| 1 | // Jomic - a viewer for comic book archives. |
| 2 | // Copyright (C) 2004-2011 Thomas Aglassinger |
| 3 | // |
| 4 | // This program is free software: you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation, either version 3 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | package net.sf.jomic.tools; |
| 17 | |
| 18 | import java.io.File; |
| 19 | |
| 20 | import org.apache.commons.logging.Log; |
| 21 | import org.apache.commons.logging.LogFactory; |
| 22 | |
| 23 | /** |
| 24 | * Task to extract contents of a RAR file to a target folder. |
| 25 | * |
| 26 | * @author Thomas Aglassinger |
| 27 | */ |
| 28 | public class ExtractRarTask extends AbstractTask |
| 29 | { |
| 30 | private static final double WEIGHT_LIST = 0.15; |
| 31 | private Log logger; |
| 32 | private FileArchive rarArchive; |
| 33 | |
| 34 | private File rarFile; |
| 35 | private File targetFolder; |
| 36 | |
| 37 | public ExtractRarTask(File newRarFile, File newTargetFolder) { |
| 38 | this(); |
| 39 | rarFile = newRarFile; |
| 40 | targetFolder = newTargetFolder; |
| 41 | setMaxProgress(rarFile.length() + 1); |
| 42 | } |
| 43 | |
| 44 | private ExtractRarTask() { |
| 45 | super(); |
| 46 | logger = LogFactory.getLog(ExtractRarTask.class); |
| 47 | } |
| 48 | |
| 49 | public void start() |
| 50 | throws Exception { |
| 51 | setProgress(0); |
| 52 | rarArchive = new FileArchive(rarFile); |
| 53 | |
| 54 | long progressAfterListRar = Math.round(WEIGHT_LIST * getMaxProgress()); |
| 55 | String[] fileNamesToExtract = rarArchive.list(); |
| 56 | boolean allFilesExtracted = false; |
| 57 | |
| 58 | setProgress(progressAfterListRar); |
| 59 | try { |
| 60 | rarArchive.extract(targetFolder, fileNamesToExtract, null, 0); |
| 61 | setProgress(getMaxProgress()); |
| 62 | allFilesExtracted = !isInterrupted(); |
| 63 | } finally { |
| 64 | if (!allFilesExtracted) { |
| 65 | if (logger.isInfoEnabled()) { |
| 66 | logger.info("removing files extracted so far"); |
| 67 | } |
| 68 | for (int fileNameToDeleteIndex = 0; fileNameToDeleteIndex < fileNamesToExtract.length; fileNameToDeleteIndex += 1) { |
| 69 | File fileToDelete = new File(targetFolder, fileNamesToExtract[fileNameToDeleteIndex]); |
| 70 | |
| 71 | fileToDelete.delete(); |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | } |
| 76 | } |