Thu, 25 Jul 2013 14:51:40 +0100
8020843: javac crashes on accessibility check with method reference with typevar receiver
Summary: method reference overload check doesn't walk through type-variable receivers
Reviewed-by: jjg
mcimadamore@1415 | 1 | /* |
mcimadamore@1415 | 2 | * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
mcimadamore@1415 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
mcimadamore@1415 | 4 | * |
mcimadamore@1415 | 5 | * This code is free software; you can redistribute it and/or modify it |
mcimadamore@1415 | 6 | * under the terms of the GNU General Public License version 2 only, as |
mcimadamore@1415 | 7 | * published by the Free Software Foundation. |
mcimadamore@1415 | 8 | * |
mcimadamore@1415 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
mcimadamore@1415 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
mcimadamore@1415 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
mcimadamore@1415 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
mcimadamore@1415 | 13 | * accompanied this code). |
mcimadamore@1415 | 14 | * |
mcimadamore@1415 | 15 | * You should have received a copy of the GNU General Public License version |
mcimadamore@1415 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
mcimadamore@1415 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
mcimadamore@1415 | 18 | * |
mcimadamore@1415 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
mcimadamore@1415 | 20 | * or visit www.oracle.com if you need additional information or have any |
mcimadamore@1415 | 21 | * questions. |
mcimadamore@1415 | 22 | */ |
mcimadamore@1415 | 23 | |
mcimadamore@1415 | 24 | /** |
mcimadamore@1415 | 25 | * @test |
mcimadamore@1415 | 26 | * @bug 8003280 |
mcimadamore@1415 | 27 | * @summary Add lambda tests |
mcimadamore@1415 | 28 | * Test bridge methods for certain SAM conversions |
mcimadamore@1415 | 29 | * @compile LambdaTest6.java |
mcimadamore@1415 | 30 | * @run main LambdaTest6 |
mcimadamore@1415 | 31 | */ |
mcimadamore@1415 | 32 | |
mcimadamore@1415 | 33 | import java.lang.reflect.Method; |
mcimadamore@1415 | 34 | import java.util.HashSet; |
mcimadamore@1415 | 35 | import java.util.Set; |
mcimadamore@1415 | 36 | |
mcimadamore@1415 | 37 | public class LambdaTest6<T> { |
mcimadamore@1415 | 38 | |
mcimadamore@1415 | 39 | interface H {Object m();} |
mcimadamore@1415 | 40 | |
mcimadamore@1415 | 41 | interface K<U> {void m(U element);} |
mcimadamore@1415 | 42 | |
mcimadamore@1415 | 43 | interface L extends K<String> {} //generic substitution |
mcimadamore@1415 | 44 | |
mcimadamore@1415 | 45 | interface M {void m(String s);} |
mcimadamore@1415 | 46 | |
mcimadamore@1415 | 47 | interface KM extends K<String>, M{} //generic substitution |
mcimadamore@1415 | 48 | |
mcimadamore@1415 | 49 | interface N extends H {String m();} //covariant return |
mcimadamore@1415 | 50 | |
mcimadamore@1415 | 51 | private static void assertTrue(boolean b) { |
mcimadamore@1415 | 52 | if(!b) |
mcimadamore@1415 | 53 | throw new AssertionError(); |
mcimadamore@1415 | 54 | } |
mcimadamore@1415 | 55 | |
mcimadamore@1415 | 56 | private Set<String> setOfStringObject() { |
