1 /*

     2  * Copyright 2008-2009 Sun Microsystems, Inc.  All Rights Reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Sun designates this

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

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.nio.fs;

    27 

    28 import java.lang.reflect.*;

    29 import java.security.AccessController;

    30 import java.security.PrivilegedAction;

    31 

    32 /**

    33  * Utility class for reflection.

    34  */

    35 

    36 class Reflect {

    37     private Reflect() {}

    38 

    39     private static void setAccessible(final AccessibleObject ao) {

    40         AccessController.doPrivileged(new PrivilegedAction<Object>() {

    41                 @Override

    42                 public Object run() {

    43                     ao.setAccessible(true);

    44                     return null;

    45                 }});

    46     }

    47 

    48     /**

    49      * Lookup the field of a given class.

    50      */

    51     static Field lookupField(String className, String fieldName) {

    52         try {

    53             Class<?> cl = Class.forName(className);

    54             Field f = cl.getDeclaredField(fieldName);

    55             setAccessible(f);

    56             return f;

    57         } catch (ClassNotFoundException x) {

    58             throw new AssertionError(x);

    59         } catch (NoSuchFieldException x) {

    60             throw new AssertionError(x);

    61         }

    62     }

    63 }