| /* |
| * Copyright (c) 1996, 2000, 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 |
| */ |
| public void appendQuotedExtension(StringBuffer toAddTo) { |
| appendQuoted(extension,toAddTo); |
| } |
| |
| /** |
| * Gets the current chars, quoted |
| */ |
| public void appendQuotedChars(StringBuffer 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() { |
| StringBuffer result = new StringBuffer(); |
| addToBuffer(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 addToBuffer(StringBuffer 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(' '); |
| } |
| switch (strength) { |
| case Collator.IDENTICAL: toAddTo.append('='); break; |
| case Collator.TERTIARY: toAddTo.append(','); break; |
| case Collator.SECONDARY: toAddTo.append(';'); break; |
| case Collator.PRIMARY: toAddTo.append('<'); break; |
| case RESET: toAddTo.append('&'); break; |
| case UNSET: toAddTo.append('?'); break; |
| } |
| if (showWhiteSpace) |
| toAddTo.append(' '); |
| appendQuoted(chars,toAddTo); |
| if (showExtension && extension.length() != 0) { |
| toAddTo.append('/'); |
| appendQuoted(extension,toAddTo); |
| } |
| } |
| |
| static void appendQuoted(String chars, StringBuffer 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, |
| StringBuffer chars, |
| StringBuffer 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 StringBuffer newChars = new StringBuffer(); |
| private StringBuffer newExtension = new StringBuffer(); |
| |
| } |
| |
| 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 = ""; |
| } |
