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| 1 | +/* | |
| 2 | + * Copyright (c) 1996, 2000, 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 | +/* | |
| 27 | + * (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved | |
| 28 | + * (C) Copyright IBM Corp. 1996, 1997 - All Rights Reserved | |
| 29 | + * | |
| 30 | + * The original version of this source code and documentation is copyrighted | |
| 31 | + * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These | |
| 32 | + * materials are provided under terms of a License Agreement between Taligent | |
| 33 | + * and Sun. This technology is protected by multiple US and International | |
| 34 | + * patents. This notice and attribution to Taligent may not be removed. | |
| 35 | + * Taligent is a registered trademark of Taligent, Inc. | |
| 36 | + * | |
| 37 | + */ | |
| 38 | + | |
| 39 | +package java.text; | |
| 40 | + | |
| 41 | +import java.lang.Character; | |
| 42 | + | |
| 43 | +/** | |
| 44 | + * Utility class for normalizing and merging patterns for collation. | |
| 45 | + * This is to be used with MergeCollation for adding patterns to an | |
| 46 | + * existing rule table. | |
| 47 | + * @see MergeCollation | |
| 48 | + * @author Mark Davis, Helena Shih | |
| 49 | + */ | |
| 50 | + | |
| 51 | +class PatternEntry { | |
| 52 | + /** | |
| 53 | + * Gets the current extension, quoted | |
| 54 | + */ | |
| 55 | + public void appendQuotedExtension(StringBuffer toAddTo) { | |
| 56 | + appendQuoted(extension,toAddTo); | |
| 57 | + } | |
| 58 | + | |
| 59 | + /** | |
| 60 | + * Gets the current chars, quoted | |
| 61 | + */ | |
| 62 | + public void appendQuotedChars(StringBuffer toAddTo) { | |
| 63 | + appendQuoted(chars,toAddTo); | |
| 64 | + } | |
| 65 | + | |
| 66 | + /** | |
| 67 | + * WARNING this is used for searching in a Vector. | |
| 68 | + * Because Vector.indexOf doesn't take a comparator, | |
| 69 | + * this method is ill-defined and ignores strength. | |
| 70 | + */ | |
| 71 | + public boolean equals(Object obj) { | |
| 72 | + if (obj == null) return false; | |
| 73 | + PatternEntry other = (PatternEntry) obj; | |
| 74 | + boolean result = chars.equals(other.chars); | |
| 75 | + return result; | |
| 76 | + } | |
| 77 | + | |
| 78 | + public int hashCode() { | |
| 79 | + return chars.hashCode(); | |
| 80 | + } | |
| 81 | + | |
| 82 | + /** | |
| 83 | + * For debugging. | |
| 84 | + */ | |
| 85 | + public String toString() { | |
| 86 | + StringBuffer result = new StringBuffer(); | |
| 87 | + addToBuffer(result, true, false, null); | |
| 88 | + return result.toString(); | |
| 89 | + } | |
| 90 | + | |
| 91 | + /** | |
| 92 | + * Gets the strength of the entry. | |
| 93 | + */ | |
| 94 | + final int getStrength() { | |
| 95 | + return strength; | |
| 96 | + } | |
| 97 | + | |
| 98 | + /** | |
| 99 | + * Gets the expanding characters of the entry. | |
| 100 | + */ | |
| 101 | + final String getExtension() { | |
| 102 | + return extension; | |
| 103 | + } | |
| 104 | + | |
| 105 | + /** | |
| 106 | + * Gets the core characters of the entry. | |
| 107 | + */ | |
| 108 | + final String getChars() { | |
| 109 | + return chars; | |
| 110 | + } | |
| 111 | + | |
| 112 | + // ===== privates ===== | |
| 113 | + | |
| 114 | + void addToBuffer(StringBuffer toAddTo, | |
| 115 | + boolean showExtension, | |
| 116 | + boolean showWhiteSpace, | |
| 117 | + PatternEntry lastEntry) | |
| 118 | + { | |
| 119 | + if (showWhiteSpace && toAddTo.length() > 0) | |
