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| 1 | /* | ||
| 2 | * Copyright (c) 1999, 2006, 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 | package com.sun.naming.internal; | ||
| 27 | |||
| 28 | import java.io.InputStream; | ||
| 29 | import java.io.IOException; | ||
| 30 | import java.net.MalformedURLException; | ||
| 31 | import java.net.URLClassLoader; | ||
| 32 | import java.net.URL; | ||
| 33 | import java.security.AccessController; | ||
| 34 | import java.security.PrivilegedAction; | ||
| 35 | import java.security.PrivilegedActionException; | ||
| 36 | import java.security.PrivilegedExceptionAction; | ||
| 37 | import java.util.Enumeration; | ||
| 38 | import java.util.Hashtable; | ||
| 39 | import java.util.NoSuchElementException; | ||
| 40 | import java.util.Properties; | ||
| 41 | |||
| 42 | import javax.naming.*; | ||
| 43 | |||
| 44 | /** | ||
| 45 | * VersionHelper was used by JNDI to accommodate differences between | ||
| 46 | * JDK 1.1.x and the Java 2 platform. As this is no longer necessary | ||
| 47 | * since JNDI's inclusion in the platform, this class currently | ||
| 48 | * serves as a set of utilities for performing system-level things, | ||
| 49 | * such as class-loading and reading system properties. | ||
| 50 | * | ||
| 51 | * @author Rosanna Lee | ||
| 52 | * @author Scott Seligman | ||
| 53 | */ | ||
| 54 | |||
| 55 | final class VersionHelper12 extends VersionHelper { | ||
| 56 | |||
| 57 | private boolean getSystemPropsFailed = false; | ||
| 58 | |||
| 59 | VersionHelper12() {} // Disallow external from creating one of these. | ||
| 60 | |||
| 61 | public Class loadClass(String className) throws ClassNotFoundException { | ||
| 62 | ClassLoader cl = getContextClassLoader(); | ||
| 63 | return Class.forName(className, true, cl); | ||
| 64 | } | ||
| 65 | |||
| 66 | /** | ||
| 67 | * Package private. | ||
| 68 | */ | ||
| 69 | Class loadClass(String className, ClassLoader cl) | ||
| 70 | throws ClassNotFoundException { | ||
| 71 | return Class.forName(className, true, cl); | ||
| 72 | } | ||
| 73 | |||
| 74 | /** | ||
| 75 | * @param className A non-null fully qualified class name. | ||
| 76 | * @param codebase A non-null, space-separated list of URL strings. | ||
| 77 | */ | ||
| 78 | public Class loadClass(String className, String codebase) | ||
| 79 | throws ClassNotFoundException, MalformedURLException { | ||
| 80 | ClassLoader cl; | ||
| 81 | |||
| 82 | ClassLoader parent = getContextClassLoader(); | ||
| 83 | cl = URLClassLoader.newInstance(getUrlArray(codebase), parent); | ||
| 84 | |||
| 85 | return Class.forName(className, true, cl); | ||
| 86 | } | ||
| 87 | |||
| 88 | String getJndiProperty(final int i) { | ||
| 89 | return (String) AccessController.doPrivileged( | ||
| 90 | new PrivilegedAction() { | ||
| 91 | public Object run() { | ||
| 92 | try { | ||
| 93 | return System.getProperty(PROPS[i]); | ||
| 94 | } catch (SecurityException e) { | ||
| 95 | return null; | ||
| 96 | } | ||
| 97 | } | ||
| 98 | } | ||
| 99 | ); | ||
| 100 | } | ||
| 101 | |||
| 102 | String[] getJndiProperties() { | ||
| 103 | if (getSystemPropsFailed) { | ||
| 104 | return null; // after one failure, don't bother trying again | ||
| 105 | } | ||
| 106 | Properties sysProps = (Properties) AccessController.doPrivileged( | ||
| 107 | new PrivilegedAction() { | ||
| 108 | public Object run() { | ||
| 109 | try { | ||
| 110 | return System.getProperties(); | ||
| 111 | } catch (SecurityException e) { | ||
| 112 | getSystemPropsFailed = true; | ||
| 113 | return null; | ||
| 114 | } | ||
| 115 | } | ||
| 116 | } | ||
| 117 | ); | ||
| 118 | if (sysProps == null) { | ||
| 119 | return null; | ||
| 120 | } | ||
| 121 | String[] jProps = new String[PROPS.length]; | ||
| 122 | for (int i = 0; i < PROPS.length; i++) { | ||
| 123 | jProps[i] = sysProps.getProperty(PROPS[i]); | ||
| 124 | } | ||
| 125 | return jProps; | ||
| 126 | } | ||
| 127 | |||
| 128 | InputStream getResourceAsStream(final Class c, final String name) { | ||
| 129 | return (InputStream) AccessController.doPrivileged( | ||
