--- /dev/null
+package org.apache.lucene.analysis.standard.std31;
+
+/**
+ * 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.standard.StandardTokenizer;
+import org.apache.lucene.analysis.standard.StandardTokenizerInterface;
+import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+
+/**
+ * This class implements StandardTokenizer, except with a bug
+ * (https://issues.apache.org/jira/browse/LUCENE-3358) where Han and Hiragana
+ * characters would be split from combining characters:
+ * @deprecated This class is only for exact backwards compatibility
+ */
+@Deprecated
+%%
+
+%unicode 6.0
+%integer
+%final
+%public
+%class StandardTokenizerImpl31
+%implements StandardTokenizerInterface
+%function getNextToken
+%char
+
+%include src/java/org/apache/lucene/analysis/standard/std31/SUPPLEMENTARY.jflex-macro
+ALetter = ([\p{WB:ALetter}] | {ALetterSupp})
+Format = ([\p{WB:Format}] | {FormatSupp})
+Numeric = ([\p{WB:Numeric}] | {NumericSupp})
+Extend = ([\p{WB:Extend}] | {ExtendSupp})
+Katakana = ([\p{WB:Katakana}] | {KatakanaSupp})
+MidLetter = ([\p{WB:MidLetter}] | {MidLetterSupp})
+MidNum = ([\p{WB:MidNum}] | {MidNumSupp})
+MidNumLet = ([\p{WB:MidNumLet}] | {MidNumLetSupp})
+ExtendNumLet = ([\p{WB:ExtendNumLet}] | {ExtendNumLetSupp})
+ComplexContext = ([\p{LB:Complex_Context}] | {ComplexContextSupp})
+Han = ([\p{Script:Han}] | {HanSupp})
+Hiragana = ([\p{Script:Hiragana}] | {HiraganaSupp})
+
+// Script=Hangul & Aletter
+HangulEx = (!(!\p{Script:Hangul}|!\p{WB:ALetter})) ({Format} | {Extend})*
+// UAX#29 WB4. X (Extend | Format)* --> X
+//
+ALetterEx = {ALetter} ({Format} | {Extend})*
+// TODO: Convert hard-coded full-width numeric range to property intersection (something like [\p{Full-Width}&&\p{Numeric}]) once JFlex supports it
+NumericEx = ({Numeric} | [\uFF10-\uFF19]) ({Format} | {Extend})*
+KatakanaEx = {Katakana} ({Format} | {Extend})*
+MidLetterEx = ({MidLetter} | {MidNumLet}) ({Format} | {Extend})*
+MidNumericEx = ({MidNum} | {MidNumLet}) ({Format} | {Extend})*
+ExtendNumLetEx = {ExtendNumLet} ({Format} | {Extend})*
+
+
+%{
+ /** Alphanumeric sequences */
+ public static final int WORD_TYPE = StandardTokenizer.ALPHANUM;
+
+ /** Numbers */
+ public static final int NUMERIC_TYPE = StandardTokenizer.NUM;
+
+ /**
+ * Chars in class \p{Line_Break = Complex_Context} are from South East Asian
+ * scripts (Thai, Lao, Myanmar, Khmer, etc.). Sequences of these are kept
+ * together as as a single token rather than broken up, because the logic
+ * required to break them at word boundaries is too complex for UAX#29.
+ * <p>
+ * See Unicode Line Breaking Algorithm: http://www.unicode.org/reports/tr14/#SA
+ */
+ public static final int SOUTH_EAST_ASIAN_TYPE = StandardTokenizer.SOUTHEAST_ASIAN;
+
+ public static final int IDEOGRAPHIC_TYPE = StandardTokenizer.IDEOGRAPHIC;
+
+ public static final int HIRAGANA_TYPE = StandardTokenizer.HIRAGANA;
+
+ public static final int KATAKANA_TYPE = StandardTokenizer.KATAKANA;
+
+ public static final int HANGUL_TYPE = StandardTokenizer.HANGUL;
+
+ public final int yychar()
+ {
+ return yychar;
+ }
+
+ /**
+ * Fills CharTermAttribute with the current token text.
