private int parseBracketedNote(String s, int index, NoteContext context) {
int indexOfEndBracket = s.indexOf(']', index);
String stringInBrackets = s.substring(index + 1, indexOfEndBracket);
context.noteValueAsString = stringInBrackets;
context.isNumericNote = true;
logger.info(
"This note is a note represented by the dictionary value " + context.noteValueAsString);
return indexOfEndBracket + 1;
}
/**
* Returns the index with which to start parsing the next part of the string, once this method is
* done with its part
*/
private int parseNumericNote(String s, int index, NoteContext context) {
int numCharsInNumber = 0;
while (numCharsInNumber < s.length()
&& (s.charAt(index + numCharsInNumber) >= '0')
&& (s.charAt(index + numCharsInNumber) <= '9')) {
numCharsInNumber++;
}
String numericNoteString = s.substring(index, index + numCharsInNumber);
context.noteNumber = Byte.parseByte(numericNoteString);
context.isNumericNote = true;
logger.info("This note is a numeric note with value " + context.noteNumber);
return index + numCharsInNumber;
}
/**
* Returns the index with which to start parsing the next part of the string, once this method is
* done with its part
*/
private int parseLetterNote(String s, int index, NoteContext context) {
context.isNumericNote = false;
int originalIndex = index;
switch (s.charAt(index)) {
case 'C':
context.noteNumber = 0;
break;
case 'D':
context.noteNumber = 2;
break;
case 'E':
context.noteNumber = 4;
break;
case 'F':
context.noteNumber = 5;
break;
case 'G':
context.noteNumber = 7;
break;
case 'A':
context.noteNumber = 9;
break;
case 'B':
context.noteNumber = 11;
break;
default:
break;
}
index++;
// Check for #, b, or n (sharp, flat, or natural) modifier
boolean checkForModifiers = true;
while (checkForModifiers) {
if (index < s.length()) {
switch (s.charAt(index)) {
case '#':
index++;
context.noteNumber++;
if (context.noteNumber == 12) {
context.noteNumber = 0;
context.octaveBias++;
}
break;
case 'B':
index++;
context.noteNumber--;
if (context.noteNumber == -1) {
context.noteNumber = 11;
context.octaveBias--;
}
break;
case 'N':
index++;
context.isNatural = true;
checkForModifiers = false;
break;
default:
checkForModifiers = false;
break;
}
} else {
checkForModifiers = false;
}
}
context.originalString = s.substring(originalIndex, index);
logger.info(
"Note number within an octave (C=0, B=11): "
+ context.noteNumber
+ " (with octaveBias = "
+ context.octaveBias
+ ")");
return index;
}