Java Trigger: Determining Next Execution Time

public Date nextExecutionTime(TriggerContext triggerContext) { Date lastCompletionTime = triggerContext.lastCompletionTime(); Date lastScheduledExecutionTime = triggerContext.lastScheduledExecutionTime(); Date lastActualExecutionTime = triggerContext.lastActualExecutionTime();

 Date nextExecutionTime = this.nextExecutionTime(triggerContext.getTrigger());
 
 if (nextExecutionTime != null && lastCompletionTime != null) {
     Assert.isTrue(nextExecutionTime.getTime() >= lastCompletionTime.getTime(),
             'Date returned from nextExecutionTime must not be earlier than lastCompletionTime');
 }
 
 return nextExecutionTime;

}