I am using the below code in my application. But the data provider makes a
call to my service wrapper asking for all the entries. For example: if total
size of the list of 750, the first - 0 and count - 750. This is not
different from using list view. How can I make sure that this data view
loads (for example 100 entries) at a time. And when user scroll down the
list, we load more entries. Is it possible?
class UsersProvider implements IDataProvider
{
private static final long serialVersionUID = 1L;
public Iterator iterator(int first, int count)
{
Iterator<SerializableWorkflowInstancePartial> iterator =
null;
try {
iterator =
WorkflowServiceWrapper.listOpenActiveWorkflowInstances(
category, first, count);
} catch (DependencyFailureException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return iterator;
}
public int size()
{
return getProblemsCount();
}
public IModel model(final Object object)
{
return new LoadableDetachableModel() {
private static final long serialVersionUID = 1L;
protected Object load() {
return object;
}
};
}
@Override
public void detach() {
LOGGER.info("coming to detach");
// TODO Auto-generated method stub
}
}
DataView<SerializableWorkflowInstancePartial> dataview =
new DataView<SerializableWorkflowInstancePartial>("problems",
new UsersProvider()) {
private static final long serialVersionUID = 1L;
@Override
protected void populateItem(final Item item) {
Label blockedImage = new Label("blockedImage","");
if(((SerializableWorkflowInstancePartial)
item.getModelObject()).isBlocking()) {
//do something and add all ui compoenents
}
};
add(container);
container.add(dataview);
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