Java Calendar Day dayIterable(Calendar from, Calendar to)

Description

returns an interable of canonical days in (inclusive) range of days

License

Apache License

Parameter

Parameter	Description
from	a parameter
to	a parameter

Declaration

public static Iterable<Calendar> dayIterable(Calendar from, Calendar to) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.Calendar;

import java.util.GregorianCalendar;
import java.util.Iterator;

public class Main {
    /**// w  ww.j a  v a2  s  . c  om
     * returns an interable of canonical days in (inclusive) range of days
     * @param from
     * @param to
     * @return
     */
    public static Iterable<Calendar> dayIterable(Calendar from, Calendar to) {
        final Calendar nextDay = getCanonicalDay(from);
        final Calendar upto = getCanonicalDay(to);
        return new Iterable<Calendar>() {
            public Iterator<Calendar> iterator() {
                return new Iterator<Calendar>() {
                    public boolean hasNext() {
                        return !nextDay.after(upto);
                    }

                    public Calendar next() {
                        Calendar ret = getCanonicalDay(nextDay);
                        nextDay.add(Calendar.DAY_OF_YEAR, 1);
                        return ret;
                    }

                    public void remove() {
                        //do nothing
                    }
                };
            }
        };
    }

    /**
     * Returns the canonical day calendar for a given calendar, which is the first millisecond of 
     * the day (2008/03/07 15:23:32 992ms --> 2008/03/07 0:0:0 0ms)
     * @param cal
     * @return 
     */
    public static Calendar getCanonicalDay(Calendar cal) {
        Calendar ret = new GregorianCalendar(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH),
                cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
        ret.set(Calendar.MILLISECOND, 0);
        ret.setTimeZone(cal.getTimeZone());
        return ret;
    }
}

Related

1. dayBegin(Calendar cal)
2. dayBegin(Calendar calendar)
3. dayDistance(Calendar date1, Calendar date2)
4. dayEndTime(Calendar calendar)
5. dayFloor(Calendar calendar)
6. dayMarkToCalendar(int day)
7. dayPrecision(Calendar calendar)
8. daysFromBinStart(Calendar date)
9. daysSinceTheJesus(Calendar cal)