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Lucene example source code file (WikipediaTokenizerImpl.java)

This example Lucene source code file (WikipediaTokenizerImpl.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

alphanum, alphanum, category, email, error, external_link, internal_link, internal_link, string, string, yyeof, yyeof, yyinitial, zz_error_msg

The Lucene WikipediaTokenizerImpl.java source code

/* The following code was generated by JFlex 1.5.0-SNAPSHOT on 10/3/10 8:05 AM */

package org.apache.lucene.analysis.wikipedia;

/**
 * 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.
 */

import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;


/**
 * This class is a scanner generated by 
 * <a href="http://www.jflex.de/">JFlex 1.5.0-SNAPSHOT
 * on 10/3/10 8:05 AM from the specification file
 * <tt>C:/Users/rmuir/workspace/lucene_3xclean/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/wikipedia/WikipediaTokenizerImpl.jflex
 */
class WikipediaTokenizerImpl {

  /** This character denotes the end of file */
  public static final int YYEOF = -1;

  /** initial size of the lookahead buffer */
  private static final int ZZ_BUFFERSIZE = 16384;

  /** lexical states */
  public static final int THREE_SINGLE_QUOTES_STATE = 10;
  public static final int EXTERNAL_LINK_STATE = 6;
  public static final int DOUBLE_EQUALS_STATE = 14;
  public static final int INTERNAL_LINK_STATE = 4;
  public static final int DOUBLE_BRACE_STATE = 16;
  public static final int CATEGORY_STATE = 2;
  public static final int YYINITIAL = 0;
  public static final int STRING = 18;
  public static final int FIVE_SINGLE_QUOTES_STATE = 12;
  public static final int TWO_SINGLE_QUOTES_STATE = 8;

  /**
   * ZZ_LEXSTATE[l] is the state in the DFA for the lexical state l
   * ZZ_LEXSTATE[l+1] is the state in the DFA for the lexical state l
   *                  at the beginning of a line
   * l is of the form l = 2*k, k a non negative integer
   */
  private static final int ZZ_LEXSTATE[] = { 
     0,  0,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  6,  7,  7, 
     8,  8,  9, 9
  };

  /** 
   * Translates characters to character classes
   */
  private static final String ZZ_CMAP_PACKED = 
    "\11\0\1\24\1\23\1\0\1\24\1\22\22\0\1\24\1\0\1\12"+
    "\1\53\2\0\1\3\1\1\4\0\1\14\1\5\1\2\1\10\12\16"+
    "\1\27\1\0\1\7\1\11\1\13\1\53\1\4\2\15\1\30\5\15"+
    "\1\41\21\15\1\25\1\0\1\26\1\0\1\6\1\0\1\31\1\43"+
    "\2\15\1\33\1\40\1\34\1\50\1\41\4\15\1\42\1\35\1\51"+
    "\1\15\1\36\1\52\1\32\3\15\1\44\1\37\1\15\1\45\1\47"+
    "\1\46\102\0\27\15\1\0\37\15\1\0\u0568\15\12\17\206\15\12\17"+
    "\u026c\15\12\17\166\15\12\17\166\15\12\17\166\15\12\17\166\15\12\17"+
    "\167\15\11\17\166\15\12\17\166\15\12\17\166\15\12\17\340\15\12\17"+
    "\166\15\12\17\u0166\15\12\17\266\15\u0100\15\u0e00\15\u1040\0\u0150\21\140\0"+
    "\20\21\u0100\0\200\21\200\0\u19c0\21\100\0\u5200\21\u0c00\0\u2bb0\20\u2150\0"+
    "\u0200\21\u0465\0\73\21\75\15\43\0";

  /** 
   * Translates characters to character classes
   */
  private static final char [] ZZ_CMAP = zzUnpackCMap(ZZ_CMAP_PACKED);

  /** 
   * Translates DFA states to action switch labels.
   */
  private static final int [] ZZ_ACTION = zzUnpackAction();

  private static final String ZZ_ACTION_PACKED_0 =
    "\12\0\4\1\4\2\1\3\1\1\1\4\1\1\2\5"+
    "\1\6\2\5\1\7\1\5\2\10\1\11\1\12\1\11"+
    "\1\13\1\14\1\10\1\15\1\16\1\15\1\17\1\20"+
    "\1\10\1\21\1\10\4\22\1\23\1\22\1\24\1\25"+
    "\1\26\3\0\1\27\14\0\1\30\1\31\1\32\1\33"+
    "\1\11\1\0\1\34\1\35\1\0\1\36\1\0\1\37"+
    "\3\0\1\40\1\41\2\42\1\41\2\43\2\0\1\42"+
    "\1\0\14\42\1\41\3\0\1\11\1\44\3\0\1\45"+
    "\1\46\5\0\1\47\4\0\1\47\2\0\2\47\2\0"+
    "\1\11\5\0\1\31\1\41\1\42\1\50\3\0\1\11"+
    "\2\0\1\51\30\0\1\52\2\0\1\53\1\54\1\55";

  private static int [] zzUnpackAction() {
    int [] result = new int[183];
    int offset = 0;
    offset = zzUnpackAction(ZZ_ACTION_PACKED_0, offset, result);
    return result;
  }

  private static int zzUnpackAction(String packed, int offset, int [] result) {
    int i = 0;       /* index in packed string  */
    int j = offset;  /* index in unpacked array */
    int l = packed.length();
    while (i < l) {
      int count = packed.charAt(i++);
      int value = packed.charAt(i++);
      do result[j++] = value; while (--count > 0);
    }
    return j;
  }


