/*
* 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.components.hib;
import java.util.Iterator;
import net.databinder.models.hib.HibernateObjectModel;
import org.apache.wicket.markup.repeater.RefreshingView;
import org.apache.wicket.model.CompoundPropertyModel;
import org.apache.wicket.model.IModel;
/**
* Similar to a PropertyListView, but works with any Iterable collection composed of
* persisted entities. This is particularly useful for the common Hibernate set mapping, whose
* contents would otherwise need to be placed in a new List after loading. Contained items
* must be Hibernate entities; a Hibernate exeception will be thrown otherwise.
* @author Nathan Hamblen
*/
public abstract class IterableEntityView<T> extends RefreshingView<T> {
/**
* Contruct with externally bound model whose object must be Iterable.
* @param id
*/
public IterableEntityView(String id) {
super(id);
}
/**
* @param id Wicket id
* @param model Wrapped object must be Iterable.
*/
public IterableEntityView(String id, IModel<T> model) {
super(id, model);
}
@SuppressWarnings("unchecked")
@Override
protected final Iterator<IModel<T>> getItemModels() {
return new ModelIterator((Iterable<T>) getDefaultModelObject());
}
/**
* Wraps o in a HibernateObjectModel inside a BoundCompoundPropertyModel. Override
* if the compound property model is not desired.
* @param o object to be wrapped
* @return detachable model wrapping object
*/
protected IModel<T> model(T o) {
return new CompoundPropertyModel<T>(new HibernateObjectModel<T>(o));
}
private class ModelIterator implements Iterator<IModel<T>>
{
private Iterator<T> iterator;
public ModelIterator(Iterable<T> items)
{
if (items != null)
this.iterator = items.iterator();
}
public void remove()
{
throw new UnsupportedOperationException();
}
public boolean hasNext()
{
return iterator != null && iterator.hasNext();
}
public IModel<T> next()
{
return model(iterator.next());
}
}
}