| /* | |
| * Copyright (c) 1996, 2022, 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. Oracle designates this | |
| * particular file as subject to the "Classpath" exception as provided | |
| * by Oracle in the LICENSE file that accompanied this code. | |
| * | |
| * 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. | |
| */ | |
| /* | |
| * (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved | |
| * (C) Copyright IBM Corp. 1996, 1997 - All Rights Reserved | |
| * | |
| * The original version of this source code and documentation is copyrighted | |
| * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These | |
| * materials are provided under terms of a License Agreement between Taligent | |
| * and Sun. This technology is protected by multiple US and International | |
| * patents. This notice and attribution to Taligent may not be removed. | |
| * Taligent is a registered trademark of Taligent, Inc. | |
| * | |
| */ | |
| package java.text; | |
| import java.lang.Character; | |
| /** | |
| * Utility class for normalizing and merging patterns for collation. | |
| * This is to be used with MergeCollation for adding patterns to an | |
| * existing rule table. | |
| * @see MergeCollation | |
| * @author Mark Davis, Helena Shih | |
| */ | |
| class PatternEntry { | |
| /** | |
| * Gets the current extension, quoted | |
| */ | |
| private void appendQuotedExtension(StringBuilder toAddTo) { | |
| appendQuoted(extension,toAddTo); | |
| } | |
| /** | |
| * Gets the current chars, quoted | |
| */ | |
| private void appendQuotedChars(StringBuilder toAddTo) { | |
| appendQuoted(chars,toAddTo); | |
| } | |
| /** | |
| * WARNING this is used for searching in a Vector. | |
| * Because Vector.indexOf doesn't take a comparator, | |
| * this method is ill-defined and ignores strength. | |
| */ | |
| public boolean equals(Object obj) { | |
| if (obj == null) return false; | |
| PatternEntry other = (PatternEntry) obj; | |
| boolean result = chars.equals(other.chars); | |
| return result; | |
| } | |
| public int hashCode() { | |
| return chars.hashCode(); | |
| } | |
| /** | |
| * For debugging. | |
| */ | |
| public String toString() { | |
| StringBuilder result = new StringBuilder(); | |
| addToBuilder(result, true, false, null); | |
| return result.toString(); | |
| } | |
| /** | |
| * Gets the strength of the entry. | |
| */ | |
| final int getStrength() { | |
| return strength; | |
| } | |
| /** | |
| * Gets the expanding characters of the entry. | |
| */ | |
| final String getExtension() { | |
| return extension; | |
| } | |
| /** | |
| * Gets the core characters of the entry. | |
| */ | |
| final String getChars() { | |
| return chars; | |
| } | |
| // ===== privates ===== | |
| void addToBuilder(StringBuilder toAddTo, | |
| boolean showExtension, | |
| boolean showWhiteSpace, | |
| PatternEntry lastEntry) | |
| { | |
| if (showWhiteSpace && toAddTo.length() > 0) | |
| if (strength == Collator.PRIMARY || lastEntry != null) | |
| toAddTo.append('\n'); | |
| else | |
| toAddTo.append(' '); | |
| if (lastEntry != null) { | |
| toAddTo.append('&'); | |
| if (showWhiteSpace) | |
| toAddTo.append(' '); | |
| lastEntry.appendQuotedChars(toAddTo); | |
| appendQuotedExtension(toAddTo); | |
| if (showWhiteSpace) | |
| toAddTo.append(' '); | |
| } | |
| var c = switch (strength) { | |
| case Collator.IDENTICAL -> '='; | |
| case Collator.TERTIARY -> ','; | |
| case Collator.SECONDARY -> ';'; | |
| case Collator.PRIMARY -> '<'; | |
| case RESET -> '&'; | |
| case UNSET -> '?'; | |
| default -> throw new IllegalStateException("Unexpected value: " + strength); | |
| }; | |
| toAddTo.append(c); | |
| if (showWhiteSpace) | |
| toAddTo.append(' '); | |
| appendQuoted(chars,toAddTo); | |
| if (showExtension && !extension.isEmpty()) { | |
| toAddTo.append('/'); | |
| appendQuoted(extension,toAddTo); | |
| } | |
| } | |
| private static void appendQuoted(String chars, StringBuilder toAddTo) { | |
| boolean inQuote = false; | |
| char ch = chars.charAt(0); | |
| if (Character.isSpaceChar(ch)) { | |
| inQuote = true; | |
| toAddTo.append('\''); | |
| } else { | |
| if (PatternEntry.isSpecialChar(ch)) { | |