| 120 | + if (strength == Collator.PRIMARY || lastEntry != null) | |
| 121 | + toAddTo.append('\n'); | |
| 122 | + else | |
| 123 | + toAddTo.append(' '); | |
| 124 | + if (lastEntry != null) { | |
| 125 | + toAddTo.append('&'); | |
| 126 | + if (showWhiteSpace) | |
| 127 | + toAddTo.append(' '); | |
| 128 | + lastEntry.appendQuotedChars(toAddTo); | |
| 129 | + appendQuotedExtension(toAddTo); | |
| 130 | + if (showWhiteSpace) | |
| 131 | + toAddTo.append(' '); | |
| 132 | + } | |
| 133 | + switch (strength) { | |
| 134 | + case Collator.IDENTICAL: toAddTo.append('='); break; | |
| 135 | + case Collator.TERTIARY: toAddTo.append(','); break; | |
| 136 | + case Collator.SECONDARY: toAddTo.append(';'); break; | |
| 137 | + case Collator.PRIMARY: toAddTo.append('<'); break; | |
| 138 | + case RESET: toAddTo.append('&'); break; | |
| 139 | + case UNSET: toAddTo.append('?'); break; | |
| 140 | + } | |
| 141 | + if (showWhiteSpace) | |
| 142 | + toAddTo.append(' '); | |
| 143 | + appendQuoted(chars,toAddTo); | |
| 144 | + if (showExtension && extension.length() != 0) { | |
| 145 | + toAddTo.append('/'); | |
| 146 | + appendQuoted(extension,toAddTo); | |
| 147 | + } | |
| 148 | + } | |
| 149 | + | |
| 150 | + static void appendQuoted(String chars, StringBuffer toAddTo) { | |
| 151 | + boolean inQuote = false; | |
| 152 | + char ch = chars.charAt(0); | |
| 153 | + if (Character.isSpaceChar(ch)) { | |
| 154 | + inQuote = true; | |
| 155 | + toAddTo.append('\''); | |
| 156 | + } else { | |
| 157 | + if (PatternEntry.isSpecialChar(ch)) { | |
| 158 | + inQuote = true; | |
| 159 | + toAddTo.append('\''); | |
| 160 | + } else { | |
| 161 | + switch (ch) { | |
| 162 | + case 0x0010: case '\f': case '\r': | |
| 163 | + case '\t': case '\n': case '@': | |
| 164 | + inQuote = true; | |
| 165 | + toAddTo.append('\''); | |
| 166 | + break; | |
| 167 | + case '\'': | |
| 168 | + inQuote = true; | |
| 169 | + toAddTo.append('\''); | |
| 170 | + break; | |
| 171 | + default: | |
| 172 | + if (inQuote) { | |
| 173 | + inQuote = false; toAddTo.append('\''); | |
| 174 | + } | |
| 175 | + break; | |
| 176 | + } | |
| 177 | + } | |
| 178 | + } | |
| 179 | + toAddTo.append(chars); | |
| 180 | + if (inQuote) | |
| 181 | + toAddTo.append('\''); | |
| 182 | + } | |
| 183 | + | |
| 184 | + //======================================================================== | |
| 185 | + // Parsing a pattern into a list of PatternEntries.... | |
| 186 | + //======================================================================== | |
| 187 | + | |
| 188 | + PatternEntry(int strength, | |
| 189 | + StringBuffer chars, | |
| 190 | + StringBuffer extension) | |
| 191 | + { | |
| 192 | + this.strength = strength; | |
| 193 | + this.chars = chars.toString(); | |
| 194 | + this.extension = (extension.length() > 0) ? extension.toString() | |
| 195 | + : ""; | |
| 196 | + } | |
| 197 | + | |
| 198 | + static class Parser { | |
| 199 | + private String pattern; | |
| 200 | + private int i; | |
| 201 | + | |
| 202 | + public Parser(String pattern) { | |
| 203 | + this.pattern = pattern; | |
| 204 | + this.i = 0; | |
| 205 | + } | |
| 206 | + | |
| 207 | + public PatternEntry next() throws ParseException { | |
| 208 | + int newStrength = UNSET; | |
| 209 | + | |
| 210 | + newChars.setLength(0); | |
| 211 | + newExtension.setLength(0); | |
| 212 | + | |
| 213 | + boolean inChars = true; | |
| 214 | + boolean inQuote = false; | |
| 215 | + mainLoop: | |
