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/*
* 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");
}
}
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