| inQuote = true; | |
| toAddTo.append('\''); | |
| } else { | |
| switch (ch) { | |
| case 0x0010: case '\f': case '\r': | |
| case '\t': case '\n': case '@': | |
| inQuote = true; | |
| toAddTo.append('\''); | |
| break; | |
| case '\'': | |
| inQuote = true; | |
| toAddTo.append('\''); | |
| break; | |
| default: | |
| if (inQuote) { | |
| inQuote = false; toAddTo.append('\''); | |
| } | |
| break; | |
| } | |
| } | |
| } | |
| toAddTo.append(chars); | |
| if (inQuote) | |
| toAddTo.append('\''); | |
| } | |
| //======================================================================== | |
| // Parsing a pattern into a list of PatternEntries.... | |
| //======================================================================== | |
| PatternEntry(int strength, | |
| StringBuilder chars, | |
| StringBuilder extension) | |
| { | |
| this.strength = strength; | |
| this.chars = chars.toString(); | |
| this.extension = (extension.length() > 0) ? extension.toString() | |
| : ""; | |
| } | |
| static class Parser { | |
| private String pattern; | |
| private int i; | |
| public Parser(String pattern) { | |
| this.pattern = pattern; | |
| this.i = 0; | |
| } | |
| public PatternEntry next() throws ParseException { | |
| int newStrength = UNSET; | |
| newChars.setLength(0); | |
| newExtension.setLength(0); | |
| boolean inChars = true; | |
| boolean inQuote = false; | |
| mainLoop: | |
| while (i < pattern.length()) { | |
| char ch = pattern.charAt(i); | |
| if (inQuote) { | |
| if (ch == '\'') { | |
| inQuote = false; | |
| } else { | |
| if (newChars.length() == 0) newChars.append(ch); | |
| else if (inChars) newChars.append(ch); | |
| else newExtension.append(ch); | |
| } | |
| } else switch (ch) { | |
| case '=': if (newStrength != UNSET) break mainLoop; | |
| newStrength = Collator.IDENTICAL; break; | |
| case ',': if (newStrength != UNSET) break mainLoop; | |
| newStrength = Collator.TERTIARY; break; | |
| case ';': if (newStrength != UNSET) break mainLoop; | |
| newStrength = Collator.SECONDARY; break; | |
| case '<': if (newStrength != UNSET) break mainLoop; | |
| newStrength = Collator.PRIMARY; break; | |
| case '&': if (newStrength != UNSET) break mainLoop; | |
| newStrength = RESET; break; | |
| case '\t': | |
| case '\n': | |
| case '\f': | |
| case '\r': | |
| case ' ': break; // skip whitespace TODO use Character | |
| case '/': inChars = false; break; | |
| case '\'': | |
| inQuote = true; | |
| ch = pattern.charAt(++i); | |
| if (newChars.length() == 0) newChars.append(ch); | |
| else if (inChars) newChars.append(ch); | |
| else newExtension.append(ch); | |
| break; | |
| default: | |
| if (newStrength == UNSET) { | |
| throw new ParseException | |
| ("missing char (=,;<&) : " + | |
| pattern.substring(i, | |
| (i+10 < pattern.length()) ? | |
| i+10 : pattern.length()), | |
| i); | |
| } | |
| if (PatternEntry.isSpecialChar(ch) && (inQuote == false)) | |
| throw new ParseException | |
| ("Unquoted punctuation character : " + Integer.toString(ch, 16), i); | |
| if (inChars) { | |
| newChars.append(ch); | |
| } else { | |
| newExtension.append(ch); | |
| } | |
| break; | |
| } | |
| i++; | |
| } | |
| if (newStrength == UNSET) | |
| return null; | |
| if (newChars.length() == 0) { | |
| throw new ParseException | |
| ("missing chars (=,;<&): " + | |
| pattern.substring(i, | |
| (i+10 < pattern.length()) ? | |
| i+10 : pattern.length()), | |
| i); | |
| } | |
| return new PatternEntry(newStrength, newChars, newExtension); | |
| } | |
| // We re-use these objects in order to improve performance | |
| private StringBuilder newChars = new StringBuilder(); | |
| private StringBuilder newExtension = new StringBuilder(); | |
| } | |
| static boolean isSpecialChar(char ch) { | |
| return ((ch == '\u0020') || | |
| ((ch <= '\u002F') && (ch >= '\u0022')) || | |
| ((ch <= '\u003F') && (ch >= '\u003A')) || | |
| ((ch <= '\u0060') && (ch >= '\u005B')) || | |
| ((ch <= '\u007E') && (ch >= '\u007B'))); | |
| } | |
| static final int RESET = -2; | |
| static final int UNSET = -1; | |
| int strength = UNSET; | |
| String chars = ""; | |
| String extension = ""; | |
| } |