AbsoluteMapPath.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.mapmodel;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class AbsoluteMapPath implements Comparable<AbsoluteMapPath>, MapPath {

    private static final long serialVersionUID = 1L;

    @NotNull
    private final String path;

    public AbsoluteMapPath() {
        path = "";
    }

    public AbsoluteMapPath(@NotNull final AbsoluteMapPath parent, @NotNull final String name) {
        if (name.isEmpty()) {
            throw new IllegalArgumentException("map file is empty");
        }
        if (name.contains("/")) {
            throw new IllegalArgumentException("map file contains '/': " + name);
        }
        if (name.equals(".")) {
            path = parent.path;
        } else if (name.equals("..")) {
            if (parent.path.isEmpty()) {
                path = "";
            } else if (parent.path.endsWith("/..") || parent.path.equals("..")) {
                path = parent.path + "/..";
            } else {
                final int index = parent.path.lastIndexOf('/');
                if (index == -1) {
                    path = "";
                } else {
                    path = parent.path.substring(0, index);
                }
            }
        } else {
            if (parent.path.isEmpty()) {
                path = name;
            } else {
                path = parent.path + "/" + name;
            }
        }
    }

    @NotNull
    @Override
    public String getPath() {
        return path;
    }

    @NotNull
    public RelativeMapPath getRelativeMapPathTo(@NotNull final MapPath mapPath) {
        if (mapPath instanceof RelativeMapPath) {
            return (RelativeMapPath) mapPath;
        }
        if (mapPath instanceof AbsoluteMapPath) {
            return new RelativeMapPath(this, (AbsoluteMapPath) mapPath);
        }
        throw new AssertionError();
    }

    @Nullable
    @Override
    public String getMapComponent() {
        final int index = path.indexOf('/', 1);
        if (index == -1) {
            return null;
        }

        return path.substring(0, index);
    }

    @Override
    public int compareTo(@NotNull final AbsoluteMapPath o) {
        return path.compareTo(o.path);
    }

    @Override
    public boolean equals(@Nullable final Object obj) {
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        final AbsoluteMapPath mapPath = (AbsoluteMapPath) obj;
        return path.equals(mapPath.path);
    }

    @Override
    public int hashCode() {
        return path.hashCode();
    }

    @Override
    public String toString() {
        return "/" + path;
    }

}