Null Pointer Exception while reading inbox

Question

Hi Experts
I am getting the Null Pointer Exception when I execute the following code. Can anybody please suggest where i am going wrong.
  public void readInbox( )
    //@@begin readInbox()
     while (! wdContext.nodeEmail().isEmpty()) {
          wdContext.nodeEmail().removeElement(wdContext.nodeEmail().getElementAt(0) );
     wdContext.nodeEmail().invalidate();   
     Message[] message = new Message[1000];
     IPublicEmailInteractiveFormComp.IEmailElement newEmailNodeElement;
     //Set properties
     // @TODO Enter your email server address here by replacing the text in angle brackets.
     String host = "otemail.otegroup.com";
     // @TODO Enter your email account here by replacing the text in angle brackets.
     String username = "[email protected]";
     // @TODO Enter your email account password here by replacing the text in angle brackets.
     String password = "password";
     Properties props = new Properties();     
     props.put("mail.smtp.host", host);
     //Set Session
     Session session = Session.getInstance(props, null);
     //Set the store
     try {
          Store store = session.getStore("imap");
          store.connect(host,username,password);
          //Get folder
          Folder folder = store.getFolder("INBOX");
          folder.open(Folder.READ_ONLY);
          //Get Mails
          message = folder.getMessages();
          //Fill table with mails
          for (int i = 0; i < message.length; i++)
               if (message<i>.isSet(Flags.Flag.SEEN) == false)
                    if (message<i>.getSubject().equals("Travel Request Form"))
                         newEmailNodeElement = wdContext.createEmailElement();                 
                         newEmailNodeElement.setFrom(message<i>.getFrom()[0].toString());
                         newEmailNodeElement.setSubject(message<i>.getSubject());
                         newEmailNodeElement.setSentDate(message<i>.getSentDate().toString());
                         //Check for right Attachment
                         Object content = message<i>.getContent();
                         if ( content != null  && content instanceof Multipart)
                              for (int j = 0 , n = ((Multipart)content).getCount(); j < n; j++)
                                   Part part = ((Multipart)content).getBodyPart(j);
                                   String disposition = part.getDisposition();
                                   if ( disposition != null && (disposition.equals(Part.ATTACHMENT) || disposition.equals(Part.INLINE)))
                                        if (part.getFileName().equals("TravelRequest.pdf"))
                                             newEmailNodeElement.setAttachment(true);
                                             newEmailNodeElement.setContentType(part.getContentType().toString());
                                             InputStream is = part.getInputStream();
                                             ByteArrayOutputStream bo = new ByteArrayOutputStream();                                                                                
                                             int c;
                                             while ((c = is.read()) > -1) bo.write(c);
                                             byte[] pdfSource = bo.toByteArray();
                                             newEmailNodeElement.setPdfSource(pdfSource);
                                             break;     
                                        else
                                             newEmailNodeElement.setAttachment(false);     
                         wdContext.nodeEmail().addElement(newEmailNodeElement);
          //Close connection
          folder.close(true);
          store.close();          
     catch (MessagingException e)
          wdComponentAPI.getMessageManager().reportSuccess(e.getMessage());
          e.printStackTrace();
     catch (IOException e)
          wdComponentAPI.getMessageManager().reportSuccess(e.getMessage());
          e.printStackTrace();
     catch (NullPointerException e)
          wdComponentAPI.getMessageManager().reportSuccess(e.getMessage());
          e.printStackTrace();
    //@@end
Regards
Abdullah

Answer 1

The error was caused when the subject used to return null