| /* |
| * Copyright (c) 2017, 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. |
| */ |
| |
| import java.io.PrintStream; |
| |
| /* |
| * Custom system class loader. |
| */ |
| public class CustomLoader extends ClassLoader { |
| private static PrintStream out = System.out; |
| public static ClassLoader INSTANCE; |
| |
| public CustomLoader(ClassLoader classLoader) { |
| super("CustomSystemLoader", classLoader); |
| assert INSTANCE == null; |
| INSTANCE = this; |
| |
| // test cases to validate that ClassLoader::getSystemClassLoader |
| // is not triggered during custom system class loader initialization |
| testEnumValueOf(); |
| } |
| |
| static void testEnumValueOf() { |
| TestEnum e = java.lang.Enum.valueOf(TestEnum.class, "C1"); |
| if (e != TestEnum.C1) { |
| throw new RuntimeException("Expected: " + TestEnum.C1 + " got: " + e); |
| } |
| } |
| |
| @Override |
| public Class<?> loadClass(String name) throws ClassNotFoundException { |
| out.println("CustomLoader: loading class: " + name); |
| return super.loadClass(name); |
| } |
| |
| static enum TestEnum { |
| C1, C2, C3 |
| } |
| } |