org.fox.ttcomics/src/main/java/org/fox/ttcomics2/junrar/impl/FileVolumeManager.java


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/*
 * This file is part of seedbox <github.com/seedbox>.
 *
 * seedbox 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 3 of the License, or
 * (at your option) any later version.
 *
 * seedbox 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 seedbox.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.fox.ttcomics2.junrar.impl;

import org.fox.ttcomics2.junrar.Archive;
import org.fox.ttcomics2.junrar.Volume;
import org.fox.ttcomics2.junrar.VolumeManager;
import org.fox.ttcomics2.junrar.util.VolumeHelper;

import java.io.File;
import java.io.IOException;


public class FileVolumeManager implements VolumeManager {
    private final File firstVolume;

    public FileVolumeManager(File firstVolume) {
        this.firstVolume = firstVolume;
    }

    @Override
    public Volume nextArchive(Archive archive, Volume last)
            throws IOException {
        if (last == null)
            return new FileVolume(archive, firstVolume);

        FileVolume lastFileVolume = (FileVolume) last;
        boolean oldNumbering = !archive.getMainHeader().isNewNumbering()
                || archive.isOldFormat();
        String nextName = VolumeHelper.nextVolumeName(lastFileVolume.getFile()
                .getAbsolutePath(), oldNumbering);
        File nextVolume = new File(nextName);

        return new FileVolume(archive, nextVolume);
    }
}