/*
 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
 */
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.impl.xpath.regex;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamField;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Vector;

This class represents a node in parse tree.
@xerces.internal
@LastModified: May 2018
/** * This class represents a node in parse tree. * * @xerces.internal * @LastModified: May 2018 */
class Token implements java.io.Serializable { private static final long serialVersionUID = 8484976002585487481L; static final boolean COUNTTOKENS = true; static int tokens = 0; static final int CHAR = 0; // Literal char static final int DOT = 11; // . static final int CONCAT = 1; // XY static final int UNION = 2; // X|Y|Z static final int CLOSURE = 3; // X* static final int RANGE = 4; // [a-zA-Z] etc. static final int NRANGE = 5; // [^a-zA-Z] etc. static final int PAREN = 6; // (X) or (?:X) static final int EMPTY = 7; // static final int ANCHOR = 8; // ^ $ \b \B \< \> \A \Z \z static final int NONGREEDYCLOSURE = 9; // *? +? static final int STRING = 10; // strings static final int BACKREFERENCE = 12; // back references static final int LOOKAHEAD = 20; // (?=...) static final int NEGATIVELOOKAHEAD = 21; // (?!...) static final int LOOKBEHIND = 22; // (?<=...) static final int NEGATIVELOOKBEHIND = 23; // (?<!...) static final int INDEPENDENT = 24; // (?>...) static final int MODIFIERGROUP = 25; // (?ims-ims:...) static final int CONDITION = 26; // (?(...)yes|no) static final int UTF16_MAX = 0x10ffff; final int type; static Token token_dot; static Token token_0to9; static Token token_wordchars; static Token token_not_0to9; static Token token_not_wordchars; static Token token_spaces; static Token token_not_spaces; static Token token_empty; static Token token_linebeginning; static Token token_linebeginning2; static Token token_lineend; static Token token_stringbeginning; static Token token_stringend; static Token token_stringend2; static Token token_wordedge; static Token token_not_wordedge; static Token token_wordbeginning; static Token token_wordend; static { Token.token_empty = new Token(Token.EMPTY); Token.token_linebeginning = Token.createAnchor('^'); Token.token_linebeginning2 = Token.createAnchor('@'); Token.token_lineend = Token.createAnchor('$'); Token.token_stringbeginning = Token.createAnchor('A'); Token.token_stringend = Token.createAnchor('z'); Token.token_stringend2 = Token.createAnchor('Z'); Token.token_wordedge = Token.createAnchor('b'); Token.token_not_wordedge = Token.createAnchor('B'); Token.token_wordbeginning = Token.createAnchor('<'); Token.token_wordend = Token.createAnchor('>'); Token.token_dot = new Token(Token.DOT); Token.token_0to9 = Token.createRange(); Token.token_0to9.addRange('0', '9'); Token.token_wordchars = Token.createRange(); Token.token_wordchars.addRange('0', '9'); Token.token_wordchars.addRange('A', 'Z'); Token.token_wordchars.addRange('_', '_'); Token.token_wordchars.addRange('a', 'z'); Token.token_spaces = Token.createRange(); Token.token_spaces.addRange('\t', '\t'); Token.token_spaces.addRange('\n', '\n'); Token.token_spaces.addRange('\f', '\f'); Token.token_spaces.addRange('\r', '\r'); Token.token_spaces.addRange(' ', ' '); Token.token_not_0to9 = Token.complementRanges(Token.token_0to9); Token.token_not_wordchars = Token.complementRanges(Token.token_wordchars); Token.token_not_spaces = Token.complementRanges(Token.token_spaces); } static Token.ParenToken createLook(int type, Token child) { if (COUNTTOKENS) Token.tokens ++; return new Token.ParenToken(type, child, 0); } static Token.ParenToken createParen(Token child, int pnumber) { if (COUNTTOKENS) Token.tokens ++; return new Token.ParenToken(Token.PAREN, child, pnumber); } static Token.ClosureToken createClosure(Token tok) { if (COUNTTOKENS) Token.tokens ++; return new Token.ClosureToken(Token.CLOSURE, tok); } static Token.ClosureToken createNGClosure(Token tok) { if (COUNTTOKENS) Token.tokens ++; return new Token.ClosureToken(Token.NONGREEDYCLOSURE, tok); } static Token.ConcatToken createConcat(Token tok1, Token tok2) { if (COUNTTOKENS) Token.tokens ++; return new Token.ConcatToken(tok1, tok2); } static Token.UnionToken createConcat() { if (COUNTTOKENS) Token.tokens ++; return new Token.UnionToken(Token.CONCAT); // *** It is not a bug. } static Token.UnionToken createUnion() { if (COUNTTOKENS) Token.tokens ++; return new Token.UnionToken(Token.UNION); } static Token createEmpty() { return Token.token_empty; } static RangeToken createRange() { if (COUNTTOKENS) Token.tokens ++; return new RangeToken(Token.RANGE); } static RangeToken createNRange() { if (COUNTTOKENS) Token.tokens ++; return new RangeToken(Token.NRANGE); } static Token.CharToken createChar(int ch) { if (COUNTTOKENS) Token.tokens ++; return new Token.CharToken(Token.CHAR, ch); } static private Token.CharToken createAnchor(int ch) { if (COUNTTOKENS) Token.tokens ++; return new Token.CharToken(Token.ANCHOR, ch); } static Token.StringToken createBackReference(int refno) { if (COUNTTOKENS) Token.tokens ++; return new Token.StringToken(Token.BACKREFERENCE, null, refno); } static Token.StringToken createString(String str) { if (COUNTTOKENS) Token.tokens ++; return new Token.StringToken(Token.STRING, str, 0); } static Token.ModifierToken createModifierGroup(Token child, int add, int mask) { if (COUNTTOKENS) Token.tokens ++; return new Token.ModifierToken(child, add, mask); } static Token.ConditionToken createCondition(int refno, Token condition, Token yespat, Token nopat) { if (COUNTTOKENS) Token.tokens ++; return new Token.ConditionToken(refno, condition, yespat, nopat); } protected Token(int type) { this.type = type; }
A number of children.
