Re: can a WODisplayGroup use a subclass of an entity?
Re: can a WODisplayGroup use a subclass of an entity?
- Subject: Re: can a WODisplayGroup use a subclass of an entity?
- From: Marek Wawrzyczny <email@hidden>
- Date: Wed, 10 Sep 2003 10:10:20 +1000
What you need is to use the EOGenerator:
http://www.rubicode.com/Software/EOGenerator/
It comes with pretty good docs.
On Wednesday, Sep 10, 2003, at 09:30 Australia/Sydney, Denis Stanton
wrote:
I thought I had a good idea to clean up my code a bit, but it's not
working. Maybe the idea was flawed, or maybe I'm just missing a
detail.
I have an entity (Holiday) that represents a holiday reservation.
There are a number of common operations I need to perform on instances
of this entity. For example, the table stores start and finish date
and I frequently need to calculate duration by subtracting one from the
other.
To do this I simply added a public int duration(){...} method to
Holiday.java. I have added a number of methods like this. My worry is
I am still developing the database and every time I extend the entity
definition I generate the java class again. I have to be very careful
to merge the generated code with my extended class. I'm worried that I
could slip up and lose my custom code. It finally dawned on me that I
was not making use of Java inheritance. Instead of adding methods to
Holiday.java I should define public class HolidayExt extends Holiday
{...} and add my custom code there. Then in my WOComponents I always
declare instance to be HolidayExt holidayItem = new HolidayExt()
Marek Wawrzyczny
software engineer
-------------------------->
ish group pty ltd
7 Darghan St Glebe 2037 Australia
phone +61 2 9660 1400 fax +61 2 9660 7400
http www.ish.com.au | email email@hidden
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