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