Collection types in generated Java code

julians37 · **Joined:** Wed Mar 17, 2010 11:10 pm **Posts:** 1

Hi,

I'm using hbm2java 3.2.3.GA. For collection fields my generated code looks like this:

Code:

    private Map<Integer,Foobar> foobars = new HashMap<Integer,Foobar>(0);

    public Map<Integer,Foobar> getFoobars() {
        return this.foobars;
    }
    
    public void setFoobars(Map<Integer,Foobar> foobars) {
        this.foobars = foobars;
    }

I would like to generate code like below instead, so that collections are always referenced using their concrete type (e.g. HashMap, LinkedList, TreeSet), not an abstract type (Map, List, Set):

Code:

    private HashMap<Integer,Foobar> foobars = new HashMap<Integer,Foobar>(0);

    public HashMap<Integer,Foobar> getFoobars() {
        return this.foobars;
    }
    
    public void setFoobars(HashMap<Integer,Foobar> foobars) {
        this.foobars = foobars;
    }

I know that hbm2java's default pattern - using abstract classes where possible - provides flexibility and is generally a good one, I'm using it myself all the time. However I don't need the flexibility in this case and the use of abstract classes incurs a performance hit to do with RPC serialization.

Is there a way to accomplish this without having to touch the hbm2x source code?

Apologies if this question was answered before.

Thank you,

Julian

max · **Posted:** Wed Mar 24, 2010 10:55 pm

1) these are interfaces and not abstract classes and how can that hurt the performance ?!

2) it wouldn't work with hibernate nor jpa entities so not sure what usecase this would ever be relevant ?