Java URL Connection createWebStartDirectory(String name, String jarUrl)

Description

create Web Start Directory

License

EUPL

Declaration

protected static String createWebStartDirectory(String name, String jarUrl) throws IOException 

Method Source Code

//package com.java2s;
/*/*from  ww  w. j ava2s .c o  m*/
 * Copyright 2004-2014 SmartBear Software
 *
 * Licensed under the EUPL, Version 1.1 or - as soon as they will be approved by the European Commission - subsequent
 * versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 *
 * http://ec.europa.eu/idabc/eupl
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence is
 * distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the Licence for the specific language governing permissions and limitations
 * under the Licence.
*/

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class Main {
    protected static String createWebStartDirectory(String name, String jarUrl) throws IOException {

        String deploymentUserTmp = System.getProperty("deployment.user.tmp");
        JarFile jar = getJar(jarUrl);
        String dir = createDirectory(deploymentUserTmp, name);
        extract(jar, dir);
        return dir;
    }

    private static JarFile getJar(String jarUrl) throws MalformedURLException, IOException {
        // String reportsJarUrl = System.getProperty("reports.jar.url");
        URL url = new URL("jar:" + jarUrl + "!/");
        JarURLConnection jarConnection = (JarURLConnection) url.openConnection();
        JarFile jar = jarConnection.getJarFile();
        return jar;
    }

    private static String createDirectory(String deploymentUserTmp, String folderName) {
        File folder = new File(deploymentUserTmp + File.separator + folderName);
        folder.mkdir();
        // System.out.println(folder.getAbsolutePath());
        return folder.getAbsolutePath();
    }

    private static void extract(JarFile jar, String dir) throws IOException, FileNotFoundException {
        makeDirectories(jar, dir);
        extractFiles(jar, dir);
    }

    @SuppressWarnings("unchecked")
    private static void makeDirectories(JarFile jar, String eviwareDir) {
        Enumeration entries = jar.entries();
        while (entries.hasMoreElements()) {
            JarEntry file = (JarEntry) entries.nextElement();
            File f = new File(eviwareDir + File.separator + file.getName());
            if (file.isDirectory()) { // if its a directory, create it
                f.mkdir();
                // System.out.println(f);
            }
        }
    }

    @SuppressWarnings("unchecked")
    private static void extractFiles(JarFile jar, String eviwareDir) throws IOException, FileNotFoundException {
        Enumeration entries = jar.entries();
        while (entries.hasMoreElements()) {
            JarEntry file = (JarEntry) entries.nextElement();
            File f = new File(eviwareDir + File.separator + file.getName());

            if (file.isDirectory()) { // if its a directory, skip it
                continue;
            }
            // System.out.println(f);
            InputStream is = jar.getInputStream(file);
            FileOutputStream fos = new FileOutputStream(f);

            while (is.available() > 0) {
                fos.write(is.read());
            }

            fos.close();
            is.close();
        }
    }
}

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