DoubleLayerChecker.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.validation.checks;

import java.util.HashMap;
import java.util.Map;
import net.sf.gridarta.model.archetype.Archetype;
import net.sf.gridarta.model.gameobject.DefaultIsoGameObject;
import net.sf.gridarta.model.gameobject.GameObject;
import net.sf.gridarta.model.maparchobject.MapArchObject;
import net.sf.gridarta.model.mapmodel.MapSquare;
import net.sf.gridarta.model.validation.AbstractValidator;
import net.sf.gridarta.model.validation.ErrorCollector;
import net.sf.gridarta.model.validation.SquareValidator;
import net.sf.gridarta.model.validation.ValidatorPreferences;
import net.sf.gridarta.model.validation.errors.DoubleLayerError;
import org.jetbrains.annotations.NotNull;

public class DoubleLayerChecker<G extends GameObject<G, A, R>, A extends MapArchObject<A>, R extends Archetype<G, A, R>> extends AbstractValidator<G, A, R> implements SquareValidator<G, A, R> {

    public DoubleLayerChecker(@NotNull final ValidatorPreferences validatorPreferences) {
        super(validatorPreferences);
    }

    @Override
    public void validateSquare(@NotNull final MapSquare<G, A, R> mapSquare, @NotNull final ErrorCollector<G, A, R> errorCollector) {
        final Map<Integer, G> gameObjects = new HashMap<>();
        final Map<Integer, DoubleLayerError<G, A, R>> errors = new HashMap<>();
        for (final G gameObject : mapSquare) {
            final int layer = gameObject.getHead().getAttributeInt(DefaultIsoGameObject.LAYER, true);
            if (layer == 0) {
                // ignore layer 0
            } else {
                final DoubleLayerError<G, A, R> existingError = errors.get(layer);
                if (existingError != null) {
                    existingError.addGameObject(gameObject);
                } else {
                    final G existingGameObject = gameObjects.get(layer);
                    if (existingGameObject != null) {
                        final DoubleLayerError<G, A, R> error = new DoubleLayerError<>(mapSquare, existingGameObject);
                        errors.put(layer, error);
                        errorCollector.collect(error);
                    } else {
                        gameObjects.put(layer, gameObject);
                    }
                }
            }
        }
    }

}