93 lines
3.0 KiB
Java
93 lines
3.0 KiB
Java
|
/*
|
||
|
|
* Copyright (c) 2024, 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.Serializable;
|
||
|
|
import java.lang.invoke.MethodHandles;
|
||
|
|
import java.lang.invoke.MethodType;
|
||
|
|
import java.util.function.IntSupplier;
|
||
|
|
|
||
|
|
import org.junit.jupiter.api.BeforeAll;
|
||
|
|
import org.junit.jupiter.api.Test;
|
||
|
|
|
||
|
|
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||
|
|
import static org.junit.jupiter.api.Assertions.assertTrue;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* @test
|
||
|
|
* @bug 8343064
|
||
|
|
* @summary Test about when lambda caller/target class is a hidden class
|
||
|
|
* @run junit LambdaHiddenCaller
|
||
|
|
*/
|
||
|
|
public class LambdaHiddenCaller {
|
||
|
|
static Hooks hiddenCaller;
|
||
|
|
|
||
|
|
@BeforeAll
|
||
|
|
static void setup() throws Throwable {
|
||
|
|
byte[] bytes;
|
||
|
|
try (var in = LambdaHiddenCaller.class.getResourceAsStream("HiddenHooks.class")) {
|
||
|
|
bytes = in.readAllBytes();
|
||
|
|
}
|
||
|
|
var hiddenClassLookup = MethodHandles.lookup().defineHiddenClass(bytes, true);
|
||
|
|
hiddenCaller = (Hooks) hiddenClassLookup.findConstructor(hiddenClassLookup.lookupClass(), MethodType.methodType(void.class))
|
||
|
|
.asType(MethodType.methodType(Hooks.class)).invokeExact();
|
||
|
|
}
|
||
|
|
|
||
|
|
@Test
|
||
|
|
void testStaticMethod() {
|
||
|
|
var is = hiddenCaller.callStaticMethodLambda();
|
||
|
|
assertEquals(42, is.getAsInt());
|
||
|
|
}
|
||
|
|
|
||
|
|
@Test
|
||
|
|
void testSerializableLambda() {
|
||
|
|
var is = hiddenCaller.callSerializableLambda();
|
||
|
|
assertEquals(42, is.getAsInt());
|
||
|
|
assertTrue(Serializable.class.isAssignableFrom(is.getClass()));
|
||
|
|
// We do not guarantee serialization functionalities yet
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Hooks to call hidden class methods easily.
|
||
|
|
*/
|
||
|
|
interface Hooks {
|
||
|
|
IntSupplier callStaticMethodLambda();
|
||
|
|
|
||
|
|
IntSupplier callSerializableLambda();
|
||
|
|
}
|
||
|
|
|
||
|
|
class HiddenHooks implements Hooks {
|
||
|
|
private static int compute() {
|
||
|
|
return 42;
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
public IntSupplier callStaticMethodLambda() {
|
||
|
|
return HiddenHooks::compute;
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
public IntSupplier callSerializableLambda() {
|
||
|
|
return (IntSupplier & Serializable) HiddenHooks::compute;
|
||
|
|
}
|
||
|
|
}
|