本文整理了Java中org.apache.jena.riot.RDFLanguages.isQuads方法的一些代码示例，展示了RDFLanguages.isQuads的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。RDFLanguages.isQuads方法的具体详情如下：
包路径：org.apache.jena.riot.RDFLanguages
类名称：RDFLanguages
方法名：isQuads

RDFLanguages.isQuads介绍

[英]return true if the language is registered as a quads language.
[中]如果语言注册为quads语言，则返回true。

代码示例

代码示例来源：origin: apache/jena

public void setDatasetContentType(String contentType) {
  // Check that this is a valid setting
  Lang lang = RDFLanguages.contentTypeToLang(contentType);
  if (lang == null)
    throw new IllegalArgumentException("Given Content Type '" + contentType + "' is not supported by RIOT");
  if (!RDFLanguages.isQuads(lang))
    throw new IllegalArgumentException("Given Content Type '" + contentType + "' is not a RDF Dataset format");
  datasetContentType = contentType;
}

代码示例来源：origin: apache/jena

@Override
protected RecordReader<LongWritable, QuadWritable> selectRecordReader(Lang lang) throws IOException {
  if (!RDFLanguages.isQuads(lang))
    throw new IOException(
        lang.getLabel()
            + " is not a RDF quads format, perhaps you wanted TriplesInputFormat or TriplesOrQuadsInputFormat instead?");
  // This will throw an appropriate error if the language does not support
  // triples
  return HadoopRdfIORegistry.createQuadReader(lang);
}

代码示例来源：origin: org.apache.jena/jena-elephas-io

@Override
protected RecordReader<LongWritable, QuadWritable> selectRecordReader(Lang lang) throws IOException {
  if (!RDFLanguages.isQuads(lang))
    throw new IOException(
        lang.getLabel()
            + " is not a RDF quads format, perhaps you wanted TriplesInputFormat or TriplesOrQuadsInputFormat instead?");
  // This will throw an appropriate error if the language does not support
  // triples
  return HadoopRdfIORegistry.createQuadReader(lang);
}

代码示例来源：origin: apache/jena

@Override
protected RecordWriter<TKey, QuadWritable> getRecordWriter(Writer writer, Configuration config, Path outputPath)
    throws IOException {
  Lang lang = RDFLanguages.filenameToLang(outputPath.getName());
  if (lang == null)
    throw new IOException("There is no registered RDF language for the output file " + outputPath.toString());
  if (!RDFLanguages.isQuads(lang))
    throw new IOException(
        lang.getName()
            + " is not a RDF quads format, perhaps you wanted TriplesOutputFormat or TriplesOrQuadsOutputFormat instead?");
  // This will throw an appropriate error if the language does not support
  // writing quads
  return HadoopRdfIORegistry.<TKey> createQuadWriter(lang, writer, config);
}

代码示例来源：origin: org.apache.jena/jena-elephas-io

@Override
protected RecordWriter<TKey, QuadWritable> getRecordWriter(Writer writer, Configuration config, Path outputPath)
    throws IOException {
  Lang lang = RDFLanguages.filenameToLang(outputPath.getName());
  if (lang == null)
    throw new IOException("There is no registered RDF language for the output file " + outputPath.toString());
  if (!RDFLanguages.isQuads(lang))
    throw new IOException(
        lang.getName()
            + " is not a RDF quads format, perhaps you wanted TriplesOutputFormat or TriplesOrQuadsOutputFormat instead?");
  // This will throw an appropriate error if the language does not support
  // writing quads
  return HadoopRdfIORegistry.<TKey> createQuadWriter(lang, writer, config);
}

代码示例来源：origin: apache/jena

/** Set the output format for sending RDF Datasets to the remote server.
 * This is used for HTTP PUT and POST to a dataset. 
 * This must be a quads format.
 */
public RDFConnectionRemoteBuilder quadsFormat(RDFFormat fmtQuads) {
  if ( ! RDFLanguages.isQuads(fmtQuads.getLang()) )
    throw new RiotException("Not a language for RDF Datasets: "+fmtQuads);
  this.outputQuads = fmtQuads;
  return this;
}

代码示例来源：origin: org.apache.jena/jena-rdfconnection

/** Set the output format for sending RDF Datasets to the remote server.
 * This is used for HTTP PUT and POST to a dataset. 
 * This must be a quads format.
 */
public RDFConnectionRemoteBuilder quadsFormat(RDFFormat fmtQuads) {
  if ( ! RDFLanguages.isQuads(fmtQuads.getLang()) )
    throw new RiotException("Not a language for RDF Datasets: "+fmtQuads);
  this.outputQuads = fmtQuads;
  return this;
}

