private Node <UriOrBlank> LoadSampleData(IRdfData data, Node <UriOrBlank> g)
{
var me = data.Uri("x:me");
var link = data.Uri("a:linkTo");
var name = data.Uri("a:name");
data.Update.From(g)
.For(me)
.With(link)
.Add(data.Uri("http://my.blog"))
.Then()
.With(name).Add(data.New("My Name"));
return(g);
}
public RdfDataFetcher(IRdfData rdf)
{
_rdf = rdf;
BackingFile = _rdf.Uri("sys:/backingFile");
if (!_rdf.Stats().Mappings.Any(x => x is FileInfoNodeMap))
{
throw new Exception(
$"Must include node map {nameof(FileInfoNodeMap)}");
}
}
/// <summary>
/// (re)loads file data; existing graph data is overwritten.
/// </summary>
/// <returns>
/// Self graph for loaded data.
/// </returns>
public async Task <Graph> Load(Node <FileInfo> file)
{
var id = _rdf.Uri(file.Value.AsUri());
var g = _rdf.GetSelfGraph(id);
g.Clear();
await new NTripleFile(file.Value)
.Read(g);
_rdf.GetSelfGraph(_rdf.System)
.Update
.For(id).With(BackingFile)
.Set(file);
return(g);
}
/// <inheritdoc /> public UriNode Uri(ReadOnlySpan <char> uriValue) => _rdf.Uri(uriValue);
/// <summary>Get self graph: graph contains only its own quads</summary> public static Graph GetSelfGraph(this IRdfData rdf, string graphUri) => rdf.GetGraph(rdf.Uri(graphUri), Enumerable.Empty <Node <UriOrBlank> >());
/// <summary>Get full graph: graph contains all current quads.</summary> public static Graph GetFullGraph(this IRdfData rdf, string graphUri) => rdf.GetGraph(rdf.Uri(graphUri), rdf.GraphIds);