public async Task <ActionResult> QueryResult(QueryInfo queryInfo)
{
if (queryInfo == null)
{
return(BadRequest());
}
ViewData[nameof(SearchInfo)] = queryInfo;
object results;
try
{
/*** validation ***/
queryInfo.Validate();
/*** query preparation ***/
SparqlRemoteEndpoint endpoint = SearchPreparing.CreateEndpoint(queryInfo.Endpoints[0], queryInfo.Timeout, queryInfo.DefaultGraph);
SparqlQuery query = QueryParsing.ParseQuery(queryInfo.QueryString);
/*** query processing ***/
results = await QueryProcessing.ProcessQuery(query, endpoint);
//ViewData["ExecutionTime"] = query.QueryExecutionTime;
}
catch (BrowserException e)
{
return(View("QueryResultError", e.Message));
}
catch (Exception)
{
//TODO: better text
return(View("QueryResultError", "Unknown error..."));
}
/*** result processing ***/
if (results is SparqlResultSet)
{
return(View("QueryResultSet", (SparqlResultSet)results));
}
else if (results is IGraph)
{
return(View("QueryResultGraph", (IGraph)results));
}
else if (results is AsyncError)
{
return(View("QueryResultError", ErrorProcessing.ProcessAsyncError((AsyncError)results)));
}
else
{
//TODO: better text
return(View("QueryResultError", "Unknown error..."));
}
}
private static async Task <Dictionary <string, int> > RetrievePopularPropertiesFromEndpoint()
{
string errorMessage = "";
object results = null;
try
{
SparqlQuery query = QueryParsing.ParseQuery(QueryCreating.GetQueryTemplateCopy(QueryTemplates.SelectPopularProperties));
SparqlRemoteEndpoint endpoint = SearchPreparing.CreateEndpoint(Config.LOV_SPARQL_ENDPOINT, Config.LOV_PREDICATES_SEARCH_TIMEOUT);
results = await QueryProcessing.ProcessQuery(query, endpoint);
}
catch (BrowserException)
{
throw;
}
catch (Exception e)
{
throw new BrowserException("An unexpected error occured while retrieving the list of popular predicates.", e);
}
if (results is SparqlResultSet)
{
return(ResultSetToDictionary((SparqlResultSet)results));
}
else if (results is AsyncError)
{ /*TODO: remove exceptions */
throw ((AsyncError)results).Error.InnerException;
//errorMessage += ResultProcessing.ProcessAsyncError((AsyncError)results);
//return null;
}
/*TODO: remove exceptions*/
throw new Exception(errorMessage);
//otherwise it should be null and errorMessage should be already set
//return null;
}
