Examples of org.openrdf.rio.RDFFormat

org.openrdf.rio.RDFFormat
Represents the concept of an RDF data serialization format. RDF formats are identified by a {@link #getName() name} and can have one or more associatedMIME types, zero or more associated file extensions and can specify a (default) character encoding. Some formats are able to encode context information while other are not; this is indicated by the value of {@link #supportsContexts}. @author Arjohn Kampman

      
      Repository repository = new SailRepository(
          new ForwardChainingRDFSInferencer(new MemoryStore()));
      repository.initialize();
      RepositoryConnection con = repository.getConnection();
      RDFFormat rdfFromat;
      if(format.equals("auto-detect")){
        rdfFromat = guessFormat(filename);
      }else if(format.equals("TTL")){
        rdfFromat = RDFFormat.TURTLE;
      }else if(format.equals("N3")){

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    String mimeType = urlCon.getContentType();
    int semiColonIdx = mimeType.indexOf(';');
    if (semiColonIdx >= 0) {
      mimeType = mimeType.substring(0, semiColonIdx);
    }
    RDFFormat format = RDFParserRegistry.getInstance().getFileFormatForMIMEType(mimeType);


    // Fall back to using file name extensions
    if (format == null) {
      format = RDFParserRegistry.getInstance().getFileFormatForFileName(url.getFile());
    }

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    URL modelURL = this.getClass().getResource(TESTCASES_DIR + fileName);
    assertNotNull("Test file not found: " + fileName, modelURL);


    Set<Statement> model = new LinkedHashSet<Statement>();


    RDFFormat rdfFormat = Rio.getParserFormatForFileName(fileName);
    assertNotNull("Unable to determine RDF format for file: " + fileName, rdfFormat);


    RDFParser parser = Rio.createParser(rdfFormat);
    parser.setDatatypeHandling(DatatypeHandling.IGNORE);
    parser.setPreserveBNodeIDs(true);

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    Map<String, Object> result = (Map<String, Object>)super.referenceData(request);


    Map<String, String> resultFormats = new TreeMap<String, String>();


    for (RDFWriterFactory factory : RDFWriterRegistry.getInstance().getAll()) {
      RDFFormat resultFormat = factory.getRDFFormat();
      resultFormats.put(resultFormat.getName(), resultFormat.getName());
    }


    result.put("resultFormats", resultFormats);


    return result;

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      BindException errors)
  {
    HTTPRepository repo = (HTTPRepository)request.getSession().getAttribute(SessionKeys.REPOSITORY_KEY);


    ExtractionSettings settings = (ExtractionSettings)command;
    RDFFormat format = settings.getResultFormat();


    RepositoryConnection conn = null;
    try {
      response.setContentType(format.getDefaultMIMEType());
      String filename = "extract";
      if (format.getDefaultFileExtension() != null) {
        filename += "." + format.getDefaultFileExtension();
      }
      response.setHeader("Content-Disposition", "attachment; filename=" + filename);


      RDFWriter writer = Rio.createWriter(format, response.getOutputStream());

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    Map<String, Object> result = new HashMap<String, Object>();


    Map<String, String> resultFormats = new TreeMap<String, String>();


    for (RDFWriterFactory factory : RDFWriterRegistry.getInstance().getAll()) {
      RDFFormat resultFormat = factory.getRDFFormat();
      resultFormats.put(resultFormat.getName(), resultFormat.getName());
    }


    result.put("resultFormats", resultFormats);


    return result;

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        else {
          contextURI = repository.getValueFactory().createURI(context);
        }
      }


      RDFFormat format = Rio.getParserFormatForFileName(dataPath, RDFFormat.RDFXML);


      writeln("Loading data...");
      long startTime = System.currentTimeMillis();


      RepositoryConnection con = repository.getConnection();

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      dataPath = "file:" + dataPath;
    }


    try {
      URL dataURL = new URL(dataPath);
      RDFFormat format = Rio.getParserFormatForFileName(dataPath, RDFFormat.RDFXML);


      writeln("RDF Format is " + format.getName());


      RDFParser parser = Rio.createParser(format);
      VerificationListener listener = new VerificationListener();
      parser.setDatatypeHandling(RDFParser.DatatypeHandling.VERIFY);
      parser.setVerifyData(true);

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    int httpCode = httpClient.executeMethod(method);


    if (httpCode == HttpURLConnection.HTTP_OK) {
      String mimeType = getResponseMIMEType(method);
      try {
        RDFFormat format = RDFFormat.matchMIMEType(mimeType, rdfFormats);
        RDFParser parser = Rio.createParser(format, getValueFactory());
        parser.setPreserveBNodeIDs(true);
        parser.setRDFHandler(handler);
        parser.parse(method.getResponseBodyAsStream(), method.getURI().getURI());
      }

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    Resource[] contexts = (Resource[])model.get(CONTEXTS_KEY);
    boolean useInferencing = (Boolean)model.get(USE_INFERENCING_KEY);


    RDFWriterFactory rdfWriterFactory = (RDFWriterFactory)model.get(FACTORY_KEY);


    RDFFormat rdfFormat = rdfWriterFactory.getRDFFormat();


    try {
      OutputStream out = response.getOutputStream();
      RDFWriter rdfWriter = rdfWriterFactory.getWriter(out);


      response.setStatus(SC_OK);


      String mimeType = rdfFormat.getDefaultMIMEType();
      if (rdfFormat.hasCharset()) {
        Charset charset = rdfFormat.getCharset();
        mimeType += "; charset=" + charset.name();
      }
      response.setContentType(mimeType);


      String filename = "statements";
      if (rdfFormat.getDefaultFileExtension() != null) {
        filename += "." + rdfFormat.getDefaultFileExtension();
      }
      response.setHeader("Content-Disposition", "attachment; filename=" + filename);


      repositoryCon.exportStatements(subj, pred, obj, useInferencing, rdfWriter, contexts);

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