----- Original Message -----
Sent: Wednesday, March 27, 2002 3:52
PM
Subject: Re: [castor-dev] about source
generator
hi
Annie,
just
a small remark on what you said about regenerating the java
files...
It
is a good idea to generate a new class for each class generated
by the 'source generator',
this
class typically encapsulates the generated one and implements the 'business
logic'.
I
got the idea from J2EE and EJB more specifically, where you have the notion of
entity beans and session beans.
In
short: the entity beans (in this case the auto-generated classes) are
responsible for the persistence (loading/saving/etc...) whereas the session
beans (in this case the classes you write yourself) handle the context
specific tasks.
This
allows regeneration of the auto-generated classes since you will never tough
them yourself. Small changes such as changes in cardinality of an element or
type of an attribute will therefore only need an update of the classes you
write yourself (you will first auto-generate everything again, and then patch
one not-auto-generated file)
I guess most people take this
approach.
ps: The classes I write myself each take their
respective auto-generated class as an argument in the constructor and
typically only have one other public method. This, however, is completely up
to the developer. It worked from the first time with me using Castor and I
must say I was VERY impressed by the result
(reusability/maintainability/stability/etc...)
good luck!
Wouter.
I
hope my explanation is clear enough...
ps:
It would be a very cool feature in Castor if the 'session beans' were also
generated using some kind om 'mapping' file or something. this would certainly
help a lot! Does anybody know if some request like this has been posted before
(I did not find it in the archives)
Hi, I'm a newbie of Castor. I want to use
Castor with Oracle to generate all value objects of tables. What steps
should I take? And How the source generator can help me to generate source
code?
Suppose I have add some code to the generated
java files, and in the further, I modify the table
definiation. What will happen if I re-generate the java
files? All the code I added will lost?
Thanks
Annie