/** * A number of children. */
int size() { return 0; } Token getChild(int index) { return null; } void addChild(Token tok) { throw new RuntimeException("Not supported."); } // for RANGE or NRANGE protected void addRange(int start, int end) { throw new RuntimeException("Not supported."); } protected void sortRanges() { throw new RuntimeException("Not supported."); } protected void compactRanges() { throw new RuntimeException("Not supported."); } protected void mergeRanges(Token tok) { throw new RuntimeException("Not supported."); } protected void subtractRanges(Token tok) { throw new RuntimeException("Not supported."); } protected void intersectRanges(Token tok) { throw new RuntimeException("Not supported."); } static Token complementRanges(Token tok) { return RangeToken.complementRanges(tok); } void setMin(int min) { // for CLOSURE } void setMax(int max) { // for CLOSURE } int getMin() { // for CLOSURE return -1; } int getMax() { // for CLOSURE return -1; } int getReferenceNumber() { // for STRING return 0; } String getString() { // for STRING return null; } int getParenNumber() { return 0; } int getChar() { return -1; } public String toString() { return this.toString(0); } public String toString(int options) { return this.type == Token.DOT ? "." : ""; }
How many characters are needed?
/** * How many characters are needed? */
final int getMinLength() { switch (this.type) { case CONCAT: int sum = 0; for (int i = 0; i < this.size(); i ++) sum += this.getChild(i).getMinLength(); return sum; case CONDITION: case UNION: if (this.size() == 0) return 0; int ret = this.getChild(0).getMinLength(); for (int i = 1; i < this.size(); i ++) { int min = this.getChild(i).getMinLength(); if (min < ret) ret = min; } return ret; case CLOSURE: case NONGREEDYCLOSURE: if (this.getMin() >= 0) return this.getMin() * this.getChild(0).getMinLength(); return 0; case EMPTY: case ANCHOR: return 0; case DOT: case CHAR: case RANGE: case NRANGE: return 1; case INDEPENDENT: case PAREN: case MODIFIERGROUP: return this.getChild(0).getMinLength(); case BACKREFERENCE: return 0; // ******* case STRING: return this.getString().length(); case LOOKAHEAD: case NEGATIVELOOKAHEAD: case LOOKBEHIND: case NEGATIVELOOKBEHIND: return 0; // ***** Really? default: throw new RuntimeException("Token#getMinLength(): Invalid Type: "+this.type); } } final int getMaxLength() { switch (this.type) { case CONCAT: int sum = 0; for (int i = 0; i < this.size(); i ++) { int d = this.getChild(i).getMaxLength(); if (d < 0) return -1; sum += d; } return sum; case CONDITION: case UNION: if (this.size() == 0) return 0; int ret = this.getChild(0).getMaxLength(); for (int i = 1; ret >= 0 && i < this.size(); i ++) { int max = this.getChild(i).getMaxLength(); if (max < 0) { // infinity ret = -1; break; } if (max > ret) ret = max; } return ret; case CLOSURE: case NONGREEDYCLOSURE: if (this.getMax() >= 0) // When this.child.getMaxLength() < 0, // this returns minus value return this.getMax() * this.getChild(0).getMaxLength(); return -1; case EMPTY: case ANCHOR: return 0; case CHAR: return 1; case DOT: case RANGE: case NRANGE: return 2; case INDEPENDENT: case PAREN: case MODIFIERGROUP: return this.getChild(0).getMaxLength(); case BACKREFERENCE: return -1; // ****** case STRING: return this.getString().length(); case LOOKAHEAD: case NEGATIVELOOKAHEAD: case LOOKBEHIND: case NEGATIVELOOKBEHIND: return 0; // ***** Really? default: throw new RuntimeException("Token#getMaxLength(): Invalid Type: "+this.type); } } static final int FC_CONTINUE = 0; static final int FC_TERMINAL = 1; static final int FC_ANY = 2; private static final boolean isSet(int options, int flag) { return (options & flag) == flag; } final int analyzeFirstCharacter(RangeToken result, int options) { switch (this.type) { case CONCAT: int ret = FC_CONTINUE; for (int i = 0; i < this.size(); i ++) if ((ret = this.getChild(i).analyzeFirstCharacter(result, options)) != FC_CONTINUE) break; return ret; case UNION: if (this.size() == 0) return FC_CONTINUE; /* * a|b|c -> FC_TERMINAL * a|.|c -> FC_ANY * a|b| -> FC_CONTINUE */ int ret2 = FC_CONTINUE; boolean hasEmpty = false; for (int i = 0; i < this.size(); i ++) { ret2 = this.getChild(i).analyzeFirstCharacter(result, options); if (ret2 == FC_ANY) break; else if (ret2 == FC_CONTINUE) hasEmpty = true; } return hasEmpty ? FC_CONTINUE : ret2; case CONDITION: int ret3 = this.getChild(0).analyzeFirstCharacter(result, options); if (this.size() == 1) return FC_CONTINUE; if (ret3 == FC_ANY) return ret3; int ret4 = this.getChild(1).analyzeFirstCharacter(result, options); if (ret4 == FC_ANY) return ret4; return ret3 == FC_CONTINUE || ret4 == FC_CONTINUE ? FC_CONTINUE : FC_TERMINAL; case CLOSURE: case NONGREEDYCLOSURE: this.getChild(0).analyzeFirstCharacter(result, options); return FC_CONTINUE; case EMPTY: case ANCHOR: return FC_CONTINUE; case CHAR: int ch = this.getChar(); result.addRange(ch, ch); if (ch < 0x10000 && isSet(options, RegularExpression.IGNORE_CASE)) { ch = Character.toUpperCase((char)ch); result.addRange(ch, ch); ch = Character.toLowerCase((char)ch); result.addRange(ch, ch); } return