@Override
public String toString() {
StringBuilder sb = new StringBuilder();
long r = period;
if (r < 0) {
sb.append('-');
r = -r;
}
TimePeriodUnit[] units = TimePeriodUnit.values();
int cnt = 0;
for (int i = units.length; --i >= 0; ) {
TimePeriodUnit unit = units[i];
long val = r / unit.period();
r %= unit.period();
boolean ms = unit == TimePeriodUnit.SECOND && r > 0;
if (val > 0 || ms) {
cnt++;
sb.append(val);
if (ms) sb.append('.').append(r / 100).append((r / 10) % 10).append(r % 10);
sb.append(unit.code());
}
}
if (cnt == 0) sb.append(r);
return sb.toString();
}
public static TimePeriod valueOf(String s) {
if (s == null) return new TimePeriod(0);
s = s.trim();
if (s.isEmpty()) return new TimePeriod(0);
long period = 0;
long mul = 1;
int i = 0;
if (s.startsWith("+")) i++;
else if (s.startsWith("-")) {
i++;
mul = -1;
}
TimePeriodUnit[] units = TimePeriodUnit.values();
int k = units.length - 1;
while (i < s.length()) {
int j = i;
while (j < s.length() && numChar(s.charAt(j))) j++;
double part = Double.parseDouble(s.substring(i, j));
if (j >= s.length()) {
period += part;
break;
}
while (k >= 0 && s.charAt(j) != units[k].code()) k--;
if (k < 0) throw new IllegalArgumentException("Invalid time period code: " + s.charAt(j));
period += part * units[k].period();
k--;
i = j + 1;
}
return valueOf(mul * period);
}
public static TimePeriod valueOf(long n, TimePeriodUnit unit) {
return new TimePeriod(n * unit.period());
}
