--- /dev/null
+package org.apache.lucene.analysis.standard;
+
+/**
+ * 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 implements Word Break rules from the Unicode Text Segmentation
+ * algorithm, as specified in
+ * <a href="http://unicode.org/reports/tr29/">Unicode Standard Annex #29</a>
+ * URLs and email addresses are also tokenized according to the relevant RFCs.
+ * <p/>
+ * Tokens produced are of the following types:
+ * <ul>
+ * <li><ALPHANUM>: A sequence of alphabetic and numeric characters</li>
+ * <li><NUM>: A number</li>
+ * <li><URL>: A URL</li>
+ * <li><EMAIL>: An email address</li>
+ * <li><SOUTHEAST_ASIAN>: A sequence of characters from South and Southeast
+ * Asian languages, including Thai, Lao, Myanmar, and Khmer</li>
+ * <li><IDEOGRAPHIC>: A single CJKV ideographic character</li>
+ * <li><HIRAGANA>: A single hiragana character</li>
+ * </ul>
+ */
+%%
+
+%unicode 6.0
+%integer
+%final
+%public
+%class UAX29URLEmailTokenizerImpl
+%implements StandardTokenizerInterface
+%function getNextToken
+%char
+
+%include src/java/org/apache/lucene/analysis/standard/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})*
+
+HanEx = {Han} ({Format} | {Extend})*
+HiraganaEx = {Hiragana} ({Format} | {Extend})*
+
+// URL and E-mail syntax specifications:
+//
+// RFC-952: DOD INTERNET HOST TABLE SPECIFICATION
+// RFC-1035: DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION
+// RFC-1123: Requirements for Internet Hosts - Application and Support
+// RFC-1738: Uniform Resource Locators (URL)
+// RFC-3986: Uniform Resource Identifier (URI): Generic Syntax
+// RFC-5234: Augmented BNF for Syntax Specifications: ABNF
+// RFC-5321: Simple Mail Transfer Protocol
+// RFC-5322: Internet Message Format
+
+%include src/java/org/apache/lucene/analysis/standard/ASCIITLD.jflex-macro
+
+DomainLabel = [A-Za-z0-9] ([-A-Za-z0-9]* [A-Za-z0-9])?
+DomainNameStrict = {DomainLabel} ("." {DomainLabel})* {ASCIITLD}
+DomainNameLoose = {DomainLabel} ("." {DomainLabel})*
+
+IPv4DecimalOctet = "0"{0,2} [0-9] | "0"? [1-9][0-9] | "1" [0-9][0-9] | "2" ([0-4][0-9] | "5" [0-5])
+IPv4Address = {IPv4DecimalOctet} ("." {IPv4DecimalOctet}){3}
+IPv6Hex16Bit = [0-9A-Fa-f]{1,4}
+IPv6LeastSignificant32Bits = {IPv4Address} | ({IPv6Hex16Bit} ":" {IPv6Hex16Bit})
+IPv6Address = ({IPv6Hex16Bit} ":"){6} {IPv6LeastSignificant32Bits}
+ | "::" ({IPv6Hex16Bit} ":"){5} {IPv6LeastSignificant32Bits}
+ | {IPv6Hex16Bit}? "::" ({IPv6Hex16Bit} ":"){4} {IPv6LeastSignificant32Bits}
+ | (({IPv6Hex16Bit} ":"){0,1} {IPv6Hex16Bit})? "::" ({IPv6Hex16Bit} ":"){3} {IPv6LeastSignificant32Bits}
+ | (({IPv6Hex16Bit} ":"){0,2} {IPv6Hex16Bit})? "::" ({IPv6Hex16Bit} ":"){2} {IPv6LeastSignificant32Bits}
+ | (({IPv6Hex16Bit} ":"){0,3} {IPv6Hex16Bit})? "::" {IPv6Hex16Bit} ":" {IPv6LeastSignificant32Bits}
+ | (({IPv6Hex16Bit} ":"){0,4} {IPv6Hex16Bit})? "::" {IPv6LeastSignificant32Bits}
+ | (({IPv6Hex16Bit} ":"){0,5} {IPv6Hex16Bit})? "::" {IPv6Hex16Bit}
+ | (({IPv6Hex16Bit} ":"){0,6} {IPv6Hex16Bit})? "::"
+
+URIunreserved = [-._~A-Za-z0-9]
+URIpercentEncoded = "%" [0-9A-Fa-f]{2}
+URIsubDelims = [!$&'()*+,;=]
+URIloginSegment = ({URIunreserved} | {URIpercentEncoded} | {URIsubDelims})*
+URIlogin = {URIloginSegment} (":" {URIloginSegment})? "@"
+URIquery = "?" ({URIunreserved} | {URIpercentEncoded} | {URIsubDelims} | [:@/?])*
+URIfragment = "#" ({URIunreserved} | {URIpercentEncoded} | {URIsubDelims} | [:@/?])*
+URIport = ":" [0-9]{1,5}
+URIhostStrict = ("[" {IPv6Address} "]") | {IPv4Address} | {DomainNameStrict}
+URIhostLoose = ("[" {IPv6Address} "]") | {IPv4Address} | {DomainNameLoose}
+
+URIauthorityStrict = {URIhostStrict} {URIport}?