  /** 
   * Translates a state to a row index in the transition table
   */
  private static final int [] ZZ_ROWMAP = zzUnpackRowMap();

  private static final String ZZ_ROWMAP_PACKED_0 =
    "\0\0\0\54\0\130\0\204\0\260\0\334\0\u0108\0\u0134"+
    "\0\u0160\0\u018c\0\u01b8\0\u01e4\0\u0210\0\u023c\0\u0268\0\u0294"+
    "\0\u02c0\0\u02ec\0\u01b8\0\u0318\0\u0344\0\u0370\0\u01b8\0\u039c"+
    "\0\u03c8\0\u03f4\0\u0420\0\u044c\0\u0478\0\u01b8\0\u039c\0\u04a4"+
    "\0\u01b8\0\u04d0\0\u04fc\0\u0528\0\u0554\0\u0580\0\u05ac\0\u05d8"+
    "\0\u0604\0\u0630\0\u065c\0\u0688\0\u06b4\0\u01b8\0\u06e0\0\u039c"+
    "\0\u070c\0\u0738\0\u0764\0\u0790\0\u01b8\0\u01b8\0\u07bc\0\u07e8"+
    "\0\u0814\0\u01b8\0\u0840\0\u086c\0\u0898\0\u08c4\0\u08f0\0\u091c"+
    "\0\u0948\0\u0974\0\u09a0\0\u09cc\0\u09f8\0\u0a24\0\u0a50\0\u0a7c"+
    "\0\u01b8\0\u01b8\0\u0aa8\0\u0ad4\0\u0b00\0\u0b00\0\u0b2c\0\u0b58"+
    "\0\u0b84\0\u0bb0\0\u0bdc\0\u0c08\0\u0c34\0\u0c60\0\u0c8c\0\u0cb8"+
    "\0\u0ce4\0\u0d10\0\u0898\0\u0d3c\0\u0d68\0\u0d94\0\u0dc0\0\u0dec"+
    "\0\u0e18\0\u0e44\0\u0e70\0\u0e9c\0\u0ec8\0\u0ef4\0\u0f20\0\u0f4c"+
    "\0\u0f78\0\u0fa4\0\u0fd0\0\u0ffc\0\u1028\0\u1054\0\u1080\0\u10ac"+
    "\0\u10d8\0\u01b8\0\u1104\0\u1130\0\u115c\0\u1188\0\u01b8\0\u11b4"+
    "\0\u11e0\0\u120c\0\u1238\0\u1264\0\u1290\0\u12bc\0\u12e8\0\u1314"+
    "\0\u1340\0\u136c\0\u1398\0\u13c4\0\u086c\0\u09f8\0\u13f0\0\u141c"+
    "\0\u1448\0\u1474\0\u14a0\0\u14cc\0\u14f8\0\u1524\0\u01b8\0\u1550"+
    "\0\u157c\0\u15a8\0\u15d4\0\u1600\0\u162c\0\u1658\0\u1684\0\u16b0"+
    "\0\u01b8\0\u16dc\0\u1708\0\u1734\0\u1760\0\u178c\0\u17b8\0\u17e4"+
    "\0\u1810\0\u183c\0\u1868\0\u1894\0\u18c0\0\u18ec\0\u1918\0\u1944"+
    "\0\u1970\0\u199c\0\u19c8\0\u19f4\0\u1a20\0\u1a4c\0\u1a78\0\u1aa4"+
    "\0\u1ad0\0\u1afc\0\u1b28\0\u1b54\0\u01b8\0\u01b8\0\u01b8";

  private static int [] zzUnpackRowMap() {
    int [] result = new int[183];
    int offset = 0;
    offset = zzUnpackRowMap(ZZ_ROWMAP_PACKED_0, offset, result);
    return result;
  }

  private static int zzUnpackRowMap(String packed, int offset, int [] result) {
    int i = 0;  /* index in packed string  */
    int j = offset;  /* index in unpacked array */
    int l = packed.length();
    while (i < l) {
      int high = packed.charAt(i++) << 16;
      result[j++] = high | packed.charAt(i++);
    }
    return j;
  }

  /** 
   * The transition table of the DFA
   */
  private static final int [] ZZ_TRANS = zzUnpackTrans();

