/// <summary>Outputs the RDF dataset found in the given JSON-LD object.</summary>
/// <remarks>Outputs the RDF dataset found in the given JSON-LD object.</remarks>
/// <param name="input">the JSON-LD input.</param>
/// <param name="callback"></param>
/// <param name="options"></param>
/// <exception cref="JsonLdError"></exception>
public static async Task <object> ToRdfAsync(JToken input,
IJsonLdTripleCallback callback,
JsonLdOptions options)
{
JToken expandedInput = await ExpandAsync(input, options);
var api = await JsonLdApi.CreateAsync(expandedInput, options);
var dataset = api.ToRdf();
// generate namespaces from context
if (options.useNamespaces)
{
JArray _input;
if (input is JArray array)
{
_input = array;
}
else
{
_input = new JArray();
_input.Add((JObject)input);
}
foreach (var e in _input)
{
if (((JObject)e).ContainsKey("@context"))
{
dataset.ParseContext((JObject)e["@context"]);
}
}
}
if (callback != null)
{
return(callback.Call(dataset));
}
if (options.format != null)
{
if ("application/nquads".Equals(options.format))
{
return(new NQuadTripleCallback().Call(dataset));
}
else
{
if ("text/turtle".Equals(options.format))
{
return(new TurtleTripleCallback().Call(dataset));
}
throw new JsonLdError(JsonLdError.Error.UnknownFormat, options.format);
}
}
return(dataset);
}
/// <exception cref="JsonLdError"></exception>
public static async Task <JObject> FrameAsync(JToken input,
JToken frame,
JsonLdOptions options)
{
if (frame is JObject)
{
frame = JsonLdUtils.Clone((JObject)frame);
}
// TODO string/IO input
JToken expandedInput = await ExpandAsync(input, options);
var expandedFrame = await ExpandAsync(frame, options);
var api = await JsonLdApi.CreateAsync(expandedInput, options);
var framed = api.Frame(expandedInput, expandedFrame);
var activeCtx = await api.context.ParseAsync(frame["@context"
]);
var compacted = api.Compact(activeCtx, null, framed);
if (!(compacted is JArray))
{
compacted = new JArray {
compacted
};
}
var alias = activeCtx.CompactIri("@graph");
var rval = activeCtx.Serialize();
rval[alias] = compacted;
JsonLdUtils.RemovePreserve(activeCtx, rval, options);
return(rval);
}