Review

class TermVectorsWriter {
  /** Create term vectors writer for the specified segment in specified
   *  directory.  A new TermVectorsWriter should be created for each
   *  segment. The parameter <code>maxFields</code> indicates how many total
   *  fields are found in this document. Not all of these fields may require
   *  termvectors to be stored, so the number of calls to
   *  <code>openField</code> is less or equal to this number.
   */
  public TermVectorsWriter(Directory directory, String segment,
                           FieldInfos fieldInfos)
    throws IOException {
    // Open files for TermVector storage
    tvx = directory.createFile(segment + TVX_EXTENSION);
    tvx.writeInt(FORMAT_VERSION);
    tvd = directory.createFile(segment + TVD_EXTENSION);
    tvd.writeInt(FORMAT_VERSION);
    tvf = directory.createFile(segment + TVF_EXTENSION);
    tvf.writeInt(FORMAT_VERSION);

    this.fieldInfos = fieldInfos;
    fields = new Vector(fieldInfos.size());
    terms = new Vector();
  }

}