in log4j-core/src/main/java/org/apache/logging/log4j/core/util/CronExpression.java [507:688]
protected int storeExpressionVals(final int pos, final String s, final int type) throws ParseException {
int incr = 0;
int i = skipWhiteSpace(pos, s);
if (i >= s.length()) {
return i;
}
char c = s.charAt(i);
if ((c >= 'A') && (c <= 'Z') && (!s.equals("L")) && (!s.equals("LW")) && (!s.matches("^L-[0-9]*[W]?"))) {
String sub = s.substring(i, i + 3);
int sval = -1;
int eval = -1;
if (type == MONTH) {
sval = getMonthNumber(sub) + 1;
if (sval <= 0) {
throw new ParseException("Invalid Month value: '" + sub + "'", i);
}
if (s.length() > i + 3) {
c = s.charAt(i + 3);
if (c == '-') {
i += 4;
sub = s.substring(i, i + 3);
eval = getMonthNumber(sub) + 1;
if (eval <= 0) {
throw new ParseException("Invalid Month value: '" + sub + "'", i);
}
}
}
} else if (type == DAY_OF_WEEK) {
sval = getDayOfWeekNumber(sub);
if (sval < 0) {
throw new ParseException("Invalid Day-of-Week value: '" + sub + "'", i);
}
if (s.length() > i + 3) {
c = s.charAt(i + 3);
switch (c) {
case '-':
i += 4;
sub = s.substring(i, i + 3);
eval = getDayOfWeekNumber(sub);
if (eval < 0) {
throw new ParseException("Invalid Day-of-Week value: '" + sub + "'", i);
}
break;
case '#':
try {
i += 4;
nthdayOfWeek = Integers.parseInt(s.substring(i));
if (nthdayOfWeek < 1 || nthdayOfWeek > 5) {
throw new Exception();
}
} catch (final Exception e) {
throw new ParseException(
"A numeric value between 1 and 5 must follow the '#' option", i);
}
break;
case 'L':
lastdayOfWeek = true;
i++;
break;
default:
break;
}
}
} else {
throw new ParseException("Illegal characters for this position: '" + sub + "'", i);
}
if (eval != -1) {
incr = 1;
}
addToSet(sval, eval, incr, type);
return (i + 3);
}
switch (c) {
case '?':
i++;
if ((i + 1) < s.length() && (s.charAt(i) != ' ' && s.charAt(i + 1) != '\t')) {
throw new ParseException("Illegal character after '?': " + s.charAt(i), i);
}
if (type != DAY_OF_WEEK && type != DAY_OF_MONTH) {
throw new ParseException("'?' can only be specfied for Day-of-Month or Day-of-Week.", i);
}
if (type == DAY_OF_WEEK && !lastdayOfMonth) {
final int val = daysOfMonth.last();
if (val == NO_SPEC_INT) {
throw new ParseException("'?' can only be specfied for Day-of-Month -OR- Day-of-Week.", i);
}
}
addToSet(NO_SPEC_INT, -1, 0, type);
return i;
case '*':
case '/':
if (c == '*' && (i + 1) >= s.length()) {
addToSet(ALL_SPEC_INT, -1, incr, type);
return i + 1;
} else if (c == '/' && ((i + 1) >= s.length() || s.charAt(i + 1) == ' ' || s.charAt(i + 1) == '\t')) {
throw new ParseException("'/' must be followed by an integer.", i);
} else if (c == '*') {
i++;
}
c = s.charAt(i);
if (c == '/') { // is an increment specified?
i++;
if (i >= s.length()) {
throw new ParseException("Unexpected end of string.", i);
}
incr = getNumericValue(s, i);
i++;
if (incr > 10) {
i++;
}
if (incr > 59 && (type == SECOND || type == MINUTE)) {
throw new ParseException("Increment > 60 : " + incr, i);
} else if (incr > 23 && (type == HOUR)) {
throw new ParseException("Increment > 24 : " + incr, i);
} else if (incr > 31 && (type == DAY_OF_MONTH)) {
throw new ParseException("Increment > 31 : " + incr, i);
} else if (incr > 7 && (type == DAY_OF_WEEK)) {
throw new ParseException("Increment > 7 : " + incr, i);
} else if (incr > 12 && (type == MONTH)) {
throw new ParseException("Increment > 12 : " + incr, i);
}
} else {
incr = 1;
}
addToSet(ALL_SPEC_INT, -1, incr, type);
return i;
case 'L':
i++;
if (type == DAY_OF_MONTH) {
lastdayOfMonth = true;
}
if (type == DAY_OF_WEEK) {
addToSet(7, 7, 0, type);
}
if (type == DAY_OF_MONTH && s.length() > i) {
c = s.charAt(i);
if (c == '-') {
final ValueSet vs = getValue(0, s, i + 1);
lastdayOffset = vs.value;
if (lastdayOffset > 30) {
throw new ParseException("Offset from last day must be <= 30", i + 1);
}
i = vs.pos;
}
if (s.length() > i) {
c = s.charAt(i);
if (c == 'W') {
nearestWeekday = true;
i++;
}
}
}
return i;
default:
if (c >= '0' && c <= '9') {
int val = Integer.parseInt(String.valueOf(c));
i++;
if (i >= s.length()) {
addToSet(val, -1, -1, type);
} else {
c = s.charAt(i);
if (c >= '0' && c <= '9') {
final ValueSet vs = getValue(val, s, i);
val = vs.value;
i = vs.pos;
}
i = checkNext(i, s, val, type);
return i;
}
} else {
throw new ParseException("Unexpected character: " + c, i);
}
break;
}
return i;
}