net.sourceforge.floggy.maven.ZipUtils.java Source code

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Here is the source code for net.sourceforge.floggy.maven.ZipUtils.java

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/**
 * Copyright (c) 2006-2011 Floggy Open Source Group. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.sourceforge.floggy.maven;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import java.util.Collection;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

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

/**
 * DOCUMENT ME!
 *
 * @author <a href="mailto:thiago.moreira@floggy.org">Thiago Moreira</a>
 * @version $Revision$
  */
public class ZipUtils {
    /**
     * Creates a new ZipUtils object.
     */
    protected ZipUtils() {
    }

    /**
     * DOCUMENT ME!
    *
    * @param file DOCUMENT ME!
    * @param directory DOCUMENT ME!
    *
    * @throws IOException DOCUMENT ME!
    */
    public static void unzip(File file, File directory) throws IOException {
        ZipFile zipFile = new ZipFile(file);
        Enumeration entries = zipFile.entries();

        if (!directory.exists() && !directory.mkdirs()) {
            throw new IOException("Unable to create the " + directory + " directory!");
        }

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

            if (entry.isDirectory()) {
                temp = new File(directory, entry.getName());

                if (!temp.exists() && !temp.mkdirs()) {
                    throw new IOException("Unable to create the " + temp + " directory!");
                }
            } else {
                temp = new File(directory, entry.getName());
                IOUtils.copy(zipFile.getInputStream(entry), new FileOutputStream(temp));
            }
        }

        zipFile.close();
    }

    /**
     * DOCUMENT ME!
    *
    * @param directories DOCUMENT ME!
    * @param output DOCUMENT ME!
    *
    * @throws IOException DOCUMENT ME!
    */
    public static void zip(File[] directories, File output) throws IOException {
        FileInputStream in = null;
        ZipOutputStream out = null;
        ZipEntry entry = null;

        Collection allFiles = new LinkedList();

        for (int i = 0; i < directories.length; i++) {
            allFiles.addAll(FileUtils.listFiles(directories[i], null, true));
        }

        out = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(output)));

        for (Iterator iter = allFiles.iterator(); iter.hasNext();) {
            File temp = (File) iter.next();
            String name = getEntryName(directories, temp.getAbsolutePath());
            entry = new ZipEntry(name);
            out.putNextEntry(entry);

            if (!temp.isDirectory()) {
                in = new FileInputStream(temp);
                IOUtils.copy(in, out);
                in.close();
            }
        }

        out.close();
    }

    private static String getEntryName(File[] directories, String file) {
        for (int i = 0; i < directories.length; i++) {
            String temp = directories[i].getAbsolutePath();
            int index = file.indexOf(temp);

            if (index != -1) {
                return file.substring(temp.length() + 1);
            }
        }

        return null;
    }
}