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
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2011, 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. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | */ |
aoqi@0 | 23 | |
aoqi@0 | 24 | /** |
aoqi@0 | 25 | * @test |
aoqi@0 | 26 | * @bug 8003280 |
aoqi@0 | 27 | * @summary Add lambda tests |
aoqi@0 | 28 | * Test method reference with SAM interface Comparator<T> |
aoqi@0 | 29 | * @compile MethodRef5.java |
aoqi@0 | 30 | * @run main MethodRef5 |
aoqi@0 | 31 | */ |
aoqi@0 | 32 | |
aoqi@0 | 33 | import java.util.Collections; |
aoqi@0 | 34 | import java.util.List; |
aoqi@0 | 35 | import java.util.ArrayList; |
aoqi@0 | 36 | |
aoqi@0 | 37 | public class MethodRef5 { |
aoqi@0 | 38 | |
aoqi@0 | 39 | static class Person { |
aoqi@0 | 40 | |
aoqi@0 | 41 | private String firstName; |
aoqi@0 | 42 | private String lastName; |
aoqi@0 | 43 | private int age; |
aoqi@0 | 44 | |
aoqi@0 | 45 | public Person() { } |
aoqi@0 | 46 | |
aoqi@0 | 47 | public Person(String fn, String ln, int a) { |
aoqi@0 | 48 | firstName = fn; |
aoqi@0 | 49 | lastName = ln; |
aoqi@0 | 50 | age = a; |
aoqi@0 | 51 | } |
aoqi@0 | 52 | |
aoqi@0 | 53 | public String getLastName() { |
aoqi@0 | 54 | return lastName; |
aoqi@0 | 55 | } |
aoqi@0 | 56 | |
aoqi@0 | 57 | public int getAge() { |
aoqi@0 | 58 | return age; |
aoqi@0 | 59 | } |
aoqi@0 | 60 | |
aoqi@0 | 61 | //the following 2 methods are signature-compatible with Comparator<Person>.compare(): |
aoqi@0 | 62 | public static int compareByAge(Person a, Person b) { |
aoqi@0 | 63 | return a.age - b.age; |
aoqi@0 | 64 | } |
aoqi@0 | 65 | |
aoqi@0 | 66 | public int compareByLastName(Person a, Person b) { |
aoqi@0 | 67 | return a.lastName.compareToIgnoreCase(b.lastName); |
aoqi@0 | 68 | } |
aoqi@0 | 69 | } |
aoqi@0 | 70 | |
aoqi@0 | 71 | private static void assertTrue(boolean cond) { |
aoqi@0 | 72 | if (!cond) |
aoqi@0 | 73 | throw new AssertionError(); |
aoqi@0 | 74 | } |
aoqi@0 | 75 | |
aoqi@0 | 76 | public static void main(String[] args) { |
aoqi@0 | 77 | |
aoqi@0 | 78 | List<Person> persons = new ArrayList<Person>(); |
aoqi@0 | 79 | persons.add(new Person("John", "Smith", 49)); |
aoqi@0 | 80 | persons.add(new Person("Abraham", "Lincoln", 30)); |
aoqi@0 | 81 | persons.add(new Person("George", "Washington", 29)); |
aoqi@0 | 82 | persons.add(new Person("Peter", "Derby", 50)); |
aoqi@0 | 83 | Collections.sort(persons, Person::compareByAge);//static method reference to compareByAge(Person, Person) |
aoqi@0 | 84 | String age = ""; |
aoqi@0 | 85 | for (Person p : persons) { |
aoqi@0 | 86 | age += p.getAge() + " "; |
aoqi@0 | 87 | } |
aoqi@0 | 88 | assertTrue( (age.equals("29 30 49 50 ")) ); |
aoqi@0 | 89 | Collections.sort(persons, new Person()::compareByLastName);//instance method reference to compareByLastName(Person, Person) |
aoqi@0 | 90 | String lastName = ""; |
aoqi@0 | 91 | for (Person p : persons) { |
aoqi@0 | 92 | lastName += p.getLastName() + " "; |
aoqi@0 | 93 | } |
aoqi@0 | 94 | assertTrue( lastName.equals("Derby Lincoln Smith Washington ") ); |
aoqi@0 | 95 | } |
aoqi@0 | 96 | } |