| /* |
| * Copyright (c) 2014, 2018, 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. |
| * |
| * 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 gc.g1.unloading.classloaders; |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.security.CodeSigner; |
| import java.security.CodeSource; |
| |
| /** |
| * |
| * This is just a classloader that doesn't follow delegation pattern. |
| * |
| */ |
| public class DoItYourselfClassLoader extends FinalizableClassloader { |
| |
| private static long counter = 0; |
| |
| /** |
| * We force different classes to have different protection domains |
| */ |
| public Class<?> defineClass(String name, byte[] bytes) { |
| URL url; |
| try { |
| url = new URL("http://random.url.com/" + (counter++)); |
| } catch (MalformedURLException e) { |
| throw new RuntimeException("This is impossible, but there is mistake in simple call to URL constructor", e); |
| } |
| return defineClass(name, bytes, 0, bytes.length, new CodeSource(url, new CodeSigner[] {})); |
| } |
| |
| } |