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 4835841
27 * @summary This test verifies that we will able to register new SPI after
28 * deregistration all previously registered SPIs by using
29 * deregisterAll() method
30 */
31
32 import java.io.IOException;
33 import java.util.Locale;
34
35 import javax.imageio.ImageIO;
36 import javax.imageio.ImageReader;
37 import javax.imageio.spi.IIORegistry;
38 import javax.imageio.spi.ImageReaderSpi;
39 import javax.imageio.spi.ServiceRegistry;
40 import javax.imageio.stream.ImageInputStream;
41
42 public class DeregisterAllSpiTest {
43
44 public DeregisterAllSpiTest() throws Exception {
45 ImageReaderSpi BMPSpi = new BMPImageReaderSPI();
46 IIORegistry.getDefaultInstance().registerServiceProvider(BMPSpi);
47
48 System.out.println("Reader Format Names available in the registry");
49 String formatNames[] = ImageIO.getReaderFormatNames();
50 if( formatNames == null || formatNames.length <= 0) {
51 throw new RuntimeException("No registered ImageReaders!");
52 }
53 for (int x=0; x < formatNames.length; x++) {
54 System.out.println("format "+formatNames[x]);
55 }
56
57 IIORegistry.getDefaultInstance().deregisterAll();
58
59 System.out.println("\nReader Format Names after deregistering all SPIs");
60 formatNames = ImageIO.getReaderFormatNames();
61 if(formatNames.length == 0) {
62 System.out.println("No readers available\n");
63 } else {
64 throw new RuntimeException("Some providers was not deregistered!");
65 }
66
67 IIORegistry.getDefaultInstance().registerServiceProvider(BMPSpi);
68 System.out.println("Reader Format Names after re-register of BMP Plugin");
69 formatNames = ImageIO.getReaderFormatNames();
70 if(formatNames.length == 0) {
71 throw new RuntimeException("Unable to register new SPI after deregisterAll()!");
72 }
73 }
74
75
76 public static void main(String args[]) throws Exception{
77 DeregisterAllSpiTest regis = new DeregisterAllSpiTest();
78 }
79
80
81 public static class BMPImageReaderSPI extends javax.imageio.spi.ImageReaderSpi{
82
83 private static final String vendorName = "Javasoft";
84
85 private static final String version = "2.0";
86
87 private static final String[] names = { "bmp" };
88
89 private static final String[] suffixes = { "bmp" };
90
91 private static final String[] MIMETypes = { "image/x-bmp"};
92
93 private static final String readerClassName =
94 "com.sun.imageio.plugins.png.PNGImageReader";
95
96 private static final String[] writerSpiNames = {
97 "com.sun.imageio.plugins.png.PNGImageWriterSpi"
98 };
99
100 public BMPImageReaderSPI() {
101 super(vendorName,
102 version,
103 names,
104 suffixes,
105 MIMETypes,
106 readerClassName,
107 STANDARD_INPUT_TYPE,
108 writerSpiNames,
109 false,
110 null, null,
111 null, null,
112 true,
113 "BMP Native Metadata",
114 "com.sun.imageio.plugins.png.PNGMetadataFormat",
115 null, null
116 );
117 }
118
119 public String getDescription(Locale locale) {
120 return "Standard BMP image reader";
121 }
122
123 public boolean canDecodeInput(Object input) throws IOException {
124 if (!(input instanceof ImageInputStream)) {
125 return false;
126 }
127
128 ImageInputStream stream = (ImageInputStream)input;
129 byte[] b = new byte[8];
130 stream.mark();
131 stream.readFully(b);
132 stream.reset();
133
134 return (b[0] == (byte)137 &&
135 b[1] == (byte)80 &&
136 b[2] == (byte)78 &&
137 b[3] == (byte)71 &&
138 b[4] == (byte)13 &&
139 b[5] == (byte)10 &&
140 b[6] == (byte)26 &&
141 b[7] == (byte)10);
142 }
143
144 public ImageReader createReaderInstance(Object extension) {
145 //return new PNGImageReader(this);
146 return null;
147 }
148 public void onRegistration(ServiceRegistry sr, Class<?> category) {
149 System.out.println("\nfrom OnRegistration: BMP plugin Registered\n");
150 super.onRegistration(sr, category);
151 }
152
153 public void onDeregistration(ServiceRegistry sr, Class<?> category) {
154 System.out.println("\nfrom OnDeregistration: BMP plugin De-Registered\n");
155 //super.onRegistration(sr, category);
156 }
157 }
158 }