igor.vaynberg wrote:
>
> class addressmodel extends ldm {
> private final int idx;
> private final imodel customer;
> public addressmodel(imodel customer, address address) {
> this.customer=customer;
> this.idx=customer.getaddresses().indexof(address);
> }
> ...
>
Nice. Thanks igor.
Wouldn't you care about the performance of List.indexOf()? What about using
just the index as a parameter instead of the adress? That would imply a
different IDataProvider like this:
public AdressDataProvider(IModel customerModel) {
this.customerModel = customerModel;
}
public Iterator<?> iterator(final int first, final int count) {
return new Iterator<Integer>() {
private int i;
public boolean hasNext() {
return i < first + count;
}
public Integer next() {
return i++;
}
public void remove() {
}
};
}
public IModel model(final Object object) {
final Integer index = (Integer) object;
return new AdressModel(customerModel, index);
}
Although kind of weird, this way you would not have to determine the index
by calling indexOf().
What do you think?
By the way, is there a shorter way of getting an iterator over an Integer
range?
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