author | alundblad |
Wed, 26 Aug 2015 09:02:02 +0200 | |
changeset 32337 | c9d3ab9f601c |
parent 21892 | 8ab5aa58a900 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/** |
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* @test |
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* @bug 8028739 |
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* @summary javac generates incorrect descriptor for MethodHandle::invoke |
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* @run testng MethodReferenceTestMethodHandle |
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*/ |
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import java.lang.invoke.*; |
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import java.util.*; |
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import org.testng.annotations.Test; |
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import static org.testng.Assert.assertEquals; |
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@Test |
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public class MethodReferenceTestMethodHandle { |
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MethodHandles.Lookup lookup = MethodHandles.lookup(); |
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interface ReplaceItf { |
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Object apply(String a, char b, char c) throws Throwable; |
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} |
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interface FormatItf { |
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Object apply(String a, Object... args) throws Throwable; |
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} |
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interface AddItf { |
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void apply(List st, int idx, Object v) throws Throwable; |
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} |
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public void testVirtual() throws Throwable { |
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MethodType mt = MethodType.methodType(String.class, char.class, char.class); |
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MethodHandle ms = lookup.findVirtual(String.class, "replace", mt); |
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// --- String.replace(String, char, char) --- |
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assertEquals("oome otring to oearch", ms.invoke("some string to search", 's', 'o')); |
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ReplaceItf f1 = (a, b, c) -> ms.invoke(a,b,c); |
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assertEquals("oome otring to oearch", f1.apply("some string to search", 's', 'o')); |
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ReplaceItf f2 = ms::invoke; |
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assertEquals("oome otring to oearch", f2.apply("some string to search", 's', 'o')); |
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assertEquals("oome otring to oearch", f2.apply("some string to search", new Character('s'), 'o')); |
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assertEquals("oome otring to oearch", ((ReplaceItf) ms::invoke).apply("some string to search", 's', 'o')); |
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} |
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public void testStatic() throws Throwable { |
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MethodType fmt = MethodType.methodType(String.class, String.class, (new Object[1]).getClass()); |
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MethodHandle fms = lookup.findStatic(String.class, "format", fmt); |
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// --- String.format(String, Object...) --- |
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assertEquals("Testing One 2 3", fms.invoke("Testing %s %d %x", "One", new Integer(2), 3)); |
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FormatItf ff2 = fms::invoke; |
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assertEquals("Testing One 2 3", ff2.apply("Testing %s %d %x", "One", new Integer(2), 3)); |
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assertEquals("Testing One 2 3", ((FormatItf) fms::invoke).apply("Testing %s %d %x", "One", new Integer(2), 3)); |
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assertEquals("Testing One 2 3 four", ff2.apply("Testing %s %d %x %s", "One", new Integer(2), 3, "four")); |
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} |
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public void testVoid() throws Throwable { |
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MethodType pmt = MethodType.methodType(void.class, int.class, Object.class); |
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MethodHandle pms = lookup.findVirtual(List.class, "add", pmt); |
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List<String> list = new ArrayList<>(); |
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// --- List.add(int,String) --- |
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pms.invoke(list, 0, "Hi"); |
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AddItf pf2 = pms::invoke; |
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pf2.apply(list, 1, "there"); |
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AddItf pf3 = pms::invokeExact; |
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pf3.apply(list, 2, "you"); |
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assertEquals("Hi", list.get(0)); |
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assertEquals("there", list.get(1)); |
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assertEquals("you", list.get(2)); |
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} |
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} |