| 130 | new PrivilegedAction() { | ||
| 131 | public Object run() { | ||
| 132 | return c.getResourceAsStream(name); | ||
| 133 | } | ||
| 134 | } | ||
| 135 | ); | ||
| 136 | } | ||
| 137 | |||
| 138 | InputStream getJavaHomeLibStream(final String filename) { | ||
| 139 | return (InputStream) AccessController.doPrivileged( | ||
| 140 | new PrivilegedAction() { | ||
| 141 | public Object run() { | ||
| 142 | try { | ||
| 143 | String javahome = System.getProperty("java.home"); | ||
| 144 | if (javahome == null) { | ||
| 145 | return null; | ||
| 146 | } | ||
| 147 | String pathname = javahome + java.io.File.separator + | ||
| 148 | "lib" + java.io.File.separator + filename; | ||
| 149 | return new java.io.FileInputStream(pathname); | ||
| 150 | } catch (Exception e) { | ||
| 151 | return null; | ||
| 152 | } | ||
| 153 | } | ||
| 154 | } | ||
| 155 | ); | ||
| 156 | } | ||
| 157 | |||
| 158 | NamingEnumeration getResources(final ClassLoader cl, final String name) | ||
| 159 | throws IOException | ||
| 160 | { | ||
| 161 | Enumeration urls; | ||
| 162 | try { | ||
| 163 | urls = (Enumeration) AccessController.doPrivileged( | ||
| 164 | new PrivilegedExceptionAction() { | ||
| 165 | public Object run() throws IOException { | ||
| 166 | return (cl == null) | ||
| 167 | ? ClassLoader.getSystemResources(name) | ||
| 168 | : cl.getResources(name); | ||
| 169 | } | ||
| 170 | } | ||
| 171 | ); | ||
| 172 | } catch (PrivilegedActionException e) { | ||
| 173 | throw (IOException)e.getException(); | ||
| 174 | } | ||
| 175 | return new InputStreamEnumeration(urls); | ||
| 176 | } | ||
| 177 | |||
| 178 | ClassLoader getContextClassLoader() { | ||
| 179 | return (ClassLoader) AccessController.doPrivileged( | ||
| 180 | new PrivilegedAction() { | ||
| 181 | public Object run() { | ||
| 182 | return Thread.currentThread().getContextClassLoader(); | ||
| 183 | } | ||
| 184 | } | ||
| 185 | ); | ||
| 186 | } | ||
| 187 | |||
| 188 | |||
| 189 | /** | ||
| 190 | * Given an enumeration of URLs, an instance of this class represents | ||
| 191 | * an enumeration of their InputStreams. Each operation on the URL | ||
| 192 | * enumeration is performed within a doPrivileged block. | ||
| 193 | * This is used to enumerate the resources under a foreign codebase. | ||
| 194 | * This class is not MT-safe. | ||
| 195 | */ | ||
| 196 | class InputStreamEnumeration implements NamingEnumeration { | ||
| 197 | |||
| 198 | private final Enumeration urls; | ||
| 199 | |||
| 200 | private Object nextElement = null; | ||
| 201 | |||
| 202 | InputStreamEnumeration(Enumeration urls) { | ||
| 203 | this.urls = urls; | ||
| 204 | } | ||
| 205 | |||
| 206 | /* | ||
| 207 | * Returns the next InputStream, or null if there are no more. | ||
| 208 | * An InputStream that cannot be opened is skipped. | ||
| 209 | */ | ||
| 210 | private Object getNextElement() { | ||
| 211 | return AccessController.doPrivileged( | ||
| 212 | new PrivilegedAction() { | ||
| 213 | public Object run() { | ||
| 214 | while (urls.hasMoreElements()) { | ||
| 215 | try { | ||
| 216 | return ((URL)urls.nextElement()).openStream(); | ||
| 217 | } catch (IOException e) { | ||
| 218 | // skip this URL | ||
| 219 | } | ||
| 220 | } | ||
| 221 | return null; | ||
| 222 | } | ||
| 223 | } | ||
| 224 | ); | ||
| 225 | } | ||
| 226 | |||
| 227 | public boolean hasMore() { | ||
| 228 | if (nextElement != null) { | ||
| 229 | return true; | ||
| 230 | } | ||
| 231 | nextElement = getNextElement(); | ||
| 232 | return (nextElement != null); | ||
| 233 | } | ||
| 234 | |||
| 235 | public boolean hasMoreElements() { | ||
| 236 | return hasMore(); | ||
| 237 | } | ||
| 238 | |||
| 239 | public Object next() { | ||
| 240 | if (hasMore()) { | ||
| 241 | Object res = nextElement; | ||
| 242 | nextElement = null; | ||
| 243 | return res; | ||
| 244 | } else { | ||
| 245 | throw new NoSuchElementException(); | ||
| 246 | } | ||
| 247 | } | ||
| 248 | |||
| 249 | public Object nextElement() { | ||
| 250 | return next(); | ||
| 251 | } | ||
| 252 | |||
| 253 | public void close() { | ||
| 254 | } | ||
| 255 | } | ||
| 256 | } | ||