/**
*
* Copyright (c) 2009-2013 Freedomotic team
* http://freedomotic.com
*
* This file is part of Freedomotic
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Freedomotic; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*/
package it.freedomotic.marketplace;
import it.freedomotic.util.JarFilter;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.logging.Logger;
/**
* Allows programs to modify the classpath during runtime.
*/
public class ClassPathUpdater {
/**
* Used to find the method signature.
*/
private static final Class<?>[] PARAMETERS = new Class<?>[]{URL.class};
/**
* Class containing the private addURL method.
*/
private static final Class<? extends ClassLoader> CLASS_LOADER = URLClassLoader.class;
/**
* Adds a new path to the classloader. If the given string points to a file,
* then that file's parent file (i.e., directory) is used as the directory
* to add to the classpath. If the given string represents a directory, then
* the directory is directly added to the classpath.
*
* @param s The directory to add to the classpath (or a file, which will
* relegate to its directory).
*/
public static void add(String s)
throws IOException, NoSuchMethodException, IllegalAccessException, InvocationTargetException {
add(new File(s));
}
/**
* Adds a new path to the classloader. If the given file object is a file,
* then its parent file (i.e., directory) is used as the directory to add to
* the classpath. If the given string represents a directory, then the
* directory it represents is added.
*
* @param f The directory (or enclosing directory if a file) to add to the
* classpath.
*/
public static void add(File f)
throws IOException, NoSuchMethodException, IllegalAccessException, InvocationTargetException {
// f = f.isDirectory() ? f : f.getParentFile();
if (f.isDirectory()) {
File[] jarList = f.listFiles(new JarFilter());
//the list of files in the jar
for (File jar : jarList) {
if (jar.isFile()) {
add(jar.toURI().toURL());
}
}
} else {
add(f.toURI().toURL());
}
}
/**
* Adds a new path to the classloader. The class must point to a directory,
* not a file.
*
* @param url The path to include when searching the classpath.
*/
public static void add(URL url)
throws IOException, NoSuchMethodException, IllegalAccessException, InvocationTargetException {
Method method = CLASS_LOADER.getDeclaredMethod("addURL", PARAMETERS);
method.setAccessible(true);
method.invoke(getClassLoader(),
new Object[]{url});
}
private static URLClassLoader getClassLoader() {
return (URLClassLoader) ClassLoader.getSystemClassLoader();
}
private ClassPathUpdater() {
}
private static final Logger LOG = Logger.getLogger(ClassPathUpdater.class.getName());
}