private LinkedHashMap<String, ArrayList<String>> parseCondition() {
        if (searchTextField.getText().trim().isEmpty()) {
            return null;
        }
        LinkedHashMap<String, ArrayList<String>> cond = new LinkedHashMap<>();

        String text = searchTextField.getText().trim();

        String[] queries = text.split(",");

        for (String query : queries) {
            if (query.contains(":")) {
                String[] components = query.split(":");
                if (components.length != 2) {
                    return null;
                }
                String key = components[0].trim();
                String value = components[1].trim();

                System.out.println(key + " " + value);

                if (!searchColumns.containsKey(key.toLowerCase()) || value.isEmpty()) {
                    return null;
                }
                String colName = searchColumns.get(key);
                if (!cond.containsKey(colName)) {
                    cond.put(colName, new ArrayList<>());
                }
                cond.get(colName).add(value);
            } else {
                if (query.trim().isEmpty()) {
                    return null;
                }

                if (!cond.containsKey(Book.BOOK_TITLE_COLNAME)) {
                    cond.put(Book.BOOK_TITLE_COLNAME, new ArrayList<>());
                }
                cond.get(Book.BOOK_TITLE_COLNAME).add(query.trim());
            }
        }

        return cond;
    }