| /* |
| * 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. |
| */ |
| |
| /* @test |
| * @bug 8184119 |
| * @summary test permutation when return value is directly derived from an argument |
| * @run testng/othervm test.java.lang.invoke.PermuteArgsReturnVoidTest |
| */ |
| |
| |
| package test.java.lang.invoke; |
| |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.MethodType; |
| |
| import static java.lang.invoke.MethodHandles.dropArguments; |
| import static java.lang.invoke.MethodHandles.identity; |
| |
| public class PermuteArgsReturnVoidTest { |
| |
| static String consumeIdentity(String s, int i1, int i2) { |
| return s; |
| } |
| |
| static void consumeVoid(String s, int i1, int i2) { |
| } |
| |
| @Test |
| public void testReturnOnStack() throws Throwable { |
| MethodHandles.Lookup l = MethodHandles.lookup(); |
| |
| MethodHandle consumeIdentity = l.findStatic( |
| PermuteArgsReturnVoidTest.class, "consumeIdentity", |
| MethodType.methodType(String.class, String.class, int.class, int.class)); |
| MethodHandle consumeVoid = l.findStatic( |
| PermuteArgsReturnVoidTest.class, "consumeVoid", |
| MethodType.methodType(void.class, String.class, int.class, int.class)); |
| |
| MethodHandle f = MethodHandles.foldArguments(consumeIdentity, consumeVoid); |
| |
| MethodHandle p = MethodHandles.permuteArguments(f, MethodType.methodType(String.class, String.class, int.class, int.class), 0, 2, 1); |
| |
| String s = (String) p.invoke("IN", 0, 0); |
| Assert.assertEquals(s.getClass(), String.class); |
| Assert.assertEquals(s, "IN"); |
| } |
| |
| @Test |
| public void testReturnFromArg() throws Throwable { |
| MethodHandles.Lookup l = MethodHandles.lookup(); |
| |
| MethodHandle consumeIdentity = dropArguments( |
| identity(String.class), 1, int.class, int.class); |
| MethodHandle consumeVoid = l.findStatic( |
| PermuteArgsReturnVoidTest.class, "consumeVoid", |
| MethodType.methodType(void.class, String.class, int.class, int.class)); |
| |
| MethodHandle f = MethodHandles.foldArguments(consumeIdentity, consumeVoid); |
| |
| MethodHandle p = MethodHandles.permuteArguments(f, MethodType.methodType(String.class, String.class, int.class, int.class), 0, 2, 1); |
| |
| String s = (String) p.invoke("IN", 0, 0); |
| Assert.assertEquals(s.getClass(), String.class); |
| Assert.assertEquals(s, "IN"); |
| } |
| } |