/*
* Databinder: a simple bridge from Wicket to Hibernate
* Copyright (C) 2006 Nathan Hamblen nathan@technically.us
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.databinder.models.cay;
import java.util.Iterator;
import java.util.List;
import net.databinder.cay.Databinder;
import net.databinder.models.PropertyDataProvider;
import org.apache.cayenne.DataObject;
import org.apache.cayenne.query.SelectQuery;
import org.apache.wicket.model.IModel;
/**
* IDataProvider implementation for Cayenne. Note that because Cayenne pagination
* is abstracted through a java.util.List, this provider has no performance advantage
* over a PageableListView with a page size set in the SelectQuery.
* @author Nathan Hamblen
*/
public class DataProvider extends PropertyDataProvider {
private SelectQuery query;
public DataProvider(SelectQuery query) {
this.query = query;
}
public List getList() {
return Databinder.getContext().performQuery(query);
}
public Iterator iterator(int first, int count) {
query.setPageSize(count);
return getList().subList(first, first + count).iterator();
}
public int size() {
return getList().size();
}
@Override
protected IModel dataModel(Object object) {
return new DataObjectModel((DataObject)object);
}
}