Lazy loading with the Grid component

A Grid component can take advantage of the offset and limit parameters described in the previous section by using the setDataProvider method, as follows:

grid.setDataProvider(
    (sortOrders, offset, limit) ->
            CallRepository.findAll(offset, limit).stream(),
    () -> CallRepository.count()
);

The previous code defines two lambda expressions:

• (sortOrders, offset, limit) -> service.find(...): This lambda expression should return all the items used in slice defined by the offset and limit parameters (we will see how to use the sortOrders parameters later)
• () -> service.count(): This lambda expression should return the total count of items available with no slices

The setDataProvider method we used in the previous example receives an instance of FetchItemsCallback, a functional interface that defines a method to fetch the items (or rows):

@FunctionalInterface
public interface FetchItemsCallback<T> extends Serializable {

public Stream...