时间字段在grails域类中

Question

I m working in a grails project. im using kendo grid in my application. i need to create a domain class named "StatTimings" which contains two time field startTime and endTime. I cant use "Date" data type for those two variable coz the time format i need is hh:mm. I dont want to install any plugin for this. this is my domain for now:

class StatTimings{

???? startTime
???? endTime
Date date
AutoPosting autoPosting
Status status

static constraints = {
}

enum Status{ACTIVE,INACTIVE}
enum AutoPosting{SERVICE_CHARGE,STAT_CHARGES,BOTH}

}

Is there any way I can make my field to accept time only?

Answer 1

To make it easy to persist and bind (from HTTP params) instances of this class, I'd represent each time as two integer fields and add some helper method like getStartTime() and getEndTime() . You might want to change these helpers to return a Date instead of a String (with the day part thereof set to today) if you need to do something like calculating the difference between the start and end time.

class StatTimings {

  static transients = ['startTime', 'endTime']

  Integer startHours
  Integer startMins

  Integer endHours
  Integer endMins

  private String formatTime(Integer hours, Integer mins) {
    String formattedHours = hours < 10 ? "0$hours" : hours.toString()
    String formattedMins = mins < 10 ? "0$mins" : mins.toString()
    "$formattedHours:$formattedMins"
  }

  String getStartTime() {
    formatTime(startHours, startMins)          
  }

  String getEndTime() {
    formatTime(endHours, endMins)
  }

  static constraints = {
    startHours range: 0..23
    endHours range: 0..23

    startMins range: 0..59
    endMins range: 0..59

    // TODO: add a custom validator that checks the end time is after start time
  }
}

Answer 2

You could use Date and convert it in the getStartTime() method to the format you need with the help of SimpleDateFormat . This way you ignore the date part of it.

class StatTimings {
    ...

    def getStartTime() {
        return new SimpleDateFormat("hh:mm").format(this.startTime);
    }

}

Answer 3

The java.sql.Time class subclasses java.util.Date and it makes almost the same thing and it adds a custom toString implementation as below :

public String toString () {

    int hour = super.getHours();
    int minute = super.getMinutes();
    int second = super.getSeconds();
    String hourString;
    String minuteString;
    String secondString;

    if (hour < 10) {
        hourString = "0" + hour;
    } else {        
        hourString = Integer.toString(hour);
    }
    if (minute < 10) {
        minuteString = "0" + minute;
    } else {        
        minuteString = Integer.toString(minute);
    }
    if (second < 10) {
        secondString = "0" + second;
    } else {        
        secondString = Integer.toString(second);
    }
    return (hourString + ":" + minuteString + ":" + secondString);
}

So I guess that you could add dynamically a method to Date class on bootstrap and invoke it when needed.

You can see the complete source here .