| /* |
| * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4836432 8037743 |
| * @summary This test attempts to register two instances of one ImageReaderSPI. |
| * Expected behavior is that only one instance of ImageReaderSPI will |
| * be registered. |
| */ |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.Locale; |
| |
| import javax.imageio.ImageReader; |
| import javax.imageio.spi.IIORegistry; |
| import javax.imageio.spi.ServiceRegistry; |
| import javax.imageio.stream.ImageInputStream; |
| |
| public class RegisterPluginTwiceTest { |
| |
| public RegisterPluginTwiceTest() throws Exception { |
| BMPImageReaderSPI BMPSpi = new BMPImageReaderSPI(); |
| BMPImageReaderSPI BMPSpi1 = new BMPImageReaderSPI(); |
| |
| IIORegistry regis = IIORegistry.getDefaultInstance(); |
| boolean res1 |
| = regis.registerServiceProvider(BMPSpi, |
| javax.imageio.spi.ImageReaderSpi.class); |
| boolean res2 |
| = regis.registerServiceProvider(BMPSpi1, |
| javax.imageio.spi.ImageReaderSpi.class); |
| |
| if(!res1 || res2) { |
| throw new RuntimeException("Bad returned values for registerServiceProvider"); |
| } |
| Iterator it = regis.getServiceProviders(Class.forName("javax.imageio.spi.ImageReaderSpi"), true); |
| int count = 0; |
| while (it.hasNext()) { |
| Object o = it.next(); |
| if(o instanceof BMPImageReaderSPI) { |
| count++; |
| System.out.println("Found next BMPImageReaderSPI, count = " +count); |
| } |
| } |
| if(count > 1) { |
| throw new RuntimeException("Too many instances of the BMPImageReaderSPI was registered!"); |
| } |
| } |
| |
| public static void main(String args[]) throws Exception{ |
| RegisterPluginTwiceTest fnio = new RegisterPluginTwiceTest(); |
| } |
| |
| |
| /** |
| Not a perfect implementation of SPI. This is just a dummy implementation |
| which denotes some arbitrary reader class. The intention is to check how this |
| is getting registered in the registry. Hence some of the values in this class |
| may be inappropriate.. |
| */ |
| public static class BMPImageReaderSPI extends javax.imageio.spi.ImageReaderSpi{ |
| |
| private static final String vendorName = "Javasoft"; |
| |
| private static final String version = "2.0"; |
| |
| private static final String[] names = { "bmp" }; |
| |
| private static final String[] suffixes = { "bmp" }; |
| |
| private static final String[] MIMETypes = { "image/x-bmp"}; |
| |
| private static final String readerClassName = |
| "com.sun.imageio.plugins.png.PNGImageReader"; |
| |
| private static final String[] writerSpiNames = { |
| "com.sun.imageio.plugins.png.PNGImageWriterSpi" |
| }; |
| |
| public BMPImageReaderSPI() { |
| super(vendorName, |
| version, |
| names, |
| suffixes, |
| MIMETypes, |
| readerClassName, |
| STANDARD_INPUT_TYPE, |
| writerSpiNames, |
| false, |
| null, null, |
| null, null, |
| true, |
| "BMP Native Metadata", |
| "com.sun.imageio.plugins.png.PNGMetadataFormat", |
| null, null |
| ); |
| } |
| |
| public String getDescription(Locale locale) { |
| return "Standard BMP image reader"; |
| } |
| |
| public boolean canDecodeInput(Object input) throws IOException { |
| if (!(input instanceof ImageInputStream)) { |
| return false; |
| } |
| |
| ImageInputStream stream = (ImageInputStream)input; |
| byte[] b = new byte[8]; |
| stream.mark(); |
| stream.readFully(b); |
| stream.reset(); |
| |
| return (b[0] == (byte)137 && |
| b[1] == (byte)80 && |
| b[2] == (byte)78 && |
| b[3] == (byte)71 && |
| b[4] == (byte)13 && |
| b[5] == (byte)10 && |
| b[6] == (byte)26 && |
| b[7] == (byte)10); |
| } |
| |
| public ImageReader createReaderInstance(Object extension) { |
| //return new PNGImageReader(this); |
| return null; |
| } |
| public void onRegistration(ServiceRegistry sr, Class<?> category) { |
| //System.out.println("Registered "+category); |
| super.onRegistration(sr, category); |
| } |
| |
| public void onDeregistration(ServiceRegistry sr, Class<?> category) { |
| //System.out.println("De-Registered "+category); |
| //super.onRegistration(sr, category); |
| } |
| } |
| } |