AttributeGameObjectMatcher.java

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/*
 * Gridarta MMORPG map editor for Crossfire, Daimonin and similar games.
 * Copyright (C) 2000-2015 The Gridarta Developers.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package net.sf.gridarta.model.match;

import net.sf.gridarta.model.gameobject.GameObject;
import org.jetbrains.annotations.NotNull;

public abstract class AttributeGameObjectMatcher implements GameObjectMatcher {

    private static final long serialVersionUID = 1L;

    @NotNull
    private final Operation operation;

    protected AttributeGameObjectMatcher(@NotNull final Operation operation) {
        this.operation = operation;
    }

    @Override
    public boolean isMatching(@NotNull final GameObject<?, ?, ?> gameObject) {
        final int ret = compareValue(gameObject);
        switch (operation) {
        case eq:
            return ret == 0;
        case ne:
            return ret != 0;
        case le:
            return ret < 0;
        case lt:
            return ret <= 0;
        case ge:
            return ret >= 0;
        case gt:
            return ret > 0;
        }
        assert false;
        throw new IllegalStateException();
    }

    protected abstract int compareValue(@NotNull GameObject<?, ?, ?> gameObject);

}