public override int CompareTo(RDFDataset.Node o)
{
if (o == null)
{
// valid nodes are > null nodes
return(1);
}
if (o.IsIRI())
{
// literals < iri
return(-1);
}
if (o.IsBlankNode())
{
// blank node < iri
return(-1);
}
if (this.GetLanguage() == null && ((RDFDataset.Literal)o).GetLanguage() != null)
{
return(-1);
}
else
{
if (this.GetLanguage() != null && ((RDFDataset.Literal)o).GetLanguage() == null)
{
return(1);
}
}
if (this.GetDatatype() != null)
{
return(string.CompareOrdinal(this.GetDatatype(), ((RDFDataset.Literal)o).GetDatatype
()));
}
else
{
if (((RDFDataset.Literal)o).GetDatatype() != null)
{
return(-1);
}
}
return(0);
}
internal static string ToNQuad(RDFDataset.Quad triple, string graphName, string bnode
)
{
RDFDataset.Node s = triple.GetSubject();
RDFDataset.Node p = triple.GetPredicate();
RDFDataset.Node o = triple.GetObject();
string quad = string.Empty;
// subject is an IRI or bnode
if (s.IsIRI())
{
quad += "<" + Escape(s.GetValue()) + ">";
}
else
{
// normalization mode
if (bnode != null)
{
quad += bnode.Equals(s.GetValue()) ? "_:a" : "_:z";
}
else
{
// normal mode
quad += s.GetValue();
}
}
if (p.IsIRI())
{
quad += " <" + Escape(p.GetValue()) + "> ";
}
else
{
// otherwise it must be a bnode (TODO: can we only allow this if the
// flag is set in options?)
quad += " " + Escape(p.GetValue()) + " ";
}
// object is IRI, bnode or literal
if (o.IsIRI())
{
quad += "<" + Escape(o.GetValue()) + ">";
}
else
{
if (o.IsBlankNode())
{
// normalization mode
if (bnode != null)
{
quad += bnode.Equals(o.GetValue()) ? "_:a" : "_:z";
}
else
{
// normal mode
quad += o.GetValue();
}
}
else
{
string escaped = Escape(o.GetValue());
quad += "\"" + escaped + "\"";
if (JSONLDConsts.RdfLangstring.Equals(o.GetDatatype()))
{
quad += "@" + o.GetLanguage();
}
else
{
if (!JSONLDConsts.XsdString.Equals(o.GetDatatype()))
{
quad += "^^<" + Escape(o.GetDatatype()) + ">";
}
}
}
}
// graph
if (graphName != null)
{
if (graphName.IndexOf("_:") != 0)
{
quad += " <" + Escape(graphName) + ">";
}
else
{
if (bnode != null)
{
quad += " _:g";
}
else
{
quad += " " + graphName;
}
}
}
quad += " .\n";
return(quad);
}
