public static void WriteSerializedRepresentations(RDFSharp.Model.RDFGraph graph)
{
var serializationsByFormat = AvailableSerializationFormats.ToDictionary(
f => (object)f,
f => SerializeGraph(graph, f)
);
WriteLine($"JSON-LD representation of graph '{graph.Context}'");
var contentDocument = JsonLD.Core.JsonLdProcessor.FromRDF(
serializationsByFormat[RDFSharp.Model.RDFModelEnums.RDFFormats.NTriples],
new JsonLD.Impl.NQuadRDFParser());
var contextDocument = JToken.Parse("{ '@context': { '@vocab': 'http://xmlns.com/foaf/0.1/' } }");
contentDocument = JsonLD.Core.JsonLdProcessor.Compact(
contentDocument,
contextDocument,
new JsonLD.Core.JsonLdOptions());
serializationsByFormat["JSON-LD"] = contentDocument.ToString();
foreach (var kvp in serializationsByFormat)
{
WriteLine($"{kvp.Key} representation of graph '{graph.Context}'");
WriteLine();
WriteLine(kvp.Value);
WriteLine();
}
}
public static void WriteSerializedRepresentation(RDFSharp.Model.RDFGraph graph, RDFSharp.Model.RDFModelEnums.RDFFormats format)
{
var serialization = SerializeGraph(graph, format);
WriteLine($"{format} representation of graph '{graph.Context}'");
WriteLine();
WriteLine(serialization);
}
public static string SerializeGraph(RDFSharp.Model.RDFGraph graph, RDFSharp.Model.RDFModelEnums.RDFFormats format)
{
using (var buffer = new MemoryStream())
{
graph.ToStream(format, buffer);
var result = Encoding.UTF8.GetString(buffer.ToArray()).Trim();
return(result);
}
}
public static RDFSharp.Model.RDFGraph DeserializeGraphFromJsonLd(string data)
{
var result = new RDFSharp.Model.RDFGraph();
result.SetContext(new Uri("http://example.com/context/JsonLd"));
var token = (JsonLD.Core.RDFDataset)JsonLD.Core.JsonLdProcessor.ToRDF(JsonLD.Util.JSONUtils.FromString(data));
foreach (var quad in token.GetQuads("@default"))
{
var subject = ToRDFSharpObject(quad["subject"]);
var predicate = ToRDFSharpObject(quad["predicate"]);
var @object = ToRDFSharpObject(quad["object"]);
var triple = CreateTriple(subject, predicate, @object);
result.AddTriple(triple);
}
return(result);
}
private static RDFSharp.Model.RDFGraph ConstructGraph()
{
var result = new RDFSharp.Model.RDFGraph();
result.SetContext(new Uri("http://example.com/context/Local"));
var exampleNamespace = new RDFSharp.Model.RDFNamespace("ex", "http://example.com/");
RDFSharp.Model.RDFNamespaceRegister.AddNamespace(exampleNamespace);
result.AddTriple(new RDFSharp.Model.RDFTriple(
new RDFSharp.Model.RDFResource("ex:subject/001"),
RDFSharp.Model.RDFVocabulary.FOAF.FIRSTNAME, // Equivalent to RDFResource("foaf:firstName") which is equivalent to RDFResource("http://xmlns.com/foaf/0.1/firstName")
new RDFSharp.Model.RDFPlainLiteral("John")));
result.AddTriple(new RDFSharp.Model.RDFTriple(
new RDFSharp.Model.RDFResource("ex:subject/001"),
RDFSharp.Model.RDFVocabulary.FOAF.FAMILY_NAME,
new RDFSharp.Model.RDFPlainLiteral("Doe")));
return(result);
}