FC_TERMINAL; case DOT: return FC_ANY; case RANGE: result.mergeRanges(this); return FC_TERMINAL; case NRANGE: // **** result.mergeRanges(Token.complementRanges(this)); return FC_TERMINAL; case INDEPENDENT: case PAREN: return this.getChild(0).analyzeFirstCharacter(result, options); case MODIFIERGROUP: options |= ((ModifierToken)this).getOptions(); options &= ~((ModifierToken)this).getOptionsMask(); return this.getChild(0).analyzeFirstCharacter(result, options); case BACKREFERENCE: result.addRange(0, UTF16_MAX); // **** We can not optimize. return FC_ANY; case STRING: int cha = this.getString().charAt(0); int ch2; if (REUtil.isHighSurrogate(cha) && this.getString().length() >= 2 && REUtil.isLowSurrogate((ch2 = this.getString().charAt(1)))) cha = REUtil.composeFromSurrogates(cha, ch2); result.addRange(cha, cha); if (cha < 0x10000 && isSet(options, RegularExpression.IGNORE_CASE)) { cha = Character.toUpperCase((char)cha); result.addRange(cha, cha); cha = Character.toLowerCase((char)cha); result.addRange(cha, cha); } return FC_TERMINAL; case LOOKAHEAD: case NEGATIVELOOKAHEAD: case LOOKBEHIND: case NEGATIVELOOKBEHIND: return FC_CONTINUE; default: throw new RuntimeException("Token#analyzeHeadCharacter(): Invalid Type: "+this.type); } } private final boolean isShorterThan(Token tok) { if (tok == null) return false; /* int mylength; if (this.type == STRING) mylength = this.getString().length(); else if (this.type == CHAR) mylength = this.getChar() >= 0x10000 ? 2 : 1; else throw new RuntimeException("Internal Error: Illegal type: "+this.type); int otherlength; if (tok.type == STRING) otherlength = tok.getString().length(); else if (tok.type == CHAR) otherlength = tok.getChar() >= 0x10000 ? 2 : 1; else throw new RuntimeException("Internal Error: Illegal type: "+tok.type); */ int mylength; if (this.type == STRING) mylength = this.getString().length(); else throw new RuntimeException("Internal Error: Illegal type: "+this.type); int otherlength; if (tok.type == STRING) otherlength = tok.getString().length(); else throw new RuntimeException("Internal Error: Illegal type: "+tok.type); return mylength < otherlength; } static class FixedStringContainer { Token token = null; int options = 0; FixedStringContainer() { } } final void findFixedString(FixedStringContainer container, int options) { switch (this.type) { case CONCAT: Token prevToken = null; int prevOptions = 0; for (int i = 0; i < this.size(); i ++) { this.getChild(i).findFixedString(container, options); if (prevToken == null || prevToken.isShorterThan(container.token)) { prevToken = container.token; prevOptions = container.options; } } container.token = prevToken; container.options = prevOptions; return; case UNION: case CLOSURE: case NONGREEDYCLOSURE: case EMPTY: case ANCHOR: case RANGE: case DOT: case NRANGE: case BACKREFERENCE: case LOOKAHEAD: case NEGATIVELOOKAHEAD: case LOOKBEHIND: case NEGATIVELOOKBEHIND: case CONDITION: container.token = null; return; case CHAR: // Ignore CHAR tokens. container.token = null; // ** return; // ** case STRING: container.token = this; container.options = options; return; case INDEPENDENT: case PAREN: this.getChild(0).findFixedString(container, options); return; case MODIFIERGROUP: options |= ((ModifierToken)this).getOptions(); options &= ~((ModifierToken)this).getOptionsMask(); this.getChild(0).findFixedString(container, options); return; default: throw new RuntimeException("Token#findFixedString(): Invalid Type: "+this.type); } } boolean match(int ch) { throw new RuntimeException("NFAArrow#match(): Internal error: "+this.type); } // ------------------------------------------------------ private static volatile Map<String, Token> categories = null; private static volatile Map<String, Token> categories2 = null; private static final Object lock = new Object(); private static final String[] categoryNames = { "Cn", "Lu", "Ll", "Lt", "Lm", "Lo", "Mn", "Me", "Mc", "Nd", "Nl", "No", "Zs", "Zl", "Zp", "Cc", "Cf", null, "Co", "Cs", "Pd", "Ps", "Pe", "Pc", "Po", "Sm", "Sc", "Sk", "So", // 28 "Pi", "Pf", // 29, 30 "L", "M", "N", "Z", "C", "P", "S", // 31-37 }; // Schema Rec. {Datatypes} - Punctuation static final int CHAR_INIT_QUOTE = 29; // Pi - initial quote static final int CHAR_FINAL_QUOTE = 30; // Pf - final quote static final int CHAR_LETTER = 31; static final int CHAR_MARK = 32; static final int CHAR_NUMBER = 33; static final int CHAR_SEPARATOR = 34; static final int CHAR_OTHER = 35; static final int CHAR_PUNCTUATION = 36; static final int CHAR_SYMBOL = 37; //blockNames in UNICODE 3.1 that supported by XML Schema REC private static final String[] blockNames = { /*0000..007F;*/ "Basic Latin", /*0080..00FF;*/ "Latin-1 Supplement", /*0100..017F;*/ "Latin Extended-A", /*0180..024F;*/ "Latin Extended-B", /*0250..02AF;*/ "IPA Extensions", /*02B0..02FF;*/ "Spacing Modifier Letters", /*0300..036F;*/ "Combining Diacritical Marks", /*0370..03FF;*/ "Greek", /*0400..04FF;*/ "Cyrillic", /*0530..058F;*/ "Armenian", /*0590..05FF;*/ "Hebrew", /*0600..06FF;*/ "Arabic", /*0700..074F;*/ "Syriac", /*0780..07BF;*/ "Thaana", /*0900..097F;*/ "Devanagari", /*0980..09FF;*/ "Bengali", /*0A00..0A7F;*/ "Gurmukhi", /*0A80..0AFF;*/ "Gujarati", /*0B00..0B7F;*/ "Oriya", /*0B80..0BFF;*/ "Tamil", /*0C00..0C7F;*/ "Telugu", /*0C80..0CFF;*/ "Kannada", /*0D00..0D7F;*/ "Malayalam", /*0D80..0DFF;*/ "Sinhala", /*0E00..0E7F;*/ "Thai", /*0E80..0EFF;*/ "Lao", /*0F00..0FFF;*/ "Tibetan", /*1000..109F;*/ "Myanmar", /*10A0..10FF;*/ "Georgian", /*1100..11FF;*/ "Hangul Jamo", /*1200..137F;*/ "Ethiopic", /*13A0..13FF;*/ "Cherokee", /*1400..167F;*/ "Unified Canadian Aboriginal Syllabics", /*1680..169F;*/ "Ogham", /*16A0..16FF;*/ "Runic", /*1780..17FF;*/ "Khmer", /*1800..18AF;*/ "Mongolian", /*1E00..1EFF;*/ "Latin Extended Additional", /*1F00..1FFF;*/ "Greek Extended", /*2000..206F;*/ "General Punctuation", /*2070..209F;*/ "Superscripts and Subscripts", /*20A0..20CF;*/ "Currency Symbols", /*20D0..20FF;*/ "Combining Marks for Symbols", /*2100..214F;*/ "Letterlike Symbols", /*2150..218F;*/ "Number Forms", /*2190..21FF;*/ "Arrows", /*2200..22FF;*/ "Mathematical Operators", /*2300..23FF;*/ "Miscellaneous Technical", /*2400..243F;*/ "Control Pictures", /*2440..245F;*/ "Optical Character Recognition", /*2460..24FF;*/ "Enclosed Alphanumerics", /*2500..257F;*/ "Box Drawing", /*2580..259F;*/ "Block Elements", /*25A0..25FF;*/ "Geometric Shapes", /*2600..26FF;*/ "Miscellaneous Symbols", /*2700..27BF;*/ "Dingbats", /*2800..28FF;*/ "Braille Patterns", /*2E80..2EFF;*/ "CJK Radicals Supplement", /*2F00..2FDF;*/ "Kangxi Radicals", /*2FF0..2FFF;*/ "Ideographic Description Characters", /*3000..303F;*/ "CJK Symbols and Punctuation", /*3040..309F;*/ "Hiragana", /*30A0..30FF;*/ "Katakana", /*3100..312F;*/ "Bopomofo", /*3130..318F;*/ "Hangul Compatibility Jamo", /*3190..319F;*/ "Kanbun", /*31A0..31BF;*/ "Bopomofo Extended", /*3200..32FF;*/ "Enclosed CJK Letters and Months", /*3300..33FF;*/ "CJK Compatibility", /*3400..4DB5;*/ "CJK Unified Ideographs Extension A", /*4E00..9FFF;*/ "CJK Unified Ideographs", /*A000..A48F;*/ "Yi Syllables", /*A490..A4CF;*/ "Yi Radicals", /*AC00..D7A3;*/ "Hangul Syllables", /*E000..F8FF;*/ "Private Use", /*F900..FAFF;*/ "CJK Compatibility Ideographs", /*FB00..FB4F;*/ "Alphabetic Presentation Forms", /*FB50..FDFF;*/ "Arabic Presentation Forms-A", /*FE20..FE2F;*/ "Combining Half Marks", /*FE30..FE4F;*/ "CJK Compatibility Forms", /*FE50..FE6F;*/ "Small Form Variants", /*FE70..FEFE;*/ "Arabic Presentation Forms-B", /*FEFF..FEFF;*/ "Specials", /*FF00..FFEF;*/ "Halfwidth and Fullwidth Forms", //missing Specials add manually /*10300..1032F;*/ "Old Italic", // 84 /*10330..1034F;*/ "Gothic", /*10400..1044F;*/ "Deseret", /*1D000..1D0FF;*/ "Byzantine Musical Symbols", /*1D100..1D1FF;*/ "Musical Symbols", /*1D400..1D7FF;*/ "Mathematical Alphanumeric Symbols", /*20000..2A6D6;*/ "CJK Unified Ideographs Extension B", /*2F800..2FA1F;*/ "CJK Compatibility Ideographs Supplement", /*E0000..E007F;*/ "Tags", //missing 2 private use add manually }; //ADD THOSE MANUALLY //F0000..FFFFD; "Private Use", //100000..10FFFD; "Private Use" //FFF0..FFFD; "Specials", static final String blockRanges = "\u0000\u007F\u0080\u00FF\u0100\u017F\u0180\u024F\u0250\u02AF\u02B0\u02FF\u0300\u036F" +"\u0370\u03FF\u0400\u04FF\u0530\u058F\u0590\u05FF\u0600\u06FF\u0700\u074F\u0780\u07BF" +"\u0900\u097F\u0980\u09FF\u0A00\u0A7F\u0A80\u0AFF\u0B00\u0B7F\u0B80\u0BFF\u0C00\u0C7F\u0C80\u0CFF" +"\u0D00\u0D7F\u0D80\u0DFF\u0E00\u0E7F\u0E80\u0EFF\u0F00\u0FFF\u1000\u109F\u10A0\u10FF\u1100\u11FF" +"\u1200\u137F\u13A0\u13FF\u1400\u167F\u1680\u169F\u16A0\u16FF\u1780\u17FF\u1800\u18AF\u1E00\u1EFF" +"\u1F00\u1FFF\u2000\u206F\u2070\u209F\u20A0\u20CF\u20D0\u20FF\u2100\u214F\u2150\u218F\u2190\u21FF\u2200\u22FF" +"\u2300\u23FF\u2400\u243F\u2440\u245F\u2460\u24FF\u2500\u257F\u2580\u259F\u25A0\u25FF\u2600\u26FF\u2700\u27BF" +"\u2800\u28FF\u2E80\u2EFF\u2F00\u2FDF\u2FF0\u2FFF\u3000\u303F\u3040\u309F\u30A0\u30FF\u3100\u312F\u3130\u318F" +"\u3190\u319F\u31A0\u31BF\u3200\u32FF\u3300\u33FF\u3400\u4DB5\u4E00\u9FFF\uA000\uA48F\uA490\uA4CF" +"\uAC00\uD7A3\uE000\uF8FF\uF900\uFAFF\uFB00\uFB4F\uFB50\uFDFF" +"\uFE20\uFE2F\uFE30\uFE4F\uFE50\uFE6F\uFE70\uFEFE\uFEFF\uFEFF\uFF00\uFFEF"; static final int[] nonBMPBlockRanges = { 0x10300, 0x1032F, // 84 0x10330, 0x1034F, 0x10400, 0x1044F, 0x1D000, 0x1D0FF, 0x1D100, 0x1D1FF, 0x1D400, 0x1D7FF, 0x20000, 0x2A6D6, 0x2F800, 0x2FA1F, 0xE0000, 0xE007F }; private static final int NONBMP_BLOCK_START = 84; static protected RangeToken getRange(String name, boolean positive) { // use local variable for better performance Map<String, Token> localCat = Token.categories; if (localCat == null) { synchronized (lock) { localCat = Token.categories; if (localCat == null) { Map<String, Token> tmpCat = new HashMap<>(); Map<String, Token> tmpCat2 = new HashMap<>(); Token[] ranges = new Token[Token.categoryNames.length]; for (int i = 0; i < ranges.length; i ++) { ranges[i] = Token.createRange(); } int type; for (int i = 0; i < 0x10000; i ++) { type = Character.getType((char)i); if (type == Character.START_PUNCTUATION || type == Character.END_PUNCTUATION) { //build table of Pi values if (i == 0x00AB || i == 0x2018 || i == 0x201B || i == 0x201C || i == 0x201F || i == 0x2039) { type = CHAR_INIT_QUOTE; } //build table of Pf values if (i == 0x00BB || i == 0x2019 || i == 0x201D || i == 0x203A ) { type = CHAR_FINAL_QUOTE; } } ranges[type].addRange(i, i); switch (type) { case Character.UPPERCASE_LETTER: case Character.LOWERCASE_LETTER: case Character.TITLECASE_LETTER: case Character.MODIFIER_LETTER: case Character.OTHER_LETTER: type = CHAR_LETTER; break; case Character.NON_SPACING_MARK: case Character.COMBINING_SPACING_MARK: case Character.ENCLOSING_MARK: type = CHAR_MARK; break; case Character.DECIMAL_DIGIT_NUMBER: case Character.LETTER_NUMBER: case Character.OTHER_NUMBER: type = CHAR_NUMBER; break; case Character.SPACE_SEPARATOR: case Character.LINE_SEPARATOR: case Character.PARAGRAPH_SEPARATOR: type = CHAR_SEPARATOR; break; case Character.CONTROL: case Character.FORMAT: case Character.SURROGATE: case Character.PRIVATE_USE: case Character.UNASSIGNED: type = CHAR_OTHER; break; case Character.CONNECTOR_PUNCTUATION: case Character.DASH_PUNCTUATION: case Character.START_PUNCTUATION: case Character.END_PUNCTUATION: case CHAR_INIT_QUOTE: case CHAR_FINAL_QUOTE: case Character.OTHER_PUNCTUATION: type = CHAR_PUNCTUATION; break; case Character.MATH_SYMBOL: case Character.CURRENCY_SYMBOL: case Character.MODIFIER_SYMBOL: case Character.OTHER_SYMBOL: type = CHAR_SYMBOL; break; default: throw new RuntimeException("org.apache.xerces.utils.regex.Token#getRange(): Unknown Unicode category: "+type); } ranges[type].addRange(i, i); } // for all characters ranges[Character.UNASSIGNED].addRange(0x10000, Token.UTF16_MAX); for (int i = 0; i < ranges.length; i ++) { if (Token.categoryNames[i] != null) { if (i == Character.UNASSIGNED) { // Unassigned ranges[i].addRange(0x10000, Token.UTF16_MAX); } tmpCat.put(Token.categoryNames[i], ranges[i]); tmpCat2.put(Token.categoryNames[i], Token.complementRanges(ranges[i])); } } //REVISIT: do we really need to support block names as in Unicode 3.1 // or we can just create all the names in IsBLOCKNAME format (XML Schema REC)? // StringBuilder buffer = new StringBuilder(50); for (int i = 0; i < Token.blockNames.length; i ++) { Token r1 = Token.createRange(); int location; if (i < NONBMP_BLOCK_START) { location = i*2; int rstart = Token.blockRanges.charAt(location); int rend = Token.blockRanges.charAt(location+1); //DEBUGING //System.out.println(n+" " +Integer.toHexString(rstart) // +"-"+ Integer.toHexString(rend)); r1.addRange(rstart, rend); } else { location = (i - NONBMP_BLOCK_START) * 2; r1.addRange(Token.nonBMPBlockRanges[location], Token.nonBMPBlockRanges[location + 1]); } String n = Token.blockNames[i]; if (n.equals("Specials")) r1.addRange(0xfff0, 0xfffd); if (n.equals("Private Use")) { r1.addRange(0xF0000,0xFFFFD); r1.addRange(0x100000,0x10FFFD); } tmpCat.put(n, r1); tmpCat2.put(n, Token.complementRanges(r1)); buffer.setLength(0); buffer.append("Is"); if (n.indexOf(' ') >= 0) { for (int ci = 0; ci < n.length(); ci ++) if (n.charAt(ci) != ' ') buffer.append(n.charAt(ci)); } else { buffer.append(n); } Token.setAlias(tmpCat, tmpCat2, buffer.toString(), n, true); } // TR#18 1.2 Token.setAlias(tmpCat, tmpCat2, "ASSIGNED", "Cn", false); Token.setAlias(tmpCat, tmpCat2, "UNASSIGNED", "Cn", true); Token all = Token.createRange(); all.addRange(0, Token.UTF16_MAX); tmpCat.put("ALL", all); tmpCat2.put("ALL", Token.complementRanges(all)); Token.registerNonXS("ASSIGNED"); Token.registerNonXS("UNASSIGNED"); Token.registerNonXS("ALL"); Token isalpha = Token.createRange(); isalpha.mergeRanges(ranges[Character.UPPERCASE_LETTER]); // Lu isalpha.mergeRanges(ranges[Character.LOWERCASE_LETTER]); // Ll isalpha.mergeRanges(ranges[Character.OTHER_LETTER]); // Lo tmpCat.put("IsAlpha", isalpha); tmpCat2.put("IsAlpha", Token.complementRanges(isalpha)); Token.registerNonXS("IsAlpha"); Token isalnum = Token.createRange(); isalnum.mergeRanges(isalpha); // Lu Ll Lo isalnum.mergeRanges(ranges[Character.DECIMAL_DIGIT_NUMBER]); // Nd tmpCat.put("IsAlnum", isalnum); tmpCat2.put("IsAlnum", Token.complementRanges(isalnum)); Token.registerNonXS("IsAlnum"); Token isspace = Token.createRange(); isspace.mergeRanges(Token.token_spaces); isspace.mergeRanges(ranges[CHAR_SEPARATOR]); // Z tmpCat.put("IsSpace", isspace); tmpCat2.put("IsSpace", Token.complementRanges(isspace)); Token.registerNonXS("IsSpace"); Token isword = Token.createRange(); isword.mergeRanges(isalnum); // Lu Ll Lo Nd isword.addRange('_', '_'); tmpCat.put("IsWord", isword); tmpCat2.put("IsWord", Token.complementRanges(isword)); Token.registerNonXS("IsWord"); Token isascii = Token.createRange(); isascii.addRange(0, 127); tmpCat.put("IsASCII", isascii); tmpCat2.put("IsASCII", Token.complementRanges(isascii)); Token.registerNonXS("IsASCII"); Token isnotgraph = Token.createRange(); isnotgraph.mergeRanges(ranges[CHAR_OTHER]); isnotgraph.addRange(' ', ' '); tmpCat.put("IsGraph", Token.complementRanges(isnotgraph)); tmpCat2.put("IsGraph", isnotgraph); Token.registerNonXS("IsGraph"); Token isxdigit = Token.createRange(); isxdigit.addRange('0', '9'); isxdigit.addRange('A', 