001 /*
002 * Copyright (c) 2009 The openGion Project.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
013 * either express or implied. See the License for the specific language
014 * governing permissions and limitations under the License.
015 */
016 package org.opengion.fukurou.util;
017
018 /**
019 * KanaFilter.java は、半角カタカナを全角カタカナに変換するフィルター??ルです?
020 *
021 * 大??出典は、?CJKV日中韓越情報処??のフィルターアルゴリズ?す?
022 * 濁点?濁点の正しい処?含まれて?す?
023 *
024 * @version 4.0
025 * @author Kazuhiko Hasegawa
026 * @since JDK5.0,
027 */
028 public final class KanaFilter {
029
030 /**
031 * すべて?staticメソ?なので、コンストラクタを呼び出さなくしておきます?
032 *
033 */
034 private KanaFilter() {}
035
036 // uFF61 から uFF9Fまでの半角カナに対?u3002 ??u309C)
037 private static final char ZEN_KANA[] = {
038 '?,'?,'?,'?,'・',
039 'ヲ','ァ','ィ','ゥ','ェ','ォ',
040 'ャ','ュ','ョ','?,'ー',
041 'ア','イ','ウ','エ','オ',
042 'カ','キ','ク','ケ','コ',
043 'サ','シ','ス','セ','ソ',
044 'タ','?,'?,'?,'?,
045 '?,'?,'?,'?,'?,
046 '?,'?,'?,'?,'?,
047 '?,'?,'?,'メ','モ',
048 'ヤ','ユ','ヨ',
049 'ラ','リ','ル','レ','ロ',
050 'ワ','ン','?,'?
051 };
052
053 /**
054 * 半角カタカナを全角カタカナに
055 *
056 * 半角カタカナ?定義は、\uFF61 から \uFF9F までです?
057 *
058 * @param in 半角カタカナ文字?
059 *
060 * @return 全角文字?
061 */
062 public static String han2zen( final String in ) {
063 int ixIn = 0;
064 int ixOut = 0;
065 int len = in.length();
066 char[] input = in.toCharArray();
067 char[] output = new char[len + 1];
068
069 while( ixIn < len ) {
070 // 半角カタカナ??
071 if( input[ixIn] >= '\uFF61' && input[ixIn] <= '\uFF9F' ) {
072 if( ixIn + 1 >= len ) {
073 output[ixOut++] = ZEN_KANA[input[ixIn++] - '\uFF61'];
074 }
075 else {
076 // 濁点(ヴ)
077 if( input[ixIn+1] == '?? ||
078 input[ixIn+1] == '\u3099' ||
079 input[ixIn+1] == '? ) {
080 if( input[ixIn] == '?' ) {
081 output[ixOut++] = 'ヴ' ;
082 ixIn +=2 ;
083 }
084 else {
085 // 濁点(ガ?ド、バ??)
086 if( input[ixIn] >= '?' &&
087 input[ixIn] <= '?? ||
088 input[ixIn] >= '?? &&
089 input[ixIn] <= '?? ) {
090 output[ixOut] = ZEN_KANA[input[ixIn] - '\uFF61'];
091 output[ixOut++]++;
092 ixIn +=2 ;
093 }
094 else {
095 output[ixOut++] = ZEN_KANA[input[ixIn++] - '\uFF61'];
096 }
097 }
098 }
099 else {
100 // 半濁点(パ～?)
101 if( input[ixIn+1] == '?? ||
102 input[ixIn+1] == '\u309A' ||
103 input[ixIn+1] == '? ) {
104 if( input[ixIn] >= '?? &&
105 input[ixIn] <= '?? ) {
106 output[ixOut] = ZEN_KANA[input[ixIn] - '\uFF61'];
107 output[ixOut++]+=2;
108 ixIn +=2 ;
109 }
110 else {
111 output[ixOut++] = ZEN_KANA[input[ixIn++] - '\uFF61'];
112 }
113 }
114 else {
115 output[ixOut++] = ZEN_KANA[input[ixIn++] - '\uFF61'];
116 }
117 }
118 }
119 }
120 else {
121 output[ixOut++] = input[ixIn++];
122 }
123 }
124 String output_string = new String( output );
125 return output_string.substring(0,ixOut);
126 }
127
128 /**
129 * ?ト用 mainメソ?
130 *
131 * @param args 変換?字?
132 */
133 public static void main( final String[] args ) {
134 System.out.println( KanaFilter.han2zen( args[0] ) );
135 }
136
137 }