string subjectIri, string language, SparqlRemoteEndpoint endpoint)
{
Config.AssertAbsoluteUri(subjectIri);
SparqlQuery query = QueryCreating.CreateQuery(QueryTemplates.SelectDistinctPredicateAndObjectCount, subjectIri, language);
var holder = await RetrieveResultHolder(query, endpoint);
foreach (var result in holder.QueryResultSet)
{
var predicate = await CreatePredicateNodeFromSparqlResult(subjectIri, holder.QueryEndpoint, result);
list.InsertPredicateWrapper(predicate);
}
list.Sort();
}
/// <summary>
/// Get all the predicates from the triples with given subject IRI from multiple endpoints, sorted according to the popularity of predicates
/// </summary>
public static async Task RetrievePredicatesAndObjectCounts(PredicateResultWrapperList list, string subjectIri, string language, List <SparqlRemoteEndpoint> endpoints)
{
Config.AssertAbsoluteUri(subjectIri);
SparqlQuery query = QueryCreating.CreateQuery(QueryTemplates.SelectDistinctPredicateAndObjectCount, subjectIri, language);
/*** create tasks ***/
List <Task <ResultHolder> > tasks = new List <Task <ResultHolder> >(capacity: endpoints.Count);
try
{
foreach (var endpoint in endpoints)
{
tasks.Add(RetrieveResultHolder(query, endpoint));
}
}
catch (Exception)
{
throw;
}
/*** process results ***/
try
{
foreach (var task in tasks)
{
var endpoint = task.Result.QueryEndpoint;
foreach (var result in task.Result.QueryResultSet)
{
var predicate = await CreatePredicateNodeFromSparqlResult(subjectIri, endpoint, result);
list.InsertPredicateWrapper(predicate);
}
}
}
catch (AggregateException)
{
throw;
}
catch (Exception)
{
throw;
}
list.Sort();
//TODO: handle duplicates
}
public async Task <ActionResult> EntityResultOnePredicate(OnePredicateInfo predicateInfo)
{
if (predicateInfo == null)
{
return(BadRequest());
}
ViewData[nameof(SearchInfo)] = predicateInfo;
var queryResultWrappertList = new PredicateResultWrapperList();
try
{
/*** validation ***/
predicateInfo.Validate();
/*** search preparation ***/
SparqlRemoteEndpoint endpoint = SearchPreparing.CreateEndpoint(predicateInfo.Endpoints[0], predicateInfo.Timeout, predicateInfo.DefaultGraph);
/*** preparing the predicate ***/
queryResultWrappertList.InsertPredicateWrapper(predicateInfo.EntityIri, predicateInfo.PredicateIri, endpoint, predicateInfo.ExpectedObjects);
/*** getting objects ***/
await ResultRetrieving.RetrieveObjects(queryResultWrappertList, predicateInfo.EntityIri, predicateInfo.Language);
//ViewData["ExecutionTime"] = query.QueryExecutionTime;
ViewData[nameof(OnePredicateInfo.EntityIri)] = predicateInfo.EntityIri;
}
catch (BrowserException e)
{
return(View("QueryResultError", e.Message));
}
catch (InternalErrorException)
{
return(StatusCode(503));
}
catch (Exception)
{
//TODO: better text
return(View("QueryResultError", "Unknown error..."));
}
return(View("EntityResultOnePredicate", queryResultWrappertList));
}