if (!jarFile.exists())
throw new FileNotFoundException("Can't find jar file for plugin: "+
jarFile.getAbsolutePath());
JarClassLoader loader = new JarClassLoader(jarFile.getAbsolutePath());
pluginClass = loader.loadClass(infos.getJarClass());
} else {
pluginClass = getClass().getClassLoader().
loadClass(infos.getJarClass());