public static void __getNotes(String url, String token, Long[] ids)
     throws MoodleRestNotesException, MoodleRestException, UnsupportedEncodingException {
   if (MoodleCallRestWebService.isLegacy())
     throw new MoodleRestNotesException(MoodleRestException.NO_LEGACY);
   // MoodleWarning[] warnings=null;
   String functionCall = MoodleServices.CORE_NOTES_GET_NOTES.toString();
   StringBuilder data = new StringBuilder();
   data.append(URLEncoder.encode("wstoken", MoodleServices.ENCODING.toString()))
       .append("=")
       .append(URLEncoder.encode(token, MoodleServices.ENCODING.toString()));
   data.append("&")
       .append(URLEncoder.encode("wsfunction", MoodleServices.ENCODING.toString()))
       .append("=")
       .append(URLEncoder.encode(functionCall, MoodleServices.ENCODING.toString()));
   for (int i = 0; i < ids.length; i++) {
     if (ids[i] == null) throw new MoodleRestNotesException();
     else
       data.append("&")
           .append(URLEncoder.encode("notes[" + i + "]", MoodleServices.ENCODING.toString()))
           .append("=")
           .append(ids[i]);
   }
   data.trimToSize();
   NodeList elements = (new MoodleCallRestWebService()).__call(url, data.toString());
   // return warnings;
 }
 /**
  * Method to attach notes to users.
  *
  * @param notes MoodleNote[]
  * @return MoodleNote[]
  * @throws MoodleRestNotesException
  * @throws MoodleRestException
  */
 public static MoodleNote[] createNotes(MoodleNote[] notes)
     throws MoodleRestNotesException, MoodleRestException {
   int processedCount = 0;
   String functionCall =
       MoodleCallRestWebService.isLegacy()
           ? MoodleServices.MOODLE_NOTES_CREATE_NOTES.toString()
           : MoodleServices.CORE_NOTES_CREATE_NOTES.toString();
   try {
     StringBuilder data = new StringBuilder();
     if (MoodleCallRestWebService.getAuth() == null) throw new MoodleRestNotesException();
     else data.append(MoodleCallRestWebService.getAuth());
     data.append("&")
         .append(URLEncoder.encode("wsfunction", MoodleServices.ENCODING.toString()))
         .append("=")
         .append(URLEncoder.encode(functionCall, MoodleServices.ENCODING.toString()));
     for (int i = 0; i < notes.length; i++) {
       if (notes[i] == null)
         throw new MoodleRestNotesException(MoodleRestNotesException.NOTES_NULL);
       if (notes[i].getUserId() == null)
         throw new MoodleRestNotesException(MoodleRestNotesException.USERID_NOT_SET);
       else
         data.append("&")
             .append(
                 URLEncoder.encode("notes[" + i + "][userid]", MoodleServices.ENCODING.toString()))
             .append("=")
             .append(
                 URLEncoder.encode("" + notes[i].getUserId(), MoodleServices.ENCODING.toString()));
       if (notes[i].getPublishState() == null)
         throw new MoodleRestNotesException(MoodleRestNotesException.PUBLISHSTATE_NULL);
       else
         data.append("&")
             .append(
                 URLEncoder.encode(
                     "notes[" + i + "][publishstate]", MoodleServices.ENCODING.toString()))
             .append("=")
             .append(
                 URLEncoder.encode(
                     notes[i].getPublishState(), MoodleServices.ENCODING.toString()));
       if (notes[i].getCourseId() == null)
         throw new MoodleRestNotesException(MoodleRestNotesException.COURSEID_NOT_SET);
       else
         data.append("&")
             .append(
                 URLEncoder.encode(
                     "notes[" + i + "][courseid]", MoodleServices.ENCODING.toString()))
             .append("=")
             .append(
                 URLEncoder.encode(
                     "" + notes[i].getCourseId(), MoodleServices.ENCODING.toString()));
       if (notes[i].getText() == null)
         throw new MoodleRestNotesException(MoodleRestNotesException.TEXT_NULL);
       else
         data.append("&")
             .append(
                 URLEncoder.encode("notes[" + i + "][text]", MoodleServices.ENCODING.toString()))
             .append("=")
             .append(URLEncoder.encode(notes[i].getText(), MoodleServices.ENCODING.toString()));
       if (notes[i].getFormat() == null) {
         notes[i].setFormat("text");
       }
       if (notes[i].getFormat().equals("text") || notes[i].getFormat().equals("html"))
         data.append("&")
             .append(
                 URLEncoder.encode("notes[" + i + "][format]", MoodleServices.ENCODING.toString()))
             .append("=")
             .append(URLEncoder.encode(notes[i].getFormat(), MoodleServices.ENCODING.toString()));
       else throw new MoodleRestNotesException(MoodleRestNotesException.FORMAT_INCORRECT);
       if (notes[i].getClientNoteId() != null)
         data.append("&")
             .append(
                 URLEncoder.encode(
                     "notes[" + i + "][clientnoteid]", MoodleServices.ENCODING.toString()))
