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/*
* 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
}
}
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