  private static final String ZZ_TRANS_PACKED_0 =
    "\1\13\1\14\5\13\1\15\1\13\1\16\3\13\1\17"+
    "\1\20\1\21\1\22\1\23\1\24\2\13\1\25\2\13"+
    "\15\17\1\26\2\13\3\17\1\13\7\27\1\30\5\27"+
    "\4\31\1\27\1\32\3\27\1\33\1\27\15\31\3\27"+
    "\3\31\10\27\1\30\5\27\4\34\1\27\1\32\3\27"+
    "\1\35\1\27\15\34\3\27\3\34\1\27\7\36\1\37"+
    "\5\36\4\40\1\36\1\32\2\27\1\36\1\41\1\36"+
    "\15\40\3\36\1\42\2\40\2\36\1\43\5\36\1\37"+
    "\5\36\4\44\1\36\1\45\2\36\1\46\2\36\15\44"+
    "\3\36\3\44\10\36\1\37\5\36\4\47\1\36\1\45"+
    "\2\36\1\46\2\36\15\47\3\36\3\47\10\36\1\37"+
    "\5\36\4\47\1\36\1\45\2\36\1\50\2\36\15\47"+
    "\3\36\3\47\10\36\1\37\1\36\1\51\3\36\4\52"+
    "\1\36\1\45\5\36\15\52\3\36\3\52\10\36\1\53"+
    "\5\36\4\54\1\36\1\45\5\36\15\54\1\36\1\55"+
    "\1\36\3\54\1\36\1\56\1\57\5\56\1\60\1\56"+
    "\1\61\3\56\4\62\1\56\1\63\2\56\1\64\2\56"+
    "\15\62\2\56\1\65\3\62\1\56\55\0\1\66\62\0"+
    "\1\67\4\0\4\70\7\0\6\70\1\71\6\70\3\0"+
    "\3\70\12\0\1\72\43\0\1\73\1\74\1\75\1\76"+
    "\2\77\1\0\1\100\3\0\1\100\1\17\1\20\1\21"+
    "\1\22\7\0\15\17\3\0\3\17\3\0\1\101\1\0"+
    "\1\102\2\103\1\0\1\104\3\0\1\104\3\20\1\22"+
    "\7\0\15\20\3\0\3\20\2\0\1\73\1\105\1\75"+
    "\1\76\2\103\1\0\1\104\3\0\1\104\1\21\1\20"+
    "\1\21\1\22\7\0\15\21\3\0\3\21\3\0\1\106"+
    "\1\0\1\102\2\77\1\0\1\100\3\0\1\100\4\22"+
    "\7\0\15\22\3\0\3\22\24\0\1\13\55\0\1\107"+
    "\73\0\1\110\16\0\1\67\4\0\4\70\7\0\15\70"+
    "\3\0\3\70\16\0\4\31\7\0\15\31\3\0\3\31"+
    "\24\0\1\27\56\0\1\111\42\0\4\34\7\0\15\34"+
    "\3\0\3\34\27\0\1\112\42\0\4\40\7\0\15\40"+
    "\3\0\3\40\16\0\4\40\7\0\2\40\1\113\12\40"+
    "\3\0\3\40\2\0\1\114\67\0\4\44\7\0\15\44"+
    "\3\0\3\44\24\0\1\36\55\0\1\115\43\0\4\47"+
    "\7\0\15\47\3\0\3\47\26\0\1\116\37\0\1\111"+
    "\57\0\4\52\7\0\15\52\3\0\3\52\11\0\1\117"+
    "\4\0\4\70\7\0\15\70\3\0\3\70\16\0\4\54"+
    "\7\0\15\54\3\0\3\54\47\0\1\111\6\0\1\120"+
    "\63\0\1\121\57\0\4\62\7\0\15\62\3\0\3\62"+
    "\24\0\1\56\55\0\1\122\43\0\4\70\7\0\15\70"+
    "\3\0\3\70\14\0\1\36\1\0\4\123\1\0\3\124"+
    "\3\0\15\123\3\0\3\123\14\0\1\36\1\0\4\123"+
    "\1\0\3\124\3\0\3\123\1\125\11\123\3\0\3\123"+
    "\16\0\1\126\1\0\1\126\10\0\15\126\3\0\3\126"+
    "\16\0\1\127\1\130\1\131\1\132\7\0\15\127\3\0"+
    "\3\127\16\0\1\133\1\0\1\133\10\0\15\133\3\0"+
    "\3\133\16\0\1\134\1\135\1\134\1\135\7\0\15\134"+
    "\3\0\3\134\16\0\1\136\2\137\1\140\7\0\15\136"+
    "\3\0\3\136\16\0\1\100\2\141\10\0\15\100\3\0"+
    "\3\100\16\0\1\142\2\143\1\144\7\0\15\142\3\0"+
    "\3\142\16\0\4\135\7\0\15\135\3\0\3\135\16\0"+
    "\1\145\2\146\1\147\7\0\15\145\3\0\3\145\16\0"+
    "\1\150\2\151\1\152\7\0\15\150\3\0\3\150\16\0"+
    "\1\153\1\143\1\154\1\144\7\0\15\153\3\0\3\153"+
    "\16\0\1\155\2\130\1\132\7\0\15\155\3\0\3\155"+
    "\30\0\1\156\1\157\64\0\1\160\27\0\4\40\7\0"+
    "\2\40\1\161\12\40\3\0\3\40\2\0\1\162\101\0"+
    "\1\163\1\164\40\0\4\70\7\0\6\70\1\165\6\70"+
    "\3\0\3\70\2\0\1\166\63\0\1\167\71\0\1\170"+
    "\1\171\34\0\1\172\1\0\1\36\1\0\4\123\1\0"+
    "\3\124\3\0\15\123\3\0\3\123\16\0\4\173\1\0"+
    "\3\124\3\0\15\173\3\0\3\173\12\0\1\172\1\0"+
    "\1\36\1\0\4\123\1\0\3\124\3\0\10\123\1\174"+
    "\4\123\3\0\3\123\2\0\1\73\13\0\1\126\1\0"+
    "\1\126\10\0\15\126\3\0\3\126\3\0\1\175\1\0"+
    "\1\102\2\176\6\0\1\127\1\130\1\131\1\132\7\0"+
    "\15\127\3\0\3\127\3\0\1\177\1\0\1\102\2\200"+
    "\1\0\1\201\3\0\1\201\3\130\1\132\7\0\15\130"+
    "\3\0\3\130\3\0\1\202\1\0\1\102\2\200\1\0"+
    "\1\201\3\0\1\201\1\131\1\130\1\131\1\132\7\0"+
    "\15\131\3\0\3\131\3\0\1\203\1\0\1\102\2\176"+