mcimadamore@1415 | 57 | Set<String> s = new HashSet<>(); |
mcimadamore@1415 | 58 | s.add("java.lang.String"); |
mcimadamore@1415 | 59 | s.add("java.lang.Object"); |
mcimadamore@1415 | 60 | return s; |
mcimadamore@1415 | 61 | } |
mcimadamore@1415 | 62 | |
mcimadamore@1415 | 63 | private void test1() |
mcimadamore@1415 | 64 | { |
mcimadamore@1415 | 65 | L la = s -> { }; |
mcimadamore@1415 | 66 | la.m("hi"); |
mcimadamore@1415 | 67 | Class<? extends L> c1 = la.getClass(); |
mcimadamore@1415 | 68 | Method[] methods = c1.getDeclaredMethods(); |
mcimadamore@1415 | 69 | Set<String> types = setOfStringObject(); |
mcimadamore@1415 | 70 | for(Method m : methods) { |
mcimadamore@1415 | 71 | assertTrue(m.getName().equals("m")); |
mcimadamore@1415 | 72 | Class[] parameterTypes = m.getParameterTypes(); |
mcimadamore@1415 | 73 | assertTrue(parameterTypes.length == 1); |
mcimadamore@1415 | 74 | assertTrue(types.remove(parameterTypes[0].getName())); |
mcimadamore@1415 | 75 | } |
mcimadamore@1415 | 76 | assertTrue(types.isEmpty() || (types.size() == 1 && types.contains("java.lang.String"))); |
mcimadamore@1415 | 77 | } |
mcimadamore@1415 | 78 | |
mcimadamore@1415 | 79 | private void test2() |
mcimadamore@1415 | 80 | { |
mcimadamore@1415 | 81 | KM km = s -> { }; |
mcimadamore@1415 | 82 | //km.m("hi"); |
mcimadamore@1415 | 83 | Class<? extends KM> c2 = km.getClass(); |
mcimadamore@1415 | 84 | Method[] methods = c2.getDeclaredMethods(); |
mcimadamore@1415 | 85 | Set<String> types = setOfStringObject(); |
mcimadamore@1415 | 86 | for(Method m : methods) { |
mcimadamore@1415 | 87 | assertTrue(m.getName().equals("m")); |
mcimadamore@1415 | 88 | Class[] parameterTypes = m.getParameterTypes(); |
mcimadamore@1415 | 89 | assertTrue(parameterTypes.length == 1); |
mcimadamore@1415 | 90 | assertTrue(types.remove(parameterTypes[0].getName())); |
mcimadamore@1415 | 91 | } |
mcimadamore@1415 | 92 | assertTrue(types.isEmpty()); |
mcimadamore@1415 | 93 | } |
mcimadamore@1415 | 94 | |
mcimadamore@1415 | 95 | private void test3() |
mcimadamore@1415 | 96 | { |
mcimadamore@1415 | 97 | N na = ()-> "hi"; |
mcimadamore@1415 | 98 | assertTrue( na.m().equals("hi") ); |
mcimadamore@1415 | 99 | assertTrue( ((H)na).m().equals("hi") ); |
mcimadamore@1415 | 100 | Class<? extends N> c3 = na.getClass(); |
mcimadamore@1415 | 101 | Method[] methods = c3.getDeclaredMethods(); |
mcimadamore@1415 | 102 | Set<String> types = setOfStringObject(); |
mcimadamore@1415 | 103 | for(Method m : methods) { |
mcimadamore@1415 | 104 | assertTrue(m.getName().equals("m")); |
mcimadamore@1415 | 105 | Class returnType = m.getReturnType(); |
mcimadamore@1415 | 106 | assertTrue(types.remove(returnType.getName())); |
mcimadamore@1415 | 107 | } |
mcimadamore@1882 | 108 | assertTrue(types.size() == 1); //there's a bridge |
mcimadamore@1415 | 109 | } |
mcimadamore@1415 | 110 | |
mcimadamore@1415 | 111 | |
mcimadamore@1415 | 112 | public static void main(String[] args) { |
mcimadamore@1415 | 113 | LambdaTest6 test = new LambdaTest6(); |
mcimadamore@1415 | 114 | test.test1(); |
mcimadamore@1415 | 115 | test.test2(); |
mcimadamore@1415 | 116 | test.test3(); |
mcimadamore@1415 | 117 | } |
mcimadamore@1415 | 118 | } |