+URIauthorityLoose = {URIlogin}? {URIhostLoose} {URIport}?
+
+HTTPsegment = ({URIunreserved} | {URIpercentEncoded} | [;:@&=])*
+HTTPpath = ("/" {HTTPsegment})*
+HTTPscheme = [hH][tT][tT][pP][sS]? "://"
+HTTPurlFull = {HTTPscheme} {URIauthorityLoose} {HTTPpath}? {URIquery}? {URIfragment}?
+// {HTTPurlNoScheme} excludes {URIlogin}, because it could otherwise accept e-mail addresses
+HTTPurlNoScheme = {URIauthorityStrict} {HTTPpath}? {URIquery}? {URIfragment}?
+HTTPurl = {HTTPurlFull} | {HTTPurlNoScheme}
+
+FTPorFILEsegment = ({URIunreserved} | {URIpercentEncoded} | [?:@&=])*
+FTPorFILEpath = "/" {FTPorFILEsegment} ("/" {FTPorFILEsegment})*
+FTPtype = ";" [tT][yY][pP][eE] "=" [aAiIdD]
+FTPscheme = [fF][tT][pP] "://"
+FTPurl = {FTPscheme} {URIauthorityLoose} {FTPorFILEpath} {FTPtype}? {URIfragment}?
+
+FILEscheme = [fF][iI][lL][eE] "://"
+FILEurl = {FILEscheme} {URIhostLoose}? {FTPorFILEpath} {URIfragment}?
+
+URL = {HTTPurl} | {FTPurl} | {FILEurl}
+
+EMAILquotedString = [\"] ([\u0001-\u0008\u000B\u000C\u000E-\u0021\u0023-\u005B\u005D-\u007E] | [\\] [\u0000-\u007F])* [\"]
+EMAILatomText = [A-Za-z0-9!#$%&'*+-/=?\^_`{|}~]
+EMAILlabel = {EMAILatomText}+ | {EMAILquotedString}
+EMAILlocalPart = {EMAILlabel} ("." {EMAILlabel})*
+EMAILdomainLiteralText = [\u0001-\u0008\u000B\u000C\u000E-\u005A\u005E-\u007F] | [\\] [\u0000-\u007F]
+// DFA minimization allows {IPv6Address} and {IPv4Address} to be included
+// in the {EMAILbracketedHost} definition without incurring any size penalties,
+// since {EMAILdomainLiteralText} recognizes all valid IP addresses.
+// The IP address regexes are included in {EMAILbracketedHost} simply as a
+// reminder that they are acceptable bracketed host forms.
+EMAILbracketedHost = "[" ({EMAILdomainLiteralText}* | {IPv4Address} | [iI][pP][vV] "6:" {IPv6Address}) "]"
+EMAIL = {EMAILlocalPart} "@" ({DomainNameStrict} | {EMAILbracketedHost})
+
+
+%{
+ /** Alphanumeric sequences */
+ public static final int WORD_TYPE = UAX29URLEmailTokenizer.ALPHANUM;
+
+ /** Numbers */
+ public static final int NUMERIC_TYPE = UAX29URLEmailTokenizer.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 = UAX29URLEmailTokenizer.SOUTHEAST_ASIAN;
+
+ public static final int IDEOGRAPHIC_TYPE = UAX29URLEmailTokenizer.IDEOGRAPHIC;
+
+ public static final int HIRAGANA_TYPE = UAX29URLEmailTokenizer.HIRAGANA;
+
+ public static final int KATAKANA_TYPE = UAX29URLEmailTokenizer.KATAKANA;
+
+ public static final int HANGUL_TYPE = UAX29URLEmailTokenizer.HANGUL;
+
+ public static final int EMAIL_TYPE = UAX29URLEmailTokenizer.EMAIL;
+
+ public static final int URL_TYPE = UAX29URLEmailTokenizer.URL;
+
+ 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; }
+
+{URL} { return URL_TYPE; }
+{EMAIL} { return EMAIL_TYPE; }
+
+// 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
+//
+{HanEx} { return IDEOGRAPHIC_TYPE; }
+{HiraganaEx} { 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