+ */
+ public final void getText(CharTermAttribute t) {
+ t.copyBuffer(zzBuffer, zzStartRead, zzMarkedPos-zzStartRead);
+ }
+%}
+
+%%
+
+// UAX#29 WB1. sot ÷
+// WB2. ÷ eot
+//
+<<EOF>> { return StandardTokenizerInterface.YYEOF; }
+
+// UAX#29 WB8. Numeric × Numeric
+// WB11. Numeric (MidNum | MidNumLet) × Numeric
+// WB12. Numeric × (MidNum | MidNumLet) Numeric
+// WB13a. (ALetter | Numeric | Katakana | ExtendNumLet) × ExtendNumLet
+// WB13b. ExtendNumLet × (ALetter | Numeric | Katakana)
+//
+{ExtendNumLetEx}* {NumericEx} ({ExtendNumLetEx}+ {NumericEx}
+ | {MidNumericEx} {NumericEx}
+ | {NumericEx})*
+{ExtendNumLetEx}*
+ { return NUMERIC_TYPE; }
+
+// subset of the below for typing purposes only!
+{HangulEx}+
+ { return HANGUL_TYPE; }
+
+{KatakanaEx}+
+ { return KATAKANA_TYPE; }
+
+// UAX#29 WB5. ALetter × ALetter
+// WB6. ALetter × (MidLetter | MidNumLet) ALetter
+// WB7. ALetter (MidLetter | MidNumLet) × ALetter
+// WB9. ALetter × Numeric
+// WB10. Numeric × ALetter
+// WB13. Katakana × Katakana
+// WB13a. (ALetter | Numeric | Katakana | ExtendNumLet) × ExtendNumLet
+// WB13b. ExtendNumLet × (ALetter | Numeric | Katakana)
+//
+{ExtendNumLetEx}* ( {KatakanaEx} ({ExtendNumLetEx}* {KatakanaEx})*
+ | ( {NumericEx} ({ExtendNumLetEx}+ {NumericEx} | {MidNumericEx} {NumericEx} | {NumericEx})*
+ | {ALetterEx} ({ExtendNumLetEx}+ {ALetterEx} | {MidLetterEx} {ALetterEx} | {ALetterEx})* )+ )
+({ExtendNumLetEx}+ ( {KatakanaEx} ({ExtendNumLetEx}* {KatakanaEx})*
+ | ( {NumericEx} ({ExtendNumLetEx}+ {NumericEx} | {MidNumericEx} {NumericEx} | {NumericEx})*
+ | {ALetterEx} ({ExtendNumLetEx}+ {ALetterEx} | {MidLetterEx} {ALetterEx} | {ALetterEx})* )+ ) )*
+{ExtendNumLetEx}*
+ { return WORD_TYPE; }
+
+
+// From UAX #29:
+//
+// [C]haracters with the Line_Break property values of Contingent_Break (CB),
+// Complex_Context (SA/South East Asian), and XX (Unknown) are assigned word
+// boundary property values based on criteria outside of the scope of this
+// annex. That means that satisfactory treatment of languages like Chinese
+// or Thai requires special handling.
+//
+// In Unicode 6.0, only one character has the \p{Line_Break = Contingent_Break}
+// property: U+FFFC (  ) OBJECT REPLACEMENT CHARACTER.
+//
+// In the ICU implementation of UAX#29, \p{Line_Break = Complex_Context}
+// character sequences (from South East Asian scripts like Thai, Myanmar, Khmer,
+// Lao, etc.) are kept together. This grammar does the same below.
+//
+// See also the Unicode Line Breaking Algorithm:
+//
+// http://www.unicode.org/reports/tr14/#SA
+//
+{ComplexContext}+ { return SOUTH_EAST_ASIAN_TYPE; }
+
+// UAX#29 WB14. Any ÷ Any
+//
+{Han} { return IDEOGRAPHIC_TYPE; }
+{Hiragana} { return HIRAGANA_TYPE; }
+
+
+// UAX#29 WB3. CR × LF
+// WB3a. (Newline | CR | LF) ÷
+// WB3b. ÷ (Newline | CR | LF)
+// WB14. Any ÷ Any
+//
+[^] { /* Break so we don't hit fall-through warning: */ break; /* Not numeric, word, ideographic, hiragana, or SE Asian -- ignore it. */ }
fnp / pylucene.git / blobdiff