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/*
* Copyright (c) 2025, 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.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.InvocationTargetException;
import java.util.stream.Stream;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import static org.junit.jupiter.api.Assertions.*;
/*
* @test
* @bug 8164714
* @summary Null check for immediate enclosing instance for VM/reflective
* invocation of inner classes
*
* @clean *
* @compile OuterThisNullChecks.java
* @run junit OuterThisNullChecks
*
* @clean *
* @compile --release 17 -XDnullCheckOuterThis=true OuterThisNullChecks.java
* @run junit OuterThisNullChecks
*/
class OuterThisNullChecks {
static Stream<Class<?>> testClasses() {
return Stream.of(NoOuterThis.class, OuterThisField.class);
}
@MethodSource("testClasses")
@ParameterizedTest
void testNoOuter(Class<?> clz) {
var ite = assertThrows(InvocationTargetException.class, () -> clz.getDeclaredConstructor(OuterThisNullChecks.class).newInstance((Object) null));
assertInstanceOf(NullPointerException.class, ite.getCause());
MethodHandle mh = assertDoesNotThrow(() -> MethodHandles.lookup().findConstructor(clz, MethodType.methodType(void.class, OuterThisNullChecks.class)))
.asType(MethodType.methodType(Object.class, Object.class));
assertThrows(NullPointerException.class, () -> {
Object stub = mh.invokeExact((Object) null);
});
}
class NoOuterThis {}
class OuterThisField {
@Override
public String toString() {
return "outer this = " + OuterThisNullChecks.this;
}
}
}
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