DirectoryCacheFiles.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.io;

import java.io.File;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class DirectoryCacheFiles implements CacheFiles {

    @NotNull
    private final File directory;

    @Nullable
    private final String suffix;

    public DirectoryCacheFiles(@NotNull final File directory, @Nullable final String suffix) {
        this.directory = directory;
        this.suffix = suffix;
    }

    @NotNull
    @Override
    public File getCacheFile(@NotNull final File file, @Nullable final String prefix) {
        final StringBuilder sb = new StringBuilder();
        for (File tmp = file; tmp != null; tmp = tmp.getParentFile()) {
            final CharSequence name = tmp.getName();
            int pos = 0;
            for (int i = 0; i < name.length(); i++) {
                final char ch = name.charAt(i);
                if (('0' <= ch && ch <= '9') || ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') || ch == ' ' || ch == '.' || ch == '-' || ch == '_') {
                    sb.insert(pos++, ch);
                } else {
                    sb.insert(pos++, '%');
                    final String str = Integer.toHexString((int) ch);
                    sb.insert(pos, str);
                    pos += str.length();
                }
            }
            sb.insert(0, '!');
        }
        if (suffix != null) {
            sb.append(suffix);
        }
        final File dir = prefix == null ? directory : new File(directory, prefix);
        return new File(dir, sb.toString());
    }

}