Program: 84938
Project: 84938
Buggy source:
/** 
 * Returns the id of the following book if it does already exist. If not, a new dialog will be opend to let the user enter the following book. Title, authors, location, company and category are already filled in.
 * @param followedByString the title of the following book
 * @param cur_Book the currently book to be saved
 * @return the id of the following book, or -1 if none does exist and the userdoesn't want to enter a book with the entered title.
 * @throws SQLException if something goes wrong during database operation
 */
public int getFollowedByID(String followedByString,Book cur_Book) throws SQLException {
  BookQuest questFromSubTitle=new BookQuest();
  questFromSubTitle.addStringCondition(BookQuest.SUBTITLE,followedByString,SQLOperator.OR);
  ArrayList<Book> booksFromSubTitle=reader.getBooks(questFromSubTitle);
  BookQuest questFromTitle=new BookQuest();
  questFromTitle.addStringCondition(BookQuest.TITLE,followedByString,SQLOperator.OR);
  ArrayList<Book> booksFromTitle=reader.getBooks(questFromTitle);
  int statement=-1;
  if (followedByString.equals("String_Node_Str")) {
    return statement;
  }
  if (booksFromTitle.isEmpty() && booksFromSubTitle.isEmpty()) {
    int result=JOptionPane.showConfirmDialog(null,java.util.ResourceBundle.getBundle("String_Node_Str").getString("String_Node_Str") + followedByString + java.util.ResourceBundle.getBundle("String_Node_Str").getString("String_Node_Str"),java.util.ResourceBundle.getBundle("String_Node_Str").getString("String_Node_Str"),JOptionPane.YES_NO_OPTION);
    if (result == JOptionPane.YES_OPTION) {
      Book book=writer.createBook();
      book.setSubtitle(followedByString);
      book.setTitle(cur_Book.getTitle());
      book.setCategoryID(cur_Book.getCategoryID());
      book.setLocationID(cur_Book.getLocationID());
      book.setCompanyID(cur_Book.getCompanyID());
      writer.copyAuthors(cur_Book,book);
      BookInputDialog dialog=new BookInputDialog(java.util.ResourceBundle.getBundle("String_Node_Str").getString("String_Node_Str"),reader,writer,book);
      int res=dialog.showWithResult();
      int id=book.getID();
      if (cur_Book.getID() != id && res == BookInputDialog.CONFIRMED) {
        statement=id;
      }
    }
  }
 else   if (!booksFromTitle.isEmpty() && booksFromSubTitle.isEmpty()) {
    statement=booksFromTitle.get(0).getID();
  }
 else   if (booksFromTitle.isEmpty() && !booksFromSubTitle.isEmpty()) {
    statement=booksFromSubTitle.get(0).getID();
  }
 else {
  }
  return statement;
}

Fixed version (ground truth):
/** 
 * Returns the id of the following book if it does already exist. If not, a new dialog will be opend to let the user enter the following book. Title, authors, location, company and category are already filled in.
 * @param followedByString the title of the following book
 * @param cur_Book the currently book to be saved
 * @return the id of the following book, or -1 if none does exist and theuser doesn't want to enter a book with the entered title.
 * @throws SQLException if something goes wrong during database operation
 */
public int getFollowedByID(String followedByString,Book cur_Book) throws SQLException {
  BookQuest questFromSubTitle=new BookQuest();
  questFromSubTitle.addStringCondition(BookQuest.SUBTITLE,followedByString,SQLOperator.OR);
  ArrayList<Book> booksFromSubTitle=reader.getBooks(questFromSubTitle);
  BookQuest questFromTitle=new BookQuest();
  questFromTitle.addStringCondition(BookQuest.TITLE,followedByString,SQLOperator.OR);
  ArrayList<Book> booksFromTitle=reader.getBooks(questFromTitle);
  int statement=-1;
  if (followedByString.equals("String_Node_Str")) {
    return statement;
  }
  if (booksFromTitle.isEmpty() && booksFromSubTitle.isEmpty()) {
    int result=JOptionPane.showConfirmDialog(null,java.util.ResourceBundle.getBundle("String_Node_Str").getString("String_Node_Str") + followedByString + java.util.ResourceBundle.getBundle("String_Node_Str").getString("String_Node_Str"),java.util.ResourceBundle.getBundle("String_Node_Str").getString("String_Node_Str"),JOptionPane.YES_NO_OPTION);
    if (result == JOptionPane.YES_OPTION) {
      Book book=writer.createBook();
      book.setSubtitle(followedByString);
      book.setTitle(cur_Book.getTitle());
      book.setCategoryID(cur_Book.getCategoryID());
      book.setLocationID(cur_Book.getLocationID());
      book.setCompanyID(cur_Book.getCompanyID());
      writer.copyAuthors(cur_Book,book);
      BookInputDialog dialog=new BookInputDialog(java.util.ResourceBundle.getBundle("String_Node_Str").getString("String_Node_Str"),reader,writer,book);
      int res=dialog.showWithResult();
      int id=book.getID();
      if (cur_Book.getID() != id && res == BookInputDialog.CONFIRMED) {
        statement=id;
      }
    }
  }
 else   if (!booksFromTitle.isEmpty() && booksFromSubTitle.isEmpty()) {
    statement=booksFromTitle.get(0).getID();
  }
 else   if (booksFromTitle.isEmpty() && !booksFromSubTitle.isEmpty()) {
    statement=booksFromSubTitle.get(0).getID();
  }
 else {
  }
  return statement;
}