/* * Copyright (c) 1999, 2014, 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 com.sun.naming.internal; import java.io.InputStream; import java.io.IOException; import java.io.File; import java.io.FileInputStream; import java.net.MalformedURLException; import java.net.URL; import java.util.StringTokenizer; import java.util.Vector; import java.util.NoSuchElementException; import java.util.Enumeration; import java.util.Properties; import java.net.URLClassLoader; import java.security.AccessController; import java.security.PrivilegedAction; import java.security.PrivilegedActionException; import java.security.PrivilegedExceptionAction; import javax.naming.NamingEnumeration; /** * VersionHelper was used by JNDI to accommodate differences between * JDK 1.1.x and the Java 2 platform. As this is no longer necessary * since JNDI's inclusion in the platform, this class currently * serves as a set of utilities for performing system-level things, * such as class-loading and reading system properties. * * @author Rosanna Lee * @author Scott Seligman */ public final class VersionHelper { private static VersionHelper helper = new VersionHelper(); final static String[] PROPS = new String[]{ javax.naming.Context.INITIAL_CONTEXT_FACTORY, javax.naming.Context.OBJECT_FACTORIES, javax.naming.Context.URL_PKG_PREFIXES, javax.naming.Context.STATE_FACTORIES, javax.naming.Context.PROVIDER_URL, javax.naming.Context.DNS_URL, // The following shouldn't create a runtime dependence on ldap package. javax.naming.ldap.LdapContext.CONTROL_FACTORIES }; public final static int INITIAL_CONTEXT_FACTORY = 0; public final static int OBJECT_FACTORIES = 1; public final static int URL_PKG_PREFIXES = 2; public final static int STATE_FACTORIES = 3; public final static int PROVIDER_URL = 4; public final static int DNS_URL = 5; public final static int CONTROL_FACTORIES = 6; VersionHelper() {} // Disallow anyone from creating one of these. public static VersionHelper getVersionHelper() { return helper; } public Class> loadClass(String className) throws ClassNotFoundException { return loadClass(className, getContextClassLoader()); } /** * Package private. *
* This internal method is used with Thread Context Class Loader (TCCL),
* please don't expose this method as public.
*/
Class> loadClass(String className, ClassLoader cl)
throws ClassNotFoundException {
Class> cls = Class.forName(className, true, cl);
return cls;
}
/**
* @param className A non-null fully qualified class name.
* @param codebase A non-null, space-separated list of URL strings.
*/
public Class> loadClass(String className, String codebase)
throws ClassNotFoundException, MalformedURLException {
ClassLoader parent = getContextClassLoader();
ClassLoader cl =
URLClassLoader.newInstance(getUrlArray(codebase), parent);
return loadClass(className, cl);
}
/*
* Returns a JNDI property from the system properties. Returns
* null if the property is not set, or if there is no permission
* to read it.
*/
String getJndiProperty(int i) {
PrivilegedAction
* This internal method returns Thread Context Class Loader (TCCL),
* if null, returns the system Class Loader.
*
* Please don't expose this method as public.
* @throws SecurityException if the class loader is not accessible.
*/
ClassLoader getContextClassLoader() {
PrivilegedAction