Arakne / Araknemu

 * This file is part of Araknemu.

 *

 * Araknemu is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Araknemu is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with Araknemu.  If not, see <https://www.gnu.org/licenses/>.

 *

 * Copyright (c) 2017-2020 Vincent Quatrevieux

 */

package fr.quatrevieux.araknemu.game.monster.reward;

import fr.arakne.utils.value.Interval;

import fr.quatrevieux.araknemu.data.world.entity.monster.MonsterRewardItem;

import org.checkerframework.checker.index.qual.NonNegative;

import java.util.Collections;

import java.util.List;

/**

 * Null object for rewards

 */

public final class NullMonsterGradesReward implements MonsterGradesReward {

    public static final NullMonsterGradesReward INSTANCE = new NullMonsterGradesReward();

    private static final Interval NULL_INTERVAL = new Interval(0, 0);

    private static final MonsterReward NULL_REWARD = new MonsterReward() {

        @Override

        public Interval kamas() {

            return NULL_INTERVAL;

        }

        @Override

        public @NonNegative long experience() {

            return 0;

        }

        @Override

        public List<MonsterRewardItem> items() {

            return Collections.emptyList();

        }

    };

    @Override

    public @NonNegative long experience(int gradeNumber) {

        return 0;

    }

    @Override

    public List<MonsterRewardItem> items() {

        return Collections.emptyList();

    }

    @Override

    public MonsterReward grade(int gradeNumber) {

        return NULL_REWARD;

    }

}