Hmm I have something similar, though not getting npe (from 1.3 project) :
/**
*
*
*/
public class SortableSearchDataProvider extends SortableDataProvider {
private SearchParameters searchParameters;
/**
* constructor
*/
public SortableSearchDataProvider(SearchParameters searchParameters) {
this.searchParameters=searchParameters;
// set default sort
setSort("alias", true);
InjectorHolder.getInjector().inject(this);
}
@SpringBean
private IDBDao dbDao;
protected IDBDao getDao() {
return dbDao;
}
/**
* @see
org.apache.wicket.markup.repeater.data.IDataProvider#iterator(int,
* int)
*/
public Iterator iterator(int first, int count) {
SortParam sp = getSort();
return getDao().searchForSchemes(first, count, sp.getProperty(),
sp.isAscending(),searchParameters)
.iterator();
}
/**
* @see org.apache.wicket.markup.repeater.data.IDataProvider#size()
*/
public int size() {
return getDao().searchForSchemesCount(searchParameters);
}
/**
* @see
org.apache.wicket.markup.repeater.data.IDataProvider#model(java.lang.Object)
*/
public IModel model(Object object) {
return new BaseEntityDetachableModel((Person) object);
}
}
2009/4/29 HHB <hubaghd...@yahoo.ca>:
>
> Actually, thats what I'm doing (you can check my code).
> The NPE is regarding the Group object instance, not Spring bean.
>
>
> Willis Blackburn wrote:
>>
>> Hi,
>>
>> The @SpringBean annotation is only resolved by Component and its
>> subclasses. (Actually it's resolved by SpringComponentInjector--but
>> that only works with components.)
>>
>> You can call InjectorHolder.getInjector().inject(whatever) to resolve
>> @SpringBean annotations in the whatever object.
>>
>> W
>>
>>
>>
>> On Apr 29, 2009, at 6:38 AM, HHB wrote:
>>
>>> Hey,
>>> I'm trying to employ DataTable in our application.
>>> *************************
>>> public class SortableContactDataProvider
>>> extends SortableDataProvider {
>>>
>>> �...@springbean
>>> private Service service;
>>>
>>> private Group group;
>>>
>>> public SortableContactDataProvider(Group group) {
>>> if (group == null)
>>> throw new IllegalStateException("Group is null");
>>> InjectorHolder.getInjector().inject(this);
>>> setSort("gsm", true);
>>> this.group = group;
>>> }
>>>
>>> public Iterator iterator(int first, int max) {
>>> return service.list(group, first, max,
>>> getSort().getProperty(),
>>> getSort().isAscending()).iterator();
>>> }
>>>
>>> public int size() {
>>> return service.listContactsSize(group);
>>> }
>>>
>>> public IModel model(Object object) {
>>> Contact contact = (Contact) object;
>>> return new DomainEntityModel<Contact>
>>> (Contact.class, contact.getId());
>>> }
>>>
>>> public void setGroup(Group group) {
>>> if (group == null)
>>> throw new IllegalStateException("Group is null");
>>> this.group = group;
>>> }
>>>
>>> }
>>> *************************
>>> And I use it this way (inside the panel constructor):
>>> *************************
>>> Group group = new Group();group.setId(1L);
>>> SortableContactDataProvider scdp = new
>>> SortableContactDataProvider(group);
>>> scdp.setGroup(group);
>>> final List<IColumn> columns = new ArrayList<IColumn>();
>>> columns.add(new PropertyColumn(new Model("GSM"), "gsm", "gsm"));
>>> AjaxFallbackDefaultDataTable contacts = new
>>> AjaxFallbackDefaultDataTable("table", columns, scdp, 10);
>>> final WebMarkupContainer wmc = new
>>> WebMarkupContainer("contactsTable");
>>> wmc.setOutputMarkupId(true);
>>> wmc.add(contacts);
>>> add(wmc);
>>> *************************
>>> When running the application, I got NullPointerException
>>> from the method size() of the provider, the group object is null.
>>> Why the object is null?
>>> and if it is null, why IllegalStateException is not being thrown?
>>> I'm using Wicket 1.3.5
>>> Thanks for help.
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
>>> For additional commands, e-mail: users-h...@wicket.apache.org
>>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
>> For additional commands, e-mail: users-h...@wicket.apache.org
>>
>>
>>
>
> --
> View this message in context:
> http://www.nabble.com/Why-I%27m-getting-NPE--tp23294732p23295098.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
> For additional commands, e-mail: users-h...@wicket.apache.org
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
