如何在Android RecyclerView适配器中过滤后获取原始条目位置？

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<String> originalDataList; // 原始数据列表
    private List<String> filteredDataList; // 过滤后的数据列表

    public MyAdapter(List<String> dataList) {
        originalDataList = dataList;
        filteredDataList = new ArrayList<>();
    }

    public void filter(String keyword) {
        filteredDataList.clear();
        for (String data : originalDataList) {
            if (data.contains(keyword)) {
                filteredDataList.add(data);
            }
        }
        notifyDataSetChanged();
    }

    @Override
    public int getItemCount() {
        return filteredDataList.size();
    }

    @Override
    public String getItem(int position) {
        return filteredDataList.get(position);
    }

    public int getOriginalPosition(int filteredPosition) {
        String filteredData = filteredDataList.get(filteredPosition);
        return originalDataList.indexOf(filteredData);
    }

    // 其他必要的方法和实现省略...
}