Recognize Map in JSP

[terrea]

I've got the next request processing I'm sending Map into jsp using the method. addTeamstoModelForSelecting(teamsForSelect, teams, model)♪

@RequestMapping(value = "/{seriesGameName}", method = RequestMethod.GET)
public String getTeamInfoGet(@PathVariable("seriesGameName") String seriesGameName, Model model) throws SQLException, ClassNotFoundException {
    Games games = seriesGamesRepository.getSeriesGames(seriesGameName);
    model.addAttribute("games", games);
    ...
        ArrayList<Team> teams = seriesGamesRepository.getTeamWhenHasNotInTeamsList(seriesGameName);
        addTeamstoModelForSelecting("teamsForSelect", teams, model);
        model.addAttribute("selectingTeam", new Team());
        return "pages/seriesGames/seriesGamesNotStart";
    ...
}

Method itself:

private void addTeamstoModelForSelecting(String tagName, ArrayList<Team> teams, Model model) {
    Map<String,String> teamsMap = new LinkedHashMap<String,String>();
    for(Team t : teams){
        teamsMap.put(""+t.getId(), t.getId()+": "+t.getName());
    }
    model.addAttribute(tagName, teamsMap);
}

I need to know the size of this Map in jsp.

I tried to do this:

<c:if test="${teamsForSelect.size > 0}">

but value ${teamsForSelect.size} Nothing's coming back.

How do I know the size of this Map?

[jules]

Connect.

<%@taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>

Dimension, respectively:

 <c:if test="${fn:length(teamsForSelect) > 0 }">