Framework: Add getItemAt(int rowIndex) method to DataProvider

[TatuLund]

DataProvider lacks a method to get Nth item. The implementation should be quite straightforward, something like:

public T getItemAt(int rowIndex) {
   Query<T,SerializablePredicate<T>> query = new Query<T,SerializablePredicate<T>>(rowIndex,1,null,null,null);
   Stream<T> result = dataProvider.fetch((Query<T, SerializablePredicate<T>>) query);
   T myBean = result.findFirst().get();
   return myBean;
}

[tsuoanttila]

Is the getItemAt supposed to be the index of an item with applied sorting and filtering from a component? If yes, then please upgrade to 8.2.0.alpha2 and use component.getDataCommunicator().fetchItemsWithRange(wantedIndex, 1). This will construct the correct query the same way as it's used in the component.

[stale[bot]]

Hello there!

It looks like this issue hasn't progressed lately. There are so many issues that we just can't deal them all within a reasonable timeframe.

There are a couple of things you could help to get things rolling on this issue (this is an automated message, so expect that some of these are already in use):

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Thanks again for your contributions! Even though we haven't been able to get this issue fixed, we hope you to report your findings and enhancement ideas in the future too!

[TatuLund]

See also https://github.com/vaadin/framework/issues/10935