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 4892609
  27  * @summary Tests that the appropriate IllegalStateException is thrown if
  28  *          ImageReader.getNumImages() is called with a null source or if
  29  *          allowSearch is specified at the same time that seekForwardOnly is
  30  *          true
  31  */
  32 
  33 import java.io.ByteArrayInputStream;
  34 import java.util.Iterator;
  35 
  36 import javax.imageio.ImageIO;
  37 import javax.imageio.ImageReader;
  38 import javax.imageio.spi.IIORegistry;
  39 import javax.imageio.spi.ImageReaderSpi;
  40 import javax.imageio.stream.ImageInputStream;
  41 
  42 public class GetNumImages {
  43 
  44     public static void main(String[] args) throws Exception {
  45         IIORegistry registry = IIORegistry.getDefaultInstance();
  46 
  47         // test ImageReader.getNumImages() for all available ImageReaders,
  48         // with no source set
  49         Iterator readerspis = registry.getServiceProviders(ImageReaderSpi.class,
  50                                                            false);
  51         while (readerspis.hasNext()) {
  52             boolean caughtEx = false;
  53             ImageReaderSpi readerspi = (ImageReaderSpi)readerspis.next();
  54             ImageReader reader = readerspi.createReaderInstance();
  55             try {
  56                 reader.getNumImages(false);
  57             } catch (IllegalStateException ise) {
  58                 // caught exception, everything's okay
  59                 caughtEx = true;
  60             }
  61 
  62             if (!caughtEx) {
  63                 throw new RuntimeException("Test failed: exception was not " +
  64                                            "thrown for null input: " +
  65                                            reader);
  66             }
  67         }
  68 
  69         // test ImageReader.getNumImages() for all available ImageReaders,
  70         // with source set, seekForwardOnly and allowSearch both true
  71         readerspis = registry.getServiceProviders(ImageReaderSpi.class,
  72                                                   false);
  73         while (readerspis.hasNext()) {
  74             boolean caughtEx = false;
  75             ImageReaderSpi readerspi = (ImageReaderSpi)readerspis.next();
  76             ImageReader reader = readerspi.createReaderInstance();
  77             byte[] barr = new byte[100];
  78             ByteArrayInputStream bais = new ByteArrayInputStream(barr);
  79             ImageInputStream iis = ImageIO.createImageInputStream(bais);
  80             try {
  81                 reader.setInput(iis, true);
  82                 reader.getNumImages(true);
  83             } catch (IllegalStateException ise) {
  84                 // caught exception, everything's okay
  85                 caughtEx = true;
  86             }
  87 
  88             if (!caughtEx) {
  89                 throw new RuntimeException("Test failed: exception was not " +
  90                                            "thrown when allowSearch and " +
  91                                            "seekForwardOnly are both true: " +
  92                                            reader);
  93             }
  94         }
  95     }
  96 }