| /* |
| * Copyright (c) 2005, 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 sun.reflect.misc; |
| |
| import java.lang.reflect.Modifier; |
| import sun.reflect.Reflection; |
| |
| public final class ReflectUtil { |
| |
| private ReflectUtil() { |
| } |
| |
| public static Class forName(String name) |
| throws ClassNotFoundException { |
| checkPackageAccess(name); |
| return Class.forName(name); |
| } |
| |
| public static Object newInstance(Class cls) |
| throws InstantiationException, IllegalAccessException { |
| checkPackageAccess(cls); |
| return cls.newInstance(); |
| } |
| |
| /* |
| * Reflection.ensureMemberAccess is overly-restrictive |
| * due to a bug. We awkwardly work around it for now. |
| */ |
| public static void ensureMemberAccess(Class currentClass, |
| Class memberClass, |
| Object target, |
| int modifiers) |
| throws IllegalAccessException |
| { |
| if (target == null && Modifier.isProtected(modifiers)) { |
| int mods = modifiers; |
| mods = mods & (~Modifier.PROTECTED); |
| mods = mods | Modifier.PUBLIC; |
| |
| /* |
| * See if we fail because of class modifiers |
| */ |
| Reflection.ensureMemberAccess(currentClass, |
| memberClass, |
| target, |
| mods); |
| try { |
| /* |
| * We're still here so class access was ok. |
| * Now try with default field access. |
| */ |
| mods = mods & (~Modifier.PUBLIC); |
| Reflection.ensureMemberAccess(currentClass, |
| memberClass, |
| target, |
| mods); |
| /* |
| * We're still here so access is ok without |
| * checking for protected. |
| */ |
| return; |
| } catch (IllegalAccessException e) { |
| /* |
| * Access failed but we're 'protected' so |
| * if the test below succeeds then we're ok. |
| */ |
| if (isSubclassOf(currentClass, memberClass)) { |
| return; |
| } else { |
| throw e; |
| } |
| } |
| } else { |
| Reflection.ensureMemberAccess(currentClass, |
| memberClass, |
| target, |
| modifiers); |
| } |
| } |
| |
| private static boolean isSubclassOf(Class queryClass, |
| Class ofClass) |
| { |
| while (queryClass != null) { |
| if (queryClass == ofClass) { |
| return true; |
| } |
| queryClass = queryClass.getSuperclass(); |
| } |
| return false; |
| } |
| |
| |
| public static void checkPackageAccess(Class clazz) { |
| checkPackageAccess(clazz.getName()); |
| } |
| |
| public static void checkPackageAccess(String name) { |
| SecurityManager s = System.getSecurityManager(); |
| if (s != null) { |
| String cname = name.replace('/', '.'); |
| if (cname.startsWith("[")) { |
| int b = cname.lastIndexOf('[') + 2; |
| if (b > 1 && b < cname.length()) { |
| cname = cname.substring(b); |
| } |
| } |
| int i = cname.lastIndexOf('.'); |
| if (i != -1) { |
| s.checkPackageAccess(cname.substring(0, i)); |
| } |
| } |
| } |
| |
| public static boolean isPackageAccessible(Class clazz) { |
| try { |
| checkPackageAccess(clazz); |
| } catch (SecurityException e) { |
| return false; |
| } |
| return true; |
| } |
| } |