    "\6\0\4\132\7\0\15\132\3\0\3\132\3\0\1\204"+
    "\2\0\1\204\7\0\1\134\1\135\1\134\1\135\7\0"+
    "\15\134\3\0\3\134\3\0\1\204\2\0\1\204\7\0"+
    "\4\135\7\0\15\135\3\0\3\135\3\0\1\176\1\0"+
    "\1\102\2\176\6\0\1\136\2\137\1\140\7\0\15\136"+
    "\3\0\3\136\3\0\1\200\1\0\1\102\2\200\1\0"+
    "\1\201\3\0\1\201\3\137\1\140\7\0\15\137\3\0"+
    "\3\137\3\0\1\176\1\0\1\102\2\176\6\0\4\140"+
    "\7\0\15\140\3\0\3\140\3\0\1\201\2\0\2\201"+
    "\1\0\1\201\3\0\1\201\3\141\10\0\15\141\3\0"+
    "\3\141\3\0\1\106\1\0\1\102\2\77\1\0\1\100"+
    "\3\0\1\100\1\142\2\143\1\144\7\0\15\142\3\0"+
    "\3\142\3\0\1\101\1\0\1\102\2\103\1\0\1\104"+
    "\3\0\1\104\3\143\1\144\7\0\15\143\3\0\3\143"+
    "\3\0\1\106\1\0\1\102\2\77\1\0\1\100\3\0"+
    "\1\100\4\144\7\0\15\144\3\0\3\144\3\0\1\77"+
    "\1\0\1\102\2\77\1\0\1\100\3\0\1\100\1\145"+
    "\2\146\1\147\7\0\15\145\3\0\3\145\3\0\1\103"+
    "\1\0\1\102\2\103\1\0\1\104\3\0\1\104\3\146"+
    "\1\147\7\0\15\146\3\0\3\146\3\0\1\77\1\0"+
    "\1\102\2\77\1\0\1\100\3\0\1\100\4\147\7\0"+
    "\15\147\3\0\3\147\3\0\1\100\2\0\2\100\1\0"+
    "\1\100\3\0\1\100\1\150\2\151\1\152\7\0\15\150"+
    "\3\0\3\150\3\0\1\104\2\0\2\104\1\0\1\104"+
    "\3\0\1\104\3\151\1\152\7\0\15\151\3\0\3\151"+
    "\3\0\1\100\2\0\2\100\1\0\1\100\3\0\1\100"+
    "\4\152\7\0\15\152\3\0\3\152\3\0\1\205\1\0"+
    "\1\102\2\77\1\0\1\100\3\0\1\100\1\153\1\143"+
    "\1\154\1\144\7\0\15\153\3\0\3\153\3\0\1\206"+
    "\1\0\1\102\2\103\1\0\1\104\3\0\1\104\1\154"+
    "\1\143\1\154\1\144\7\0\15\154\3\0\3\154\3\0"+
    "\1\203\1\0\1\102\2\176\6\0\1\155\2\130\1\132"+
    "\7\0\15\155\3\0\3\155\31\0\1\157\54\0\1\207"+
    "\64\0\1\210\26\0\4\40\7\0\15\40\3\0\1\40"+
    "\1\211\1\40\31\0\1\164\54\0\1\212\35\0\1\36"+
    "\1\0\4\123\1\0\3\124\3\0\3\123\1\213\11\123"+
    "\3\0\3\123\2\0\1\214\102\0\1\171\54\0\1\215"+
    "\34\0\1\216\52\0\1\172\3\0\4\173\7\0\15\173"+
    "\3\0\3\173\12\0\1\172\1\0\1\217\1\0\4\123"+
    "\1\0\3\124\3\0\15\123\3\0\3\123\16\0\1\220"+
    "\1\132\1\220\1\132\7\0\15\220\3\0\3\220\16\0"+
    "\4\140\7\0\15\140\3\0\3\140\16\0\4\144\7\0"+
    "\15\144\3\0\3\144\16\0\4\147\7\0\15\147\3\0"+
    "\3\147\16\0\4\152\7\0\15\152\3\0\3\152\16\0"+
    "\1\221\1\144\1\221\1\144\7\0\15\221\3\0\3\221"+
    "\16\0\4\132\7\0\15\132\3\0\3\132\16\0\4\222"+
    "\7\0\15\222\3\0\3\222\33\0\1\223\61\0\1\224"+
    "\30\0\4\40\6\0\1\225\15\40\3\0\2\40\1\226"+
    "\33\0\1\227\32\0\1\172\1\0\1\36\1\0\4\123"+
    "\1\0\3\124\3\0\10\123\1\230\4\123\3\0\3\123"+
    "\2\0\1\231\104\0\1\232\36\0\4\233\7\0\15\233"+
    "\3\0\3\233\3\0\1\175\1\0\1\102\2\176\6\0"+
    "\1\220\1\132\1\220\1\132\7\0\15\220\3\0\3\220"+
    "\3\0\1\205\1\0\1\102\2\77\1\0\1\100\3\0"+
    "\1\100\1\221\1\144\1\221\1\144\7\0\15\221\3\0"+
    "\3\221\3\0\1\204\2\0\1\204\7\0\4\222\7\0"+
    "\15\222\3\0\3\222\34\0\1\234\55\0\1\235\26\0"+
    "\1\236\60\0\4\40\6\0\1\225\15\40\3\0\3\40"+
    "\34\0\1\237\31\0\1\172\1\0\1\111\1\0\4\123"+
    "\1\0\3\124\3\0\15\123\3\0\3\123\34\0\1\240"+
    "\32\0\1\241\2\0\4\233\7\0\15\233\3\0\3\233"+
    "\35\0\1\242\62\0\1\243\20\0\1\244\77\0\1\245"+
    "\53\0\1\246\32\0\1\36\1\0\4\173\1\0\3\124"+
    "\3\0\15\173\3\0\3\173\36\0\1\247\53\0\1\250"+
    "\33\0\4\251\7\0\15\251\3\0\3\251\36\0\1\252"+
    "\53\0\1\253\54\0\1\254\61\0\1\255\11\0\1\256"+
    "\12\0\4\251\7\0\15\251\3\0\3\251\37\0\1\257"+
    "\53\0\1\260\54\0\1\261\22\0\1\13\62\0\4\262"+
    "\7\0\15\262\3\0\3\262\40\0\1\263\53\0\1\264"+
    "\43\0\1\265\26\0\2\262\1\0\2\262\1\0\2\262"+
    "\2\0\5\262\7\0\15\262\3\0\4\262\27\0\1\266"+
    "\53\0\1\267\24\0";

