public void Select(Statement template, StatementSink sink)
{
// extract the fields for easy access
Entity subj = template.Subject;
Entity pred = template.Predicate;
Resource obj = template.Object;
// convert the SemWeb fields to the RDFQuery fields
Uri s;
string p, o;
rdf_to_beagle_hook(subj, pred, obj, out s, out p, out o);
RDFQuery query = new RDFQuery(s, p, o);
RDFQueryResult result = (RDFQueryResult)query.Send();
foreach (Hit hit in result.Hits)
{
Entity subject = new Entity(hit.Uri.ToString()); //FIXME: Do we have to use strings here?
foreach (Property prop in hit.Properties)
{
Entity predicate = BeaglePropertyToEntity(prop.Type, prop.Key);
Resource _object;
property_to_rdf_hook(prop, out _object);
// now create a the statement and add it to the result
Statement st = new Statement(subject, predicate, _object);
sink.Add(st);
}
}
}
static public ArrayList DoRDFQuery(RDFQuery query)
{
ArrayList all_results = new ArrayList();
try {
iqueryable_lock.AcquireReaderLock(System.Threading.Timeout.Infinite);
foreach (Queryable q in Queryables)
{
if (!q.AcceptQuery(query))
{
continue;
}
ICollection results = q.DoRDFQuery(query);
if (results == null || results.Count == 0)
{
continue;
}
all_results.AddRange(results);
}
} finally {
iqueryable_lock.ReleaseReaderLock();
}
return(all_results);
}
public override ResponseMessage Execute(RequestMessage request)
{
RDFQueryResult result = new RDFQueryResult();
RDFQuery query = request as RDFQuery;
if (query == null)
{
return(new ErrorResponse("Only RDF query please!"));
}
result.Hits = QueryDriver.DoRDFQuery(query);
return(result);
}
public static void Main(string[] args)
{
if (args.Length != 3)
{
Console.WriteLine("Usage: program-name <subject> <predicate> <object>");
Console.WriteLine(" <subject> : URI or path");
Console.WriteLine(" <predicate> : property name (string)");
Console.WriteLine(" <object> : object (string)");
Console.WriteLine(" Use \"\" (empty string) for unspecified subject, predicate, type or object");
return;
}
RDFQueryResult result;
Console.WriteLine("subject:'{0}' predicate:'{1}' object:'{2}'", args [0], args [1], args [2]);
Uri subject = null;
if (args [0] != String.Empty)
{
subject = new Uri(args [0]);
}
RDFQuery query = new RDFQuery(subject, args [1], args [2]);
result = (RDFQueryResult)query.Send();
if (result == null)
{
Console.WriteLine("null.......");
return;
}
foreach (Hit hit in result.Hits)
{
foreach (Property prop in hit.Properties)
{
Console.WriteLine("<{0}> <{1}> \"{2}\" .",
hit.Uri,
prop.Key,
prop.Value);
}
}
}
public static void Main (string[] args)
{
if (args.Length != 3) {
Console.WriteLine ("Usage: program-name <subject> <predicate> <object>");
Console.WriteLine (" <subject> : URI or path");
Console.WriteLine (" <predicate> : property name (string)");
Console.WriteLine (" <object> : object (string)");
Console.WriteLine (" Use \"\" (empty string) for unspecified subject, predicate, type or object");
return;
}
RDFQueryResult result;
Console.WriteLine ("subject:'{0}' predicate:'{1}' object:'{2}'", args [0], args [1], args [2]);
Uri subject = null;
if (args [0] != String.Empty)
subject = new Uri (args [0]);
RDFQuery query = new RDFQuery (subject, args [1], args [2]);
result = (RDFQueryResult) query.Send ();
if (result == null) {
Console.WriteLine ("null.......");
return;
}
foreach (Hit hit in result.Hits) {
foreach (Property prop in hit.Properties)
Console.WriteLine ("<{0}> <{1}> \"{2}\" .",
hit.Uri,
prop.Key,
prop.Value);
}
}
public void Select (Statement template, StatementSink sink)
{
// extract the fields for easy access
Entity subj = template.Subject;
Entity pred = template.Predicate;
Resource obj = template.Object;
// convert the SemWeb fields to the RDFQuery fields
Uri s;
string p, o;
rdf_to_beagle_hook (subj, pred, obj, out s, out p, out o);
RDFQuery query = new RDFQuery (s, p, o);
RDFQueryResult result = (RDFQueryResult) query.Send ();
foreach (Hit hit in result.Hits) {
Entity subject = new Entity (hit.Uri.ToString ()); //FIXME: Do we have to use strings here?
foreach (Property prop in hit.Properties) {
Entity predicate = BeaglePropertyToEntity (prop.Type, prop.Key);
Resource _object;
property_to_rdf_hook (prop, out _object);
// now create a the statement and add it to the result
Statement st = new Statement (subject, predicate, _object);
sink.Add (st);
}
}
}
static public ArrayList DoRDFQuery (RDFQuery query)
{
ArrayList all_results = new ArrayList ();
try {
iqueryable_lock.AcquireReaderLock (System.Threading.Timeout.Infinite);
foreach (Queryable q in Queryables) {
if (! q.AcceptQuery (query))
continue;
ICollection results = q.DoRDFQuery (query);
if (results == null || results.Count == 0)
continue;
all_results.AddRange (results);
}
} finally {
iqueryable_lock.ReleaseReaderLock ();
}
return all_results;
}
