org.eclipse.smila.utils.compression.CompressionHelper.java Source code

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Here is the source code for org.eclipse.smila.utils.compression.CompressionHelper.java

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/***********************************************************************************************************************
 * Copyright (c) 2008 empolis GmbH and brox IT Solutions GmbH. All rights reserved. This program and the accompanying
 * materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Ivan Churkin (brox IT Solutions GmbH) - initial creator
 **********************************************************************************************************************/
package org.eclipse.smila.utils.compression;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

import org.apache.commons.io.IOUtils;

/**
 * The Compression Helper.
 */
public final class CompressionHelper {

    /**
     * Does not instantiates a new IO helper.
     */
    private CompressionHelper() {
    }

    /**
     * /** Unzip.
     * 
     * @param dest
     *          the dest
     * @param inputStream
     *          the input stream
     * 
     * @throws IOException
     *           Signals that an I/O exception has occurred.
     */
    public static void unzip(final File dest, final InputStream inputStream) throws IOException {
        ZipInputStream zis = null;
        FileOutputStream fileOutputStream = null;
        BufferedOutputStream bufferedOutputStream = null;
        try {
            zis = new ZipInputStream(inputStream);
            ZipEntry entry;
            while ((entry = zis.getNextEntry()) != null) {
                if (entry.isDirectory()) {
                    new File(dest, entry.getName()).mkdir();
                    continue;
                }
                final File destFile = new File(dest, entry.getName());
                if (!destFile.getParentFile().exists()) {
                    destFile.getParentFile().mkdirs();
                }
                try {
                    fileOutputStream = new FileOutputStream(destFile);
                    bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
                    IOUtils.copy(zis, bufferedOutputStream);
                } finally {
                    IOUtils.closeQuietly(fileOutputStream);
                    IOUtils.closeQuietly(bufferedOutputStream);
                }
                destFile.setLastModified(entry.getTime());
            }
        } finally {
            IOUtils.closeQuietly(zis);
        }
    }

}