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 */
23
24/**
25 * @test
26 * @bug 5030064
27 * @summary Basic tests for close().
28 */
29
30import java.io.Closeable;
31import java.util.Formatter;
32import java.util.FormatterClosedException;
33
34public class Close {
35
36    private static class ExpectedException extends RuntimeException {}
37
38    private static class C implements Appendable, Closeable {
39        public Appendable append(CharSequence csq) { return null; }
40        public Appendable append(char c) { return null; }
41        public Appendable append(CharSequence csq, int s, int e) {
42            return null;
43        }
44
45        public void close() {
46            throw new ExpectedException();
47        }
48    }
49
50    private static class NC implements Appendable {
51        public Appendable append(CharSequence csq) { return null; }
52        public Appendable append(char c) { return null; }
53        public Appendable append(CharSequence csq, int s, int e) {
54            return null;
55        }
56
57        // method coincidentally called close()
58        public void close() {
59            throw new RuntimeException("NC.close should not be called");
60        }
61    }
62
63    private static void test(Formatter f) {
64        if (f.out() instanceof C) {
65            // C.close() called since C implements Closeable
66            try {
67                f.close();
68                throw new RuntimeException("C.close not called");
69            } catch (ExpectedException x) {
70                System.out.println("  C.close called");
71            }
72        } else {
73            // NC.close() not called since NC does not implement Closeable
74            f.close();
75        }
76
77        // Formatter is a Closeable
78        if (!(f instanceof Closeable))
79            throw new RuntimeException("Formatter is not a Closeable");
80
81        // multiple close() does not throw a FormatterClosedException
82        f.close();
83        try {
84            f.close();
85            System.out.println("  FormatterClosedException not thrown");
86        } catch (FormatterClosedException x) {
87            throw new RuntimeException("FormatterClosedException thrown");
88        }
89    }
90
91    public static void main(String [] args) {
92        System.out.println("testing Closeable");
93        test(new Formatter(new C()));
94        System.out.println("testing non-Closeable");
95        test(new Formatter(new NC()));
96    }
97}
98