Method subListImpl

corpus/java/training/guava/collect/Lists.java:1114–1138

An implementation of List#subList(int, int).

(final List<E> list, int fromIndex, int toIndex)

   * An implementation of {@link List#subList(int, int)}.
   */
  static <E> List<E> subListImpl(final List<E> list, int fromIndex, int toIndex) {
    List<E> wrapper;
    if (list instanceof RandomAccess) {
      wrapper =
          new RandomAccessListWrapper<E>(list) {
            @Override
            public ListIterator<E> listIterator(int index) {
              return backingList.listIterator(index);
            }

            private static final long serialVersionUID = 0;
          };
    } else {
      wrapper =
          new AbstractListWrapper<E>(list) {
            @Override
            public ListIterator<E> listIterator(int index) {
              return backingList.listIterator(index);
            }

            private static final long serialVersionUID = 0;
          };
    }
    return wrapper.subList(fromIndex, toIndex);
  }

  private static class AbstractListWrapper<E> extends AbstractList<E> {
    final List<E> backingList;