| /* |
| * Copyright (c) 1999, 2011, 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.jndi.ldap; |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| |
| abstract class VersionHelper { |
| |
| private static VersionHelper helper = null; |
| |
| VersionHelper() {} // Disallow anyone from creating one of these. |
| |
| static { |
| try { |
| Class.forName("java.net.URLClassLoader"); // 1.2 test |
| Class.forName("java.security.PrivilegedAction"); // 1.2 test |
| helper = (VersionHelper) |
| Class.forName( |
| "com.sun.jndi.ldap.VersionHelper12").newInstance(); |
| } catch (Exception e) { |
| } |
| |
| // Use 1.1 helper if 1.2 test fails, or if we cannot create 1.2 helper |
| if (helper == null) { |
| try { |
| helper = (VersionHelper) |
| Class.forName( |
| "com.sun.jndi.ldap.VersionHelper11").newInstance(); |
| } catch (Exception e) { |
| // should never happen |
| } |
| } |
| } |
| |
| static VersionHelper getVersionHelper() { |
| return helper; |
| } |
| |
| abstract ClassLoader getURLClassLoader(String[] url) |
| throws MalformedURLException; |
| |
| |
| static protected URL[] getUrlArray(String[] url) throws MalformedURLException { |
| URL[] urlArray = new URL[url.length]; |
| for (int i = 0; i < urlArray.length; i++) { |
| urlArray[i] = new URL(url[i]); |
| } |
| return urlArray; |
| } |
| |
| abstract Class<?> loadClass(String className) throws ClassNotFoundException; |
| |
| abstract Thread createThread(Runnable r); |
| } |