Mercurial > jdk8-mips64-public > langtools / annotate
test/tools/javac/lambda/methodReferenceExecution/MethodReferenceTestMethodHandle.java@ed1a48bedfa8 (annotated)
test/tools/javac/lambda/methodReferenceExecution/MethodReferenceTestMethodHandle.java
Wed, 24 Sep 2014 11:38:26 -0700
- author
- katleman
- date
- Wed, 24 Sep 2014 11:38:26 -0700
- changeset 2562
- ed1a48bedfa8
- parent 0
- 959103a6100f
- permissions
- -rw-r--r--
Added tag jdk8u40-b07 for changeset 2fa3858a281f
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
| aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
| aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
| aoqi@0 | 10 | * |
| aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 15 | * accompanied this code). |
| aoqi@0 | 16 | * |
| aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 20 | * |
| aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 23 | * questions. |
| aoqi@0 | 24 | */ |
| aoqi@0 | 25 | |
| aoqi@0 | 26 | /** |
| aoqi@0 | 27 | * @test |
| aoqi@0 | 28 | * @bug 8028739 |
| aoqi@0 | 29 | * @summary javac generates incorrect descriptor for MethodHandle::invoke |
| aoqi@0 | 30 | * @run testng MethodReferenceTestMethodHandle |
| aoqi@0 | 31 | */ |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | import java.lang.invoke.*; |
| aoqi@0 | 34 | import java.util.*; |
| aoqi@0 | 35 | |
| aoqi@0 | 36 | import org.testng.annotations.Test; |
| aoqi@0 | 37 | import static org.testng.Assert.assertEquals; |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | @Test |
| aoqi@0 | 40 | public class MethodReferenceTestMethodHandle { |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | MethodHandles.Lookup lookup = MethodHandles.lookup(); |
| aoqi@0 | 43 | |
| aoqi@0 | 44 | interface ReplaceItf { |
| aoqi@0 | 45 | Object apply(String a, char b, char c) throws Throwable; |
| aoqi@0 | 46 | } |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | interface FormatItf { |
| aoqi@0 | 49 | Object apply(String a, Object... args) throws Throwable; |
| aoqi@0 | 50 | } |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | interface AddItf { |
| aoqi@0 | 53 | void apply(List st, int idx, Object v) throws Throwable; |
| aoqi@0 | 54 | } |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | public void testVirtual() throws Throwable { |
| aoqi@0 | 57 | |
| aoqi@0 | 58 | MethodType mt = MethodType.methodType(String.class, char.class, char.class); |
| aoqi@0 | 59 | MethodHandle ms = lookup.findVirtual(String.class, "replace", mt); |
| aoqi@0 | 60 | |
| aoqi@0 | 61 | // --- String.replace(String, char, char) --- |
| aoqi@0 | 62 | |
| aoqi@0 | 63 | assertEquals("oome otring to oearch", ms.invoke("some string to search", 's', 'o')); |
| aoqi@0 | 64 | |
| aoqi@0 | 65 | ReplaceItf f1 = (a, b, c) -> ms.invoke(a,b,c); |
| aoqi@0 | 66 | assertEquals("oome otring to oearch", f1.apply("some string to search", 's', 'o')); |
| aoqi@0 | 67 | |
| aoqi@0 | 68 | ReplaceItf f2 = ms::invoke; |
| aoqi@0 | 69 | assertEquals("oome otring to oearch", f2.apply("some string to search", 's', 'o')); |
| aoqi@0 | 70 | assertEquals("oome otring to oearch", f2.apply("some string to search", new Character('s'), 'o')); |
| aoqi@0 | 71 | assertEquals("oome otring to oearch", ((ReplaceItf) ms::invoke).apply("some string to search", 's', 'o')); |
| aoqi@0 | 72 | } |
| aoqi@0 | 73 | |
| aoqi@0 | 74 | public void testStatic() throws Throwable { |
| aoqi@0 | 75 | MethodType fmt = MethodType.methodType(String.class, String.class, (new Object[1]).getClass()); |
| aoqi@0 | 76 | MethodHandle fms = lookup.findStatic(String.class, "format", fmt); |
| aoqi@0 | 77 | |
| aoqi@0 | 78 | // --- String.format(String, Object...) --- |
| aoqi@0 | 79 | |
| aoqi@0 | 80 | assertEquals("Testing One 2 3", fms.invoke("Testing %s %d %x", "One", new Integer(2), 3)); |
| aoqi@0 | 81 | |
| aoqi@0 | 82 | FormatItf ff2 = fms::invoke; |
| aoqi@0 | 83 | assertEquals("Testing One 2 3", ff2.apply("Testing %s %d %x", "One", new Integer(2), 3)); |
| aoqi@0 | 84 | assertEquals("Testing One 2 3", ((FormatItf) fms::invoke).apply("Testing %s %d %x", "One", new Integer(2), 3)); |
| aoqi@0 | 85 | assertEquals("Testing One 2 3 four", ff2.apply("Testing %s %d %x %s", "One", new Integer(2), 3, "four")); |
| aoqi@0 | 86 | } |
| aoqi@0 | 87 | |
| aoqi@0 | 88 | public void testVoid() throws Throwable { |
| aoqi@0 | 89 | MethodType pmt = MethodType.methodType(void.class, int.class, Object.class); |
| aoqi@0 | 90 | MethodHandle pms = lookup.findVirtual(List.class, "add", pmt); |
| aoqi@0 | 91 | List<String> list = new ArrayList<>(); |
| aoqi@0 | 92 | |
| aoqi@0 | 93 | // --- List.add(int,String) --- |
| aoqi@0 | 94 | |
| aoqi@0 | 95 | pms.invoke(list, 0, "Hi"); |
| aoqi@0 | 96 | |
| aoqi@0 | 97 | AddItf pf2 = pms::invoke; |
| aoqi@0 | 98 | pf2.apply(list, 1, "there"); |
| aoqi@0 | 99 | AddItf pf3 = pms::invokeExact; |
| aoqi@0 | 100 | pf3.apply(list, 2, "you"); |
| aoqi@0 | 101 | assertEquals("Hi", list.get(0)); |
| aoqi@0 | 102 | assertEquals("there", list.get(1)); |
| aoqi@0 | 103 | assertEquals("you", list.get(2)); |
| aoqi@0 | 104 | } |
| aoqi@0 | 105 | } |
