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