  private static int [] zzUnpackTrans() {
    int [] result = new int[7040];
    int offset = 0;
    offset = zzUnpackTrans(ZZ_TRANS_PACKED_0, offset, result);
    return result;
  }

  private static int zzUnpackTrans(String packed, int offset, int [] result) {
    int i = 0;       /* index in packed string  */
    int j = offset;  /* index in unpacked array */
    int l = packed.length();
    while (i < l) {
      int count = packed.charAt(i++);
      int value = packed.charAt(i++);
      value--;
      do result[j++] = value; while (--count > 0);
    }
    return j;
  }


  /* error codes */
  private static final int ZZ_UNKNOWN_ERROR = 0;
  private static final int ZZ_NO_MATCH = 1;
  private static final int ZZ_PUSHBACK_2BIG = 2;

  /* error messages for the codes above */
  private static final String ZZ_ERROR_MSG[] = {
    "Unkown internal scanner error",
    "Error: could not match input",
    "Error: pushback value was too large"
  };

  /**
   * ZZ_ATTRIBUTE[aState] contains the attributes of state <code>aState
   */
  private static final int [] ZZ_ATTRIBUTE = zzUnpackAttribute();

  private static final String ZZ_ATTRIBUTE_PACKED_0 =
    "\12\0\1\11\7\1\1\11\3\1\1\11\6\1\1\11"+
    "\2\1\1\11\14\1\1\11\6\1\2\11\3\0\1\11"+
    "\14\0\2\1\2\11\1\1\1\0\2\1\1\0\1\1"+
    "\1\0\1\1\3\0\7\1\2\0\1\1\1\0\15\1"+
    "\3\0\1\1\1\11\3\0\1\1\1\11\5\0\1\1"+
    "\4\0\1\1\2\0\2\1\2\0\1\1\5\0\1\11"+
    "\3\1\3\0\1\1\2\0\1\11\30\0\1\1\2\0"+
    "\3\11";

  private static int [] zzUnpackAttribute() {
    int [] result = new int[183];
    int offset = 0;
    offset = zzUnpackAttribute(ZZ_ATTRIBUTE_PACKED_0, offset, result);
    return result;
  }

  private static int zzUnpackAttribute(String packed, int offset, int [] result) {
    int i = 0;       /* index in packed string  */
    int j = offset;  /* index in unpacked array */
    int l = packed.length();
    while (i < l) {
      int count = packed.charAt(i++);
      int value = packed.charAt(i++);
      do result[j++] = value; while (--count > 0);
    }
    return j;
  }

  /** the input device */
  private java.io.Reader zzReader;

  /** the current state of the DFA */
  private int zzState;

  /** the current lexical state */
  private int zzLexicalState = YYINITIAL;

  /** this buffer contains the current text to be matched and is
      the source of the yytext() string */
  private char zzBuffer[] = new char[ZZ_BUFFERSIZE];

  /** the textposition at the last accepting state */
  private int zzMarkedPos;

  /** the current text position in the buffer */
  private int zzCurrentPos;

  /** startRead marks the beginning of the yytext() string in the buffer */
  private int zzStartRead;

  /** endRead marks the last character in the buffer, that has been read
      from input */
  private int zzEndRead;

  /** number of newlines encountered up to the start of the matched text */
  private int yyline;

  /** the number of characters up to the start of the matched text */
  private int yychar;

  /**
   * the number of characters from the last newline up to the start of the 
   * matched text
   */
  private int yycolumn;

  /** 
   * zzAtBOL == true <=> the scanner is currently at the beginning of a line
   */
  private boolean zzAtBOL = true;

  /** zzAtEOF == true <=> the scanner is at the EOF */
  private boolean zzAtEOF;

  /** denotes if the user-EOF-code has already been executed */
  private boolean zzEOFDone;

  /* user code: */

public static final int ALPHANUM          = WikipediaTokenizer.ALPHANUM_ID;
public static final int APOSTROPHE        = WikipediaTokenizer.APOSTROPHE_ID;
public static final int ACRONYM           = WikipediaTokenizer.ACRONYM_ID;
public static final int COMPANY           = WikipediaTokenizer.COMPANY_ID;
public static final int EMAIL             = WikipediaTokenizer.EMAIL_ID;
public static final int HOST              = WikipediaTokenizer.HOST_ID;
public static final int NUM               = WikipediaTokenizer.NUM_ID;
public static final int CJ                = WikipediaTokenizer.CJ_ID;
public static final int INTERNAL_LINK     = WikipediaTokenizer.INTERNAL_LINK_ID;
public static final int EXTERNAL_LINK     = WikipediaTokenizer.EXTERNAL_LINK_ID;
public static final int CITATION          = WikipediaTokenizer.CITATION_ID;
public static final int CATEGORY          = WikipediaTokenizer.CATEGORY_ID;
public static final int BOLD              = WikipediaTokenizer.BOLD_ID;
public static final int ITALICS           = WikipediaTokenizer.ITALICS_ID;
public static final int BOLD_ITALICS      = WikipediaTokenizer.BOLD_ITALICS_ID;
public static final int HEADING           = WikipediaTokenizer.HEADING_ID;
public static final int SUB_HEADING       = WikipediaTokenizer.SUB_HEADING_ID;
public static final int EXTERNAL_LINK_URL = WikipediaTokenizer.EXTERNAL_LINK_URL_ID;


private int currentTokType;
private int numBalanced = 0;
private int positionInc = 1;
private int numLinkToks = 0;
//Anytime we start a new on a Wiki reserved token (category, link, etc.) this value will be 0, otherwise it will be the number of tokens seen
//this can be useful for detecting when a new reserved token is encountered
//see https://issues.apache.org/jira/browse/LUCENE-1133
private int numWikiTokensSeen = 0;

public static final String [] TOKEN_TYPES = WikipediaTokenizer.TOKEN_TYPES;

