hongbeomi

// references : https://github.com/firebase/firebase-android-sdk/issues/1952#issuecomment-713094146
// error handling page
class ErrorActivity : AppCompatActivity() {

    companion object {

        private const val ERROR_TEXT = "ERROR_TEXT"

        fun start(context: Context, errorText: String) = with(context) {
            val intent = Intent(this, ErrorActivity::class.java).apply {

hongbeomi

private void releaseWrapperAndLocalPosition(
  WrapperAndLocalPosition wrapperAndLocalPosition
) {
  wrapperAndLocalPosition.mInUse = false;
  wrapperAndLocalPosition.mWrapper = null;
  wrapperAndLocalPosition.mLocalPosition = -1;
  mReusableHolder = wrapperAndLocalPosition;
}

hongbeomi

@NonNull
private WrapperAndLocalPosition findWrapperAndLocalPosition(
  int globalPosition
) {
  WrapperAndLocalPosition result;
  
  if (mReusableHolder.mInUse) {
    result = new WrapperAndLocalPosition();
  } else {
    mReusableHolder.mInUse = true;

hongbeomi

class ConcatAdapterController implements NestedAdapterWrapper.Callback {
  
  private WrapperAndLocalPosition mReusableHolder = new WrapperAndLocalPosition();
  
  static class WrapperAndLocalPosition {
    NestedAdapterWrapper mWrapper;
    int mLocalPosition;
    boolean mInUse;
  }
  

hongbeomi

class ConcatAdapterController implements NestedAdapterWrapper.Callback {

    ..
    public long getItemId(int globalPosition) {
        WrapperAndLocalPosition wrapperAndPos = findWrapperAndLocalPosition(globalPosition);
        Long globalItemId = wrapperAndPos.mWrapper.getItemId(wrapperAndPos.mLocalPosition);
        releaseWrapperAndLocalPosition(wrapperAndPos);
        return globalItemId;
    }
  ..

hongbeomi

class ConcatAdapterController implements NestedAdapterWrapper.Callback {

    ..
    public int getItemViewType(int globalPosition) {
        WrapperAndLocalPosition wrapperAndPos = findWrapperAndLocalPosition(globalPosition);
        int itemViewType = wrapperAndPos.mWrapper.getItemViewType(wrapperAndPos.mLocalPosition);
        releaseWrapperAndLocalPosition(wrapperAndPos);
        return itemViewType;
    }
    ..

hongbeomi

class NestedAdapterWrapper {

    @NonNull
    private final StableIdStorage.StableIdLookup mStableIdLookup;

    public long getItemId(int localPosition) {
        long localItemId = adapter.getItemId(localPosition);
        return mStableIdLookup.localToGlobal(localItemId);
    }

hongbeomi

class NestedAdapterWrapper {
    @NonNull
    private final ViewTypeStorage.ViewTypeLookup mViewTypeLookup;

    NestedAdapterWrapper(
        Adapter<ViewHolder> adapter,
        final Callback callback,
        ViewTypeStorage viewTypeStorage,
        StableIdStorage.StableIdLookup stableIdLookup
    ) {

hongbeomi

class NestedAdapterWrapper {

    int getItemViewType(int localPosition) {
        return mViewTypeLookup.localToGlobal(
            adapter.getItemViewType(localPosition)
        );
    }

}

hongbeomi

class ConcatAdapterController implements NestedAdapterWrapper.Callback {

    ...
    @NonNull
    private final ConcatAdapter.Config.StableIdMode mStableIdMode;
    ...

}