How to use

getAvailableAttackers

method

in

mage.players.Player

protected void checkAttackRequirements(Player player, Game game) {
  for (Permanent creature : player.getAvailableAttackers(game)) {
    boolean mustAttack = false;
    Set<UUID> defendersForcedToAttack = new HashSet<>();

public void selectAttackers(Game game) {
  if (!game.replaceEvent(GameEvent.getEvent(GameEvent.EventType.DECLARING_ATTACKERS, attackingPlayerId, attackingPlayerId))) {
    Player player = game.getPlayer(attackingPlayerId);
    //20101001 - 508.1d
    game.getCombat().checkAttackRequirements(player, game);
    boolean firstTime = true;
    do {
      if (!firstTime
          || !game.getPlayer(game.getActivePlayerId()).getAvailableAttackers(game).isEmpty()) {
        player.selectAttackers(game, attackingPlayerId);
      }
      firstTime = false;
      if (game.isPaused()
          || game.checkIfGameIsOver()
          || game.executingRollback()) {
        return;
      }
      // because of possible undo during declare attackers it's neccassary to call here the methods with "game.getCombat()." to get the current combat object!!!
      // I don't like it too - it has to be redesigned
    } while (!game.getCombat().checkAttackRestrictions(player, game));
    game.getCombat().resumeSelectAttackers(game);
  }
}

Player controller = game.getPlayer(source.getControllerId());
Player attackingPlayer = game.getPlayer(game.getCombat().getAttackingPlayerId());
if (controller != null && attackingPlayer != null && !attackingPlayer.getAvailableAttackers(game).isEmpty()) {
  Target target = new TargetCreaturePermanent(0, Integer.MAX_VALUE, filter, true);
  if (controller.chooseTarget(Outcome.Benefit, target, source, game)) {