Create a gist now

Instantly share code, notes, and snippets.

Embed

Original code developed by Robert LaThanh Modifications by Fred Grott, all under Apache License 2.0 Copyright (C) 2016

public abstract class AdaptableBindingAdapter<VM,
        AVM extends AdaptableViewModel<VM>,
        VH extends RecyclerView.ViewHolder>
        extends RecyclerView.Adapter<VH> {

  /**
   * Provide the item at the position. This allows the binding adapter to queue
   * up the item for adapting if it hasn't already been adapted.
   */
  protected abstract @NonNull AVM get(int position);

  /**
   * This override is for documentation only.
   *
   * <p>Implementations must:
   * <ol>
   *   <li>Fetch the item to be bound,</li>
   *   <li>If the {@link AdaptableViewModel#getViewModel() ViewModel
   *        within the AdaptableViewModel} is {@code null}, the item
   *        must be queued for adapting (if it isn't already), and</li>
   *   <li>Pass the item to {@link #onBindViewHolder(RecyclerView.ViewHolder, AdaptableViewModel, int)}</li>
   * </ol>
   * </p>
   *
   * @param holder {@inheritDoc}
   * @param position {@inheritDoc}
   */
  @Override
  public abstract void onBindViewHolder(@NonNull VH holder, int position);

  /**
   * Perform binding of the {@code adaptableViewModel} to the
   * View / (Loading)ViewHolder.
   *
   * @param adaptableViewModel the item at {@code position}, for
   *        convenience since the implementation already retrieved it (and
   *        since a unique method signature is needed).
   *        The {@link AdaptableViewModel#getViewModel() ViewModel
   *        within the adaptableViewModel} may be {@code null}.
   *        If it is, the implementation has already queued up the item for
   *        adapting in the background.
   */
  public abstract void onBindViewHolder(@NonNull final VH viewHolder,
                                        @NonNull AVM adaptableViewModel,
                                        int position);

}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment