public List<Result> search(String query) {
        System.out.println(" Proceeding query '" + query + "' start");
        MainGUI.setInfo(" Proceeding query '" + query + "' start");

        List<Result> results = new ArrayList<Result>();

        ExtendedQueryParser queryParser = new ExtendedQueryParser(this.postings);

        try {
            results = this.convertToList(queryParser.parseQuery(query));
        } catch (Exception e) {
            System.out.println("Error during parsing query. Error message " + e.getMessage());
            e.printStackTrace();
        }

        System.out.println(" Proceeding query '" + query + "' end");
        MainGUI.setInfo(" Proceeding query '" + query + "' end");

        String processQuery = queryParser.getLastQuery();
        this.rankDocuments(results, processQuery);

        return results;
    }