author | redestad |
Thu, 13 Dec 2018 15:31:05 +0100 | |
changeset 53018 | 8bf9268df0e2 |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1996, 2000, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved |
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* (C) Copyright IBM Corp. 1996, 1997 - All Rights Reserved |
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* |
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* The original version of this source code and documentation is copyrighted |
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* and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These |
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* materials are provided under terms of a License Agreement between Taligent |
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* and Sun. This technology is protected by multiple US and International |
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* patents. This notice and attribution to Taligent may not be removed. |
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* Taligent is a registered trademark of Taligent, Inc. |
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* |
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*/ |
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package java.text; |
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import java.lang.Character; |
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/** |
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* Utility class for normalizing and merging patterns for collation. |
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* This is to be used with MergeCollation for adding patterns to an |
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* existing rule table. |
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* @see MergeCollation |
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* @author Mark Davis, Helena Shih |
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*/ |
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class PatternEntry { |
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/** |
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* Gets the current extension, quoted |
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*/ |
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public void appendQuotedExtension(StringBuffer toAddTo) { |
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appendQuoted(extension,toAddTo); |
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} |
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/** |
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* Gets the current chars, quoted |
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*/ |
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public void appendQuotedChars(StringBuffer toAddTo) { |
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appendQuoted(chars,toAddTo); |
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} |
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/** |
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* WARNING this is used for searching in a Vector. |
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* Because Vector.indexOf doesn't take a comparator, |
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* this method is ill-defined and ignores strength. |
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*/ |
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public boolean equals(Object obj) { |
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if (obj == null) return false; |
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PatternEntry other = (PatternEntry) obj; |
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boolean result = chars.equals(other.chars); |
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return result; |
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} |
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public int hashCode() { |
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return chars.hashCode(); |
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} |
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/** |
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* For debugging. |
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*/ |
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public String toString() { |
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StringBuffer result = new StringBuffer(); |
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addToBuffer(result, true, false, null); |
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return result.toString(); |
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} |
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/** |
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* Gets the strength of the entry. |
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*/ |
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final int getStrength() { |
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return strength; |
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} |
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/** |
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* Gets the expanding characters of the entry. |
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*/ |
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final String getExtension() { |
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return extension; |
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} |
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/** |
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* Gets the core characters of the entry. |
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*/ |
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final String getChars() { |
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return chars; |
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} |
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// ===== privates ===== |
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void addToBuffer(StringBuffer toAddTo, |
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boolean showExtension, |
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boolean showWhiteSpace, |
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PatternEntry lastEntry) |
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{ |
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if (showWhiteSpace && toAddTo.length() > 0) |
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if (strength == Collator.PRIMARY || lastEntry != null) |
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toAddTo.append('\n'); |
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else |
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toAddTo.append(' '); |
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if (lastEntry != null) { |
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toAddTo.append('&'); |
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if (showWhiteSpace) |
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toAddTo.append(' '); |
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lastEntry.appendQuotedChars(toAddTo); |
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appendQuotedExtension(toAddTo); |
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if (showWhiteSpace) |
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toAddTo.append(' '); |
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} |
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switch (strength) { |
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case Collator.IDENTICAL: toAddTo.append('='); break; |
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case Collator.TERTIARY: toAddTo.append(','); break; |
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case Collator.SECONDARY: toAddTo.append(';'); break; |
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case Collator.PRIMARY: toAddTo.append('<'); break; |
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case RESET: toAddTo.append('&'); break; |
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case UNSET: toAddTo.append('?'); break; |
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} |
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if (showWhiteSpace) |
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toAddTo.append(' '); |
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appendQuoted(chars,toAddTo); |
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53018
8bf9268df0e2
8215281: Use String.isEmpty() when applicable in java.base
redestad
parents:
47216
diff
changeset
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if (showExtension && !extension.isEmpty()) { |
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toAddTo.append('/'); |
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appendQuoted(extension,toAddTo); |
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} |
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} |
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static void appendQuoted(String chars, StringBuffer toAddTo) { |
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boolean inQuote = false; |
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char ch = chars.charAt(0); |
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if (Character.isSpaceChar(ch)) { |
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inQuote = true; |
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toAddTo.append('\''); |
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} else { |
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if (PatternEntry.isSpecialChar(ch)) { |
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inQuote = true; |
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toAddTo.append('\''); |
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} else { |
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switch (ch) { |
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case 0x0010: case '\f': case '\r': |
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case '\t': case '\n': case '@': |