/**
Returns the number of tokens seen inside a category or link, etc.
@return the number of tokens seen inside the context of wiki syntax.
**/
public final int getNumWikiTokensSeen(){
  return numWikiTokensSeen;
}

public final int yychar()
{
    return yychar;
}

public final int getPositionIncrement(){
  return positionInc;
}

/**
 * Fills Lucene token with the current token text.
 */
final void getText(CharTermAttribute t) {
  t.copyBuffer(zzBuffer, zzStartRead, zzMarkedPos-zzStartRead);
}

final int setText(StringBuilder buffer){
  int length = zzMarkedPos - zzStartRead;
  buffer.append(zzBuffer, zzStartRead, length);
  return length;
}




  /**
   * Creates a new scanner
   * There is also a java.io.InputStream version of this constructor.
   *
   * @param   in  the java.io.Reader to read input from.
   */
  WikipediaTokenizerImpl(java.io.Reader in) {
    this.zzReader = in;
  }

  /**
   * Creates a new scanner.
   * There is also java.io.Reader version of this constructor.
   *
   * @param   in  the java.io.Inputstream to read input from.
   */
  WikipediaTokenizerImpl(java.io.InputStream in) {
    this(new java.io.InputStreamReader(in));
  }

  /** 
   * Unpacks the compressed character translation table.
   *
   * @param packed   the packed character translation table
   * @return         the unpacked character translation table
   */
  private static char [] zzUnpackCMap(String packed) {
    char [] map = new char[0x10000];
    int i = 0;  /* index in packed string  */
    int j = 0;  /* index in unpacked array */
    while (i < 230) {
      int  count = packed.charAt(i++);
      char value = packed.charAt(i++);
      do map[j++] = value; while (--count > 0);
    }
    return map;
  }


  /**
   * Refills the input buffer.
   *
   * @return      <code>false, iff there was new input.
   * 
   * @exception   java.io.IOException  if any I/O-Error occurs
   */
  private boolean zzRefill() throws java.io.IOException {

    /* first: make room (if you can) */
    if (zzStartRead > 0) {
      System.arraycopy(zzBuffer, zzStartRead,
                       zzBuffer, 0,
                       zzEndRead-zzStartRead);

      /* translate stored positions */
      zzEndRead-= zzStartRead;
      zzCurrentPos-= zzStartRead;
      zzMarkedPos-= zzStartRead;
      zzStartRead = 0;
    }

    /* is the buffer big enough? */
    if (zzCurrentPos >= zzBuffer.length) {
      /* if not: blow it up */
      char newBuffer[] = new char[zzCurrentPos*2];
      System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
      zzBuffer = newBuffer;
    }

    /* finally: fill the buffer with new input */
    int numRead = zzReader.read(zzBuffer, zzEndRead,
                                            zzBuffer.length-zzEndRead);

    if (numRead > 0) {
      zzEndRead+= numRead;
      return false;
    }
    // unlikely but not impossible: read 0 characters, but not at end of stream    
    if (numRead == 0) {
      int c = zzReader.read();
      if (c == -1) {
        return true;
      } else {
        zzBuffer[zzEndRead++] = (char) c;
        return false;
      }     
    }

	// numRead < 0
    return true;
  }

    
  /**
   * Closes the input stream.
   */
  public final void yyclose() throws java.io.IOException {
    zzAtEOF = true;            /* indicate end of file */
    zzEndRead = zzStartRead;  /* invalidate buffer    */

    if (zzReader != null)
      zzReader.close();
  }


  /**
   * Resets the scanner to read from a new input stream.
   * Does not close the old reader.
   *
   * All internal variables are reset, the old input stream 
   * <b>cannot be reused (internal buffer is discarded and lost).
   * Lexical state is set to <tt>ZZ_INITIAL.
   *
   * Internal scan buffer is resized down to its initial length, if it has grown.
   *
   * @param reader   the new input stream 
   */
  public final void yyreset(java.io.Reader reader) {
    zzReader = reader;
    zzAtBOL  = true;
    zzAtEOF  = false;
    zzEOFDone = false;
    zzEndRead = zzStartRead = 0;
    zzCurrentPos = zzMarkedPos = 0;
    yyline = yychar = yycolumn = 0;
    zzLexicalState = YYINITIAL;
    if (zzBuffer.length > ZZ_BUFFERSIZE)
      zzBuffer = new char[ZZ_BUFFERSIZE];
  }


  /**
   * Returns the current lexical state.
   */
  public final int yystate() {
    return zzLexicalState;
  }


  /**
   * Enters a new lexical state
   *
   * @param newState the new lexical state
   */
  public final void yybegin(int newState) {
    zzLexicalState = newState;
  }


  /**
   * Returns the text matched by the current regular expression.
   */
  public final String yytext() {
    return new String( zzBuffer, zzStartRead, zzMarkedPos-zzStartRead );
  }


