Package org.chaidb.db.helper

Source Code of org.chaidb.db.helper.ZipUtil

/*
* Copyright (C) 2006  http://www.chaidb.org
*
* 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.
*
*/

package org.chaidb.db.helper;

import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

public class ZipUtil {
    public static void zip(String zipFileName, String inputFile) throws IOException {
        zip(zipFileName, new File(inputFile));
    }

    public static void zip(String zipFileName, File inputFile) throws IOException {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
        zip(out, inputFile, "");
        out.close();
    }

    public static void zip(String inputFile, OutputStream output) throws IOException {
        ZipOutputStream out = new ZipOutputStream(output);
        zip(out, new File(inputFile), "");
        out.close();
    }

    /**
     * Unzip a zip file to a direcotry
     *
     * @param zipFileName     zip file name, like c:\test.zip
     * @param outputDirectory output dir
     * @throws IOException
     */
    public static void unzip(String zipFileName, String outputDirectory) throws IOException {
        unzip(new FileInputStream(zipFileName), outputDirectory);
    }

    public static void unzip(InputStream input, String outputDirectory) throws IOException {
        File outDir = new File(outputDirectory);
        if (!outDir.exists()) {
            outDir.mkdirs();
        }

        ZipInputStream in = new ZipInputStream(input);
        ZipEntry z;
        while ((z = in.getNextEntry()) != null) {
            if (z.isDirectory()) {
                String name = z.getName();
                name = name.substring(0, name.length() - 1);
                File f = new File(outputDirectory + File.separator + name);
                f.mkdirs();
                f.setLastModified(z.getTime());
            } else {
                File f = new File(outputDirectory + File.separator + z.getName());
                f.createNewFile();
                DataOutputStream out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(f)));
                int b;
                while ((b = in.read()) != -1) out.write(b);
                out.close();
                f.setLastModified(z.getTime());
            }
        }
        in.close();
    }

    /**
     * Add file to a opened zip file
     *
     * @param out  a ZipOutputStream, you should open it before call this method
     *             and close if after.
     * @param f    A file or dir need to add to the zip
     * @param base relative path, like "", "1/", "1/binaries/"
     * @throws IOException
     */
    public static void zip(ZipOutputStream out, File f, String base) throws IOException {
        if (f.isDirectory()) {
            File[] fl = f.listFiles();
            if (!base.equals("")) {
                ZipEntry entry = new ZipEntry(base + "/");
                entry.setTime(f.lastModified());
                out.putNextEntry(entry);
            }
            base = base.length() == 0 ? "" : base + "/";
            for (int i = 0; i < fl.length; i++) {
                zip(out, fl[i], base + fl[i].getName());
            }
        } else {
            ZipEntry entry = new ZipEntry(base);
            entry.setTime(f.lastModified());
            out.putNextEntry(entry);
            DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));
            int b;
            while ((b = in.read()) != -1) out.write(b);
            in.close();
        }
    }

    public static void addEntry(ZipOutputStream out, long time, String entryName) throws IOException {
        if (!entryName.equals("")) {
            ZipEntry entry = new ZipEntry(entryName);
            entry.setTime(time);
            out.putNextEntry(entry);
        }
    }
}
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