1 /* 2 * Copyright (c) 2016, 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 8044289 27 * @summary Test verifies that when createImageInputStream() or 28 * createImageOutputStream() returns null while read or write, 29 * are we doing null check properly. 30 * @run main NullStreamCheckTest 31 */ 32 33 import java.awt.image.BufferedImage; 34 import java.io.File; 35 import java.io.IOException; 36 import java.io.InputStream; 37 import java.io.OutputStream; 38 import java.net.MalformedURLException; 39 import java.net.URL; 40 import javax.imageio.ImageIO; 41 import javax.imageio.spi.IIORegistry; 42 import javax.imageio.spi.ImageInputStreamSpi; 43 import javax.imageio.spi.ImageOutputStreamSpi; 44 45 public class NullStreamCheckTest { 46 47 // get ImageIORegistry default instance. 48 private static final IIORegistry localRegistry = IIORegistry. 49 getDefaultInstance(); 50 // stream variables needed for input and output. 51 static LocalOutputStream outputStream = new LocalOutputStream(); 52 static LocalInputStream inputStream = new LocalInputStream(); 53 54 static final int width = 50, height = 50; 55 56 // input and output BufferedImage needed while read and write. 57 static BufferedImage inputImage = new BufferedImage(width, height, 58 BufferedImage.TYPE_INT_ARGB); 59 static BufferedImage outputImage = new BufferedImage(width, height, 60 BufferedImage.TYPE_INT_ARGB); 61 62 // creates test file needed for read and write in local directory. 63 private static File createTestFile(String name) { 64 String fileName = name; 65 String sep = System.getProperty("file.separator"); 66 String dir = System.getProperty("test.src", "."); 67 String filePath = dir+sep+fileName; 68 File testFile = new File(filePath); 69 return testFile; 70 } 71 72 /* if we catch expected IOException message return 73 * false otherwise return true. 74 */ 75 private static boolean verifyOutputExceptionMessage(IOException ex) { 76 String message = ex.getMessage(); 77 return (!message.equals("Can't create an ImageOutputStream!")); 78 } 79 80 /* if we catch expected IOException message return 81 * false otherwise return true. 82 */ 83 private static boolean verifyInputExceptionMessage(IOException ex) { 84 String message = ex.getMessage(); 85 return (!message.equals("Can't create an ImageInputStream!")); 86 } 87 88 private static void verifyFileWrite() throws IOException { 89 File outputTestFile = createTestFile("outputTestFile.png"); 90 try { 91 ImageIO.write(inputImage, "png", outputTestFile); 92 } catch (IOException ex) { 93 if (verifyOutputExceptionMessage(ex)) 94 throw ex; 95 } finally { 96 outputTestFile.delete(); 97 } 98 } 99 100 private static void verifyStreamWrite() throws IOException { 101 try { 102 ImageIO.write(inputImage, "png", outputStream); 103 } catch (IOException ex) { 104 if (verifyOutputExceptionMessage(ex)) 105 throw ex; 106 } finally { 107 try { 108 outputStream.close(); 109 } catch (IOException ex) { 110 throw ex; 111 } 112 } 113 } 114 115 private static void verifyFileRead() throws IOException { 116 File inputTestFile = createTestFile("inputTestFile.png"); 117 try { 118 outputImage = ImageIO.read(inputTestFile); 119 } catch (IOException ex) { 120 if (verifyInputExceptionMessage(ex)) 121 throw ex; 122 } 123 } 124 125 private static void verifyStreamRead() throws IOException { 126 try { 127 ImageIO.read(inputStream); 128 } catch (IOException ex) { 129 if (verifyInputExceptionMessage(ex)) 130 throw ex; 131 } finally { 132 try { 133 inputStream.close(); 134 } catch (IOException ex) { 135 throw ex; 136 } 137 } 138 } 139 140 private static void verifyUrlRead() throws IOException { 141 URL url = null; 142 File inputTestFile = createTestFile("inputTestFile.png"); 143 try { 144 url = inputTestFile.toURI().toURL(); 145 } catch (MalformedURLException ex) { 146 throw ex; 147 } 148 try { 149 ImageIO.read(url); 150 } catch (IOException ex) { 151 if (verifyInputExceptionMessage(ex)) 152 throw ex; 153 } 154 } 155 156 public static void main(String[] args) throws IOException, 157 MalformedURLException { 158 159 /* deregister ImageOutputStreamSpi so that we creatImageOutputStream 160 * returns null while writing. 161 */ 162 localRegistry.deregisterAll(ImageOutputStreamSpi.class); 163 /* verify possible ImageIO.write() scenraio's for null stream output 164 * from createImageOutputStream() API in ImageIO class. 165 */ 166 verifyFileWrite(); 167 verifyStreamWrite(); 168 169 /* deregister ImageInputStreamSpi so that we creatImageInputStream 170 * returns null while reading. 171 */ 172 localRegistry.deregisterAll(ImageInputStreamSpi.class); 173 /* verify possible ImageIO.read() scenraio's for null stream output 174 * from createImageInputStream API in ImageIO class. 175 */ 176 verifyFileRead(); 177 verifyStreamRead(); 178 verifyUrlRead(); 179 } 180 181 static class LocalOutputStream extends OutputStream { 182 183 @Override 184 public void write(int i) throws IOException { 185 } 186 } 187 188 static class LocalInputStream extends InputStream { 189 190 @Override 191 public int read() throws IOException { 192 return 0; 193 } 194 } 195 }