Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

  * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 package com.sun.xml.internal.bind.v2.runtime;

 import com.sun.xml.internal.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.

  *

  * WARNING: If you are doing any changes don't forget to change other Utils classes in different packages.

  *

  * 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<Type, Class, Field, Method> REFLECTION_NAVIGATOR;

     static { // we statically initializing REFLECTION_NAVIGATOR property

         try {

             final Class refNav = Class.forName("com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator");

             // requires accessClassInPackage privilege

             final Method getInstance = AccessController.doPrivileged(

                     new PrivilegedAction<Method>() {

                         @Override

                         public Method run() {

                             try {

                                 Method getInstance = refNav.getDeclaredMethod("getInstance");

                                 getInstance.setAccessible(true);

                                 return getInstance;

                             } catch (NoSuchMethodException e) {

                                 throw new IllegalStateException("ReflectionNavigator.getInstance can't be found");

                             }

                         }

                     }

             );

             //noinspection unchecked

             REFLECTION_NAVIGATOR = (Navigator<Type, Class, Field, Method>) getInstance.invoke(null);

         } catch (ClassNotFoundException e) {

             throw new IllegalStateException("Can't find ReflectionNavigator class");

         } catch (InvocationTargetException e) {

             throw new IllegalStateException("ReflectionNavigator.getInstance throws the exception");

         } catch (IllegalAccessException e) {

             throw new IllegalStateException("ReflectionNavigator.getInstance method is inaccessible");

         } catch (SecurityException e) {

             LOGGER.log(Level.FINE, "Unable to access ReflectionNavigator.getInstance", e);

             throw e;

         }

     }

     /**

      * private constructor to avoid util class instantiating

      */

     private Utils() {

     }

 }