Mon, 12 Jul 2010 19:43:19 -0700
Merge
1 /*
2 * Copyright (c) 2004, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
24 /*
25 * @test
26 * @bug 5044157
27 * @summary type system loophole in wildcard substitution
28 * @author Gilad Bracha
29 *
30 * @compile/fail CaptureInSubtype.java
31 */
33 import java.util.List;
34 import java.util.ArrayList;
36 public class CaptureInSubtype {
38 static class SuperOfFlaw<S>{
39 S s;
40 S get() { return s;}
41 void put(S a) { s = a;}
43 SuperOfFlaw(S a) { s = a;}
44 }
46 static class Flaw<T> extends SuperOfFlaw<List<T>> {
47 List<T> fetch(){return s;}
49 Flaw(T t){super(new ArrayList<T>()); s.add(t);}
50 }
52 static class SuperOfShowFlaw {
54 SuperOfFlaw<List<?>> m(){return null;}
55 }
58 public static class ShowFlaw extends SuperOfShowFlaw {
59 static Flaw<Number> fn = new Flaw<Number>(new Integer(3));
61 Flaw<?> m(){return fn;}
62 }
64 public static void main(String[] args) {
65 SuperOfShowFlaw sosf = new ShowFlaw();
66 SuperOfFlaw<List<?>> sof = sosf.m();
67 List<String> ls = new ArrayList<String>();
68 ls.add("Smalltalk rules!");
69 sof.put(ls);
70 Number n = ShowFlaw.fn.get().get(0);
71 }
73 }