| /* ReflectUtil.java - JSR 166 reflection hooks |
| Copyright (C) 2006 Free Software Foundation |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package sun.reflect.misc; |
| |
| import java.lang.reflect.Modifier; |
| |
| public class ReflectUtil |
| { |
| // We use this inaccessible inner class as an argument type |
| // in verifyMemberAccess. All current users of this method |
| // in the JSR 166 RI pass 'null' for this argument, and |
| // consequently we don't know what it means. Using a funny |
| // type like this for the argument means that if the RI changes, |
| // we will see a compilation error. |
| private static class MustBeNull |
| { |
| } |
| |
| public static void checkPackageAccess(Class declaringClass) |
| { |
| // FIXME: not sure what to check here. |
| } |
| |
| /** |
| * Perform access checks on a member of a class. This API is |
| * derived from the public domain code in the JSR 166 reference |
| * implementation. |
| * @param caller the class requesting access to the member |
| * @param declarer the declaring class of the member |
| * @param ignored unknown parameter; always null |
| * @param modifiers the modifiers on the member |
| */ |
| public static void ensureMemberAccess(Class caller, |
| Class declarer, |
| MustBeNull ignored, |
| int modifiers) |
| { |
| // Same class, always ok. |
| if (caller == declarer) |
| return; |
| // Public access is ok. |
| if ((modifiers & Modifier.PUBLIC) != 0) |
| return; |
| // Protected access and request comes from |
| // a subclass of the declarer -- ok. |
| if ((modifiers & Modifier.PROTECTED) != 0 |
| && declarer.isAssignableFrom(caller)) |
| return; |
| // Package-private access, or protected access, |
| // and the packages are the same --ok. |
| if ((modifiers & Modifier.PRIVATE) == 0 |
| && caller.getPackage() == declarer.getPackage()) |
| return; |
| // Otherwise, no. |
| throw new IllegalAccessError(); |
| } |
| } |