public Version determineWGAVersion() throws IOException, ClassNotFoundException, IllegalArgumentException, SecurityException, IllegalAccessException, NoSuchFieldException {
File classesDir = new File(getDeployDir(), "WEB-INF/classes");
URLClassLoader loader = new URLClassLoader(new URL[] {classesDir.toURL()}, this.getClass().getClassLoader());
Class wgaVersionClass = loader.loadClass("de.innovationgate.wgpublisher.WGAVersion");
Version version = new Version();
version.setMajorVersion(wgaVersionClass.getDeclaredField("WGAPUBLISHER_MAJOR_VERSION").getInt(null));
version.setMinorVersion(wgaVersionClass.getDeclaredField("WGAPUBLISHER_MINOR_VERSION").getInt(null));
version.setMaintenanceVersion(wgaVersionClass.getDeclaredField("WGAPUBLISHER_MAINTENANCE_VERSION").getInt(null));
version.setPatchVersion(wgaVersionClass.getDeclaredField("WGAPUBLISHER_PATCH_VERSION").getInt(null));