1 /* 2 * Copyright (c) 2010, 2015, 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 4777124 6920545 6911753 8073924 27 * @summary Verify that all Charset subclasses are available through the API 28 */ 29 30 import java.net.URI; 31 import java.nio.charset.Charset; 32 import java.nio.file.FileSystem; 33 import java.nio.file.FileSystems; 34 import java.nio.file.Files; 35 import java.nio.file.Path; 36 import java.util.HashSet; 37 import java.util.Set; 38 import java.util.stream.Collectors; 39 import java.util.stream.Stream; 40 41 public class NIOCharsetAvailabilityTest { 42 43 public static void main(String[] args) throws Exception { 44 45 // build the set of all Charset subclasses in the 46 // two known charset implementation packages 47 FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/")); 48 Set<Class> charsets = 49 Stream.concat(Files.walk(fs.getPath("/modules/java.base/sun/nio/cs/")), 50 Files.walk(fs.getPath("/modules/jdk.charsets/sun/nio/cs/ext/"))) 51 .map( p -> p.subpath(2, p.getNameCount()).toString()) 52 .filter( s -> s.indexOf("$") == -1 && s.endsWith(".class")) 53 .map( s -> { 54 try { 55 return Class.forName(s.substring(0, s.length() - 6) 56 .replace('/', '.')); 57 } catch (Exception x) { 58 throw new RuntimeException(x); 59 } 60 }) 61 .filter( clz -> { 62 Class superclazz = clz.getSuperclass(); 63 while (superclazz != null && !superclazz.equals(Object.class)) { 64 if (superclazz.equals(Charset.class)) { 65 return true; 66 } else { 67 superclazz = superclazz.getSuperclass(); 68 } 69 } 70 return false; 71 }) 72 .collect(Collectors.toCollection(HashSet::new)); 73 // remove the charsets that the API says are available 74 Charset.availableCharsets() 75 .values() 76 .stream() 77 .forEach(cs -> { 78 if (!charsets.contains(cs.getClass())) { 79 System.out.println(" missing -> " + cs.getClass()); 80 } 81 charsets.remove(cs.getClass()); 82 }); 83 84 // remove the known pseudo-charsets that serve only to implement 85 // other charsets, but shouldn't be known to the public 86 charsets.remove(Class.forName("sun.nio.cs.Unicode")); 87 charsets.remove(Class.forName("sun.nio.cs.ext.ISO2022")); 88 charsets.remove(Class.forName("sun.nio.cs.ext.ISO2022_CN_GB")); 89 charsets.remove(Class.forName("sun.nio.cs.ext.ISO2022_CN_CNS")); 90 charsets.remove(Class.forName("sun.nio.cs.ext.JIS_X_0208_MS932")); 91 charsets.remove(Class.forName("sun.nio.cs.ext.JIS_X_0212_MS5022X")); 92 charsets.remove(Class.forName("sun.nio.cs.ext.JIS_X_0208_MS5022X")); 93 try { 94 charsets.remove(Class.forName("sun.nio.cs.ext.JIS_X_0208_Solaris")); 95 charsets.remove(Class.forName("sun.nio.cs.ext.JIS_X_0212_Solaris")); 96 } catch (ClassNotFoundException x) { 97 // these two might be moved into stdcs 98 charsets.remove(Class.forName("sun.nio.cs.JIS_X_0208_Solaris")); 99 charsets.remove(Class.forName("sun.nio.cs.JIS_X_0212_Solaris")); 100 } 101 // report the charsets that are implemented but not available 102 if (charsets.size() > 0) { 103 charsets.stream() 104 .forEach( clz -> 105 System.out.println("Unused Charset subclass: " + clz)); 106 throw new RuntimeException(); 107 } 108 } 109 }