DecoratedStr.java

   1 import java.util.Hashtable;
   2 import java.util.Enumeration;
   3 public class DecoratedStr {
   4     protected static Hashtable<Character,String> char_to_alternatives_lower = new Hashtable<Character,String>();
   5     protected static Hashtable<Character,String> char_to_alternatives = new Hashtable<Character,String>();
   6     protected static Hashtable<Character,Character> alternative_to_char = new Hashtable<Character,Character>();
   7     protected static Hashtable<Character,String> ligatures_expansions_lower = new Hashtable<Character,String>();
   8     protected static Hashtable<Character,String> ligatures_expansions = new Hashtable<Character,String>();
   9     protected static Hashtable<String,Character> ligatures_contractions = new Hashtable<String,Character>();
  10     private static boolean initialized = false;
  11
  12     public static void init() {
  13         if (initialized)
  14             return;
  15         char_to_alternatives_lower.put('a', "àáâãäåāăą");
  16         char_to_alternatives_lower.put('c', "çćĉċč");
  17         char_to_alternatives_lower.put('d', "ďđ");
  18         char_to_alternatives_lower.put('e', "èéêëēĕėęě");
  19         char_to_alternatives_lower.put('g', "ĝğġģ");
  20         char_to_alternatives_lower.put('h', "ĥħ");
  21         char_to_alternatives_lower.put('i', "ìíîïĩīĭįı");
  22         char_to_alternatives_lower.put('j', "ĵ");
  23         char_to_alternatives_lower.put('k', "ķ");
  24         char_to_alternatives_lower.put('l', "ĺļľŀł");
  25         char_to_alternatives_lower.put('n', "ñńņňŉŋ");
  26         char_to_alternatives_lower.put('o', "òóôöøōŏő");
  27         char_to_alternatives_lower.put('r', "ŕŗř");
  28         char_to_alternatives_lower.put('s', "śŝşš");
  29         char_to_alternatives_lower.put('t', "ţťŧ");
  30         char_to_alternatives_lower.put('u', "ùúûüũūŭůűų");
  31         char_to_alternatives_lower.put('w', "ŵ");
  32         char_to_alternatives_lower.put('y', "ýÿŷ");
  33         char_to_alternatives_lower.put('z', "źżž");
  34
  35         Enumeration<Character> e = char_to_alternatives_lower.keys();
  36         while (e.hasMoreElements()) {
  37             Character k = e.nextElement();
  38             String v = char_to_alternatives_lower.get(k);
  39             char_to_alternatives.put(k, v);
  40             char_to_alternatives.put(Character.toUpperCase(k), v.toUpperCase());
  41             //System.out.println(Character.toUpperCase(k));
  42             //System.out.println(v.toUpperCase());
  43         }
  44         char_to_alternatives.put('I', "İ");
  45
  46         e = char_to_alternatives.keys();
  47         while (e.hasMoreElements()) {
  48             Character k = e.nextElement();
  49             String v = char_to_alternatives.get(k);
  50             for (int i=v.length()-1; i>=0; --i) {
  51                 char a = v.charAt(i);
  52                 //System.out.println(k);
  53                 //System.out.println(a);
  54                 alternative_to_char.put(a, k);
  55             }
  56         }
  57
  58         ligatures_expansions_lower.put('æ', "ae");
  59         //ligatures_expansions_lower.put('ĳ', "ij"); buggy: see http://en.wikipedia.org/wiki/Typographic_ligature
  60         ligatures_expansions_lower.put('œ', "oe");
  61
  62         e = ligatures_expansions_lower.keys();
  63         while (e.hasMoreElements()) {
  64             Character k = e.nextElement();
  65             String v = ligatures_expansions_lower.get(k);
  66             ligatures_expansions.put(k, v);
  67             ligatures_contractions.put(v, k);
  68             String uv = Character.toUpperCase(v.charAt(0)) + v.substring(1);
  69             ligatures_expansions.put(Character.toUpperCase(k), uv);
  70             ligatures_contractions.put(uv, Character.toUpperCase(k));
  71         }
  72
  73         initialized = true;
  74     }
  75
  76     public static String remove_decoration(String txt) {
  77         init();
  78         String result = "";
  79         int len = txt.length();
  80         char l;
  81         Character al;
  82         String le;
  83         for (int i=0; i<len; ++i) {
  84             l = txt.charAt(i);
  85             al = alternative_to_char.get(l);
  86             if (al != null)
  87                 l = al;
  88             le = ligatures_expansions.get(l);
  89             if (le != null)
  90                 result += le;
  91             else
  92                 result += l;
  93         }
  94         return result;
  95     }
  96
  97     public static String decorated_match_single_char(char c, boolean case_sensitive) {
  98         init();
  99         if (!case_sensitive)
 100             c = Character.toLowerCase(c);
 101         String result = "" + c;
 102         String sa = char_to_alternatives.get(c);
 103         if (sa != null)
 104             result += sa;
 105         if (!case_sensitive) {
 106             String ur = result.toUpperCase();
 107             if (result.compareTo(ur) != 0)
 108                 result += ur;
 109         }
 110         if (result.length() > 1)
 111             return "[" + result + "]";
 112         else
 113             return result;
 114
 115     }
 116
 117     public static String decorated_match(String txt, boolean case_sensitive) {
 118         init();
 119         String result = "";
 120         txt = remove_decoration(txt);
 121         if (!case_sensitive)
 122             txt = txt.toLowerCase();
 123         int len = txt.length();
 124         for (int i=0; i<len; ++i) {
 125             char c1 = txt.charAt(i);
 126             String c12 = "" + c1;
 127             if (i < len-1)
 128                 c12 += txt.charAt(i+1);
 129             Character lc = ligatures_contractions.get(c12);
 130             if (lc != null) {
 131                 result += "(" + lc;
 132                 if (!case_sensitive)
 133                     result += "|" + Character.toUpperCase(lc);
 134                 result += '|'
 135                        + decorated_match_single_char(c12.charAt(0), case_sensitive)
 136                        + decorated_match_single_char(c12.charAt(1), case_sensitive)
 137                        + ')';
 138                 i += 1;
 139
 140             }
 141             else
 142                 result += decorated_match_single_char(c1, case_sensitive);
 143         }
 144         return result;
 145     }
 146
 147         public static void main(String argv[]) {
 148         String in = "Œuf";
 149                 System.out.println(in);
 150                 System.out.println(remove_decoration(in));
 151                 //System.out.println(decorated_match_single_char('m', true));
 152                 //System.out.println(decorated_match_single_char('m', false));
 153                 //System.out.println(decorated_match_single_char('h', true));
 154                 //System.out.println(decorated_match_single_char('h', false));
 155                 System.out.println(decorated_match(in, true));
 156                 System.out.println(decorated_match(in, false));
 157         }
 158 }