Added Collection setter in RVRendererAdapter

[tonilopezmr]

In some occasions when it creates a AdapteeCollection for RVRendererAdapter needs a RecyclerView.Adapter.

• Problem example using package android.support.v7.util.SortedList:

public MyAdapteeCollectionConstructor(RecyclerView.Adapter ANY_ADAPTER) {

    this.messageList = new SortedList<Message>(Message.class, new SortedListAdapterCallback<Message>(ANY_ADAPTER) {
            @Override
            public int compare(Message o1, Message o2) {
                return o1.compareTo(o2);
            }

            @Override
            public boolean areContentsTheSame(Message oldItem, Message newItem) {
                return oldItem.equals(newItem);
            }

            @Override
            public boolean areItemsTheSame(Message item1, Message item2) {
                return item1.getId().equals(item2.getId());
            }
        });
}

RVRendererAdapter creation:

adapter = new RVRendererAdapter<Message>(new MessageRenderBuilder(), new MyAdapteeCollection(WHAT ADAPTER?));

---

• Solution with actual Renderers version for this example:

public MyAdapteeCollectionConstructor() {
    //init default messageList
}

...

 public void initCollection(RecyclerView.Adapter adapter) {
        messageList = new SortedList<Message>(Message.class, new SortedListAdapterCallback<Message>(adapter) {
            @Override
            public int compare(Message o1, Message o2) {
                return o1.compareTo(o2);
            }

            @Override
            public boolean areContentsTheSame(Message oldItem, Message newItem) {
                return oldItem.equals(newItem);
            }

            @Override
            public boolean areItemsTheSame(Message item1, Message item2) {
                return item1.getId().equals(item2.getId());
            }
        });
    }

RVRendererAdapter creation:

adapteeCollection = new MyAdapteeCollection();
adapter = new RVRendererAdapter<Message>(new MessageRenderBuilder(), adapteeCollection);
adapteeCollection.initCollection(adapter);

---

• Solution with for this example (better solution?):

public MyAdapteeCollectionConstructor(RecyclerView.Adapter ANY_ADAPTER) { ... }

RVRendererAdapter creation:

adapter = new RVRendererAdapter<Message>(new MessageRenderBuilder());
adapter.setCollection(new MyAdapteeCollection(adapter));

[pedrovgs]

Instead of checking that the collection is not null, we should check that the number of items is 0. If the collection inside the RVRendererAdapeter is null is an implementation detail. We could implement the same behaviour using a null check so my recommendation is to update this test so something like:

@Test public void shouldBeEmptyWhenItsCreatedWithJustARendererBuilder() {
    RVRendererAdapter<Object> adapter = new RVRendererAdapter<Object>(mockedRendererBuilder);

    assertEquals(0, adapter.getCount());
}

[pedrovgs]

Hi @tonilopezmr thank you so much for your PR :) I've added some comments, please review them and let me know once the PR be ready.

[tonilopezmr]

Thanks you for all comments @pedrovgs

Maybe I would send more PR 👍

[tonilopezmr]

You know how to avoid that with Optimize imports? 😿

[pedrovgs]

Thank you so much @tonilopezmr. I'm merging this PR and publishing a new version :) If you want to add something to the library remember you can create an issue or send me an email.