private static Class<?>[] getParameterTypes(String[] parameterTypes) throws ClassNotFoundException {
		if ((parameterTypes == null) || (parameterTypes.length == 0)) {
			return null;
		}

		Class<?>[] paramTypes = new Class<?>[parameterTypes.length];
		for(int i = 0; i < paramTypes.length; i++) {
			paramTypes[i] = Class.forName(parameterTypes[i]);
		}
		return paramTypes;
	}