The ZonedDateTime is an immutable representation of a date-time with a time-zone, introduced in Java 8. This class stores all date and
time fields, to a precision of nanoseconds, and a time zone, with a zone offset used to handle ambiguous local date times.
Date truncation to a specific time unit means setting the values up to the specific time unit to zero while keeping the values of the larger time
units unchanged.
The ZonedDateTime class provides a truncatedTo method that allows truncating the date in a significantly faster way than
the DateUtils class from Commons Lang.
Note that this rule is automatically disabled when the project’s sonar.java.source is lower than 8.
Noncompliant code example
public Date trunc(Date date) {
return DateUtils.truncate(date, Calendar.SECOND); // Noncompliant
}
Compliant solution
public Date trunc(Date date) {
Instant instant = date.toInstant();
ZonedDateTime zonedDateTime = instant.atZone(ZoneId.systemDefault());
ZonedDateTime truncatedZonedDateTime = zonedDateTime.truncatedTo(ChronoUnit.SECONDS);
Instant truncatedInstant = truncatedZonedDateTime.toInstant();
return Date.from(truncatedInstant);
}
