private void readObject(java.io.ObjectInputStream stream)
            throws java.io.IOException, ClassNotFoundException {

        stream.defaultReadObject();
        try {
            buildExpression(cronExpression);
        } catch (Exception ignore) {
        } // never happens
    }
Advance the calendar to the particular hour paying particular attention
to daylight saving problems.

@param cal the calendar to operate on
@param hour the hour to set
lts-core/src/main/java/com/github/ltsopensource/core/support/CronExpression.java