import org.apache.jena.riot.system.RiotLib; //导入依赖的package包/类
private void writeJsonLd(final OutputStream output, final DatasetGraph graph, final IRI... profiles) {
    final String profile = getCustomJsonLdProfile(profiles);
    final RDFFormat format = nonNull(profile) && nonNull(cache) ? JSONLD_COMPACT_FLAT : getJsonLdProfile(profiles);
    final WriterDatasetRIOT writer = RDFDataMgr.createDatasetWriter(format);
    final PrefixMap pm = RiotLib.prefixMap(graph);
    final String base = null;
    final JsonLDWriteContext ctx = new JsonLDWriteContext();
    if (nonNull(profile) && nonNull(cache)) {
        LOGGER.debug("Setting JSON-LD context with profile: {}", profile);
        final String c = cache.get(profile, p -> {
            try (final TypedInputStream res = HttpOp.execHttpGet(profile)) {
                return IOUtils.toString(res.getInputStream(), UTF_8);
            } catch (final IOException | HttpException ex) {
                LOGGER.warn("Error fetching profile {}: {}", p, ex.getMessage());
                return null;
            }
        });
        if (nonNull(c)) {
            ctx.setJsonLDContext(c);
            ctx.setJsonLDContextSubstitution("\"" + profile + "\"");
        }
    }
    writer.write(output, graph, pm, base, ctx);
}
 

import org.apache.jena.riot.system.RiotLib; //导入依赖的package包/类
public void writeTurtle(String baseIRI, PrefixMapping prefixes, boolean writeBase) {
	// Auto-register RDF prefix so that rdf:type is displayed well
	// All other prefixes come from the query and should be as author intended
	prefixes = ensureRDFPrefix(prefixes);

	if (writeBase) {
		// Jena's streaming Turtle writers don't output base even if it is provided,
		// so we write it directly.
		IndentedWriter w = new IndentedWriter(out);
		RiotLib.writeBase(w, baseIRI);
		w.flush();
	}
	
	StreamRDF writer = new WriterStreamRDFBlocks(out);
	if (dedupWindowSize > 0) {
		writer = new StreamRDFDedup(writer, dedupWindowSize);
	}
	writer.start();
	writer.base(baseIRI);
	for (Entry<String, String> e : prefixes.getNsPrefixMap().entrySet()) {
		writer.prefix(e.getKey(), e.getValue());
	}
	StreamOps.sendTriplesToStream(triples, writer);
	writer.finish();
}
 

import org.apache.jena.riot.system.RiotLib; //导入依赖的package包/类
private static Node tokenToNode(Token token) {
    if ( token.isIRI() )
        // URI or <_:...>
        return RiotLib.createIRIorBNode(token.getImage()) ;
    if ( token.isBNode() ) {
        // Blank node as _:...
        String label = token.getImage().substring(bNodeLabelStart.length());
        return NodeFactory.createBlankNode(label);
    }
    return token.asNode() ;
}
 

import org.apache.jena.riot.system.RiotLib; //导入依赖的package包/类
@Test
public void createEntity() throws Exception {
    Individual ent = provModel.createEntity(URI
            .create("http://example.com/fred#test"));
    provModel.createEntity(URI.create("http://example.com/test"));
    OntModel model = provModel.model;
    model.write(System.out, "TURTLE", "http://example.com/fred");
    model.write(System.out, "RDF/XML", "http://example.com/fred");

    WriterGraphRIOT writer = RDFDataMgr.createGraphWriter(RDFFormat.TURTLE_BLOCKS);
    writer.write(System.out, model.getBaseModel().getGraph(), RiotLib.prefixMap(model.getGraph()), "http://example.com/fred", new Context());

}
 

import org.apache.jena.riot.system.RiotLib; //导入依赖的package包/类
@Override
public void write(Writer out, Graph graph, PrefixMap prefixMap, String baseURI, Context context)
{
    // Writers are discouraged : just hope the charset is UTF-8.
    IndentedWriter x = RiotLib.create(out) ;
    SSE.write(x, graph) ;
}