com.athomas.androidkickstartr.util.ResourcesUtils.java Source code

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Here is the source code for com.athomas.androidkickstartr.util.ResourcesUtils.java

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/**
 * Copyright (C) 2012-2013 eBusiness Information (www.ebusinessinformation.fr)
 *
 * 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 com.athomas.androidkickstartr.util;

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

import org.apache.commons.io.FileUtils;

/**
 * Useful utils for extracting resources from a jar
 * 
 * @author Alexandre THOMAS
 */
public class ResourcesUtils {

    public static void copyResourcesTo(File resourcesDir, String filepathMarker) throws IOException {

        if (resourcesDir == null) {
            throw new IllegalArgumentException("The resources dir must not be null");
        }

        ClassLoader classLoader = ResourcesUtils.class.getClassLoader();
        URL url = classLoader.getResource(filepathMarker);
        String protocol = url.getProtocol();

        if (protocol.equals("file")) {
            File src = new File("src/main/resources");
            FileUtils.copyDirectory(src, resourcesDir);
        } else if (protocol.equals("jar")) {
            copyResourcesToFromJar(resourcesDir, url);
        }
    }

    private static void copyResourcesToFromJar(File target, URL url) throws IOException {
        JarURLConnection connection = (JarURLConnection) url.openConnection();
        JarFile jarFile = connection.getJarFile();

        Enumeration<JarEntry> entries = jarFile.entries();

        while (entries.hasMoreElements()) {
            JarEntry jarEntry = entries.nextElement();
            InputStream is = jarFile.getInputStream(jarEntry);
            String entryPath = jarEntry.getName();

            File file = null;
            String dirs = "";
            if (entryPath.contains("/")) {
                int lastIndexOf = entryPath.lastIndexOf("/");
                dirs = (String) entryPath.subSequence(0, lastIndexOf + 1);
            }

            File parent = new File(target, dirs);
            parent.mkdirs();

            if (!jarEntry.isDirectory()) {
                String[] splitedPath = entryPath.split("/");
                String fileName = splitedPath[splitedPath.length - 1];
                file = new File(parent, fileName);
                FileUtils.copyInputStreamToFile(is, file);
            }
        }
    }
}