com.ALC.SC2BOAserver.util.SC2BOAserverFileUtil.java Source code

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Here is the source code for com.ALC.SC2BOAserver.util.SC2BOAserverFileUtil.java

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/*
 * Copyright 2010-2012 Amazon.com, Inc. or its affiliates. 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.
 * A copy of the License is located at
 * 
 *  http://aws.amazon.com/apache2.0
 * 
 * or in the "license" file accompanying this file. This file 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 com.ALC.SC2BOAserver.util;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.compress.archivers.ArchiveException;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveStreamFactory;
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.utils.IOUtils;

/**
 * A simple utility class for handling files.  At the moment all it provides is the ability
 * to extract a zip file into a specified directory.
 */
public class SC2BOAserverFileUtil {

    /**
     * This method extracts data to a given directory.
     * 
     * @param directory the directory to extract into
     * @param zipIn input stream pointing to the zip file
     * @throws ArchiveException
     * @throws IOException
     * @throws FileNotFoundException
     */

    public static void extractZipToDirectory(File directory, InputStream zipIn)
            throws ArchiveException, IOException, FileNotFoundException {

        ArchiveInputStream in = new ArchiveStreamFactory().createArchiveInputStream("zip", zipIn);
        while (true) {
            ZipArchiveEntry entry = (ZipArchiveEntry) in.getNextEntry();
            if (entry == null) {
                in.close();
                break;
            }
            //Skip empty files
            if (entry.getName().equals("")) {
                continue;
            }

            if (entry.isDirectory()) {
                File file = new File(directory, entry.getName());
                file.mkdirs();
            } else {
                File outFile = new File(directory, entry.getName());
                if (!outFile.getParentFile().exists()) {
                    outFile.getParentFile().mkdirs();
                }
                OutputStream out = new FileOutputStream(outFile);
                IOUtils.copy(in, out);
                out.flush();
                out.close();
            }
        }
    }
}