'F'); isxdigit.addRange('a', 'f'); tmpCat.put("IsXDigit", Token.complementRanges(isxdigit)); tmpCat2.put("IsXDigit", isxdigit); Token.registerNonXS("IsXDigit"); Token.setAlias(tmpCat, tmpCat2, "IsDigit", "Nd", true); Token.setAlias(tmpCat, tmpCat2, "IsUpper", "Lu", true); Token.setAlias(tmpCat, tmpCat2, "IsLower", "Ll", true); Token.setAlias(tmpCat, tmpCat2, "IsCntrl", "C", true); Token.setAlias(tmpCat, tmpCat2, "IsPrint", "C", false); Token.setAlias(tmpCat, tmpCat2, "IsPunct", "P", true); Token.registerNonXS("IsDigit"); Token.registerNonXS("IsUpper"); Token.registerNonXS("IsLower"); Token.registerNonXS("IsCntrl"); Token.registerNonXS("IsPrint"); Token.registerNonXS("IsPunct"); Token.setAlias(tmpCat, tmpCat2, "alpha", "IsAlpha", true); Token.setAlias(tmpCat, tmpCat2, "alnum", "IsAlnum", true); Token.setAlias(tmpCat, tmpCat2, "ascii", "IsASCII", true); Token.setAlias(tmpCat, tmpCat2, "cntrl", "IsCntrl", true); Token.setAlias(tmpCat, tmpCat2, "digit", "IsDigit", true); Token.setAlias(tmpCat, tmpCat2, "graph", "IsGraph", true); Token.setAlias(tmpCat, tmpCat2, "lower", "IsLower", true); Token.setAlias(tmpCat, tmpCat2, "print", "IsPrint", true); Token.setAlias(tmpCat, tmpCat2, "punct", "IsPunct", true); Token.setAlias(tmpCat, tmpCat2, "space", "IsSpace", true); Token.setAlias(tmpCat, tmpCat2, "upper", "IsUpper", true); Token.setAlias(tmpCat, tmpCat2, "word", "IsWord", true); // Perl extension Token.setAlias(tmpCat, tmpCat2, "xdigit", "IsXDigit", true); Token.registerNonXS("alpha"); Token.registerNonXS("alnum"); Token.registerNonXS("ascii"); Token.registerNonXS("cntrl"); Token.registerNonXS("digit"); Token.registerNonXS("graph"); Token.registerNonXS("lower"); Token.registerNonXS("print"); Token.registerNonXS("punct"); Token.registerNonXS("space"); Token.registerNonXS("upper"); Token.registerNonXS("word"); Token.registerNonXS("xdigit"); Token.categories = localCat = Collections.unmodifiableMap(tmpCat); Token.categories2 = Collections.unmodifiableMap(tmpCat2); } // localCat == null } // synchronized } // if null return positive ? (RangeToken)localCat.get(name) : (RangeToken)Token.categories2.get(name); } static protected RangeToken getRange(String name, boolean positive, boolean xs) { RangeToken range = Token.getRange(name, positive); if (xs && range != null && Token.isRegisterNonXS(name)) range = null; return range; } static final Set<String> nonxs = Collections.synchronizedSet(new HashSet<>());
This method is called by only getRange(). So this method need not MT-safe.
/** * This method is called by only getRange(). * So this method need not MT-safe. */
static protected void registerNonXS(String name) { Token.nonxs.add(name); } static protected boolean isRegisterNonXS(String name) { return Token.nonxs.contains(name); } private static void setAlias(Map<String, Token> tmpCat, Map<String, Token> tmpCat2, String newName, String name, boolean positive) { Token t1 = tmpCat.get(name); Token t2 = tmpCat2.get(name); if (positive) { tmpCat.put(newName, t1); tmpCat2.put(newName, t2); } else { tmpCat2.put(newName, t1); tmpCat.put(newName, t2); } } // ------------------------------------------------------ static final String viramaString = "\u094D"// ;DEVANAGARI SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u09CD"//;BENGALI SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u0A4D"//;GURMUKHI SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u0ACD"//;GUJARATI SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u0B4D"//;ORIYA SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u0BCD"//;TAMIL SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u0C4D"//;TELUGU SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u0CCD"//;KANNADA SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u0D4D"//;MALAYALAM SIGN VIRAMA;Mn;9;ON;;;;;N;;;;; +"\u0E3A"//;THAI CHARACTER PHINTHU;Mn;9;ON;;;;;N;THAI VOWEL SIGN PHINTHU;;;; +"\u0F84";//;TIBETAN MARK HALANTA;Mn;9;ON;;;;;N;TIBETAN VIRAMA;;;; static private Token token_grapheme = null; static synchronized Token getGraphemePattern() { if (Token.token_grapheme != null) return Token.token_grapheme; Token base_char = Token.createRange(); // [{ASSIGNED}]-[{M},{C}] base_char.mergeRanges(Token.getRange("ASSIGNED", true)); base_char.subtractRanges(Token.getRange("M", true)); base_char.subtractRanges(Token.getRange("C", true)); Token virama = Token.createRange(); for (int i = 0; i < Token.viramaString.length(); i++) { virama.addRange(i, i); } Token combiner_wo_virama = Token.createRange(); combiner_wo_virama.mergeRanges(Token.getRange("M", true)); combiner_wo_virama.addRange(0x1160, 0x11ff); // hangul_medial and hangul_final combiner_wo_virama.addRange(0xff9e, 0xff9f); // extras Token left = Token.createUnion(); // base_char? left.addChild(base_char); left.addChild(Token.token_empty); Token foo = Token.createUnion(); foo.addChild(Token.createConcat(virama, Token.getRange("L", true))); foo.addChild(combiner_wo_virama); foo = Token.createClosure(foo); foo = Token.createConcat(left, foo); Token.token_grapheme = foo; return Token.token_grapheme; }
Combing Character Sequence in Perl 5.6.
