podd.resources.services.util.ZipUtility.java Source code

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Here is the source code for podd.resources.services.util.ZipUtility.java

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/*
 * Copyright (c) 2009 - 2010. School of Information Technology and Electrical
 * Engineering, The University of Queensland.  This software is being developed
 * for the "Phenomics Ontoogy Driven Data Management Project (PODD)" project.
 * PODD is a National e-Research Architecture Taskforce (NeAT) project
 * co-funded by ANDS and ARCS.
 *
 * PODD 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.
 *
 * PODD 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 PODD.  If not, see <http://www.gnu.org/licenses/>.
 */

package podd.resources.services.util;

import org.apache.commons.io.IOUtils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

/**
 * @author Yuan-Fang Li
 * @version $Id$
 */
public class ZipUtility {
    public File zipDirectory(File zipFile, File directory) throws IOException {
        final String dirName = directory.getName();
        ZipOutputStream outStream = new ZipOutputStream(new FileOutputStream(zipFile));
        try {
            doZipDirectory(outStream, directory, dirName);
        } finally {
            outStream.close();
        }
        return zipFile;
    }

    private void doZipDirectory(ZipOutputStream zos, File directory, String path) throws IOException {
        for (File file : directory.listFiles()) {
            if (file.isDirectory()) {
                doZipDirectory(zos, file, path + File.separator + file.getName());
            } else {
                ZipEntry entry = new ZipEntry(path + File.separator + file.getName());
                zos.putNextEntry(entry);
                InputStream is = new FileInputStream(file);
                try {
                    IOUtils.copy(is, zos);
                } finally {
                    IOUtils.closeQuietly(is);
                }
            }
        }
    }

    public ZipOutputStream addZipEntry(ZipOutputStream zos, String name, InputStream is) throws IOException {
        ZipEntry entry = new ZipEntry(name);
        zos.putNextEntry(entry);
        try {
            IOUtils.copy(is, zos);
        } finally {
            IOUtils.closeQuietly(is);
        }
        return zos;
    }

    public File addZipEntry(File zipFile, String name, InputStream is) throws IOException {
        ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zipFile));
        addZipEntry(zos, name, is);
        zos.close();
        return zipFile;
    }

    public void unzipFile(File unzipDir, File zipFile) throws IOException {
        ZipFile zippedFile = new ZipFile(zipFile);
        try {
            final Enumeration<? extends ZipEntry> entries = zippedFile.entries();
            while (entries.hasMoreElements()) {
                final ZipEntry zipEntry = entries.nextElement();
                if (zipEntry.isDirectory()) {
                    File newDir = new File(zipEntry.getName());
                    //System.out.println("newDir = " + newDir.getPath());
                    newDir.mkdir();
                } else {
                    final InputStream is = zippedFile.getInputStream(zipEntry);
                    File curFile = new File(unzipDir, zipEntry.getName());
                    if (!curFile.getParentFile().exists()) {
                        curFile.getParentFile().mkdirs();
                    }
                    final FileOutputStream os = new FileOutputStream(curFile);
                    copyStream(is, os);
                }
            }
        } finally {
            zippedFile.close();
        }
    }

    private void copyStream(InputStream is, FileOutputStream fos) throws IOException {
        try {
            IOUtils.copy(is, fos);
        } finally {
            IOUtils.closeQuietly(is);
            IOUtils.closeQuietly(fos);
        }
    }
}