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 | +} | |