note that regarding the code that I sent, it was probably enough to just add the @vocab node (removing the props in the ns is just a matter of clarity of the output, and of not wasting bandwidth).
> Le 20 févr. 2017 à 15:47, François-Paul Servant > <[email protected]> a écrit : > > Hi Elie, > > (I wrote the comment in the line you point to. And then forgot it). > > The fix is probably more than one line (it must take care of the other parts > of the definition of the “context" passed to the JSON-LD java API, and of the > behavior of that API when it includes an @vocab) > > I’ll try to see what can be done. In the meantime, you maybe can use a new > possibility in 3.2.0: you can access the object that jena creates and pass to > the JSON-LD java API. You can modify it before sending it to the JSON-LD java > API. Please find below a quick example. > > HTH > > fps > > /* Created on 20 févr. 2017 */ > package com.renault.sicg.rasse.commons; > > import java.io.IOException; > import java.io.PrintWriter; > import java.util.ArrayList; > import java.util.List; > import java.util.Map; > import java.util.Map.Entry; > > import org.apache.jena.query.DatasetFactory; > import org.apache.jena.rdf.model.Model; > import org.apache.jena.rdf.model.ModelFactory; > import org.apache.jena.rdf.model.Resource; > import org.apache.jena.riot.RDFFormat; > import org.apache.jena.riot.system.PrefixMap; > import org.apache.jena.riot.system.RiotLib; > import org.apache.jena.riot.writer.JsonLDWriter; > import org.apache.jena.sparql.core.DatasetGraph; > import org.apache.jena.sparql.util.Context; > import org.apache.jena.sparql.vocabulary.FOAF; > import org.apache.jena.vocabulary.RDF; > import org.junit.Test; > > import com.fasterxml.jackson.core.JsonParseException; > import com.github.jsonldjava.core.JsonLdError; > import com.github.jsonldjava.utils.JsonUtils; > > public class AtVocab { > @Test public final void test() throws JsonParseException, JsonLdError, > IOException { > Model m = ModelFactory.createDefaultModel(); > String ns = "http://schema.org/";; > Resource person = m.createResource(ns + "Person"); > Resource s = m.createResource(); > m.add(s, m.createProperty(ns + "name"), "Jane Doe"); > m.add(s, m.createProperty(ns + "url"), "http://www.janedoe.com";); > m.add(s, m.createProperty(ns + "jobTitle"), "Professor"); > m.add(s, FOAF.nick, "jd"); > m.add(s, RDF.type, person); > > m.setNsPrefix("", ns); > > DatasetGraph g = DatasetFactory.create(m).asDatasetGraph(); > PrefixMap pm = RiotLib.prefixMap(g); > String base = null; > Context jenaContext = null; > > // the JSON-LD API object. It's a map > Map map = (Map) > JsonLDWriter.toJsonLDJavaAPI((RDFFormat.JSONLDVariant)RDFFormat.JSONLD.getVariant() > , g, pm, base, jenaContext); > > // get the @context: > Map<String, Object> ctx = (Map<String, Object>) map.get("@context"); > > // add the "@vocab" key, to ctx > // and remove from it declaration of props in ns > > // remove from ctx declaration of props in ns > List<String> remove = new ArrayList<>(); > for (Entry<String, Object> e : ctx.entrySet()) { > // is it the declaration of a prop in ns? > Object o = e.getValue(); > if (o instanceof Map) { > o = ((Map) o).get("@id"); > } > if ((o != null) && (o instanceof String)) { > if (((String) o).equals(ns + e.getKey())) { > remove.add(e.getKey()); > } > } > } > for (String key : remove) { > ctx.remove(key); > } > > // add the "@vocab" key to ctx > ctx.put("@vocab", "http://schema.org/";); > > JsonUtils.writePrettyPrint(new PrintWriter(System.out), map) ; > } > > } >
