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) 2017-2019 Vincent Quatrevieux

 */

package fr.quatrevieux.araknemu.core.config;

import org.checkerframework.checker.nullness.qual.Nullable;

import java.util.Collections;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

/**

 * NullObject for Pool

 */

public final class EmptyPool implements Pool {

    @Override

    public boolean has(String key) {

        return false;

    }

    @Override

    public List<String> getAll(String key) {

        return Collections.emptyList();

    }

    @Override

    public Iterator<Map.Entry<String, String>> iterator() {

        return Collections.emptyIterator();

    }

}