/// <summary>
/// Generates a SPARQL Service Description Graph for the given Protocol Handler Configuration or uses the configuration supplied Description Graph
/// </summary>
/// <param name="context">HTTP Context</param>
/// <param name="config">Protocol Handler Configuration</param>
/// <param name="descripUri">Base URI of the Description</param>
/// <returns></returns>
public static IGraph GetServiceDescription(HttpContext context, BaseProtocolHandlerConfiguration config, Uri descripUri)
{
//Use user specified Service Description if present
if (config.ServiceDescription != null)
{
return(config.ServiceDescription);
}
IGraph g = SparqlServiceDescriber.GetNewGraph();
//Add the Top Level Node representing the Service
IUriNode descrip = g.CreateUriNode(descripUri);
IUriNode rdfType = g.CreateUriNode(new Uri(RdfSpecsHelper.RdfType));
IUriNode service = g.CreateUriNode("sd:" + ClassService);
g.Assert(descrip, rdfType, service);
//Add its sd:url
IUriNode url = g.CreateUriNode("sd:" + PropertyUrl);
g.Assert(descrip, url, descrip);
//Add the Input Formats
IUriNode inputFormat = g.CreateUriNode("sd:" + PropertyInputFormat);
foreach (MimeTypeDefinition definition in MimeTypesHelper.Definitions)
{
if (definition.CanParseRdf)
{
if (definition.FormatUri != null)
{
g.Assert(descrip, inputFormat, g.CreateUriNode(new Uri(definition.FormatUri)));
}
}
}
//Add the Result Formats
IUriNode resultFormat = g.CreateUriNode("sd:" + PropertyResultFormat);
foreach (MimeTypeDefinition definition in MimeTypesHelper.Definitions)
{
if (definition.CanWriteRdf)
{
if (definition.FormatUri != null)
{
g.Assert(descrip, resultFormat, g.CreateUriNode(new Uri(definition.FormatUri)));
}
}
}
config.AddFeatureDescription(g, descrip);
return(g);
}