/** * Combing Character Sequence in Perl 5.6. */
static private Token token_ccs = null; static synchronized Token getCombiningCharacterSequence() { if (Token.token_ccs != null) return Token.token_ccs; Token foo = Token.createClosure(Token.getRange("M", true)); // \pM* foo = Token.createConcat(Token.getRange("M", false), foo); // \PM + \pM* Token.token_ccs = foo; return Token.token_ccs; } // ------------------------------------------------------ // ------------------------------------------------------
This class represents a node in parse tree.
/** * This class represents a node in parse tree. */
static class StringToken extends Token implements java.io.Serializable { private static final long serialVersionUID = -4614366944218504172L; String string; final int refNumber; StringToken(int type, String str, int n) { super(type); this.string = str; this.refNumber = n; } int getReferenceNumber() { // for STRING return this.refNumber; } String getString() { // for STRING return this.string; } public String toString(int options) { if (this.type == BACKREFERENCE) return "\\"+this.refNumber; else return REUtil.quoteMeta(this.string); } }
This class represents a node in parse tree.
/** * This class represents a node in parse tree. */
static class ConcatToken extends Token implements java.io.Serializable { private static final long serialVersionUID = 8717321425541346381L; final Token child; final Token child2; ConcatToken(Token t1, Token t2) { super(Token.CONCAT); this.child = t1; this.child2 = t2; } int size() { return 2; } Token getChild(int index) { return index == 0 ? this.child : this.child2; } public String toString(int options) { String ret; if (this.child2.type == CLOSURE && this.child2.getChild(0) == this.child) { ret = this.child.toString(options)+"+"; } else if (this.child2.type == NONGREEDYCLOSURE && this.child2.getChild(0) == this.child) { ret = this.child.toString(options)+"+?"; } else ret = this.child.toString(options)+this.child2.toString(options); return ret; } }
This class represents a node in parse tree.
/** * This class represents a node in parse tree. */
static class CharToken extends Token implements java.io.Serializable { private static final long serialVersionUID = -4394272816279496989L; final int chardata; CharToken(int type, int ch) { super(type); this.chardata = ch; } int getChar() { return this.chardata; } public String toString(int options) { String ret; switch (this.type) { case CHAR: switch (this.chardata) { case '|': case '*': case '+': case '?': case '(': case ')': case '.': case '[': case '{': case '\\': ret = "\\"+(char)this.chardata; break; case '\f': ret = "\\f"; break; case '\n': ret = "\\n"; break; case '\r': ret = "\\r"; break; case '\t': ret = "\\t"; break; case 0x1b: ret = "\\e"; break; //case 0x0b: ret = "\\v"; break; default: if (this.chardata >= 0x10000) { String pre = "0"+Integer.toHexString(this.chardata); ret = "\\v"+pre.substring(pre.length()-6, pre.length()); } else ret = ""+(char)this.chardata; } break; case ANCHOR: if (this == Token.token_linebeginning || this == Token.token_lineend) ret = ""+(char)this.chardata; else ret = "\\"+(char)this.chardata; break; default: ret = null; } return ret; } boolean match(int ch) { if (this.type == CHAR) { return ch == this.chardata; } else throw new RuntimeException("NFAArrow#match(): Internal error: "+this.type); } }
This class represents a node in parse tree.
/** * This class represents a node in parse tree. */
static class ClosureToken extends Token implements java.io.Serializable { private static final long serialVersionUID = 1308971930673997452L; int min; int max; final Token child; ClosureToken(int type, Token tok) { super(type); this.child = tok; this.setMin(-1); this.setMax(-1); } int size() { return 1; } Token getChild(int index) { return this.child; } final void setMin(int min) { this.min = min; } final void setMax(int max) { this.max = max; } final int getMin() { return this.min; } final int getMax() { return this.max; } public String toString(int options) { String ret; if (this.type == CLOSURE) { if (this.getMin() < 0 && this.getMax() < 0) { ret = this.child.toString(options)+"*"; } else if (this.getMin() == this.getMax()) { ret = this.child.toString(options)+"{"+this.getMin()+"}"; } else if (this.getMin() >= 0 && this.getMax() >= 0) { ret = this.child.toString(options)+"{"+this.getMin()+","+this.getMax()+"}"; } else if (this.getMin() >= 0 && this.getMax() < 0) { ret = this.child.toString(options)+"{"+this.getMin()+",}"; } else throw new RuntimeException("Token#toString(): CLOSURE " +this.getMin()+", "+this.getMax()); } else { if (this.getMin() < 0 && this.getMax() < 0) { ret = this.child.toString(options)+"*?"; } else if (this.getMin() == this.getMax()) { ret = this.child.toString(options)+"{"+this.getMin()+"}?"; } else if (this.getMin() >= 0 && this.getMax() >= 0) { ret = this.child.toString(options)+"{"+this.getMin()+","+this.getMax()+"}?"; } else if (this.getMin() >= 0 && this.getMax() < 0) { ret = this.child.toString(options)+"{"+this.getMin()+",}?"; } else throw new RuntimeException("Token#toString(): NONGREEDYCLOSURE " +this.getMin()+", "+this.getMax()); } return ret; } }
This class represents a node in parse tree.
