60 lines
2.0 KiB
Java
60 lines
2.0 KiB
Java
/*
|
|
* 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
|
|
}
|
|
}
|