Dynamic Model: using a different Map?

wchen · **Joined:** Thu May 13, 2004 7:47 pm **Posts:** 11

I like the "Dynamic Model" feature in Hibernate 3.0.

However, it seems Hibernate assumes the dynamic model is a HashMap in the implementation (see DynamicInstantiator). My question is if I can use my own implementation of Map?

Thanks.

- Wei Chen

emmanuel · **Posted:** Thu Mar 31, 2005 7:06 pm

You can't AFAIK. What is your use case?

wchen · **Joined:** Thu May 13, 2004 7:47 pm **Posts:** 11

emmanuel wrote:

You can't AFAIK. What is your use case?

There are many use cases:

1. I want a faster implementation of Map than HashMap
2. I want additional processing around get/put operation such as have default values for certain field
3. I want additional domain semantics on this Map:

Code:

    class DomainObject implements Map {
       ... standard Map methods such as get/put ....
       .... other domain methods ....
    }

Thanks.

- Wei Chen

steve · **Posted:** Thu Mar 31, 2005 11:16 pm

The "hooks" are there (i.e., the Instantiator interface) but we have just not yet exposed this for configuration. Add a JIRA enhancement request.

wchen · **Joined:** Thu May 13, 2004 7:47 pm **Posts:** 11

steve wrote:

The "hooks" are there (i.e., the Instantiator interface) but we have just not yet exposed this for configuration. Add a JIRA enhancement request.

I guess no short-term workaround available, is there?

steve · **Posted:** Thu Mar 31, 2005 11:23 pm

Aside from changing the Hibernate source yourself, no; until we expose the ability for users to configure the various instantiators to be used.