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.
85 lines
3.4 KiB
Java
85 lines
3.4 KiB
Java
/*
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* Copyright (c) 2017, 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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/* @test
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* @bug 8177146
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* @run junit/othervm TestMethodHandleBind
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*/
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodType;
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import static java.lang.invoke.MethodHandles.lookup;
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import static org.junit.jupiter.api.Assertions.*;
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import org.junit.jupiter.api.Test;
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public class TestMethodHandleBind extends pkg.A {
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static class B extends TestMethodHandleBind {}
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@Test
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public void testInstanceOfCallerClass() throws Throwable {
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MethodHandle bound = lookup().bind(new TestMethodHandleBind() , "m1", MethodType.methodType(String.class));
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String x = (String)bound.invoke();
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assertEquals(this.getClass().getSimpleName(), x);
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}
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@Test
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public void testInstanceOfCallerSubclass() throws Throwable {
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MethodHandle bound = lookup().bind(new B() , "m1", MethodType.methodType(String.class));
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// MethodHandle bound = lookup().findVirtual(B.class, "m1", MethodType.methodType(String.class)).bindTo(new B());
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String x = (String)bound.invoke();
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assertEquals("B", x);
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}
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@Test
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public void testInstanceOfReceiverClass() throws Throwable {
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assertThrows(IllegalAccessException.class, () -> lookup().bind(new pkg.A() , "m1", MethodType.methodType(String.class)));
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}
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@Test
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public void testPublicMethod() throws Throwable {
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MethodHandle bound = lookup().bind(new pkg.A() , "m2", MethodType.methodType(String.class));
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String x = (String)bound.invoke();
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assertEquals("A", x);
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}
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@Test
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public void testPublicMethod2() throws Throwable {
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MethodHandle bound = lookup().bind(new TestMethodHandleBind(), "m2", MethodType.methodType(String.class));
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String x = (String)bound.invoke();
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assertEquals(this.getClass().getSimpleName(), x);
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}
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@Test
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public void testInstanceOfCallerClassVarargs() throws Throwable {
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MethodHandle bound = lookup().bind(new TestMethodHandleBind() , "m3", MethodType.methodType(String.class, String[].class));
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String x = (String)bound.invoke("a", "b", "c");
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assertEquals(this.getClass().getSimpleName() + "abc", x);
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}
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@Test
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public void testInstanceOfReceiverClassVarargs() throws Throwable {
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assertThrows(IllegalAccessException.class, () -> lookup().bind(new pkg.A(), "m3", MethodType.methodType(String.class, String[].class)));
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}
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}
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