Wicket Filter form using Dataview/IDataProvider

[Fernando Sproviero]

Hi,

I'm listing some objects in a page using Dataview, DataProvider and LoadableDetachableModel.
I'm planning to add a form filter with some input boxes and a Filter button.
I was thinking on modifying somehow the DataProvider, and also the dao.
However, I'm not sure what is the best approach to pass the parameters to the DataProvider. Should I use a model?
Please can you advice?

Thanks.

[Pragya Rawal]

Hi,

Could you find solution to this ? If yes, please share that.
I also have a similar requirement.

Thanks

[Fernando Sproviero]

Hi, I ended creating a class that implements IDataProvider.
Inside this class I have some properties:
-Service (could also be a DAO)
-filter properties.
-methods:

public 	class GenericDataProvider<T extends DomainObject> implements IDataProvider<T>
{
	protected Service<T> service;
	protected Object filterParam1;
	protected Object filterParam2;

	public GenericDataProvider(Object filterParam1, Object filterParam2, Service<T> service) {
		this.service = service;
		this.filterParam1=filterParam1;
		this.filterParam2=filterParam2;
	}

	@Override
	public Iterator<T> iterator(int first, int count) {
		return service.findAll(first, count, filterParam1,filterParam2).iterator();
	}

	@Override
	public int size() {
		return service.countAll(filterParam1,filterParam2);
	}

	@Override
	public IModel<T> model(T object) {
		return new GenericDetachableModel<T>(object, service);
	}

	@Override
	public void detach() {
	}
}

And GenericDetachableModel:

public class GenericDetachableModel<T extends DomainObject> extends LoadableDetachableModel<T> {
	private final long id;
	private final Service<T> service;
	
	public GenericDetachableModel(T object, Service<T> service) {
		this(object, object.getId(), service);
	}
	
	private GenericDetachableModel(T object, long id, Service<T> service) {
		super(object);
		if (id == 0) {
			throw new IllegalArgumentException();
		}
		this.id = id;
		this.service = service;
	}
	
	@Override
	protected T load() {
		return (T) service.find(id);
	}
}

When the GenericDataProvider class is constructed, I pass the service (or dao) and the filter params.
Hope this helps.