public NameSample read()

in opennlp-tools/src/main/java/opennlp/tools/formats/Conll02NameSampleStream.java [126:223]
71 lines of code
24 McCabe index (conditional complexity)

  public NameSample read() throws IOException {

    List<String> sentence = new ArrayList<>();
    List<String> tags = new ArrayList<>();

    boolean isClearAdaptiveData = false;

    // Empty line indicates end of sentence

    String line;
    while ((line = lineStream.read()) != null && !StringUtil.isEmpty(line)) {

      if (LANGUAGE.NLD.equals(lang) && line.startsWith(DOCSTART)) {
        isClearAdaptiveData = true;
        continue;
      }

      String[] fields = line.split(" ");

      if (fields.length == 3) {
        sentence.add(fields[0]);
        tags.add(fields[2]);
      }
      else {
        throw new IOException("Expected three fields per line in training data, got " +
            fields.length + " for line '" + line + "'!");
      }
    }

    // Always clear adaptive data for spanish
    if (LANGUAGE.SPA.equals(lang))
      isClearAdaptiveData = true;

    if (sentence.size() > 0) {

      // convert name tags into spans
      List<Span> names = new ArrayList<>();

      int beginIndex = -1;
      int endIndex = -1;
      for (int i = 0; i < tags.size(); i++) {

        String tag = tags.get(i);

        if (tag.endsWith("PER") && (types & GENERATE_PERSON_ENTITIES) == 0)
          tag = "O";

        if (tag.endsWith("ORG") && (types & GENERATE_ORGANIZATION_ENTITIES) == 0)
          tag = "O";

        if (tag.endsWith("LOC") && (types & GENERATE_LOCATION_ENTITIES) == 0)
          tag = "O";

        if (tag.endsWith("MISC") && (types & GENERATE_MISC_ENTITIES) == 0)
          tag = "O";

        if (tag.startsWith("B-")) {

          if (beginIndex != -1) {
            names.add(extract(beginIndex, endIndex, tags.get(beginIndex)));
            beginIndex = -1;
            endIndex = -1;
          }

          beginIndex = i;
          endIndex = i + 1;
        }
        else if (tag.startsWith("I-")) {
          endIndex++;
        }
        else if (tag.equals("O")) {
          if (beginIndex != -1) {
            names.add(extract(beginIndex, endIndex, tags.get(beginIndex)));
            beginIndex = -1;
            endIndex = -1;
          }
        }
        else {
          throw new IOException("Invalid tag: " + tag);
        }
      }

      // if one span remains, create it here
      if (beginIndex != -1)
        names.add(extract(beginIndex, endIndex, tags.get(beginIndex)));

      return new NameSample(sentence.toArray(new String[0]),
          names.toArray(new Span[0]), isClearAdaptiveData);
    }
    else if (line != null) {
      // Just filter out empty events, if two lines in a row are empty
      return read();
    }
    else {
      // source stream is not returning anymore lines
      return null;
    }
  }