org.clickframes.util.ZipUtils.java Source code

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Here is the source code for org.clickframes.util.ZipUtils.java

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/*
 * Clickframes: Full lifecycle software development automation.
 * Copyright (C)  2009 Children's Hospital Boston
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package org.clickframes.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Collection;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;

public class ZipUtils {
    @SuppressWarnings("unchecked")
    /*
     * * zip the directory to the target file
     */
    public static void zipDir(File directory, File targetFile) throws IOException {
        targetFile.getParentFile().mkdirs();

        ZipOutputStream zipStream = new ZipOutputStream(new FileOutputStream(targetFile));

        for (File child : (Collection<File>) FileUtils.listFiles(directory, null, true)) {
            zipStream.putNextEntry(new ZipEntry(getRelativePath(child, directory)));
            IOUtils.copy(new FileInputStream(child), zipStream);
        }

        zipStream.finish();
    }

    private static String getRelativePath(File child, File directory) {
        String s1 = child.getAbsolutePath();
        String s2 = directory.getAbsolutePath() + File.separator;

        int j = 0;
        for (int i = 0; i < s2.length(); i++) {
            if (s2.charAt(i) == s1.charAt(j)) {
                j++;
            } else {
                break;
            }
        }

        return s1.substring(j, s1.length());
    }
}