Examples of org.apache.jena.riot.system.StreamRDF

org.apache.jena.riot.system.StreamRDF
The interface for the output of RDF, such as the RIOT parsers. The parser event model is that items are emitted for signficant events. The events are start/finish, emitting triples/quads/tuples as necessary, prefixes and base directives. Tuples are generalized triples or quads. A triple language will call triple(), quad language quad() in preference.

public class TriGWriterBlocks extends TriGWriterBase
{
    @Override
    protected void output(IndentedWriter iOut, DatasetGraph dsg, PrefixMap prefixMap, String baseURI)
    {
        StreamRDF dest = new WriterStreamRDFBlocks(iOut) ;
        WriterStream.write(dest, dsg, prefixMap, baseURI) ;
    }

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     * @param sink      Where to send the triples from the parser.
     * @see             RiotReader#parse
     */  
    public static void parseTriples(String filename, Lang lang, String baseIRI, Sink<Triple> sink)
    {
        StreamRDF dest = StreamRDFLib.sinkTriples(sink) ;
        parse(filename, lang, baseIRI, dest) ;
    }

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     * @param sink      Where to send the triples from the parser.
     * @see             RiotReader#parse
     */  
    public static void parseTriples(InputStream in, Lang lang, String baseIRI, Sink<Triple> sink)
    {
        StreamRDF dest = StreamRDFLib.sinkTriples(sink) ;
        parse(in, lang, baseIRI, dest) ;
    }

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     * @param sink      Where to send the quads from the parser.
     * @see             RiotReader#parse
     */
    public static void parseQuads(String filename, Lang lang, String baseIRI, Sink<Quad> sink)
    {
        StreamRDF dest = StreamRDFLib.sinkQuads(sink) ;
        parse(filename, lang, baseIRI, dest) ;
    }

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     * @param sink      Where to send the quads from the parser.
     * @see             RiotReader#parse
     */
    public static void parseQuads(InputStream in, Lang lang, String baseIRI, Sink<Quad> sink)
    {
        StreamRDF dest = StreamRDFLib.sinkQuads(sink) ;
        parse(in, lang, baseIRI, dest) ;
    }

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public class TurtleWriterBlocks extends TurtleWriterBase
{
    @Override
    protected void output(IndentedWriter out, Graph graph, PrefixMap prefixMap, String baseURI)
    {
        StreamRDF dest = new WriterStreamRDFBlocks(out) ;
        WriterStream.write(dest, graph, prefixMap, baseURI) ;
    }

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public class TurtleWriterFlat extends TurtleWriterBase
{
    @Override
    protected void output(IndentedWriter out, Graph graph, PrefixMap prefixMap, String baseURI)
    {
        StreamRDF dest = new WriterStreamRDFFlat(out) ;
        WriterStream.write(dest, graph, prefixMap, baseURI) ;
    }

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            Lang lang = RDFDataMgr.determineLang(source, s.getContentType(), null) ;
            
            if ( RDFLanguages.isTriples(lang) ) {
                // Triples
                Graph g = GraphFactory.createGraphMem() ;
                StreamRDF stream = StreamRDFLib.graph(g) ;
                RDFDataMgr.parse(stream, s, source) ;
                Graph g2 = graph(graphStore, dest) ;
                GraphUtil.addInto(g2, g) ;
            } else {
                // Quads
                if ( dest != null )
                    throw new UpdateException("Attempt to load quads into a graph") ;
                DatasetGraph dsg = DatasetGraphFactory.createMem() ;
                StreamRDF stream = StreamRDFLib.dataset(dsg) ;
                RDFDataMgr.parse(stream, s, source) ;
                Iterator<Quad>  iter = dsg.find() ; 
                for ( ; iter.hasNext() ; )
                {
                    Quad q = iter.next() ;

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        String filename = "data.ttl" ;


        // This is the heart of N-triples printing ... outoput is heavily buffered
        // so the FilterSinkRDF called flush at the end of parsing.
        Sink<Triple> output = new SinkTripleOutput(System.out, null, SyntaxLabels.createNodeToLabel()) ;
        StreamRDF filtered = new FilterSinkRDF(output, FOAF.name, FOAF.knows) ;
        
        // Call the parsing process. 
        RDFDataMgr.parse(filtered, filename) ;
    }

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     * @param sink      Where to send the triples from the parser.
     * @see             RiotReader#parse
     */  
    public static void parseTriples(String filename, Lang lang, String baseIRI, Sink<Triple> sink)
    {
        StreamRDF dest = StreamRDFLib.sinkTriples(sink) ;
        parse(filename, lang, baseIRI, dest) ;
    }

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