SoulSnare.java example

Explorer
mage-master
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package mage.cards.s;

import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.common.SimpleActivatedAbility;
import mage.abilities.costs.common.SacrificeSourceCost;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.effects.Effect;
import mage.abilities.effects.common.ExileTargetEffect;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.Zone;
import mage.filter.common.FilterAttackingCreature;
import mage.game.Game;
import mage.game.combat.CombatGroup;
import mage.game.permanent.Permanent;
import mage.target.common.TargetCreaturePermanent;

/**
 *
 * @author LoneFox

 */
public class SoulSnare extends CardImpl {

    public SoulSnare(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId,setInfo,new CardType[]{CardType.ENCHANTMENT},"{W}");

        // {W}, Sacrifice Soul Snare: Exile target creature that's attacking you or a planeswalker you control.
        Effect effect = new ExileTargetEffect();
        effect.setText("Exile target creature that's attacking you or a planeswalker you control.");
        Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, effect, new ManaCostsImpl("{W}"));
        ability.addCost(new SacrificeSourceCost());
        ability.addTarget(new TargetCreaturePermanent(new SoulSnareFilter()));
        this.addAbility(ability);
    }

    public SoulSnare(final SoulSnare card) {
        super(card);
    }

    @Override
    public SoulSnare copy() {
        return new SoulSnare(this);
    }
}

class SoulSnareFilter extends FilterAttackingCreature {

    public SoulSnareFilter() {
        super("creature that's attacking you or a planeswalker you control");
    }


    public SoulSnareFilter(final SoulSnareFilter filter) {
        super(filter);
    }

    @Override
    public SoulSnareFilter copy() {
        return new SoulSnareFilter(this);
    }

    @Override
    public boolean match(Permanent permanent, UUID sourceId, UUID playerId, Game game) {
        if(!super.match(permanent, sourceId, playerId, game)) {
            return false;
        }

        for(CombatGroup group : game.getCombat().getGroups()) {
            for(UUID attacker : group.getAttackers()) {
                if(attacker.equals(permanent.getId())) {
                    UUID defenderId = group.getDefenderId();
                    if(defenderId.equals(playerId)) {
                        return true;
                    }
                    else {
                        Permanent planeswalker = game.getPermanent(defenderId);
                        if(planeswalker != null && planeswalker.isPlaneswalker()
                            && planeswalker.getControllerId().equals(playerId)) {
                            return true;
                        }
                    }
                }
            }
        }

        return false;
    }
}