  /**
   * Returns the character at position <tt>pos from the 
   * matched text. 
   * 
   * It is equivalent to yytext().charAt(pos), but faster
   *
   * @param pos the position of the character to fetch. 
   *            A value from 0 to yylength()-1.
   *
   * @return the character at position pos
   */
  public final char yycharat(int pos) {
    return zzBuffer[zzStartRead+pos];
  }


  /**
   * Returns the length of the matched text region.
   */
  public final int yylength() {
    return zzMarkedPos-zzStartRead;
  }


  /**
   * Reports an error that occured while scanning.
   *
   * In a wellformed scanner (no or only correct usage of 
   * yypushback(int) and a match-all fallback rule) this method 
   * will only be called with things that "Can't Possibly Happen".
   * If this method is called, something is seriously wrong
   * (e.g. a JFlex bug producing a faulty scanner etc.).
   *
   * Usual syntax/scanner level error handling should be done
   * in error fallback rules.
   *
   * @param   errorCode  the code of the errormessage to display
   */
  private void zzScanError(int errorCode) {
    String message;
    try {
      message = ZZ_ERROR_MSG[errorCode];
    }
    catch (ArrayIndexOutOfBoundsException e) {
      message = ZZ_ERROR_MSG[ZZ_UNKNOWN_ERROR];
    }

    throw new Error(message);
  } 


  /**
   * Pushes the specified amount of characters back into the input stream.
   *
   * They will be read again by then next call of the scanning method
   *
   * @param number  the number of characters to be read again.
   *                This number must not be greater than yylength()!
   */
  public void yypushback(int number)  {
    if ( number > yylength() )
      zzScanError(ZZ_PUSHBACK_2BIG);

    zzMarkedPos -= number;
  }


  /**
   * Resumes scanning until the next regular expression is matched,
   * the end of input is encountered or an I/O-Error occurs.
   *
   * @return      the next token
   * @exception   java.io.IOException  if any I/O-Error occurs
   */
  public int getNextToken() throws java.io.IOException {
    int zzInput;
    int zzAction;

    // cached fields:
    int zzCurrentPosL;
    int zzMarkedPosL;
    int zzEndReadL = zzEndRead;
    char [] zzBufferL = zzBuffer;
    char [] zzCMapL = ZZ_CMAP;

    int [] zzTransL = ZZ_TRANS;
    int [] zzRowMapL = ZZ_ROWMAP;
    int [] zzAttrL = ZZ_ATTRIBUTE;

    while (true) {
      zzMarkedPosL = zzMarkedPos;

      yychar+= zzMarkedPosL-zzStartRead;

      zzAction = -1;

      zzCurrentPosL = zzCurrentPos = zzStartRead = zzMarkedPosL;
  
      zzState = ZZ_LEXSTATE[zzLexicalState];


      zzForAction: {
        while (true) {
    
          if (zzCurrentPosL < zzEndReadL)
            zzInput = zzBufferL[zzCurrentPosL++];
          else if (zzAtEOF) {
            zzInput = YYEOF;
            break zzForAction;
          }
          else {
            // store back cached positions
            zzCurrentPos  = zzCurrentPosL;
            zzMarkedPos   = zzMarkedPosL;
            boolean eof = zzRefill();
            // get translated positions and possibly new buffer
            zzCurrentPosL  = zzCurrentPos;
            zzMarkedPosL   = zzMarkedPos;
            zzBufferL      = zzBuffer;
            zzEndReadL     = zzEndRead;
            if (eof) {
              zzInput = YYEOF;
              break zzForAction;
            }
            else {
              zzInput = zzBufferL[zzCurrentPosL++];
            }
          }
          int zzNext = zzTransL[ zzRowMapL[zzState] + zzCMapL[zzInput] ];
          if (zzNext == -1) break zzForAction;
          zzState = zzNext;

          int zzAttributes = zzAttrL[zzState];
          if ( (zzAttributes & 1) == 1 ) {
            zzAction = zzState;
            zzMarkedPosL = zzCurrentPosL;
            if ( (zzAttributes & 8) == 8 ) break zzForAction;
          }

        }
      }

      // store back cached position
      zzMarkedPos = zzMarkedPosL;

