private static Connection getConnection()
    throws SQLException {
    return DriverManager.getConnection("jdbc:default:connection:");
   }
   
   public static CLOB blob2clob(BLOB blob)
   throws IOException, SQLException
   {
      CLOB my_clob = null;
      Connection con = null;
      Writer  writer = null;
      String vEncoding = "UTF-8";
      Reader reader = null;
      try
      { 
        con = getConnection();
        my_clob = CLOB.createTemporary(con, true, CLOB.DURATION_SESSION);
        reader = new InputStreamReader(blob.getBinaryStream(), vEncoding));
        writer = my_clob.getCharacterOutputStream()) ;
        char[] chars = new char[my_clob.getChunkSize()];
        int iChar;
        while ((iChar = reader.read(chars,0,my_clob.getChunkSize())) != -1) { // Вот здесь ошибка, так как в цикл оно уже не входит
          String t_str = new String(chars);
          SaveLog(0, iChar + " " + t_str,20);
          writer.write(chars, 0, iChar);
        }
        writer.flush();
        writer.close();
      } 
      finally {
        if (reader != null) {writer.close();}
        if (writer != null) {writer.close();}
        if (con != null) {con.close();}
      } 
      return my_clob;
  }