@Override
public void endRDF() throws RDFHandlerException {
final SesameRDFParser serialiser = new SesameRDFParser();
try {
Object output = JsonLdProcessor.fromRDF(model, serialiser);
final JSONLDMode mode = getWriterConfig().get(JSONLDSettings.JSONLD_MODE);
final JsonLdOptions opts = new JsonLdOptions();
// opts.addBlankNodeIDs =
// getWriterConfig().get(BasicParserSettings.PRESERVE_BNODE_IDS);
opts.setUseRdfType(getWriterConfig().get(JSONLDSettings.USE_RDF_TYPE));
opts.setUseNativeTypes(getWriterConfig().get(JSONLDSettings.USE_NATIVE_TYPES));
// opts.optimize = getWriterConfig().get(JSONLDSettings.OPTIMIZE);
if (mode == JSONLDMode.EXPAND) {
output = JsonLdProcessor.expand(output, opts);
}
// TODO: Implement inframe in JSONLDSettings
final Object inframe = null;
if (mode == JSONLDMode.FLATTEN) {
output = JsonLdProcessor.frame(output, inframe, opts);
}
if (mode == JSONLDMode.COMPACT) {
final Map<String, Object> ctx = new LinkedHashMap<String, Object>();
addPrefixes(ctx, model.getNamespaces());
final Map<String, Object> localCtx = new HashMap<String, Object>();
localCtx.put("@context", ctx);
output = JsonLdProcessor.compact(output, localCtx, opts);
}
if (getWriterConfig().get(BasicWriterSettings.PRETTY_PRINT)) {
JSONUtils.writePrettyPrint(writer, output);
} else {
JSONUtils.write(writer, output);
}
} catch (final JsonLdError e) {
throw new RDFHandlerException("Could not render JSONLD", e);
} catch (final JsonGenerationException e) {
throw new RDFHandlerException("Could not render JSONLD", e);
} catch (final JsonMappingException e) {
throw new RDFHandlerException("Could not render JSONLD", e);
} catch (final IOException e) {
throw new RDFHandlerException("Could not render JSONLD", e);
}
}
@Test
public void triplesTest() throws IOException, JsonLdError {
final InputStream in =
getClass().getClassLoader().getResourceAsStream("testfiles/product.jsonld");
final Object input = JSONUtils.fromInputStream(in);
final ClerezzaTripleCallback callback = new ClerezzaTripleCallback();
final MGraph graph = (MGraph) JsonLdProcessor.toRDF(input, callback);
for (final Triple t : graph) {
System.out.println(t);
}
assertEquals("Graph size", 13, graph.size());
}
@Override
public void read(
InputStream in, String baseURI, ContentType ct, final StreamRDF output, Context context) {
try {
Object jsonObject = JSONUtils.fromInputStream(in);
JSONLDTripleCallback callback =
new JSONLDTripleCallback() {
@Override
// public Object call(Map<String, Object> dataset) {
public Object call(RDFDataset dataset) {
for (String gn : dataset.keySet()) {
Object x = dataset.get(gn);
if ("@default".equals(gn)) {
@SuppressWarnings("unchecked")
List<Map<String, Object>> triples = (List<Map<String, Object>>) x;
for (Map<String, Object> t : triples) {
Node s = createNode(t, "subject");
Node p = createNode(t, "predicate");
Node o = createNode(t, "object");
Triple triple = Triple.create(s, p, o);
output.triple(triple);
}
} else {
@SuppressWarnings("unchecked")
List<Map<String, Object>> quads = (List<Map<String, Object>>) x;
Node g = NodeFactory.createURI(gn); // Bnodes?
for (Map<String, Object> q : quads) {
Node s = createNode(q, "subject");
Node p = createNode(q, "subject");
Node o = createNode(q, "object");
output.triple(Triple.create(s, p, o));
}
}
}
return null;
}
};
JSONLD.toRDF(jsonObject, callback);
} catch (IOException e) {
e.printStackTrace();
} catch (JSONLDProcessingError e) {
e.printStackTrace();
}
}
@Test
public void curiesInContextTest() throws IOException, JsonLdError {
final InputStream in =
getClass().getClassLoader().getResourceAsStream("testfiles/curies-in-context.jsonld");
final Object input = JSONUtils.fromInputStream(in);
final ClerezzaTripleCallback callback = new ClerezzaTripleCallback();
final MGraph graph = (MGraph) JsonLdProcessor.toRDF(input, callback);
for (final Triple t : graph) {
System.out.println(t);
assertTrue(
"Predicate got fully expanded", t.getPredicate().getUnicodeString().startsWith("http"));
}
assertEquals("Graph size", 3, graph.size());
}