russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
81 lines
3 KiB
Java
81 lines
3 KiB
Java
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.lang.invoke.MethodHandleProxies;
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import java.lang.invoke.MethodHandles;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Executable;
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import java.lang.reflect.Parameter;
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import java.util.stream.Stream;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.MethodSource;
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import static org.junit.jupiter.api.Assertions.*;
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/*
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* @test
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* @bug 8357728
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* @summary Synthetic parameter names should not be retained.
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* @modules java.base/java.lang.reflect:+open
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* @run junit SyntheticNameRetention
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*/
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public class SyntheticNameRetention {
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class Inner {
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Inner() {}
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}
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public interface NameGetter {
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String getRawName(Parameter parameter);
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}
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static final NameGetter GETTER;
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static {
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try {
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var lookup = MethodHandles.privateLookupIn(Parameter.class, MethodHandles.lookup());
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GETTER = MethodHandleProxies.asInterfaceInstance(NameGetter.class, lookup.findGetter(Parameter.class, "name", String.class));
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} catch (ReflectiveOperationException ex) {
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throw new ExceptionInInitializerError(ex);
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}
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}
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static Stream<Executable> methods() throws Throwable {
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return Stream.of(Inner.class.getDeclaredConstructor(SyntheticNameRetention.class), // Has MethodParameters with flags
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SyntheticNameRetention.class.getDeclaredMethod("test", Executable.class)); // No MethodParameters
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}
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@ParameterizedTest
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@MethodSource("methods")
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public void test(Executable exec) {
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var params = exec.getParameters();
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for (int i = 0; i < params.length; i++) {
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var param = params[i];
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assertEquals("arg" + i, param.getName(), "name " + i);
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assertFalse(param.isNamePresent(), "name present " + i);
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assertNull(GETTER.getRawName(param), "raw name " + i);
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boolean mandated = exec instanceof Constructor<?> && i == 0;
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assertEquals(mandated, param.isImplicit(), "mandated " + i);
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}
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}
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}
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