can I make a map super lazy ?

tombaeyens · **Posted:** Tue Feb 10, 2004 5:28 am

Hi,

If I'm correct collections that are mapped with

Code:

lazy="true"

are not loaded until needed. When needed they are loaded completely.

I want to specify a hibernate mapping for my java.util.Map property so that I can fetch only the needed objects with

Code:

myMap.get("myKey")

without fetching the complete map from the database. Is this possible with the hibernate provided lazy map implementation ? I realize this is not so obvious because the other methods such as

Code:

myMap.size()

should keep on working properly.

Thanks for your attention.

Regards, Tom.
http://jbpm.org

michael · **Posted:** Tue Feb 10, 2004 6:27 am

Use a proxy for the class.

emmanuel · **Posted:** Tue Feb 10, 2004 10:22 am

Proxying class will load the objects ids contained in the map when accessiong it and then load object 1 by 1. This is not exactly what you want I guess

tombaeyens · **Posted:** Tue Feb 10, 2004 10:28 am

No that is not what I want.

But I will try to write my own Map-implementation proxy. That should be doing the trick, right ?

Regards, Tom.

michael · **Posted:** Tue Feb 10, 2004 10:33 am

I don't think thats trivial, and certainly can't be done with just a custom map implementation (after all additions to the map have to be persistet, too, etc...)

There is a JIRA entry for this, you could vote on it. http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-24