afs commented on code in PR #3502:
URL: https://github.com/apache/jena/pull/3502#discussion_r2413478393
##########
jena-arq/src/main/java/org/apache/jena/riot/writer/JsonLD11Writer.java:
##########
@@ -116,29 +116,85 @@ public Lang getLang() {
FmtLog.warn(this.getClass(), "Output is not a JSON object
(%s)", writeThis.getClass().getSimpleName());
}
- JsonWriter jsonWriter = startWrite(output, writer, indented);
- jsonWriter.write(writeThis);
- finishWrite(output, writer, indented);
+ writeJson(writeThis, output, writer, indented);
} catch (Throwable ex) {
throw new JenaException("Exception while writing JSON-LD 1.1", ex);
}
}
+ /** Jena DatasetGraph to JSON(LD), Titanium QuadsToJsonld in version
1.7.0. */
+ private static JsonArray datasetToJSON(DatasetGraph dsg) throws
JsonLdError {
+ QuadsToJsonld consumer = JsonLd.fromRdf();
+ consumer.mode(JsonLdVersion.V1_1);
+ dsg.stream().forEach( quad->{
+ String s = resource(quad.getSubject());
+ String p = resource(quad.getPredicate());
+ String g = resourceGraphName(quad.getGraph());
+ Node obj = quad.getObject();
+
+ if ( obj.isURI() || obj.isBlank() ) {
+ String o = resource(obj);
+ try {
+ consumer.quad(s, p, o, null, null, null, g);
+ } catch (RdfConsumerException e) {
+ e.printStackTrace();
+ }
+ } else if ( obj.isLiteral() ) {
+ String lex = obj.getLiteralLexicalForm();
+ String datatype = obj.getLiteralDatatypeURI();
+ String lang = obj.getLiteralLanguage();
+ if ( lang.isEmpty() )
+ lang = null;
+ String dir = null;
+ if ( obj.getLiteralBaseDirection() != null )
+ dir = obj.getLiteralBaseDirection().toString();
+ try {
+ consumer.quad(s, p, lex, datatype, lang, dir, g);
+ } catch (RdfConsumerException e) {
+ e.printStackTrace();
+ }
+ } else if ( obj.isTripleTerm() ) {
+ throw new JenaTitaniumException("Encountered a triple term");
Review Comment:
They (JSON-LD WG) do have a design for triple terms. Titanium JSON-LD does
not support them, only incompatible "RDF*", which is not RDF 1.2.
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