class ExtSourceSql extends ExtSource implements ExtSourceSimpleApi {

	@Override
	public List<Map<String,String>> getUsersSubjects() {
		String query = getAttributes().get(UsersManager.USERS_QUERY);

		if (query == null) {
			throw new InternalErrorException("usersQuery attribute is required");
		}

		return this.querySource(query, null, 0);
	}

	public  ExtSourceSql();

}