in x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/scheduler/Cron.java [880:1051]
private int storeExpressionVals(int pos, String s, int type) throws ElasticsearchParseException {
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") == false) && (s.equals("LW") == false) && (s.matches("^L-[0-9]*[W]?") == false)) {
String sub = s.substring(i, i + 3);
int sval = -1;
int eval = -1;
if (type == MONTH) {
sval = getMonthNumber(sub) + 1;
if (sval <= 0) {
throw illegalArgument("invalid Month value [{}] at pos [{}]", 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 illegalArgument("invalid Month value [{}] at pos [{}]", sub, i);
}
}
}
} else if (type == DAY_OF_WEEK) {
sval = getDayOfWeekNumber(sub);
if (sval < 0) {
throw illegalArgument("invalid Day-of-Week value [{}] at pos [{}]", sub, i);
}
if (s.length() > i + 3) {
c = s.charAt(i + 3);
if (c == '-') {
i += 4;
sub = s.substring(i, i + 3);
eval = getDayOfWeekNumber(sub);
if (eval < 0) {
throw illegalArgument("invalid Day-of-Week value [{}] at pos [{}]", sub, i);
}
} else if (c == '#') {
try {
i += 4;
nthdayOfWeek = Integer.parseInt(s.substring(i));
if (nthdayOfWeek < 1 || nthdayOfWeek > 5) {
throw new Exception();
}
} catch (Exception e) {
throw illegalArgument("a numeric value between 1 and 5 must follow the '#' option at pos [{}]", i);
}
} else if (c == 'L') {
lastdayOfWeek = true;
i++;
}
}
} else {
throw illegalArgument("illegal characters [{}] at pos [{}] '", sub, i);
}
if (eval != -1) {
incr = 1;
}
addToSet(sval, eval, incr, type);
return (i + 3);
}
if (c == '?') {
i++;
if ((i + 1) < s.length() && (s.charAt(i) != ' ' && s.charAt(i + 1) != '\t')) {
throw illegalArgument("illegal character [{}] after '?' at pos [{}]", s.charAt(i), i);
}
if (type != DAY_OF_WEEK && type != DAY_OF_MONTH) {
throw illegalArgument("'?' can only be specified for Day-of-Month or Day-of-Week. at pos [{}]", i);
}
if (type == DAY_OF_WEEK && lastdayOfMonth == false) {
int val = daysOfMonth.last();
if (val == NO_SPEC_INT) {
throw illegalArgument("'?' can only be specified for Day-of-Month -OR- Day-of-Week. at pos [{}]", i);
}
}
addToSet(NO_SPEC_INT, -1, 0, type);
return i;
}
if (c == '*' || c == '/') {
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 illegalArgument("'/' must be followed by an integer. at pos [{}]", i);
} else if (c == '*') {
i++;
}
c = s.charAt(i);
if (c == '/') { // is an increment specified?
i++;
if (i >= s.length()) {
throw illegalArgument("Unexpected end of string. at pos [{}]", i);
}
incr = getNumericValue(s, i);
i++;
if (incr > 10) {
i++;
}
if (incr > 59 && (type == SECOND || type == MINUTE)) {
throw illegalArgument("increment [{}] > 60 at pos [{}]", incr, i);
} else if (incr > 23 && (type == HOUR)) {
throw illegalArgument("increment [{}] > 24 at pos [{}]", incr, i);
} else if (incr > 31 && (type == DAY_OF_MONTH)) {
throw illegalArgument("increment [{}] > 31 at pos [{}] ", incr, i);
} else if (incr > 7 && (type == DAY_OF_WEEK)) {
throw illegalArgument("increment [{}] > 7 at pos [{}] ", incr, i);
} else if (incr > 12 && (type == MONTH)) {
throw illegalArgument("increment [{}] > 12 at pos [{}]", incr, i);
}
} else {
incr = 1;
}
addToSet(ALL_SPEC_INT, -1, incr, type);
return i;
} else if (c == '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 == '-') {
ValueSet vs = getValue(0, s, i + 1);
lastdayOffset = vs.value;
if (lastdayOffset > 30) throw illegalArgument("offset from last day must be <= 30 at pos [{}]", i + 1);
i = vs.pos;
}
if (s.length() > i) {
c = s.charAt(i);
if (c == 'W') {
nearestWeekday = true;
i++;
}
}
}
return i;
} else 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') {
ValueSet vs = getValue(val, s, i);
val = vs.value;
i = vs.pos;
}
i = checkNext(i, s, val, type);
return i;
}
} else {
throw illegalArgument("Unexpected character [{}] at pos [{}] ", c, i);
}
return i;
}