/*
* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/*
* @test
* @bug 5044157
* @summary type system loophole in wildcard substitution
* @author Gilad Bracha
*
* @compile/fail CaptureInSubtype.java
*/
import java.util.List;
import java.util.ArrayList;
public class CaptureInSubtype {
static class SuperOfFlaw<S>{
S s;
S get() { return s;}
void put(S a) { s = a;}
SuperOfFlaw(S a) { s = a;}
}
static class Flaw<T> extends SuperOfFlaw<List<T>> {
List<T> fetch(){return s;}
Flaw(T t){super(new ArrayList<T>()); s.add(t);}
}
static class SuperOfShowFlaw {
SuperOfFlaw<List<?>> m(){return null;}
}
public static class ShowFlaw extends SuperOfShowFlaw {
static Flaw<Number> fn = new Flaw<Number>(new Integer(3));
Flaw<?> m(){return fn;}
}
public static void main(String[] args) {
SuperOfShowFlaw sosf = new ShowFlaw();
SuperOfFlaw<List<?>> sof = sosf.m();
List<String> ls = new ArrayList<String>();
ls.add("Smalltalk rules!");
sof.put(ls);
Number n = ShowFlaw.fn.get().get(0);
}
}