[jboss-user] [JBoss Seam] - Re: How to send a parameter with checkbox in JSF in order to
I guess you want to implement multiple selections in a datatable. I experienced this issue
a while ago and could only work around this problem with the following approach. Its
requires a bit of work but it works fine ....
The idea is to have an object as a view with the boolean variable representing the
selection status....
As such i have a Generic View
|
| public abstract class GenericView<T> {
|
| private boolean selected=new Boolean(false);
|
| private T persistentInstance;
|
| public boolean isSelected() {
| return selected;
| }
|
| public void setSelected(boolean isSelected) {
| this.selected = isSelected;
| }
|
| public T getPersistentInstance() {
| return persistentInstance;
| }
|
| public void setPersistentInstance(T persitentInstance) {
| this.persistentInstance = persitentInstance;
| }
| }
|
I then create a view specific for the object i want to use
| public class UserSelectionView extends GenericView<User> {
|
| }
|
And a Mapper class which will map the view to the object and vice versa as required :
| public abstract class UserViewMapper {
|
| public static User MapViewToUser(UserSelectionView view){
| return view.getPersistentInstance();
| }
|
| public static UserSelectionView MapUserToView(User user){
|
| UserSelectionView view = new UserSelectionView();
|
| view.setPersistentInstance(user);
| view.setSelected(false);
|
| return view;
| }
|
|
| }
|
|
In my SFSB, i then use the view as data model and a list of the object
| @DataModel
| private List<UserSelectionView> userViewListing = new
LinkedList<UserSelectionView>();
|
|
| @Factory("userViewListing")
| public void ListUserSelectionViews(){
|
| List<User> userList = userDAO.selectAll();
|
| for(User user:userList){
| userViewListing.add(UserViewMapper.MapUserToView(user));
| }
|
| }
|
|
| public void deleteSelectedUser(){
|
| for(UserSelectionView userView:userViewListing){
| if(userView.isSelected()){
| userDAO.remove(UserViewMapper.MapViewToUser(userView));
| }
| }
|
| }
|
Let me know how it goes ...
Cheers,
Jankee Yogesh
Software Developer
http://www.m-itc.net/
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