In the following code; Types T, E are the same. But I cannot change E
to T as it won't compile, hence the explicit type cast in the
onSuccess method. Maybe there is a way to use the same generic type T
for the inner class ??? The different types make it difficult to read.
public abstract class HTMLGrid<T> extends Grid
implements IsSortable, IsFilterable {
protected class EntityCallback<E> implements AsyncCallback<E> {
public void onFailure(Throwable caught) {
setErrorMessage(caught.getMessage());
}
public void onSuccess(E result) {
int index = dataSet.indexOf(result);
if (index < 0) {
dataSet.add((T)result);
} else {
dataSet.set(index, (T)result);
}
}
}
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