代码示例来源：origin: AtomGraph/Core

public boolean isQuadsMediaType(MediaType mediaType)
{
  MediaType formatType = new MediaType(mediaType.getType(), mediaType.getSubtype()); // discard charset param
  Lang lang = RDFLanguages.contentTypeToLang(formatType.toString());
  return lang != null && RDFLanguages.isQuads(lang);
}

代码示例来源：origin: apache/jena

/** Set the output format for sending RDF Datasets to the remote server.
 * This is used for HTTP PUT and POST to a dataset. 
 * This must be a quads format.
 */
public RDFConnectionRemoteBuilder quadsFormat(Lang langQuads) {
  Objects.requireNonNull(langQuads);
  if ( ! RDFLanguages.isQuads(langQuads) )
    throw new RiotException("Not a language for RDF Datasets: "+langQuads);
  RDFFormat fmt = RDFWriterRegistry.defaultSerialization(langQuads);
  if ( fmt == null )
    throw new RiotException("Language name not recognized: "+langQuads);
  quadsFormat(fmt);
  return this;
}

代码示例来源：origin: org.apache.jena/jena-rdfconnection

/** Set the output format for sending RDF Datasets to the remote server.
 * This is used for HTTP PUT and POST to a dataset. 
 * This must be a quads format.
 */
public RDFConnectionRemoteBuilder quadsFormat(Lang langQuads) {
  Objects.requireNonNull(langQuads);
  if ( ! RDFLanguages.isQuads(langQuads) )
    throw new RiotException("Not a language for RDF Datasets: "+langQuads);
  RDFFormat fmt = RDFWriterRegistry.defaultSerialization(langQuads);
  if ( fmt == null )
    throw new RiotException("Language name not recognized: "+langQuads);
  quadsFormat(fmt);
  return this;
}

代码示例来源：origin: apache/jena

@Override
protected RecordWriter<TKey, QuadWritable> getRecordWriter(Writer writer, Configuration config, Path outputPath)
    throws IOException {
  Lang lang = RDFLanguages.filenameToLang(outputPath.getName());
  if (lang == null)
    throw new IOException("There is no registered RDF language for the output file " + outputPath.toString());
  if (!RDFLanguages.isQuads(lang) && !RDFLanguages.isTriples(lang))
    throw new IOException(lang.getName() + " is not a RDF triples/quads format");
  if (HadoopRdfIORegistry.hasQuadWriter(lang)) {
    // Supports quads directly
    return HadoopRdfIORegistry.<TKey> createQuadWriter(lang, writer, config);
  } else {
    // Try to create a triples writer and wrap downwards from quads
    // This will throw an error if a triple writer is not available
    return new QuadsToTriplesWriter<TKey>(HadoopRdfIORegistry.<TKey> createTripleWriter(lang, writer, config));
  }
}

代码示例来源：origin: apache/jena

@Override
protected RecordReader<LongWritable, QuadWritable> selectRecordReader(Lang lang) throws IOException {
  if (!RDFLanguages.isQuads(lang) && !RDFLanguages.isTriples(lang))
    throw new IOException(lang.getLabel() + " is not a RDF triples/quads format");
  if (HadoopRdfIORegistry.hasQuadReader(lang)) {
    // Supports quads directly
    return HadoopRdfIORegistry.createQuadReader(lang);
  } else {
    // Try to create a triples reader and wrap upwards into quads
    // This will throw an error if a triple reader is not available
    return new TriplesToQuadsReader(HadoopRdfIORegistry.createTripleReader(lang));
  }
}

代码示例来源：origin: org.apache.jena/jena-elephas-io

@Override
protected RecordReader<LongWritable, QuadWritable> selectRecordReader(Lang lang) throws IOException {
  if (!RDFLanguages.isQuads(lang) && !RDFLanguages.isTriples(lang))
    throw new IOException(lang.getLabel() + " is not a RDF triples/quads format");
  if (HadoopRdfIORegistry.hasQuadReader(lang)) {
    // Supports quads directly
    return HadoopRdfIORegistry.createQuadReader(lang);
  } else {
    // Try to create a triples reader and wrap upwards into quads
    // This will throw an error if a triple reader is not available
    return new TriplesToQuadsReader(HadoopRdfIORegistry.createTripleReader(lang));
  }
}

代码示例来源：origin: apache/jena

/** Get a StreamRDF destination that will output in syntax {@code RDFFormat}
 *  and is guaranteed to do so in a scaling, streaming fashion.    
 * @param output OutputStream
 * @param format  The syntax (as an {@link RDFFormat}) 
 * @return       StreamRDF, or null if format is not registered for streaming.
 * @see StreamOps#graphToStream
 * @see StreamOps#datasetToStream
 */
public static StreamRDF getWriterStream(OutputStream output, RDFFormat format) {
  StreamRDFWriterFactory x = registry.get(format) ;
  if ( x == null )
    throw new RiotException("Failed to find a writer factory for "+format) ;
  StreamRDF stream = x.create(output, format) ;
  if ( ! RDFLanguages.isQuads(format.getLang()) )
    // Only pass through triples.
    stream = new StreamTriplesOnly(stream) ;
  return stream ;
}

