Showing the changes to java/pkg/sun/reflect/misc/ReflectUtil.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 2005, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | |||
| 27 | package sun.reflect.misc; | ||
| 28 | |||
| 29 | import java.lang.reflect.Modifier; | ||
| 30 | import sun.reflect.Reflection; | ||
| 31 | |||
| 32 | public final class ReflectUtil { | ||
| 33 | |||
| 34 | private ReflectUtil() { | ||
| 35 | } | ||
| 36 | |||
| 37 | public static Class forName(String name) | ||
| 38 | throws ClassNotFoundException { | ||
| 39 | checkPackageAccess(name); | ||
| 40 | return Class.forName(name); | ||
| 41 | } | ||
| 42 | |||
| 43 | public static Object newInstance(Class cls) | ||
| 44 | throws InstantiationException, IllegalAccessException { | ||
| 45 | checkPackageAccess(cls); | ||
| 46 | return cls.newInstance(); | ||
| 47 | } | ||
| 48 | |||
| 49 | /* | ||
| 50 | * Reflection.ensureMemberAccess is overly-restrictive | ||
| 51 | * due to a bug. We awkwardly work around it for now. | ||
| 52 | */ | ||
| 53 | public static void ensureMemberAccess(Class currentClass, | ||
| 54 | Class memberClass, | ||
| 55 | Object target, | ||
| 56 | int modifiers) | ||
| 57 | throws IllegalAccessException | ||
| 58 | { | ||
| 59 | if (target == null && Modifier.isProtected(modifiers)) { | ||
| 60 | int mods = modifiers; | ||
| 61 | mods = mods & (~Modifier.PROTECTED); | ||
| 62 | mods = mods | Modifier.PUBLIC; | ||
| 63 | |||
| 64 | /* | ||
| 65 | * See if we fail because of class modifiers | ||
| 66 | */ | ||
| 67 | Reflection.ensureMemberAccess(currentClass, | ||
| 68 | memberClass, | ||
| 69 | target, | ||
| 70 | mods); | ||
| 71 | try { | ||
| 72 | /* | ||
| 73 | * We're still here so class access was ok. | ||
| 74 | * Now try with default field access. | ||
| 75 | */ | ||
| 76 | mods = mods & (~Modifier.PUBLIC); | ||
| 77 | Reflection.ensureMemberAccess(currentClass, | ||
| 78 | memberClass, | ||
| 79 | target, | ||
| 80 | mods); | ||
| 81 | /* | ||
| 82 | * We're still here so access is ok without | ||
| 83 | * checking for protected. | ||
| 84 | */ | ||
| 85 | return; | ||
| 86 | } catch (IllegalAccessException e) { | ||
| 87 | /* | ||
| 88 | * Access failed but we're 'protected' so | ||
| 89 | * if the test below succeeds then we're ok. | ||
| 90 | */ | ||
| 91 | if (isSubclassOf(currentClass, memberClass)) { | ||
| 92 | return; | ||
| 93 | } else { | ||
| 94 | throw e; | ||
| 95 | } | ||
| 96 | } | ||
| 97 | } else { | ||
| 98 | Reflection.ensureMemberAccess(currentClass, | ||
| 99 | memberClass, | ||
| 100 | target, | ||
| 101 | modifiers); | ||
| 102 | } | ||
| 103 | } | ||
| 104 | |||
| 105 | private static boolean isSubclassOf(Class queryClass, | ||
| 106 | Class ofClass) | ||
| 107 | { | ||
| 108 | while (queryClass != null) { | ||
| 109 | if (queryClass == ofClass) { | ||
| 110 | return true; | ||
| 111 | } | ||
| 112 | queryClass = queryClass.getSuperclass(); | ||
| 113 | } | ||
| 114 | return false; | ||
| 115 | } | ||
| 116 | |||
| 117 | |||
| 118 | public static void checkPackageAccess(Class clazz) { | ||
| 119 | checkPackageAccess(clazz.getName()); | ||
| 120 | } | ||
| 121 | |||
| 122 | public static void checkPackageAccess(String name) { | ||
| 123 | SecurityManager s = System.getSecurityManager(); | ||
| 124 | if (s != null) { | ||
| 125 | String cname = name.replace('/', '.'); | ||
| 126 | if (cname.startsWith("[")) { | ||
| 127 | int b = cname.lastIndexOf('[') + 2; | ||
| 128 | if (b > 1 && b < cname.length()) { | ||
| 129 | cname = cname.substring(b); | ||
| 130 | } | ||
| 131 | } | ||
| 132 | int i = cname.lastIndexOf('.'); | ||
| 133 | if (i != -1) { | ||
| 134 | s.checkPackageAccess(cname.substring(0, i)); | ||
| 135 | } | ||
| 136 | } | ||
| 137 | } | ||
| 138 | |||
| 139 | public static boolean isPackageAccessible(Class clazz) { | ||
| 140 | try { | ||
| 141 | checkPackageAccess(clazz); | ||
| 142 | } catch (SecurityException e) { | ||
| 143 | return false; | ||
| 144 | } | ||
| 145 | return true; | ||
| 146 | } | ||
| 147 | } | ||