| /* |
| * Copyright (c) 1999, 2006, 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.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import java.util.StringTokenizer; |
| import java.util.Vector; |
| |
| 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 abstract class VersionHelper { |
| private static VersionHelper helper = null; |
| |
| 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. |
| |
| static { |
| helper = new VersionHelper12(); |
| } |
| |
| public static VersionHelper getVersionHelper() { |
| return helper; |
| } |
| |
| public abstract Class loadClass(String className) |
| throws ClassNotFoundException; |
| |
| abstract Class loadClass(String className, ClassLoader cl) |
| throws ClassNotFoundException; |
| |
| public abstract Class loadClass(String className, String codebase) |
| throws ClassNotFoundException, MalformedURLException; |
| |
| /* |
| * 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. |
| */ |
| abstract String getJndiProperty(int i); |
| |
| /* |
| * Reads each property in PROPS from the system properties, and |
| * returns their values -- in order -- in an array. For each |
| * unset property, the corresponding array element is set to null. |
| * Returns null if there is no permission to call System.getProperties(). |
| */ |
| abstract String[] getJndiProperties(); |
| |
| /* |
| * Returns the resource of a given name associated with a particular |
| * class (never null), or null if none can be found. |
| */ |
| abstract InputStream getResourceAsStream(Class c, String name); |
| |
| /* |
| * Returns an input stream for a file in <java.home>/lib, |
| * or null if it cannot be located or opened. |
| * |
| * @param filename The file name, sans directory. |
| */ |
| abstract InputStream getJavaHomeLibStream(String filename); |
| |
| /* |
| * Returns an enumeration (never null) of InputStreams of the |
| * resources of a given name associated with a particular class |
| * loader. Null represents the bootstrap class loader in some |
| * Java implementations. |
| */ |
| abstract NamingEnumeration getResources(ClassLoader cl, String name) |
| throws IOException; |
| |
| /* |
| * Returns the context class loader associated with the current thread. |
| * Null indicates the bootstrap class loader in some Java implementations. |
| * |
| * @throws SecurityException if the class loader is not accessible. |
| */ |
| abstract ClassLoader getContextClassLoader(); |
| |
| static protected URL[] getUrlArray(String codebase) |
| throws MalformedURLException { |
| // Parse codebase into separate URLs |
| StringTokenizer parser = new StringTokenizer(codebase); |
| Vector vec = new Vector(10); |
| while (parser.hasMoreTokens()) { |
| vec.addElement(parser.nextToken()); |
| } |
| String[] url = new String[vec.size()]; |
| for (int i = 0; i < url.length; i++) { |
| url[i] = (String)vec.elementAt(i); |
| } |
| |
| URL[] urlArray = new URL[url.length]; |
| for (int i = 0; i < urlArray.length; i++) { |
| urlArray[i] = new URL(url[i]); |
| } |
| return urlArray; |
| } |
| } |