-
Notifications
You must be signed in to change notification settings - Fork 463
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Former-commit-id: 5411f72
- Loading branch information
Showing
6 changed files
with
176 additions
and
18 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
149 changes: 149 additions & 0 deletions
149
grobid-core/src/main/java/org/grobid/core/utilities/UnicodeUtil.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| package org.grobid.core.utilities; | ||
|
|
||
| /** | ||
| * Class for holding static methods for processing related to unicode. | ||
| * | ||
| * @author Patrice Lopez | ||
| */ | ||
| public class UnicodeUtil { | ||
|
|
||
| // As java \s doesn’t support the Unicode white space property (\s matches | ||
| // [ \t\n\x0B\f\r]), here are the 26 code points of the "official" stable | ||
| // p{White_Space} unicode property | ||
| private static String whitespace_chars = "\\u0009" // CHARACTER TABULATION \t | ||
| + "\\u000A" // LINE FEED (LF) \n -> new line | ||
| + "\\u000B" // LINE TABULATION \v -> new line | ||
| + "\\u000C" // FORM FEED (FF) -> break page | ||
| + "\\u000D" // CARRIAGE RETURN (CR) \r | ||
| + "\\u0020" // SPACE | ||
| + "\\u0085" // NEXT LINE (NEL) -> new line | ||
| + "\\u00A0" // NO-BREAK SPACE | ||
| + "\\u1680" // OGHAM SPACE MARK | ||
| + "\\u180E" // MONGOLIAN VOWEL SEPARATOR | ||
| + "\\u2000" // EN QUAD | ||
| + "\\u2001" // EM QUAD | ||
| + "\\u2002" // EN SPACE | ||
| + "\\u2003" // EM SPACE | ||
| + "\\u2004" // THREE-PER-EM SPACE | ||
| + "\\u2005" // FOUR-PER-EM SPACE | ||
| + "\\u2006" // SIX-PER-EM SPACE | ||
| + "\\u2007" // FIGURE SPACE | ||
| + "\\u2008" // PUNCTUATION SPACE | ||
| + "\\u2009" // THIN SPACE | ||
| + "\\u200A" // HAIR SPACE | ||
| + "\\u2028" // LINE SEPARATOR | ||
| + "\\u2029" // PARAGRAPH SEPARATOR | ||
| + "\\u202F" // NARROW NO-BREAK SPACE | ||
| + "\\u205F" // MEDIUM MATHEMATICAL SPACE | ||
| + "\\u3000"; // IDEOGRAPHIC SPACE | ||
|
|
||
| // a more restrictive selection of horizontal white space characters than the | ||
| // Unicode p{White_Space} property (which includes new line and vertical spaces) | ||
| private static String my_whitespace_chars = "\\u0009" // CHARACTER TABULATION \t | ||
| + "\\u0020" // SPACE | ||
| + "\\u00A0" // NO-BREAK SPACE | ||
| + "\\u1680" // OGHAM SPACE MARK | ||
| + "\\u180E" // MONGOLIAN VOWEL SEPARATOR | ||
| + "\\u2000" // EN QUAD | ||
| + "\\u2001" // EM QUAD | ||
| + "\\u2002" // EN SPACE | ||
| + "\\u2003" // EM SPACE | ||
| + "\\u2004" // THREE-PER-EM SPACE | ||
| + "\\u2005" // FOUR-PER-EM SPACE | ||
| + "\\u2006" // SIX-PER-EM SPACE | ||
| + "\\u2007" // FIGURE SPACE | ||
| + "\\u2008" // PUNCTUATION SPACE | ||
| + "\\u2009" // THIN SPACE | ||
| + "\\u200A" // HAIR SPACE | ||
| + "\\u2028" // LINE SEPARATOR | ||
| + "\\u2029" // PARAGRAPH SEPARATOR | ||
| + "\\u202F" // NARROW NO-BREAK SPACE | ||
| + "\\u205F" // MEDIUM MATHEMATICAL SPACE | ||
| + "\\u3000"; // IDEOGRAPHIC SPACE | ||
|
|
||
| // all the horizontal low lines | ||
| private static String horizontal_low_lines_chars = "\\u005F" // low Line | ||
| + "\\u203F" // undertie | ||
| + "\\u2040" // character tie | ||
| + "\\u2054" // inverted undertie | ||
| + "\\uFE4D" // dashed low line | ||
