/**
* Encode a value with Double Metaphone, optionally using the alternate
* encoding.
*
* @param value String to encode
* @param alternate use alternate encode
* @return an encoded string
*/
public String doubleMetaphone(String value, bool alternate)
{
value = cleanInput(value);
if (value == null)
{
return(null);
}
bool slavoGermanic = isSlavoGermanic(value);
int index = isSilentStart(value) ? 1 : 0;
DoubleMetaphoneResult result = new DoubleMetaphoneResult(this.getMaxCodeLen(), this);
while (!result.isComplete() && index <= value.length() - 1)
{
switch (value.charAt(index))
{
case 'A':
case 'E':
case 'I':
case 'O':
case 'U':
case 'Y':
index = handleAEIOUY(value, result, index);
break;
case 'B':
result.append('P');
index = charAt(value, index + 1) == 'B' ? index + 2 : index + 1;
break;
case '\u00C7':
// A C with a Cedilla
result.append('S');
index++;
break;
case 'C':
index = handleC(value, result, index);
break;
case 'D':
index = handleD(value, result, index);
break;
case 'F':
result.append('F');
index = charAt(value, index + 1) == 'F' ? index + 2 : index + 1;
break;
case 'G':
index = handleG(value, result, index, slavoGermanic);
break;
case 'H':
index = handleH(value, result, index);
break;
case 'J':
index = handleJ(value, result, index, slavoGermanic);
break;
case 'K':
result.append('K');
index = charAt(value, index + 1) == 'K' ? index + 2 : index + 1;
break;
case 'L':
index = handleL(value, result, index);
break;
case 'M':
result.append('M');
index = conditionM0(value, index) ? index + 2 : index + 1;
break;
case 'N':
result.append('N');
index = charAt(value, index + 1) == 'N' ? index + 2 : index + 1;
break;
case '\u00D1':
// N with a tilde (spanish ene)
result.append('N');
index++;
break;
case 'P':
index = handleP(value, result, index);
break;
case 'Q':
result.append('K');
index = charAt(value, index + 1) == 'Q' ? index + 2 : index + 1;
break;
case 'R':
index = handleR(value, result, index, slavoGermanic);
break;
case 'S':
index = handleS(value, result, index, slavoGermanic);
break;
case 'T':
index = handleT(value, result, index);
break;
case 'V':
result.append('F');
index = charAt(value, index + 1) == 'V' ? index + 2 : index + 1;
break;
case 'W':
index = handleW(value, result, index);
break;
case 'X':
index = handleX(value, result, index);
break;
case 'Z':
index = handleZ(value, result, index, slavoGermanic);
break;
default:
index++;
break;
}
}
return(alternate ? result.getAlternate() : result.getPrimary());
}