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JAXB (JSR 222) Reference Implementation
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/*
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package com.sun.xml.bind.v2.runtime.property;

import com.sun.xml.bind.v2.model.nav.Navigator;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Utils class.
 * Has *package private* access to avoid inappropriate usage.
 */
final class Utils {

    private static final Logger LOGGER = Logger.getLogger(Utils.class.getName());

    /**
     * static ReflectionNavigator field to avoid usage of reflection every time we use it.
     */
    static final Navigator REFLECTION_NAVIGATOR;

    static { // we statically initializing REFLECTION_NAVIGATOR property
        try {
            Class refNav = Class.forName("com.sun.xml.bind.v2.model.nav.ReflectionNavigator");
            //noinspection unchecked
            final Method getInstance = refNav.getDeclaredMethod("getInstance");

            // requires accessClassInPackage privilege
            AccessController.doPrivileged(
                    new PrivilegedAction