org.webical.plugin.file.ZipFileExtractor.java Source code

Introduction

Here is the source code for org.webical.plugin.file.ZipFileExtractor.java

Source

/*
 *    Webical - http://www.webical.org
 *    Copyright (C) 2007 Func. Internet Integration
 *
 *    This file is part of Webical.
 *
 *    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 3 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, see <http://www.gnu.org/licenses/>.
 */

package org.webical.plugin.file;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Utility to extract a zip file
 * @author ivo
 *
 */
public class ZipFileExtractor {

    private static Log log = LogFactory.getLog(ZipFileExtractor.class);

    /**
     * Unpacks a zip file to the given destination directory
     * @param inputFile the zipfile to extract
     * @param destinationDir the destination directory
     * @throws IOException
     */
    public static void unpackZipFile(File inputFile, File destinationDir) throws IOException {
        Enumeration entries;
        ZipFile zipFile;

        try {
            zipFile = new ZipFile(inputFile);

            entries = zipFile.entries();

            while (entries.hasMoreElements()) {
                ZipEntry entry = (ZipEntry) entries.nextElement();

                if (entry.isDirectory()) {
                    if (log.isDebugEnabled()) {
                        log.debug("Extracting directory: " + destinationDir + File.separator + entry.getName());
                    }
                    (new File(destinationDir.getAbsolutePath() + File.separator + entry.getName())).mkdir();
                    continue;
                }
                if (log.isDebugEnabled()) {
                    log.debug("Extracting file: " + destinationDir + File.separator + entry.getName());
                }
                FileUtils.copyInputStream(zipFile.getInputStream(entry), new BufferedOutputStream(
                        new FileOutputStream(destinationDir + File.separator + entry.getName())), true);
            }

            zipFile.close();
        } catch (IOException ioe) {
            log.error("Error while extracting file: " + inputFile.getAbsolutePath(), ioe);
            throw ioe;
        }
    }

}