Re: [lang] Enhancement proposal for DateUtils

[Sean Schofield]

In the interest of full disclosure I also wanted to point out that code 
still assumes a Gregorian calendar.  It does not assume that a weekend is 
Saturday or Sunday which I think was the key concern earlier.

sean
----- Original Message ----- 
From: "Stephen Colebourne" <[EMAIL PROTECTED]>
To: "Jakarta Commons Developers List" <[EMAIL PROTECTED]>
Sent: Wednesday, September 22, 2004 6:11 PM
Subject: Re: [lang] Enhancement proposal for DateUtils


Joda-time has no handling for weekend style concepts at present.
Stephen
----- Original Message ----- 
From: "Gary Gregory" <[EMAIL PROTECTED]>
What does JODA time do, if anything about this?

Gary
-----Original Message-----
From: Sean Schofield [mailto:[EMAIL PROTECTED]
Sent: Wednesday, September 22, 2004 14:31
To: Jakarta Commons Developers List
Subject: Re: [lang] Enhancement proposal for DateUtils
OK,
I gave the weekend adjustment thing some thought.  What if we included
the
following methods?  (NOTE: javadoc, patches, and unit tests will be
provided
later if we go with this idea.)
Thoughts?
sean
    public static int[] SATURDAY_SUNDAY = {Calendar.SATURDAY,
Calendar.SUNDAY};
    public static Date adjustUntilNot(Date originalDate, int
dayOfWeek,
int
increment) {
        int[] dateArray = {dayOfWeek};
        return adjustUntilNot(originalDate, dateArray, increment);
    }
    public static Date adjustUntilNot(Date originalDate, int[]
daysOfWeek,
int increment) {
        Date adjustedDate = originalDate;
        Calendar calendar = new GregorianCalendar();
        while (fallsOn(adjustedDate, daysOfWeek)) {
            calendar.add(Calendar.DATE, increment);
            adjustedDate = calendar.getTime();
        }
        return adjustedDate;
    }
    public static boolean fallsOn(Date date, int dayToCheck) {
        int[] daysToCheck = {dayToCheck};
        return fallsOn(date, daysToCheck);
    }
    public static boolean fallsOn(Date date, int[] daysToCheck) {
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);
        int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        for (int i=0; i < daysToCheck.length; i++) {
            if (dayOfWeek == daysToCheck[i]) {
                return true;
            }
        }
        return false;
    }
----- Original Message -----
From: "Stephen Colebourne" <[EMAIL PROTECTED]>
To: "Jakarta Commons Developers List" <[EMAIL PROTECTED]>
Sent: Sunday, September 12, 2004 10:06 AM
Subject: Re: [lang] Enhancement proposal for DateUtils
> Its a point for debate really. It might be OK to define SatSun
weekends
as
> a
> default, but an API should probably be framed to allow the avoidance
of
> any
> day of week combination. And that can get to be a tricky API to
define.
>
> Stephen
>

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