/** * This class represents a node in parse tree. */
static class ParenToken extends Token implements java.io.Serializable { private static final long serialVersionUID = -5938014719827987704L; final Token child; final int parennumber; ParenToken(int type, Token tok, int paren) { super(type); this.child = tok; this.parennumber = paren; } int size() { return 1; } Token getChild(int index) { return this.child; } int getParenNumber() { return this.parennumber; } public String toString(int options) { String ret = null; switch (this.type) { case PAREN: if (this.parennumber == 0) { ret = "(?:"+this.child.toString(options)+")"; } else { ret = "("+this.child.toString(options)+")"; } break; case LOOKAHEAD: ret = "(?="+this.child.toString(options)+")"; break; case NEGATIVELOOKAHEAD: ret = "(?!"+this.child.toString(options)+")"; break; case LOOKBEHIND: ret = "(?<="+this.child.toString(options)+")"; break; case NEGATIVELOOKBEHIND: ret = "(?<!"+this.child.toString(options)+")"; break; case INDEPENDENT: ret = "(?>"+this.child.toString(options)+")"; break; } return ret; } }
(?(condition)yes-pattern|no-pattern)
/** * (?(condition)yes-pattern|no-pattern) */
static class ConditionToken extends Token implements java.io.Serializable { private static final long serialVersionUID = 4353765277910594411L; final int refNumber; final Token condition; final Token yes; final Token no; ConditionToken(int refno, Token cond, Token yespat, Token nopat) { super(Token.CONDITION); this.refNumber = refno; this.condition = cond; this.yes = yespat; this.no = nopat; } int size() { return this.no == null ? 1 : 2; } Token getChild(int index) { if (index == 0) return this.yes; if (index == 1) return this.no; throw new RuntimeException("Internal Error: "+index); } public String toString(int options) { String ret; if (refNumber > 0) { ret = "(?("+refNumber+")"; } else if (this.condition.type == Token.ANCHOR) { ret = "(?("+this.condition+")"; } else { ret = "(?"+this.condition; } if (this.no == null) { ret += this.yes+")"; } else { ret += this.yes+"|"+this.no+")"; } return ret; } }
(ims-ims: .... )
/** * (ims-ims: .... ) */
static class ModifierToken extends Token implements java.io.Serializable { private static final long serialVersionUID = -9114536559696480356L; final Token child; final int add; final int mask; ModifierToken(Token tok, int add, int mask) { super(Token.MODIFIERGROUP); this.child = tok; this.add = add; this.mask = mask; } int size() { return 1; } Token getChild(int index) { return this.child; } int getOptions() { return this.add; } int getOptionsMask() { return this.mask; } public String toString(int options) { return "(?" +(this.add == 0 ? "" : REUtil.createOptionString(this.add)) +(this.mask == 0 ? "" : REUtil.createOptionString(this.mask)) +":" +this.child.toString(options) +")"; } }
This class represents a node in parse tree. for UNION or CONCAT.
/** * This class represents a node in parse tree. * for UNION or CONCAT. */
static class UnionToken extends Token implements java.io.Serializable { private static final long serialVersionUID = -2568843945989489861L; List<Token> children;
@serialFieldchildren Vector children
/** * @serialField children Vector children */
private static final ObjectStreamField[] serialPersistentFields = new ObjectStreamField[] { new ObjectStreamField("children", Vector.class), }; UnionToken(int type) { super(type); } @Override void addChild(Token tok) { if (tok == null) return; if (this.children == null) this.children = new ArrayList<>(); if (this.type == UNION) { this.children.add(tok); return; } // This is CONCAT, and new child is CONCAT. if (tok.type == CONCAT) { for (int i = 0; i < tok.size(); i ++) this.addChild(tok.getChild(i)); // Recursion return; } int size = this.children.size(); if (size == 0) { this.children.add(tok); return; } Token previous = this.children.get(size - 1); if (!((previous.type == CHAR || previous.type == STRING) && (tok.type == CHAR || tok.type == STRING))) { this.children.add(tok); return; } //System.err.println("Merge '"+previous+"' and '"+tok+"'."); StringBuilder buffer; int nextMaxLength = (tok.type == CHAR ? 2 : tok.getString().length()); if (previous.type == CHAR) { // Replace previous token by STRING buffer = new StringBuilder(2 + nextMaxLength); int ch = previous.getChar(); if (ch >= 0x10000) buffer.append(REUtil.decomposeToSurrogates(ch)); else buffer.append((char)ch); previous = Token.createString(null); this.children.set(size - 1, previous); } else { // STRING buffer = new StringBuilder(previous.getString().length() + nextMaxLength); buffer.append(previous.getString()); } if (tok.type == CHAR) { int ch = tok.getChar(); if (ch >= 0x10000) buffer.append(REUtil.decomposeToSurrogates(ch)); else buffer.append((char)ch); } else { buffer.append(tok.getString()); } ((StringToken)previous).string = new String(buffer); } @Override int size() { return this.children == null ? 0 : this.children.size(); } @Override Token getChild(int index) { return this.children.get(index); } @Override public String toString(int options) { String ret; if (this.type == CONCAT) { if (this.children.size() == 2) { Token ch = this.getChild(0); Token ch2 = this.getChild(1); if (ch2.type == CLOSURE && ch2.getChild(0) == ch) { ret = ch.toString(options)+"+"; } else if (ch2.type == NONGREEDYCLOSURE && ch2.getChild(0) == ch) { ret = ch.toString(options)+"+?"; } else ret = ch.toString(options)+ch2.toString(options); } else { StringBuilder sb = new StringBuilder(); this.children.stream().forEach((children1) -> { sb.append((children1).toString(options)); }); ret = sb.toString(); } return ret; } if (this.children.size() == 2 && this.getChild(1).type == EMPTY) { ret = this.getChild(0).toString(options)+"?"; } else if (this.children.size() == 2 && this.getChild(0).type == EMPTY) { ret = this.getChild(1).toString(options)+"??"; } else { StringBuilder sb = new StringBuilder(); sb.append((this.children.get(0)).toString(options)); for (int i = 1; i < this.children.size(); i ++) { sb.append('|'); sb.append((this.children.get(i)).toString(options)); } ret = sb.toString(); } return ret; }
@serialDataSerialized fields. Convert the List to Vector for backward compatibility.
/** * @serialData Serialized fields. Convert the List to Vector for backward compatibility. */
private void writeObject(ObjectOutputStream out) throws IOException { // Convert List to Vector Vector<Token> vChildren = (children == null)? null : new Vector<>(children); // Write serialized fields ObjectOutputStream.PutField pf = out.putFields(); pf.put("children", vChildren); out.writeFields(); } @SuppressWarnings("unchecked") private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException { // We have to read serialized fields first. ObjectInputStream.GetField gf = in.readFields(); Vector<Token> vChildren = (Vector<Token>)gf.get("children", null); //convert Vector back to List if (vChildren != null) children = new ArrayList<>(vChildren); } } }