org.ktunaxa.referral.server.FileUtil.java Source code

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Here is the source code for org.ktunaxa.referral.server.FileUtil.java

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/*
 * Ktunaxa Referral Management System.
 *
 * Copyright (C) see version control system
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.ktunaxa.referral.server;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * File utility for unzipping, copying files.
 * 
 * @author Jan De Moerloose
 */
public final class FileUtil {

    private static final Logger LOG = LoggerFactory.getLogger(FileUtil.class);

    private static final int BUFFER = 2048;

    private FileUtil() {
    }

    public static String[] unzip(File zipFile, File targetDir) throws IOException {
        ZipInputStream zin = new ZipInputStream(new FileInputStream(zipFile));
        try {
            ZipEntry entry;
            ArrayList<String> names = new ArrayList<String>();
            while ((entry = zin.getNextEntry()) != null) {
                LOG.info("Extracting: " + entry);
                String name = entry.getName();
                names.add(name);
                int count;
                byte[] data = new byte[BUFFER];
                FileOutputStream fos = new FileOutputStream(new File(targetDir, name));
                BufferedOutputStream destination = new BufferedOutputStream(fos, BUFFER);
                try {
                    while ((count = zin.read(data, 0, BUFFER)) != -1) {
                        destination.write(data, 0, count);
                    }
                    destination.flush();
                } finally {
                    destination.close();
                }
            }
            return names.toArray(new String[names.size()]);
        } finally {
            zin.close();
        }
    }

    public static void copyURLToFile(URL url, File file) throws IOException {
        FileUtils.copyURLToFile(url, file);
    }
}