NewTest.java revision 0:9a66ca7c79fa 
1/*
2 * Copyright 2005-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
23
24/**
25 * @test
26 * @bug     6365166
27 * @summary javac (generic) unable to resolve methods
28 * @ignore  waiting for 6365166
29 * @compile NewTest.java
30 */
31
32import java.util.*;
33
34public class NewTest<A,B> {
35    private List<A> toAdd;
36
37    public NewTest(List<A> toAdd) {
38        this.toAdd = toAdd;
39    }
40
41    private List<A> getRelated(B b) {
42        //some application logic
43        //for demo
44        return toAdd;
45    }
46
47    @SuppressWarnings("unchecked")
48    public <L extends List<? super A>,LF extends Factory<L>> L addOrCreate4(B b,L l,LF lf) {
49        if (l == null) {
50            l = lf.create();
51        }
52        ((List<? super A>)l).addAll(getRelated(b)); //to get round the compiler bug
53        return l;
54    }
55
56    public static class ListFactory<T>  implements Factory<List<T>>{
57        public List<T> create() {
58            return new ArrayList<T>();
59        }
60    }
61    public static interface Factory<T> {
62        public T create();
63    }
64
65    public static void main(String ... args) {
66        ListFactory<Number> lf = new ListFactory<Number>();
67        List<Long> longs = new ArrayList<Long>();
68        longs.add(new Long(1));
69        NewTest<Long,Number> test = new NewTest<Long,Number>(longs);
70
71        List<Number> ret4 = null;
72
73        ret4 = test.addOrCreate4(1, ret4,lf);
74
75    }
76}
77