| + "\\uFE4E" // centreline low line | ||
| + "\\uFE4F" // wavy low line | ||
| + "\\uFF3F" // fullwidth low line | ||
| + "\\uFE33" // Presentation Form For Vertical Low Line | ||
| + "\\uFE34"; // Presentation Form For Vertical Wavy Low Line | ||
|
|
||
| // all the vertical lines | ||
| private static String vertical_lines_chars = "\\u007C" // vertical line | ||
| + "\\u01C0" // Latin Letter Dental | ||
| + "\\u05C0" // Hebrew Punctuation Paseq | ||
| + "\\u2223" // Divides | ||
| + "\\u2758"; // Light Vertical Bar | ||
|
|
||
| // all new lines | ||
| private static String new_line_chars = "\\u000C" // form feed \f - normally a page break | ||
| + "\\u000A" // line feed \n | ||
| + "\\u000D" // carriage return \r | ||
| + "\\u000B" // line tabulation \v - concretely it's a new line | ||
| + "\\u0085"; // next line (NEL) | ||
|
|
||
| // all bullets | ||
| private static String bullet_chars = "\\u2022" // bullet | ||
| + "\\u2023" // triangular bullet | ||
| + "\\u25E6" // white bullet | ||
| + "\\u2043" // hyphen bullet | ||
| + "\\u204C" // black leftwards bullet | ||
| + "\\u204D" // black rightwards bullet | ||
| + "\\u2219" // bullet operator (use in math stuff) | ||
| + "\\u25D8" // inverse bullet | ||
| + "\\u29BE" // circled white bullet | ||
| + "\\u29BF" // circled bullet | ||
| + "\\u23FA" // black circle for record | ||
| + "\\u25CF" // black circle | ||
| + "\\u26AB" // medium black circle | ||
| + "\\u2B24"; // black large circle | ||
|
|
||
| private UnicodeUtil() {} | ||
|
|
||
| /** | ||
| * Normalise the space, EOL and punctuation unicode characters. | ||
| * | ||
| * In particular all the characters which are treated as space in | ||
| * C++ (http://en.cppreference.com/w/cpp/string/byte/isspace) | ||
| * will be replace by the punctuation space character U+2008 | ||
| * so that the token can be used to generate a robust feature vector | ||
| * legible as Wapiti input. | ||
| * | ||
| * @param token to be normalised | ||
| * @return normalised string, legible for Wapiti feature generation | ||
| */ | ||
| public static String normaliseToken(String token) { | ||
| if (token == null) | ||
| return null; | ||
|
|
||
| // see https://docs.oracle.com/javase/8/docs/api/java/lang/Character.html | ||
| // for Unicode character properties supported by Java | ||
|
|
||
| // normalise all horizontal space separator characters | ||
| token = token.replaceAll("["+my_whitespace_chars+"]", " "); | ||
|
|
||
| // normalise all EOL - special handling of "\r\n" as one single newline | ||
| token = token.replace("\r\n", "\n").replaceAll("["+new_line_chars+"\\p{Zl}\\p{Zp}]", "\n"); | ||
|
|
||
| // normalize dash via the unicode dash punctuation property | ||
| // note: we don't add the "hyphen bullet" character \\u2043 because it's actually a bullet | ||
| token = token.replaceAll("\\p{Pd}", "-"); | ||
|
|
||
| // normalize horizontal low lines | ||
| token = token.replaceAll('['+horizontal_low_lines_chars+']', "_"); | ||
|
|
||
| // normalize vertical lines | ||
| token = token.replaceAll('['+vertical_lines_chars+']', "|"); | ||
|
|
||
| // bullet normalisation | ||
| token = token.replaceAll('['+bullet_chars+']', "|"); | ||
|
|
||
| return token; | ||
| } | ||
|
|
||
| } |