public class CassandraPage<T> {
  private final int count;
  private final List<T> message;
  private final String pagingState;
  private final boolean hasNext;

  private final String prePagingState;
  private final boolean hasPreNext;

  public CassandraPage(final Slice<T> slice) {
    this.count = slice.getNumberOfElements();
    this.message = slice.getContent();
    this.pagingState = getPagingState(slice);
    this.hasNext = slice.hasNext();
    this.hasPreNext = slice.hasPrevious();
   this.pagingState = getPrePagingState(slice);
  }

  @Nullable
  private static <T> String getPagingState(final Slice<T> slice) {
    if (slice.hasNext()) {
      CassandraPageRequest cassandraPageRequest = (CassandraPageRequest) slice.nextPageable();
      ByteBuffer pagingState = cassandraPageRequest.getPagingState();
      return toHexString(pagingState);
    } else {
      return null;
    }
 }

  @Nullable
  private static <T> String getPrePagingState(final Slice<T> slice) {
    if (slice.hasPrevious()) {
      CassandraPageRequest cassandraPageRequest = (CassandraPageRequest) slice.previousPageable();
      ByteBuffer pagingState = cassandraPageRequest.getPagingState();
      return toHexString(pagingState);
    } else {
      return null;
    }
 }
}