1/* 2 * Copyright (c) 2008, 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/* @test 25 @bug 5066863 5066867 5066874 5066879 5066884 5066887 5065777 6730652 26 @summary canEncode() false iff encode() throws CharacterCodingException 27 @run main/timeout=1200 FindCanEncodeBugs 28 @author Martin Buchholz 29 */ 30 31import java.util.*; 32import java.nio.charset.*; 33import java.nio.*; 34 35public class FindCanEncodeBugs { 36 static boolean encodable1(CharsetEncoder enc, char c) { 37 enc.reset(); 38 return enc.canEncode(c); 39 } 40 41 static boolean encodable2(CharsetEncoder enc, char c) { 42 enc.reset(); 43 try { enc.encode(CharBuffer.wrap(new char[]{c})); return true; } 44 catch (CharacterCodingException e) { return false; } 45 } 46 47 public static void main(String[] args) throws Exception { 48 int failures = 0; 49 50 for (Map.Entry<String,Charset> e 51 : Charset.availableCharsets().entrySet()) { 52 String csn = e.getKey(); 53 Charset cs = e.getValue(); 54 55 if (! cs.canEncode() || csn.matches("x-COMPOUND_TEXT")) 56 continue; 57 58 //System.out.println(csn); 59 60 CharsetEncoder enc = cs.newEncoder(); 61 62 for (int i = Character.MIN_VALUE; i <= Character.MAX_VALUE; i++) { 63 boolean encodable1 = encodable1(enc, (char)i); 64 boolean encodable2 = encodable2(enc, (char)i); 65 if (encodable1 != encodable2) { 66 int start = i; 67 int end = i; 68 for (int j = i; 69 j <= '\uffff' && 70 encodable1(enc, (char)j) == encodable1 && 71 encodable2(enc, (char)j) == encodable2; 72 j++) 73 end = j; 74 System.out.printf("charset=%-18s canEncode=%-5b ", 75 csn, encodable1); 76 if (start == end) 77 System.out.printf("\'\\u%04x\'%n", start); 78 else 79 System.out.printf("\'\\u%04x\' - \'\\u%04x\'%n", 80 start, end); 81 i = end; 82 failures++; 83 } 84 } 85 } 86 87 if (failures > 0) 88 throw new Exception(failures + " failures"); 89 } 90} 91