Re: [Hibernate-devel] Dates + Times

[Gavin_King/Cirrus%<CI...@ci...>]

>if we had to copy them each time we took a
>snapshot then we would also need to create two new java.util.Calendars
each
>time we compared them (rather than using ==).

I realise this sounds really bad.... Actually the code to compare
dates/times looks something like:

if (x==y) return true;
Calendar c1 = Calendar.getInstance();
Calendar c12 = Calendar.getInstance();
c1.setTime(x);
c2.setTime(y);
........

So what I meant was: if you treat them as immutable + so don't take a copy
when you capture the snapshot state, you get a shortcut exit from that
section of code before you create the Calendars.

Now if only the stupid Calendar class would allow threadsafe usage eg:

calendar.get(Calendar.DAY, date)

then this wouldn't be an issue.....