      switch (zzAction < 0 ? zzAction : ZZ_ACTION[zzAction]) {
        case 16: 
          { currentTokType = HEADING; yybegin(DOUBLE_EQUALS_STATE); numWikiTokensSeen++; return currentTokType;
          }
        case 46: break;
        case 39: 
          { positionInc = 1; return ACRONYM;
          }
        case 47: break;
        case 8: 
          { /* ignore */
          }
        case 48: break;
        case 20: 
          { numBalanced = 0; numWikiTokensSeen = 0; currentTokType = EXTERNAL_LINK;yybegin(EXTERNAL_LINK_STATE);
          }
        case 49: break;
        case 35: 
          { positionInc = 1; return COMPANY;
          }
        case 50: break;
        case 4: 
          { numWikiTokensSeen = 0; positionInc = 1; currentTokType = EXTERNAL_LINK_URL; yybegin(EXTERNAL_LINK_STATE);
          }
        case 51: break;
        case 25: 
          { numWikiTokensSeen = 0; positionInc = 1; currentTokType = CITATION; yybegin(DOUBLE_BRACE_STATE);
          }
        case 52: break;
        case 43: 
          { numWikiTokensSeen = 0; positionInc = 1; currentTokType = CATEGORY; yybegin(CATEGORY_STATE);
          }
        case 53: break;
        case 22: 
          { numWikiTokensSeen = 0; positionInc = 1; if (numBalanced == 0){numBalanced++;yybegin(TWO_SINGLE_QUOTES_STATE);} else{numBalanced = 0;}
          }
        case 54: break;
        case 34: 
          { positionInc = 1; return NUM;
          }
        case 55: break;
        case 32: 
          { positionInc = 1; return APOSTROPHE;
          }
        case 56: break;
        case 23: 
          { numWikiTokensSeen = 0; positionInc = 1; yybegin(DOUBLE_EQUALS_STATE);
          }
        case 57: break;
        case 21: 
          { yybegin(STRING); return currentTokType;/*pipe*/
          }
        case 58: break;
        case 2: 
          { positionInc = 1; return ALPHANUM;
          }
        case 59: break;
        case 29: 
          { currentTokType = INTERNAL_LINK; numWikiTokensSeen = 0;  yybegin(INTERNAL_LINK_STATE);
          }
        case 60: break;
        case 17: 
          { yybegin(DOUBLE_BRACE_STATE); numWikiTokensSeen = 0; return currentTokType;
          }
        case 61: break;
        case 44: 
          { currentTokType = CATEGORY; numWikiTokensSeen = 0; yybegin(CATEGORY_STATE);
          }
        case 62: break;
        case 26: 
          { yybegin(YYINITIAL);
          }
        case 63: break;
        case 3: 
          { positionInc = 1; return CJ;
          }
        case 64: break;
        case 38: 
          { numBalanced = 0;currentTokType = ALPHANUM; yybegin(YYINITIAL);/*end sub header*/
          }
        case 65: break;
        case 15: 
          { currentTokType = SUB_HEADING; numWikiTokensSeen = 0; yybegin(STRING);
          }
        case 66: break;
        case 30: 
          { numBalanced = 0;currentTokType = ALPHANUM; yybegin(YYINITIAL);/*end italics*/
          }
        case 67: break;
        case 6: 
          { yybegin(CATEGORY_STATE); numWikiTokensSeen++; return currentTokType;
          }
        case 68: break;
        case 5: 
          { positionInc = 1;
          }
        case 69: break;
        case 19: 
          { yybegin(STRING); numWikiTokensSeen++; return currentTokType;/* STRING ALPHANUM*/
          }
        case 70: break;
        case 42: 
          { positionInc = 1; numWikiTokensSeen++; yybegin(EXTERNAL_LINK_STATE); return currentTokType;
          }
        case 71: break;
        case 27: 
          { numLinkToks = 0; yybegin(YYINITIAL);
          }
        case 72: break;
        case 11: 
          { currentTokType = BOLD;  yybegin(THREE_SINGLE_QUOTES_STATE);
          }
        case 73: break;
        case 13: 
          { currentTokType = EXTERNAL_LINK; numWikiTokensSeen = 0; yybegin(EXTERNAL_LINK_STATE);
          }
        case 74: break;
        case 14: 
          { yybegin(STRING); numWikiTokensSeen++; return currentTokType;
          }
        case 75: break;
        case 45: 
          { numBalanced = 0; numWikiTokensSeen = 0; currentTokType = CATEGORY;yybegin(CATEGORY_STATE);
          }
        case 76: break;
        case 28: 
          { currentTokType = INTERNAL_LINK; numWikiTokensSeen = 0; yybegin(INTERNAL_LINK_STATE);
          }
        case 77: break;
        case 37: 
          { numBalanced = 0;currentTokType = ALPHANUM;yybegin(YYINITIAL);/*end bold*/
          }
        case 78: break;
        case 9: 
          { if (numLinkToks == 0){positionInc = 0;} else{positionInc = 1;} numWikiTokensSeen++; currentTokType = EXTERNAL_LINK; yybegin(EXTERNAL_LINK_STATE); numLinkToks++; return currentTokType;
          }
        case 79: break;
        case 7: 
          { yybegin(INTERNAL_LINK_STATE); numWikiTokensSeen++; return currentTokType;
          }
        case 80: break;
        case 24: 
          { numWikiTokensSeen = 0; positionInc = 1; currentTokType = INTERNAL_LINK; yybegin(INTERNAL_LINK_STATE);
          }
        case 81: break;
        case 40: 
          { positionInc = 1; return EMAIL;
          }
        case 82: break;
        case 1: 
          { numWikiTokensSeen = 0;  positionInc = 1;
          }
        case 83: break;
        case 18: 
          { /* ignore STRING */
          }
        case 84: break;
        case 36: 
          { currentTokType = BOLD_ITALICS;  yybegin(FIVE_SINGLE_QUOTES_STATE);
          }
        case 85: break;
        case 33: 
          { positionInc = 1; return HOST;
          }
        case 86: break;
        case 31: 
          { numBalanced = 0; numWikiTokensSeen = 0; currentTokType = INTERNAL_LINK;yybegin(INTERNAL_LINK_STATE);
          }
        case 87: break;
        case 41: 
          { numBalanced = 0;currentTokType = ALPHANUM; yybegin(YYINITIAL);/*end bold italics*/
          }
        case 88: break;
        case 12: 
          { currentTokType = ITALICS; numWikiTokensSeen++;  yybegin(STRING); return currentTokType;/*italics*/
          }
        case 89: break;
        case 10: 
          { numLinkToks = 0; positionInc = 0; yybegin(YYINITIAL);
          }
        case 90: break;
        default: 
          if (zzInput == YYEOF && zzStartRead == zzCurrentPos) {
            zzAtEOF = true;
            return YYEOF;
          } 
          else {
            zzScanError(ZZ_NO_MATCH);
          }
      }
    }
  }


}

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene WikipediaTokenizerImpl.java source code file:



my book on functional programming

 

new blog posts

 

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