Populating JSF ListBox from DataBase

Question

Hi,
im new to JSF and i have a problem populating Listboxes with database values.
i have 3 listboxes and the 3 are populated from tables in my database.
I would like to filter the returned(from database) values in the 2nd listbox depending on the value selected in the 1st listox.
I dont know how to do this.
BTW i'm usis Ibatis Abator to map the database.
tnx

Answer 1

Here is what I think you are wanting to do:
1. Have the list box show values from a database table.
2. Have the user make selections. Should the user return to that page later in the session, have the previous selection still selected.
Normally, you would bind the listbox to the database table, as is shown in http://developers.sun.com/prodtech/javatools/jscreator/learning/tutorials/2/databoundcomponents.html. The only reason I can think of for not binding directly to the database table is if there is a possiblity that the database table can change (additions, updates, deletes) during the user's session.
Are you able to emulate the above tutorial using the Postgress database? It might be good to pinpoint whether the problem is with the Postgress driver or with the code you are writing.
By the way, if you use a data provider to access the database, as shown in the tutorial, here is how you iterate through the data
        try {
            myDataProvider.cursorFirst();
            do {
                [build your options list here]
            } while (myDataProvider.cursorNext());
        } catch (Exception ex) {
            error("put your message here" +
                    ex.getMessage());
            log("put your message here: " +
                    ex.getMessage(), ex);
        }You are correct to bind the selected property to a session bean property in order to perserve the user selecitons through the user's s session.