aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.bind.v2.runtime;
aoqi@0: 
aoqi@0: import com.sun.xml.internal.bind.v2.model.nav.Navigator;
aoqi@0: 
aoqi@0: import java.lang.reflect.Field;
aoqi@0: import java.lang.reflect.InvocationTargetException;
aoqi@0: import java.lang.reflect.Method;
aoqi@0: import java.lang.reflect.Type;
aoqi@0: import java.security.AccessController;
aoqi@0: import java.security.PrivilegedAction;
aoqi@0: import java.util.logging.Level;
aoqi@0: import java.util.logging.Logger;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Utils class.
aoqi@0:  * Has *package private* access to avoid inappropriate usage.
aoqi@0:  */
aoqi@0: final class Utils {
aoqi@0: 
aoqi@0:     private static final Logger LOGGER = Logger.getLogger(Utils.class.getName());
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * static ReflectionNavigator field to avoid usage of reflection every time we use it.
aoqi@0:      */
aoqi@0:     static final Navigator<Type, Class, Field, Method> REFLECTION_NAVIGATOR;
aoqi@0: 
aoqi@0:     static { // we statically initializing REFLECTION_NAVIGATOR property
aoqi@0:         try {
aoqi@0:             Class refNav = Class.forName("com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator");
aoqi@0:             //noinspection unchecked
aoqi@0:             final Method getInstance = refNav.getDeclaredMethod("getInstance");
aoqi@0: 
aoqi@0:             // requires accessClassInPackage privilege
aoqi@0:             AccessController.doPrivileged(
aoqi@0:                     new PrivilegedAction<Object>() {
aoqi@0:                         @Override
aoqi@0:                         public Object run() {
aoqi@0:                             getInstance.setAccessible(true);
aoqi@0:                             return null;
aoqi@0:                         }
aoqi@0:                     }
aoqi@0:             );
aoqi@0: 
aoqi@0:             //noinspection unchecked
aoqi@0:             REFLECTION_NAVIGATOR = (Navigator<Type, Class, Field, Method>) getInstance.invoke(null);
aoqi@0:         } catch (ClassNotFoundException e) {
aoqi@0:             e.printStackTrace();
aoqi@0:             throw new IllegalStateException("Can't find ReflectionNavigator class");
aoqi@0:         } catch (InvocationTargetException e) {
aoqi@0:             e.printStackTrace();
aoqi@0:             throw new IllegalStateException("ReflectionNavigator.getInstance throws the exception");
aoqi@0:         } catch (NoSuchMethodException e) {
aoqi@0:             e.printStackTrace();
aoqi@0:             throw new IllegalStateException("ReflectionNavigator.getInstance can't be found");
aoqi@0:         } catch (IllegalAccessException e) {
aoqi@0:             e.printStackTrace();
aoqi@0:             throw new IllegalStateException("ReflectionNavigator.getInstance method is inaccessible");
aoqi@0:         } catch (SecurityException e) {
aoqi@0:             LOGGER.log(Level.FINE, "Unable to access ReflectionNavigator.getInstance", e);
aoqi@0:             throw e;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * private constructor to avoid util class instantiating
aoqi@0:      */
aoqi@0:     private Utils() {
aoqi@0:     }
aoqi@0: }