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com.optimaize.langdetect.cybozu.util.CharNormalizer Maven / Gradle / Ivy
package com.optimaize.langdetect.cybozu.util;
import java.util.HashMap;
import java.util.Map;
/**
* Some character normalization (and exclusion) functionality.
*
* This functionality was previously embedded in the NGram class.
*
* @author Nakatani Shuyo
* @author Fabian Kessler
*/
public class CharNormalizer {
/**
* Character Normalization (and exclusion).
* @return Normalized character, the space to exclude the character.
*/
public static char normalize(char ch) {
Character.UnicodeBlock block = Character.UnicodeBlock.of(ch);
if (block == Character.UnicodeBlock.BASIC_LATIN) {
if (ch<'A' || (ch<'a' && ch >'Z') || ch>'z') ch = ' ';
} else if (block == Character.UnicodeBlock.LATIN_1_SUPPLEMENT) {
if (LATIN1_EXCLUDED.indexOf(ch)>=0) ch = ' ';
} else if (block == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
ch = ' ';
} else if (block == Character.UnicodeBlock.ARABIC) {
if (ch == '\u06cc') ch = '\u064a';
} else if (block == Character.UnicodeBlock.LATIN_EXTENDED_ADDITIONAL) {
if (ch >= '\u1ea0') ch = '\u1ec3';
} else if (block == Character.UnicodeBlock.HIRAGANA) {
ch = '\u3042';
} else if (block == Character.UnicodeBlock.KATAKANA) {
ch = '\u30a2';
} else if (block == Character.UnicodeBlock.BOPOMOFO || block == Character.UnicodeBlock.BOPOMOFO_EXTENDED) {
ch = '\u3105';
} else if (block == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS) {
if (cjk_map.containsKey(ch)) ch = cjk_map.get(ch);
} else if (block == Character.UnicodeBlock.HANGUL_SYLLABLES) {
ch = '\uac00';
}
return ch;
}
private static final String LATIN1_EXCLUDED = Messages.getString("NGram.LATIN1_EXCLUDE");
private static final Map cjk_map;
/**
* CJK Kanji Normalization Mapping
*/
private static final String[] CJK_CLASS = {
Messages.getString("NGram.KANJI_1_0"),
Messages.getString("NGram.KANJI_1_2"),
Messages.getString("NGram.KANJI_1_4"),
Messages.getString("NGram.KANJI_1_8"),
Messages.getString("NGram.KANJI_1_11"),
Messages.getString("NGram.KANJI_1_12"),
Messages.getString("NGram.KANJI_1_13"),
Messages.getString("NGram.KANJI_1_14"),
Messages.getString("NGram.KANJI_1_16"),
Messages.getString("NGram.KANJI_1_18"),
Messages.getString("NGram.KANJI_1_22"),
Messages.getString("NGram.KANJI_1_27"),
Messages.getString("NGram.KANJI_1_29"),
Messages.getString("NGram.KANJI_1_31"),
Messages.getString("NGram.KANJI_1_35"),
Messages.getString("NGram.KANJI_2_0"),
Messages.getString("NGram.KANJI_2_1"),
Messages.getString("NGram.KANJI_2_4"),
Messages.getString("NGram.KANJI_2_9"),
Messages.getString("NGram.KANJI_2_10"),
Messages.getString("NGram.KANJI_2_11"),
Messages.getString("NGram.KANJI_2_12"),
Messages.getString("NGram.KANJI_2_13"),
Messages.getString("NGram.KANJI_2_15"),
Messages.getString("NGram.KANJI_2_16"),
Messages.getString("NGram.KANJI_2_18"),
Messages.getString("NGram.KANJI_2_21"),
Messages.getString("NGram.KANJI_2_22"),
Messages.getString("NGram.KANJI_2_23"),
Messages.getString("NGram.KANJI_2_28"),
Messages.getString("NGram.KANJI_2_29"),
Messages.getString("NGram.KANJI_2_30"),
Messages.getString("NGram.KANJI_2_31"),
Messages.getString("NGram.KANJI_2_32"),
Messages.getString("NGram.KANJI_2_35"),
Messages.getString("NGram.KANJI_2_36"),
Messages.getString("NGram.KANJI_2_37"),
Messages.getString("NGram.KANJI_2_38"),
Messages.getString("NGram.KANJI_3_1"),
Messages.getString("NGram.KANJI_3_2"),
Messages.getString("NGram.KANJI_3_3"),
Messages.getString("NGram.KANJI_3_4"),
