1/*
2 * Copyright (c) 2003, 2017, 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 4892682 4892698
27 * @summary Tests that the appropriate IllegalStateException is thrown if
28 *          ImageReader.read() or ImageWriter.write() is called without having
29 *          first set the input/output stream
30 */
31
32import java.awt.image.BufferedImage;
33import java.util.Iterator;
34
35import javax.imageio.ImageReader;
36import javax.imageio.ImageWriter;
37import javax.imageio.spi.IIORegistry;
38import javax.imageio.spi.ImageReaderSpi;
39import javax.imageio.spi.ImageWriterSpi;
40
41public class NullInputOutput {
42
43    public static void main(String[] args) throws Exception {
44        IIORegistry registry = IIORegistry.getDefaultInstance();
45
46        // test ImageReader.read() for all available ImageReaders
47        Iterator readerspis = registry.getServiceProviders(ImageReaderSpi.class,
48                                                           false);
49        while (readerspis.hasNext()) {
50            ImageReaderSpi readerspi = (ImageReaderSpi)readerspis.next();
51            ImageReader reader = readerspi.createReaderInstance();
52            try {
53                reader.read(0);
54            } catch (IllegalStateException ise) {
55                // caught exception, everything's okay
56            }
57        }
58
59        // test ImageWriter.write() for all available ImageWriters
60        BufferedImage bi = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB);
61        Iterator writerspis = registry.getServiceProviders(ImageWriterSpi.class,
62                                                           false);
63        while (writerspis.hasNext()) {
64            ImageWriterSpi writerspi = (ImageWriterSpi)writerspis.next();
65            ImageWriter writer = writerspi.createWriterInstance();
66            try {
67                writer.write(bi);
68            } catch (IllegalStateException ise) {
69                // caught exception, everything's okay
70            }
71        }
72    }
73}
74