public SparqlStrDataType(SparqlExpression sparqlExpression1, SparqlExpression sparqlExpression2, NodeGenerator q)
{
// TODO: Complete member initialization
switch (NullablePairExt.Get(sparqlExpression1.Const, sparqlExpression2.Const))
{
case NP.bothNull:
TypedOperator = result => q.CreateLiteralNode((string)sparqlExpression1.Operator(result), (string)sparqlExpression2.Operator(result));
Operator = res => sparqlExpression1.Operator(res);
AggregateLevel = SetAggregateLevel(sparqlExpression1.AggregateLevel, sparqlExpression2.AggregateLevel);
break;
case NP.leftNull:
TypedOperator = result => q.CreateLiteralNode((string)sparqlExpression1.Operator(result), (string)sparqlExpression2.Const.Content);
Operator = res => sparqlExpression1.Operator(res);
AggregateLevel = sparqlExpression1.AggregateLevel;
break;
case NP.rigthNull:
TypedOperator = result => q.CreateLiteralNode((string)sparqlExpression1.Const.Content, (string)sparqlExpression2.Operator(result));
Operator = res => sparqlExpression1.Const.Content;
AggregateLevel = sparqlExpression2.AggregateLevel;
break;
case NP.bothNotNull:
Const = q.CreateLiteralNode((string)sparqlExpression1.Const.Content, (string)sparqlExpression2.Const.Content);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
void Rdfliteral(out ObjectVariants value)
{
value = null;
String();
string str = t.val;
if (la.kind == 5 || la.kind == 26)
{
if (la.kind == 5)
{
Get();
value = new OV_langstring(str.Trim('"', '\''), t.val);
}
else
{
Get();
string literalType;
Iri(out literalType);
value = ng.CreateLiteralNode(str, literalType);
}
}
if (value == null)
{
value = new OV_string(str.Trim('"', '\''));
}
}
public static IEnumerable <TripleStrOV> LoadGraph(string datafile)
{
int ntriples = 0;
string subject = null;
Dictionary <string, string> namespaces = new Dictionary <string, string>();
StreamReader sr = new StreamReader(datafile);
int count = 2000000000;
for (int i = 0; i < count; i++)
{
string line = sr.ReadLine();
//if (i % 10000 == 0) { Console.Write("{0} ", i / 10000); }
if (line == null)
{
break;
}
if (line == "")
{
continue;
}
if (line[0] == '@')
{ // namespace
string[] parts = line.Split(' ');
if (parts.Length != 4 || parts[0] != "@prefix" || parts[3] != ".")
{
Console.WriteLine("Err: strange line: " + line);
continue;
}
string pref = parts[1];
string nsname = parts[2];
if (nsname.Length < 3 || nsname[0] != '<' || nsname[nsname.Length - 1] != '>')
{
Console.WriteLine("Err: strange nsname: " + nsname);
continue;
}
nsname = nsname.Substring(1, nsname.Length - 2);
namespaces.Add(pref, nsname);
}
else if (line[0] != ' ')
{ // Subject
line = line.Trim();
subject = GetEntityString(namespaces, line);
if (subject == null)
{
continue;
}
}
else
{ // Predicate and object
string line1 = line.Trim();
int first_blank = line1.IndexOf(' ');
if (first_blank == -1)
{
Console.WriteLine("Err in line: " + line); continue;
}
string pred_line = line1.Substring(0, first_blank);
string predicate = GetEntityString(namespaces, pred_line);
string rest_line = line1.Substring(first_blank + 1).Trim();
// Уберем последний символ
rest_line = rest_line.Substring(0, rest_line.Length - 1).Trim();
bool isDatatype = rest_line[0] == '\"';
// объект может быть entity или данное, у данного может быть языковый спецификатор или тип
string entity = null;
string sdata = null;
string datatype = null;
string lang = null;
if (isDatatype)
{
// Последняя двойная кавычка
int lastqu = rest_line.LastIndexOf('\"');
// Значение данных
sdata = rest_line.Substring(1, lastqu - 1);
// Языковый специализатор:
int dog = rest_line.LastIndexOf('@');
if (dog == lastqu + 1)
{
lang = rest_line.Substring(dog + 1, rest_line.Length - dog - 1);
}
int pp = rest_line.IndexOf("^^");
if (pp == lastqu + 1)
{
// Тип данных
string qname = rest_line.Substring(pp + 2);
// тип данных может быть "префиксным" или полным
if (qname[0] == '<')
{
datatype = qname.Substring(1, qname.Length - 2);
}
else
{
datatype = GetEntityString(namespaces, qname);
}
}
yield return(new TripleStrOV(subject, predicate,
lang != null
? new OV_langstring(sdata, lang)
: datatype != null
? Generator.CreateLiteralNode(sdata, datatype)
: new OV_string(sdata)));
}
else
{
// entity
entity = rest_line[0] == '<'
? rest_line.Substring(1, rest_line.Length - 2)
: GetEntityString(namespaces, rest_line);
yield return(new TripleStrOV(subject, predicate,
new OV_iri(entity)));
}
ntriples++;
}
}
Console.WriteLine("ntriples={0}", ntriples);
}