代码示例来源：origin: apache/jena

/** Send a file to named graph (or "default" or null for the default graph).
 * <p>
 * The Content-Type is inferred from the file extension.
 * <p>
 * "Replace" means overwrite existing data, othewise the date is added to the target.
 */
protected void upload(String graph, String file, boolean replace) {
  // if triples
  Lang lang = RDFLanguages.filenameToLang(file);
  if ( RDFLanguages.isQuads(lang) )
    throw new ARQException("Can't load quads into a graph");
  if ( ! RDFLanguages.isTriples(lang) )
    throw new ARQException("Not an RDF format: "+file+" (lang="+lang+")");
  String url = LibRDFConn.urlForGraph(svcGraphStore, graph);
  doPutPost(url, file, lang, replace);
}

代码示例来源：origin: org.apache.jena/jena-rdfconnection

/** Send a file to named graph (or "default" or null for the default graph).
 * <p>
 * The Content-Type is inferred from the file extension.
 * <p>
 * "Replace" means overwrite existing data, othewise the date is added to the target.
 */
protected void upload(String graph, String file, boolean replace) {
  // if triples
  Lang lang = RDFLanguages.filenameToLang(file);
  if ( RDFLanguages.isQuads(lang) )
    throw new ARQException("Can't load quads into a graph");
  if ( ! RDFLanguages.isTriples(lang) )
    throw new ARQException("Not an RDF format: "+file+" (lang="+lang+")");
  String url = LibRDFConn.urlForGraph(svcGraphStore, graph);
  doPutPost(url, file, lang, replace);
}

代码示例来源：origin: apache/jena

@Override
  protected void exec()
  {
    DatasetGraph dsg = super.getDatasetGraphTDB() ;
    
    // Prefer stream over fully pretty output formats.
    RDFFormat fmt = modLangOutput.getOutputStreamFormat() ;
    // Stream writing happens naturally - no need to call StreamRDFWriter.
    //if ( fmt != null && StreamRDFWriter.registered(fmt) )
    if ( fmt == null )
      fmt = modLangOutput.getOutputFormatted() ;
    if ( fmt == null )
      // Default.
      fmt = RDFFormat.NQUADS ;
    if ( ! RDFLanguages.isQuads(fmt.getLang() ))
      throw new CmdException("Databases can be dumped only in quad formats (e.g. Trig, N-Quads), not "+fmt.getLang()) ;
    RDFDataMgr.write(System.out, dsg, fmt) ;
  }
}

代码示例来源：origin: apache/jena

@Override
  protected void exec() {
    DatasetGraph dsg = getDatasetGraph() ;
    // Prefer stream over fully pretty output formats.
    RDFFormat fmt = modLangOutput.getOutputStreamFormat() ;
    // Stream writing happens naturally - no need to call StreamRDFWriter.
    //if ( fmt != null && StreamRDFWriter.registered(fmt) )
    if ( fmt == null )
      fmt = modLangOutput.getOutputFormatted() ;
    if ( fmt == null )
      // Default.
      fmt = RDFFormat.NQUADS ;
    if ( ! RDFLanguages.isQuads(fmt.getLang() ))
      throw new CmdException("Databases can be dumped only in quad formats (e.g. Trig, N-Quads), not "+fmt.getLang()) ;
    RDFFormat fmtFinal = fmt ;
    Txn.executeRead(dsg, ()->RDFDataMgr.write(System.out, dsg, fmtFinal));
  }
}

代码示例来源：origin: apache/jena

@Test public void jenaSystem_read_1() {
  assertTrue(RDFLanguages.isRegistered(lang)) ;
  if ( istriples ) 
    assertTrue(RDFLanguages.isTriples(lang)) ;
  else
    assertFalse(RDFLanguages.isTriples(lang)) ;
  if (isquads )
    assertTrue(RDFLanguages.isQuads(lang)) ;
  else
    assertFalse(RDFLanguages.isQuads(lang)) ;
}

代码示例来源：origin: com.github.jsonld-java/jsonld-java-jena

@Test
public void jenaSystem_read_1() {
  assertTrue(RDFLanguages.isRegistered(JenaJSONLD.JSONLD));
  assertTrue(RDFLanguages.isTriples(JenaJSONLD.JSONLD));
  assertTrue(RDFLanguages.isQuads(JenaJSONLD.JSONLD));
}