BlindSpotGiant.java example

Explorer
mage-master
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package mage.cards.b;

import mage.MageInt;
import mage.abilities.Ability;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.effects.RestrictionEffect;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.Zone;
import mage.filter.common.FilterControlledPermanent;
import mage.filter.predicate.mageobject.SubtypePredicate;
import mage.filter.predicate.permanent.AnotherPredicate;
import mage.game.Game;
import mage.game.permanent.Permanent;

import java.util.UUID;

/**
 *
 * @author LevelX2
 */
public class BlindSpotGiant extends CardImpl {

    public BlindSpotGiant(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{2}{R}");
        this.subtype.add("Giant");
        this.subtype.add("Warrior");

        this.power = new MageInt(4);
        this.toughness = new MageInt(3);

        // Blind-Spot Giant can't attack or block unless you control another Giant.
        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new BlindSpotGiantEffect()));

    }

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

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

class BlindSpotGiantEffect extends RestrictionEffect {

    private static final FilterControlledPermanent filter = new FilterControlledPermanent("another Giant");
    static {
        filter.add(new SubtypePredicate("Giant"));
        filter.add(new AnotherPredicate());
    }

    public BlindSpotGiantEffect() {
        super(Duration.WhileOnBattlefield);
        staticText = "{this} can't attack or block unless you control another Giant";
    }

    public BlindSpotGiantEffect(final BlindSpotGiantEffect effect) {
        super(effect);
    }

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

    @Override
    public boolean canAttack(Game game) {
        return false;
    }

    @Override
    public boolean canBlock(Permanent attacker, Permanent blocker, Ability source, Game game) {
        return false;
    }

    @Override
    public boolean applies(Permanent permanent, Ability source, Game game) {
        if (permanent.getId().equals(source.getSourceId())) {
            if (game.getBattlefield().count(filter, source.getSourceId(), source.getControllerId(), game) > 0) {
                return false;
            }
            return true;
        }  // do not apply to other creatures.
        return false;
    }
}