Thread: [Hibernate] Tom Cellucci's database reverse engineering tool

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Has everyone seen this:

http://66.218.140.50/tac/index.html

Its a tool to reverse engineer Hibernate mapping documents from the
database. Very nice (and a nice Swing UI.)

Awesome! I just pointed it at a MySQL database I had here and it worked 
great. Can't wait to see it cleaned up and put into CVS

I might try it against some more complex schema at work next week.

Can we move towards the "best practise" of having one mapping per class 
maybe?

Gavin King wrote:

>Has everyone seen this:
>
>http://66.218.140.50/tac/index.html
>
>Its a tool to reverse engineer Hibernate mapping documents from the
>database. Very nice (and a nice Swing UI.)
>
>
>
>
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> Can we move towards the "best practise" of having one mapping per class
> maybe?

Yeah, I already requested that (theres a thread in the forum).

P.S. Do I spell practice right? Should it be a 'c' or an 's'? I don't care
about US-style spelling or whatever, but there are two words, right, a verb
and a noun. Am I spelling the noun like the verb?

On Friday 08 November 2002 23:48, Gavin King wrote:
> > Can we move towards the "best practise" of having one mapping per class
> > maybe?
>
> Yeah, I already requested that (theres a thread in the forum).
>

But why is a best practice? One file per class requires, say, ten open editors 
to have a look at the whole mapping (A refers a B class, what is it?... 
we'll, let's open B.hbm.xml) and moreover you have more code to write...
Frankly I just see disadvantages in having more than a single mapping file...
Best regards
Andrea Aime

Theres a couple of considerations:

* When theres a large number of persistent classes, a single mapping
document becomes way to large, unmanageable and virtually impossible to
navigate. ie. the same reason why we don't define all our Java classes in
one big file. Plus, it keeps the mapping right there in the same directory
as the mapped class - easy to find and manage. I have had bad experiences
with things like the monolithic struts-config.xml

* In a team environment, multiple files tends to interact much better with
version control systems (not so much in the case of CVS, but certainly with
envy or any system based on locking).

Gavin

----- Original Message -----
From: "Andrea Aime" <aa...@li...>
To: "Gavin King" <ga...@ap...>; "Daniel Bradby"
<db...@bi...>; <hib...@li...>
Sent: Sunday, November 10, 2002 2:41 AM
Subject: Re: [Hibernate] Tom Cellucci's database reverse engineering tool

> On Friday 08 November 2002 23:48, Gavin King wrote:
> > > Can we move towards the "best practise" of having one mapping per
class
> > > maybe?
> >
> > Yeah, I already requested that (theres a thread in the forum).
> >
>
> But why is a best practice? One file per class requires, say, ten open
editors
> to have a look at the whole mapping (A refers a B class, what is it?...
> we'll, let's open B.hbm.xml) and moreover you have more code to write...
> Frankly I just see disadvantages in having more than a single mapping
file...
> Best regards
> Andrea Aime
>
>
> -------------------------------------------------------
> This sf.net email is sponsored by:ThinkGeek
> Welcome to geek heaven.
> http://thinkgeek.com/sf
> _______________________________________________
> hibernate-devel mailing list
> hib...@li...
> https://lists.sourceforge.net/lists/listinfo/hibernate-devel

Hey Gavin!
----- Original Message -----
From: "Gavin King" <ga...@ap...>
To: "Daniel Bradby" <db...@bi...>;
<hib...@li...>
Sent: Saturday, November 09, 2002 12:48 AM
Subject: Re: [Hibernate] Tom Cellucci's database reverse engineering tool

>
> > Can we move towards the "best practise" of having one mapping per class
> > maybe?
>
> Yeah, I already requested that (theres a thread in the forum).
>
> P.S. Do I spell practice right? Should it be a 'c' or an 's'? I don't care
> about US-style spelling or whatever, but there are two words, right, a
verb
> and a noun. Am I spelling the noun like the verb?

I think you can spell both the verb and the noun with 's' or 'c'
see http://www.m-w.com

regards
 chris
> -------------------------------------------------------
> This sf.net email is sponsored by: See the NEW Palm
> Tungsten T handheld. Power & Color in a compact size!
> http://ads.sourceforge.net/cgi-bin/redirect.pl?palm0001en
> _______________________________________________
> hibernate-devel mailing list
> hib...@li...
> https://lists.sourceforge.net/lists/listinfo/hibernate-devel
>

> I think you can spell both the verb and the noun with 's' or 'c'

Thanks for clearing that up :)

I was playing with your SchemaUpdater today (getting it working as a
commandline tool). I made a change to get it working with DB2 that I'm not
too happy about: I had to change the schema name to "%" instead of the
userName. Anyway, have a look and tell me if you can think of any better
idea.

Gavin

Thread: [Hibernate] Tom Cellucci's database reverse engineering tool

An object relational-mapping (ORM) library for Java

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