57 lines
1.7 KiB
Java
57 lines
1.7 KiB
Java
/*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package fr.neatmonster.nocheatplus.actions.types.penalty;
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/**
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* This penalty does nothing. It's presence solely indicates that an action is
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* to be canceled or rolled back.
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*
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* @author asofold
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*
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*/
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public final class CancelPenalty implements Penalty<CancelPenalty> {
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public static final CancelPenalty CANCEL = new CancelPenalty();
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private static boolean locked = false;
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public CancelPenalty() {
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super(); // Magic.
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synchronized(CancelPenalty.class) {
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if (CancelPenalty.locked) {
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throw new IllegalStateException("CancelPenalty.CANCEL is supposed to be the unique instance.");
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}
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else {
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CancelPenalty.locked = true;
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}
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}
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}
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@Override
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public Class<CancelPenalty> getRegisteredInput() {
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return CancelPenalty.class;
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}
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@Override
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public void addToPenaltyList(IPenaltyList penaltyList) {
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penaltyList.addPenalty(getRegisteredInput(), this);
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}
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@Override
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public boolean apply(CancelPenalty input) {
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return true; // Always remove.
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}
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}
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