Re: How to do Lazy Foreign Keys?

[David Warnock]

Charles,

http://db.apache.org/ojb/tutorial3.html#using%20proxy%20classes
discusses the use of proxies in detail.

Yes and now on the nth reading it is starting to make sense. I had seen the proxy stuff for collections but missed it for singles.

Our Object model couldn't support that (not in a maintanable way), so what
we've done is to write a RelationshipHelper class that lazily loads a
relationship on demand.

We then implement the getter on the persistence class a bit like this :

public Country getCountry(){
   RelationshipHelper.lazyLoad(this,"country");
   return country;
}

This does sound quite interesting, it is code you would be able to share with the project. I think I can see places where it would be useful.

Dave
--
David Warnock, Sundayta Ltd. http://www.sundayta.com
iDocSys for Document Management. VisibleResults for Fundraising.
Development and Hosting of Web Applications and Sites.



---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]