             .append("=")
             .append(
                 URLEncoder.encode(
                     notes[i].getClientNoteId(), MoodleServices.ENCODING.toString()));
     }
     data.trimToSize();
     NodeList elements = MoodleCallRestWebService.call(data.toString());
     for (int j = 0; j < elements.getLength(); j += 3, processedCount++) {
       for (int k = 0; k < 3; k++) {
         String content = elements.item(j + k).getTextContent();
         String nodeName =
             elements
                 .item(j + k)
                 .getParentNode()
                 .getAttributes()
                 .getNamedItem("name")
                 .getNodeValue();
         notes[processedCount].setMoodleNoteField(nodeName, content);
       }
     }
   } catch (UnsupportedEncodingException ex) {
     Logger.getLogger(MoodleRestNotes.class.getName()).log(Level.SEVERE, null, ex);
   }
   return notes;
 }
 public static void updateNotes(MoodleNote[] notes, MoodleWarning[] warnings)
     throws MoodleRestNotesException, UnsupportedEncodingException, MoodleRestException {
   if (MoodleCallRestWebService.isLegacy())
     throw new MoodleRestNotesException(MoodleRestException.NO_LEGACY);
   String functionCall = MoodleServices.CORE_NOTES_UPDATE_NOTES.toString();
   StringBuilder data = new StringBuilder();
   if (MoodleCallRestWebService.getAuth() == null) throw new MoodleRestNotesException();
   else data.append(MoodleCallRestWebService.getAuth());
   data.append("&")
       .append(URLEncoder.encode("wsfunction", MoodleServices.ENCODING.toString()))
       .append("=")
       .append(URLEncoder.encode(functionCall, MoodleServices.ENCODING.toString()));
   for (int i = 0; i < notes.length; i++) {
     data.append("&")
         .append(URLEncoder.encode("notes[" + i + "][id]", MoodleServices.ENCODING.toString()))
         .append("=")
         .append("" + notes[i].getNoteId());
     data.append("&")
         .append(
             URLEncoder.encode(
                 "notes[" + i + "][publishstate]", MoodleServices.ENCODING.toString()))
         .append("=")
         .append(notes[i].getPublishState());
     data.append("&")
         .append(URLEncoder.encode("notes[" + i + "][text]", MoodleServices.ENCODING.toString()))
         .append("=")
         .append(notes[i].getText());
     data.append("&")
         .append(URLEncoder.encode("notes[" + i + "][format]", MoodleServices.ENCODING.toString()))
         .append("=")
         .append("" + notes[i].getDescriptionFormat().toInt());
   }
   data.trimToSize();
   NodeList elements = MoodleCallRestWebService.call(data.toString());
   ArrayList<MoodleWarning> warn = null;
   MoodleWarning warning = null;
   for (int j = 0; j < elements.getLength(); j++) {
     String parent =
         elements
             .item(j)
             .getParentNode()
             .getParentNode()
             .getParentNode()
             .getParentNode()
             .getAttributes()
             .getNamedItem("name")
             .getNodeValue();
     String content = elements.item(j).getTextContent();
     String nodeName =
         elements.item(j).getParentNode().getAttributes().getNamedItem("name").getNodeValue();
     if (parent.equals("warnings")) {
       if (nodeName.equals("item")) {
         if (warn == null) {
           warn = new ArrayList<MoodleWarning>();
         }
         warning = new MoodleWarning(content);
         warn.add(warning);
       } else {
         warning.setMoodleWarningField(nodeName, content);
       }
     }
   }
   if (warn != null) {
     if (warnings != null) {
       warnings = new MoodleWarning[warn.size()];
       warnings = warn.toArray(warnings);
     }
   }
 }
 /**
  * Returns the HTTP encoded string required for web service authentication.
  *
  * <p>Order of authentication methods: token then username/password, if token not initialised or
  * null if both methods not initialised.
  *
  * @return String containing HTTP encoded string or null.
  * @throws UnsupportedEncodingException
  */
 public static String getAuth() throws UnsupportedEncodingException {
   StringBuilder data = new StringBuilder();
   if (MoodleCallRestWebService.getToken() != null) {
     data.append(URLEncoder.encode("wstoken", "UTF-8"))
         .append("=")
         .append(URLEncoder.encode(MoodleCallRestWebService.getToken(), "UTF-8"));
   } else {
     if (MoodleCallRestWebService.getUsername() != null
         && MoodleCallRestWebService.getPassword() != null) {
       data.append(URLEncoder.encode("wsusername", "UTF-8"))
           .append("=")
           .append(URLEncoder.encode(MoodleCallRestWebService.getUsername(), "UTF-8"));
       data.append("&"); // Fix by César Martínez
       data.append(URLEncoder.encode("wspassword", "UTF-8"))
           .append("=")
           .append(URLEncoder.encode(MoodleCallRestWebService.getPassword(), "UTF-8"));
     } else return null;
   }
   return data.toString();
 }