I have a DataView on a page to list items returned by a DB query (using JPA).
My database object
(Customer) has LoadableDetachableModel class (called DetachableCustomerModel)
that the provider
returns via the model() method. When populating the table, I want a link to a
page for the details
of that object. The following code actually works, but throws a
WicketNotSerializableException
on my Customer class when the page is rendered:
final DataView<Customer> table_viewer = new
DataView<Customer>("customer_list", provider)
{
@Override
protected void populateItem(final Item<Customer> item)
{
final Customer customer = item.getModelObject();
item.add(new Label("id", String.valueOf(customer.getId())));
Link link = new Link("link")
{
@Override
public void onClick()
{
Debug.log.out("CustomerListPage.onClick() - customer: "
+ customer.getName());
setResponsePage(new CustomerPage(customer));
}
};
item.add(link);
link.add(new Label("name", customer.getName()));
String date_string = "";
Date date = customer.getLastActivity();
if (date != null) // TODO should this
really ever be null?
date_string = DateUtil.toSimpleDateString(date);
item.add(new Label("date", date_string));
}
};
>From what I understand, it SHOULD throw that exception, since the Customer
>came from JPA and
shouldn't be serialized. That is, I think, why the LoadableDetachableModel
exists. So, thinking
that I should be using the model instead, I tried this variation, but was
surprised to find
the same result.
final DataView<Customer> table_viewer = new
DataView<Customer>("customer_list", provider)
{
@Override
protected void populateItem(final Item<Customer> item)
{
final IModel<Customer> customer_model = item.getModel();
Customer customer = customer_model.getObject();
item.add(new Label("id", String.valueOf(customer.getId())));
Link link = new Link("link")
{
@Override
public void onClick()
{
Debug.log.out("CustomerListPage.onClick() - customer: "
+
customer_model.getObject().getName());
setResponsePage(new
CustomerPage(customer_model.getObject()));
}
};
item.add(link);
link.add(new Label("name", customer.getName()));
String date_string = "";
Date date = customer.getLastActivity();
if (date != null) // TODO should this
really ever be null?
date_string = DateUtil.toSimpleDateString(date);
item.add(new Label("date", date_string));
}
};
So I'm obviously missing something important about the right way to do this.
Can someone point me in the right direction?
TIA!
Chris
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Chris Merrill | Web Performance, Inc.
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919-433-1762 | 919-845-7601
Web Performance: Website Load Testing Software & Services
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