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 }