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| 1 | +/* |
| 2 | + * Copyright (c) 2025, 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. Oracle designates this |
| 8 | + * particular file as subject to the "Classpath" exception as provided |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. |
| 10 | + * |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | + * accompanied this code). |
| 16 | + * |
| 17 | + * You should have received a copy of the GNU General Public License version |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | + * |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 22 | + * or visit www.oracle.com if you need additional information or have any |
| 23 | + * questions. |
| 24 | + */ |
| 25 | + |
| 26 | +package build.tools.generatecharacter; |
| 27 | + |
| 28 | +import java.io.IOException; |
| 29 | +import java.nio.file.Files; |
| 30 | +import java.nio.file.Paths; |
| 31 | +import java.nio.file.StandardOpenOption; |
| 32 | +import java.util.stream.Collectors; |
| 33 | +import java.util.stream.Stream; |
| 34 | + |
| 35 | +public class CaseFolding { |
| 36 | + |
| 37 | + public static void main(String[] args) throws Throwable { |
| 38 | + if (args.length != 3) { |
| 39 | + System.err.println("Usage: java CaseFolding TemplateFile CaseFolding.txt CaseFolding.java"); |
| 40 | + System.exit(1); |
| 41 | + } |
| 42 | + var templateFile = Paths.get(args[0]); |
| 43 | + var caseFoldingTxt = Paths.get(args[1]); |
| 44 | + var genSrcFile = Paths.get(args[2]); |
| 45 | + var supportedTypes = "^.*; [CTS]; .*$"; |
| 46 | + var caseFoldingEntries = Files.lines(caseFoldingTxt) |
| 47 | + .filter(line -> !line.startsWith("#") && line.matches(supportedTypes)) |
| 48 | + .map(line -> { |
| 49 | + String[] cols = line.split("; "); |
| 50 | + return new String[] {cols[0], cols[1], cols[2]}; |
| 51 | + }) |
| 52 | + .filter(cols -> { |
| 53 | + // the folding case doesn't map back to the original char. |
| 54 | + var cp1 = Integer.parseInt(cols[0], 16); |
| 55 | + var cp2 = Integer.parseInt(cols[2], 16); |
| 56 | + return Character.toUpperCase(cp2) != cp1 && Character.toLowerCase(cp2) != cp1; |
| 57 | + }) |
| 58 | + .map(cols -> String.format(" entry(0x%s, 0x%s)", cols[0], cols[2])) |
| 59 | + .collect(Collectors.joining(",\n", "", "")); |
| 60 | + |
| 61 | + // hack, hack, hack! the logic does not pick 0131. just add manually to support 'I's. |
| 62 | + // 0049; T; 0131; # LATIN CAPITAL LETTER I |
| 63 | + final String T_0x0131_0x49 = String.format(" entry(0x%04x, 0x%04x),\n", 0x0131, 0x49); |
| 64 | + |
| 65 | + // Generate .java file |
| 66 | + Files.write( |
| 67 | + genSrcFile, |
| 68 | + Files.lines(templateFile) |
| 69 | + .map(line -> line.contains("%%%Entries") ? T_0x0131_0x49 + caseFoldingEntries : line) |
| 70 | + .collect(Collectors.toList()), |
| 71 | + StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING); |
| 72 | + } |
| 73 | +} |
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