| 216 | + while (i < pattern.length()) { | |
| 217 | + char ch = pattern.charAt(i); | |
| 218 | + if (inQuote) { | |
| 219 | + if (ch == '\'') { | |
| 220 | + inQuote = false; | |
| 221 | + } else { | |
| 222 | + if (newChars.length() == 0) newChars.append(ch); | |
| 223 | + else if (inChars) newChars.append(ch); | |
| 224 | + else newExtension.append(ch); | |
| 225 | + } | |
| 226 | + } else switch (ch) { | |
| 227 | + case '=': if (newStrength != UNSET) break mainLoop; | |
| 228 | + newStrength = Collator.IDENTICAL; break; | |
| 229 | + case ',': if (newStrength != UNSET) break mainLoop; | |
| 230 | + newStrength = Collator.TERTIARY; break; | |
| 231 | + case ';': if (newStrength != UNSET) break mainLoop; | |
| 232 | + newStrength = Collator.SECONDARY; break; | |
| 233 | + case '<': if (newStrength != UNSET) break mainLoop; | |
| 234 | + newStrength = Collator.PRIMARY; break; | |
| 235 | + case '&': if (newStrength != UNSET) break mainLoop; | |
| 236 | + newStrength = RESET; break; | |
| 237 | + case '\t': | |
| 238 | + case '\n': | |
| 239 | + case '\f': | |
| 240 | + case '\r': | |
| 241 | + case ' ': break; // skip whitespace TODO use Character | |
| 242 | + case '/': inChars = false; break; | |
| 243 | + case '\'': | |
| 244 | + inQuote = true; | |
| 245 | + ch = pattern.charAt(++i); | |
| 246 | + if (newChars.length() == 0) newChars.append(ch); | |
| 247 | + else if (inChars) newChars.append(ch); | |
| 248 | + else newExtension.append(ch); | |
| 249 | + break; | |
| 250 | + default: | |
| 251 | + if (newStrength == UNSET) { | |
| 252 | + throw new ParseException | |
| 253 | + ("missing char (=,;<&) : " + | |
| 254 | + pattern.substring(i, | |
| 255 | + (i+10 < pattern.length()) ? | |
| 256 | + i+10 : pattern.length()), | |
| 257 | + i); | |
| 258 | + } | |
| 259 | + if (PatternEntry.isSpecialChar(ch) && (inQuote == false)) | |
| 260 | + throw new ParseException | |
| 261 | + ("Unquoted punctuation character : " + Integer.toString(ch, 16), i); | |
| 262 | + if (inChars) { | |
| 263 | + newChars.append(ch); | |
| 264 | + } else { | |
| 265 | + newExtension.append(ch); | |
| 266 | + } | |
| 267 | + break; | |
| 268 | + } | |
| 269 | + i++; | |
| 270 | + } | |
| 271 | + if (newStrength == UNSET) | |
| 272 | + return null; | |
| 273 | + if (newChars.length() == 0) { | |
| 274 | + throw new ParseException | |
| 275 | + ("missing chars (=,;<&): " + | |
| 276 | + pattern.substring(i, | |
| 277 | + (i+10 < pattern.length()) ? | |
| 278 | + i+10 : pattern.length()), | |
| 279 | + i); | |
| 280 | + } | |
| 281 | + | |
| 282 | + return new PatternEntry(newStrength, newChars, newExtension); | |
| 283 | + } | |
| 284 | + | |
| 285 | + // We re-use these objects in order to improve performance | |
| 286 | + private StringBuffer newChars = new StringBuffer(); | |
| 287 | + private StringBuffer newExtension = new StringBuffer(); | |
| 288 | + | |
| 289 | + } | |
| 290 | + | |
| 291 | + static boolean isSpecialChar(char ch) { | |
| 292 | + return ((ch == '\u0020') || | |
| 293 | + ((ch <= '\u002F') && (ch >= '\u0022')) || | |
| 294 | + ((ch <= '\u003F') && (ch >= '\u003A')) || | |
| 295 | + ((ch <= '\u0060') && (ch >= '\u005B')) || | |
| 296 | + ((ch <= '\u007E') && (ch >= '\u007B'))); | |
| 297 | + } | |
| 298 | + | |
| 299 | + | |
| 300 | + static final int RESET = -2; | |
| 301 | + static final int UNSET = -1; | |
| 302 | + | |
| 303 | + int strength = UNSET; | |
| 304 | + String chars = ""; | |
| 305 | + String extension = ""; | |
| 306 | +} | |