/**
* Constructs a new <CODE>CronExpression</CODE> based on the specified parameter.
*
* @param cronExpression String representation of the cron expression the new object should
* represent
* @throws java.text.ParseException if the string expression cannot be parsed into a valid <CODE>
* CronExpression</CODE>
*/
public CronExpression(String cronExpression) throws ParseException {
if (cronExpression == null) {
throw new IllegalArgumentException(MSGS.cronExpressionNull());
}
this.cronExpression = cronExpression;
buildExpression(cronExpression.toUpperCase());
}