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inQuote = true; |
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toAddTo.append('\''); |
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break; |
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case '\'': |
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inQuote = true; |
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toAddTo.append('\''); |
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break; |
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default: |
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if (inQuote) { |
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inQuote = false; toAddTo.append('\''); |
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} |
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break; |
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} |
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} |
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} |
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toAddTo.append(chars); |
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if (inQuote) |
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toAddTo.append('\''); |
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} |
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//======================================================================== |
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// Parsing a pattern into a list of PatternEntries.... |
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//======================================================================== |
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PatternEntry(int strength, |
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StringBuffer chars, |
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StringBuffer extension) |
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{ |
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this.strength = strength; |
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this.chars = chars.toString(); |
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this.extension = (extension.length() > 0) ? extension.toString() |
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: ""; |
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} |
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static class Parser { |
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private String pattern; |
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private int i; |
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public Parser(String pattern) { |
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this.pattern = pattern; |
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this.i = 0; |
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} |
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public PatternEntry next() throws ParseException { |
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int newStrength = UNSET; |
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newChars.setLength(0); |
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newExtension.setLength(0); |
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boolean inChars = true; |
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boolean inQuote = false; |
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mainLoop: |
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while (i < pattern.length()) { |
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char ch = pattern.charAt(i); |
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if (inQuote) { |
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if (ch == '\'') { |
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inQuote = false; |
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} else { |
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if (newChars.length() == 0) newChars.append(ch); |
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else if (inChars) newChars.append(ch); |
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else newExtension.append(ch); |
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} |
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} else switch (ch) { |
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case '=': if (newStrength != UNSET) break mainLoop; |
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newStrength = Collator.IDENTICAL; break; |
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case ',': if (newStrength != UNSET) break mainLoop; |
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newStrength = Collator.TERTIARY; break; |
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case ';': if (newStrength != UNSET) break mainLoop; |
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newStrength = Collator.SECONDARY; break; |
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case '<': if (newStrength != UNSET) break mainLoop; |
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newStrength = Collator.PRIMARY; break; |
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case '&': if (newStrength != UNSET) break mainLoop; |
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newStrength = RESET; break; |
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case '\t': |
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case '\n': |
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case '\f': |
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case '\r': |
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case ' ': break; // skip whitespace TODO use Character |
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case '/': inChars = false; break; |
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case '\'': |
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inQuote = true; |
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ch = pattern.charAt(++i); |
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if (newChars.length() == 0) newChars.append(ch); |
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else if (inChars) newChars.append(ch); |
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else newExtension.append(ch); |
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break; |
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default: |
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if (newStrength == UNSET) { |
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throw new ParseException |
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("missing char (=,;<&) : " + |
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pattern.substring(i, |
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(i+10 < pattern.length()) ? |
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i+10 : pattern.length()), |
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i); |
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} |
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if (PatternEntry.isSpecialChar(ch) && (inQuote == false)) |
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throw new ParseException |
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("Unquoted punctuation character : " + Integer.toString(ch, 16), i); |
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if (inChars) { |
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newChars.append(ch); |
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} else { |
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newExtension.append(ch); |
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} |
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break; |
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} |
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i++; |
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} |
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if (newStrength == UNSET) |
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return null; |
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if (newChars.length() == 0) { |
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throw new ParseException |
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("missing chars (=,;<&): " + |
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pattern.substring(i, |
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(i+10 < pattern.length()) ? |
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i+10 : pattern.length()), |
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i); |
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} |
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return new PatternEntry(newStrength, newChars, newExtension); |
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} |
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// We re-use these objects in order to improve performance |
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private StringBuffer newChars = new StringBuffer(); |
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private StringBuffer newExtension = new StringBuffer(); |
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} |
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static boolean isSpecialChar(char ch) { |
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return ((ch == '\u0020') || |
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((ch <= '\u002F') && (ch >= '\u0022')) || |
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((ch <= '\u003F') && (ch >= '\u003A')) || |
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((ch <= '\u0060') && (ch >= '\u005B')) || |
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((ch <= '\u007E') && (ch >= '\u007B'))); |
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} |
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static final int RESET = -2; |
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static final int UNSET = -1; |
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int strength = UNSET; |
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String chars = ""; |
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String extension = ""; |
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} |