public class ProductDetails extends Panel {

	@EJB
	private ProductServicesLocal productServices;
	private Product product;


	public ProductDetails(String id, Product product) {
		super(id);
		setOutputMarkupId(true);
                this.theModel = new CompoundPropertyModel(product);
		add(new Label("id"));

		Form<Product> form = new Form<Product>("form", this.theModel);
		form.add(new AjaxEditableLabel<String>("codProduct"));
		add(new AjaxLink<String>("save") {
			@Override
			public void onClick(AjaxRequestTarget target) {
				System.out.println("saving product .... ");
			}
		});
		add(form);
	}

	public void setCurrentProduct(Product product) {
		this.theModel.setObject(product);
	}

}


This is from another component to update the panel:
		@Override
					public void onClick(AjaxRequestTarget target) {
						Product product = item.getModelObject();
						productDetails.setCurrentProduct(product);
						target.addComponent(productDetails);
						System.out.println(product.getId());
					}
				};
				item.add(link);