mkos@450: /*
mkos@567:  * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
mkos@450:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mkos@450:  *
mkos@450:  * This code is free software; you can redistribute it and/or modify it
mkos@450:  * under the terms of the GNU General Public License version 2 only, as
mkos@450:  * published by the Free Software Foundation.  Oracle designates this
mkos@450:  * particular file as subject to the "Classpath" exception as provided
mkos@450:  * by Oracle in the LICENSE file that accompanied this code.
mkos@450:  *
mkos@450:  * This code is distributed in the hope that it will be useful, but WITHOUT
mkos@450:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mkos@450:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mkos@450:  * version 2 for more details (a copy is included in the LICENSE file that
mkos@450:  * accompanied this code).
mkos@450:  *
mkos@450:  * You should have received a copy of the GNU General Public License version
mkos@450:  * 2 along with this work; if not, write to the Free Software Foundation,
mkos@450:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mkos@450:  *
mkos@450:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mkos@450:  * or visit www.oracle.com if you need additional information or have any
mkos@450:  * questions.
mkos@450:  */
mkos@450: 
mkos@450: package com.sun.xml.internal.bind.v2.runtime;
mkos@450: 
mkos@450: import com.sun.xml.internal.bind.v2.model.nav.Navigator;
mkos@450: 
mkos@450: import java.lang.reflect.Field;
mkos@450: import java.lang.reflect.InvocationTargetException;
mkos@450: import java.lang.reflect.Method;
mkos@450: import java.lang.reflect.Type;
mkos@567: import java.security.AccessController;
mkos@567: import java.security.PrivilegedAction;
mkos@450: import java.util.logging.Level;
mkos@450: import java.util.logging.Logger;
mkos@450: 
mkos@450: /**
mkos@450:  * Utils class.
mkos@721:  *
mkos@721:  * WARNING: If you are doing any changes don't forget to change other Utils classes in different packages.
mkos@721:  *
mkos@450:  * Has *package private* access to avoid inappropriate usage.
mkos@450:  */
mkos@567: final class Utils {
mkos@450: 
mkos@450:     private static final Logger LOGGER = Logger.getLogger(Utils.class.getName());
mkos@450: 
mkos@450:     /**
mkos@450:      * static ReflectionNavigator field to avoid usage of reflection every time we use it.
mkos@450:      */
mkos@567:     static final Navigator<Type, Class, Field, Method> REFLECTION_NAVIGATOR;
mkos@450: 
mkos@450:     static { // we statically initializing REFLECTION_NAVIGATOR property
mkos@450:         try {
mkos@721:             final Class refNav = Class.forName("com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator");
mkos@567: 
mkos@567:             // requires accessClassInPackage privilege
mkos@721:             final Method getInstance = AccessController.doPrivileged(
mkos@721:                     new PrivilegedAction<Method>() {
mkos@567:                         @Override
mkos@721:                         public Method run() {
mkos@721:                             try {
mkos@721:                                 Method getInstance = refNav.getDeclaredMethod("getInstance");
mkos@721:                                 getInstance.setAccessible(true);
mkos@721:                                 return getInstance;
mkos@721:                             } catch (NoSuchMethodException e) {
mkos@721:                                 throw new IllegalStateException("ReflectionNavigator.getInstance can't be found");
mkos@721:                             }
mkos@567:                         }
mkos@567:                     }
mkos@567:             );
mkos@567: 
mkos@450:             //noinspection unchecked
mkos@450:             REFLECTION_NAVIGATOR = (Navigator<Type, Class, Field, Method>) getInstance.invoke(null);
mkos@450:         } catch (ClassNotFoundException e) {
mkos@450:             throw new IllegalStateException("Can't find ReflectionNavigator class");
mkos@450:         } catch (InvocationTargetException e) {
mkos@450:             throw new IllegalStateException("ReflectionNavigator.getInstance throws the exception");
mkos@450:         } catch (IllegalAccessException e) {
mkos@450:             throw new IllegalStateException("ReflectionNavigator.getInstance method is inaccessible");
mkos@450:         } catch (SecurityException e) {
mkos@450:             LOGGER.log(Level.FINE, "Unable to access ReflectionNavigator.getInstance", e);
mkos@450:             throw e;
mkos@450:         }
mkos@450:     }
mkos@450: 
mkos@450:     /**
mkos@450:      * private constructor to avoid util class instantiating
mkos@450:      */
mkos@450:     private Utils() {
mkos@450:     }
mkos@450: }