/* * Copyright (c) 2019, 2020, 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 8246774 * @summary Basic tests for ObjectMethods * @run testng ObjectMethodsTest * @run testng/othervm/java.security.policy=empty.policy ObjectMethodsTest import java.util.List;import java.lang.invoke.CallSite;import java.lang.invoke.MethodHandle;import java.lang.invoke.MethodHandles;import java.lang.invoke.MethodType;import java.lang.runtime.ObjectMethods;import org.testng.annotations.Test;import static java.lang.invoke.MethodType.methodType;import static org.testng.Assert .assertEquals;import static org.testng.Assert .assertThrows;import static org.testng.Assert .assertFalse;import static org.testng.Assert .assertTrue;public class ObjectMethodsTest {public static class C {static final MethodType EQUALS_DESC = methodType(boolean .class , C.class , Object.class );static final MethodType HASHCODE_DESC = methodType(int .class , C.class );static final MethodType TO_STRING_DESC = methodType(String.class , C.class );static final MethodHandle[] ACCESSORS = accessors();static final String NAME_LIST = "x;y" ;private static MethodHandle[] accessors() {try {return new MethodHandle[]{class , "x" , int .class ),class , "y" , int .class ),catch (Exception e) {throw new AssertionError(e);private final int x;private final int y;int x, int y) { this .x = x; this .y = y; }public int x() { return x; }public int y() { return y; }static class Empty {static final MethodType EQUALS_DESC = methodType(boolean .class , Empty.class , Object.class );static final MethodType HASHCODE_DESC = methodType(int .class , Empty.class );static final MethodType TO_STRING_DESC = methodType(String.class , Empty.class );static final MethodHandle[] ACCESSORS = new MethodHandle[] { };static final String NAME_LIST = "" ;static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();public void testEqualsC() throws Throwable {"equals" , C.EQUALS_DESC, C.class , C.NAME_LIST, C.ACCESSORS);new C(5, 5);boolean )handle.invokeExact(c, (Object)c));boolean )handle.invokeExact(c, (Object)new C(5, 5)));boolean )handle.invokeExact(c, (Object)new C(5, 4)));boolean )handle.invokeExact(c, (Object)new C(4, 5)));boolean )handle.invokeExact(c, (Object)null ));boolean )handle.invokeExact(c, new Object()));public void testEqualsEmpty() throws Throwable {"equals" , Empty.EQUALS_DESC, Empty.class , Empty.NAME_LIST, Empty.ACCESSORS);new Empty();boolean )handle.invokeExact(e, (Object)e));boolean )handle.invokeExact(e, (Object)new Empty()));boolean )handle.invokeExact(e, (Object)null ));boolean )handle.invokeExact(e, new Object()));public void testHashCodeC() throws Throwable {"hashCode" , C.HASHCODE_DESC, C.class , "x;y" , C.ACCESSORS);new C(6, 7);int hc = (int )handle.invokeExact(c);int )handle.invokeExact(new C(100, 1)), hashCombiner(100, 1));int )handle.invokeExact(new C(0, 0)), hashCombiner(0, 0));int )handle.invokeExact(new C(-1, 100)), hashCombiner(-1, 100));int )handle.invokeExact(new C(100, 1)), hashCombiner(100, 1));int )handle.invokeExact(new C(100, -1)), hashCombiner(100, -1));public void testHashCodeEmpty() throws Throwable {"hashCode" , Empty.HASHCODE_DESC, Empty.class , "" , Empty.ACCESSORS);new Empty();int )handle.invokeExact(e), 0);public void testToStringC() throws Throwable {"toString" , C.TO_STRING_DESC, C.class , C.NAME_LIST, C.ACCESSORS);new C(8, 9)), "C[x=8, y=9]" );new C(10, 11)), "C[x=10, y=11]" );new C(100, -9)), "C[x=100, y=-9]" );new C(0, 0)), "C[x=0, y=0]" );public void testToStringEmpty() throws Throwable {"toString" , Empty.TO_STRING_DESC, Empty.class , Empty.NAME_LIST, Empty.ACCESSORS);new Empty()), "Empty[]" );Class <NullPointerException> NPE = NullPointerException.class ;Class <IllegalArgumentException> IAE = IllegalArgumentException.class ;public void exceptions() {"badName" , C.EQUALS_DESC, C.class , C.NAME_LIST, C.ACCESSORS));"toString" , C.TO_STRING_DESC, C.class , "x;y;z" , C.ACCESSORS));"toString" , C.TO_STRING_DESC, C.class , "x;y" , new MethodHandle[]{}));"toString" , C.TO_STRING_DESC, this .getClass(), "x;y" , C.ACCESSORS));"toString" , C.EQUALS_DESC, C.class , "x;y" , C.ACCESSORS));"hashCode" , C.TO_STRING_DESC, C.class , "x;y" , C.ACCESSORS));"equals" , C.HASHCODE_DESC, C.class , "x;y" , C.ACCESSORS));new NamePlusType("toString" , C.TO_STRING_DESC),new NamePlusType("equals" , C.EQUALS_DESC),new NamePlusType("hashCode" , C.HASHCODE_DESC)for (NamePlusType npt : namePlusTypeList) {class , "x;y" , null ));class , "x;y" , new MethodHandle[]{null }));class , null , C.ACCESSORS));null , "x;y" , C.ACCESSORS));null , C.class , "x;y" , C.ACCESSORS));null , npt.mt(), C.class , "x;y" , C.ACCESSORS));null , npt.mn(), npt.mt(), C.class , "x;y" , C.ACCESSORS));// Based on the ObjectMethods internal implementation private static int hashCombiner(int x, int y) {return x*31 + y;quality 91%
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