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 
32 import java.awt.image.BufferedImage;
33 import java.util.Iterator;
34 
35 import javax.imageio.ImageReader;
36 import javax.imageio.ImageWriter;
37 import javax.imageio.spi.IIORegistry;
38 import javax.imageio.spi.ImageReaderSpi;
39 import javax.imageio.spi.ImageWriterSpi;
40 
41 public class NullInputOutput {
42 
main(String[] args)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