Messages.getString("NGram.KANJI_3_5"),
Messages.getString("NGram.KANJI_3_8"),
Messages.getString("NGram.KANJI_3_9"),
Messages.getString("NGram.KANJI_3_11"),
Messages.getString("NGram.KANJI_3_12"),
Messages.getString("NGram.KANJI_3_13"),
Messages.getString("NGram.KANJI_3_15"),
Messages.getString("NGram.KANJI_3_16"),
Messages.getString("NGram.KANJI_3_18"),
Messages.getString("NGram.KANJI_3_19"),
Messages.getString("NGram.KANJI_3_22"),
Messages.getString("NGram.KANJI_3_23"),
Messages.getString("NGram.KANJI_3_27"),
Messages.getString("NGram.KANJI_3_29"),
Messages.getString("NGram.KANJI_3_30"),
Messages.getString("NGram.KANJI_3_31"),
Messages.getString("NGram.KANJI_3_32"),
Messages.getString("NGram.KANJI_3_35"),
Messages.getString("NGram.KANJI_3_36"),
Messages.getString("NGram.KANJI_3_37"),
Messages.getString("NGram.KANJI_3_38"),
Messages.getString("NGram.KANJI_4_0"),
Messages.getString("NGram.KANJI_4_9"),
Messages.getString("NGram.KANJI_4_10"),
Messages.getString("NGram.KANJI_4_16"),
Messages.getString("NGram.KANJI_4_17"),
Messages.getString("NGram.KANJI_4_18"),
Messages.getString("NGram.KANJI_4_22"),
Messages.getString("NGram.KANJI_4_24"),
Messages.getString("NGram.KANJI_4_28"),
Messages.getString("NGram.KANJI_4_34"),
Messages.getString("NGram.KANJI_4_39"),
Messages.getString("NGram.KANJI_5_10"),
Messages.getString("NGram.KANJI_5_11"),
Messages.getString("NGram.KANJI_5_12"),
Messages.getString("NGram.KANJI_5_13"),
Messages.getString("NGram.KANJI_5_14"),
Messages.getString("NGram.KANJI_5_18"),
Messages.getString("NGram.KANJI_5_26"),
Messages.getString("NGram.KANJI_5_29"),
Messages.getString("NGram.KANJI_5_34"),
Messages.getString("NGram.KANJI_5_39"),
Messages.getString("NGram.KANJI_6_0"),
Messages.getString("NGram.KANJI_6_3"),
Messages.getString("NGram.KANJI_6_9"),
Messages.getString("NGram.KANJI_6_10"),
Messages.getString("NGram.KANJI_6_11"),
Messages.getString("NGram.KANJI_6_12"),
Messages.getString("NGram.KANJI_6_16"),
Messages.getString("NGram.KANJI_6_18"),
Messages.getString("NGram.KANJI_6_20"),
Messages.getString("NGram.KANJI_6_21"),
Messages.getString("NGram.KANJI_6_22"),
Messages.getString("NGram.KANJI_6_23"),
Messages.getString("NGram.KANJI_6_25"),
Messages.getString("NGram.KANJI_6_28"),
Messages.getString("NGram.KANJI_6_29"),
Messages.getString("NGram.KANJI_6_30"),
Messages.getString("NGram.KANJI_6_32"),
Messages.getString("NGram.KANJI_6_34"),
Messages.getString("NGram.KANJI_6_35"),
Messages.getString("NGram.KANJI_6_37"),
Messages.getString("NGram.KANJI_6_39"),
Messages.getString("NGram.KANJI_7_0"),
Messages.getString("NGram.KANJI_7_3"),
Messages.getString("NGram.KANJI_7_6"),
Messages.getString("NGram.KANJI_7_7"),
Messages.getString("NGram.KANJI_7_9"),
Messages.getString("NGram.KANJI_7_11"),
Messages.getString("NGram.KANJI_7_12"),
Messages.getString("NGram.KANJI_7_13"),
Messages.getString("NGram.KANJI_7_16"),
Messages.getString("NGram.KANJI_7_18"),
Messages.getString("NGram.KANJI_7_19"),
Messages.getString("NGram.KANJI_7_20"),
Messages.getString("NGram.KANJI_7_21"),
Messages.getString("NGram.KANJI_7_23"),
Messages.getString("NGram.KANJI_7_25"),
Messages.getString("NGram.KANJI_7_28"),
Messages.getString("NGram.KANJI_7_29"),
Messages.getString("NGram.KANJI_7_32"),
Messages.getString("NGram.KANJI_7_33"),
Messages.getString("NGram.KANJI_7_35"),
Messages.getString("NGram.KANJI_7_37"),
};
static {
cjk_map = new HashMap<>();
for (String cjk_list : CJK_CLASS) {
char representative = cjk_list.charAt(0);
for (int i=0;i
