Class GapList.ReadOnlyList<E>

All Implemented Interfaces:
Serializable, Cloneable, Iterable<E>, Collection<E>, List<E>, RandomAccess, SequencedCollection<E>, ICollection<E>, IListable<E>
Enclosing class:
GapList<E>

protected static class GapList.ReadOnlyList<E> extends GapList<E>
A read-only version of GapList. It is used to implement both unmodifiable and immutable lists. Note that the client cannot change the list, but the content may change if the underlying list is changed.
See Also:
  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      UID for serialization
      See Also:
  • Constructor Details

    • ReadOnlyList

      protected ReadOnlyList(GapList<E> that)
      Private constructor used internally.
      Parameters:
      that - list to create an immutable view of
  • Method Details

    • doAdd

      protected boolean doAdd(int index, E elem)
      Description copied from class: IList
      Helper method for adding an element to the list. This is the only method which really adds an element. Override if you need to validity checks before adding.
      Overrides:
      doAdd in class GapList<E>
      Parameters:
      index - index where element should be added (-1 means it is up to the implementation to choose the index)
      elem - element to add
      Returns:
      true if element has been added, false otherwise
    • doSet

      protected E doSet(int index, E elem)
      Description copied from class: IList
      Helper method for setting an element in the list. This is the only method which really sets an element. Override if you need to validity checks before setting.
      Overrides:
      doSet in class GapList<E>
      Parameters:
      index - index where element will be placed
      elem - element to set
      Returns:
      old element which was at the position
    • doReSet

      protected E doReSet(int index, E elem)
      Description copied from class: IList
      Sets an element at specified position. This method is used internally if existing elements will be moved etc. Override if you need to validity checks.
      Overrides:
      doReSet in class GapList<E>
      Parameters:
      index - index where element will be placed
      elem - element to set
      Returns:
      old element which was at the position
    • doRemove

      protected E doRemove(int index)
      Description copied from class: IList
      Helper method to remove an element. This is the only method which really removes an element. Override if you need to validity checks before removing.
      Overrides:
      doRemove in class GapList<E>
      Parameters:
      index - index of element to remove
      Returns:
      removed element
    • doRemoveAll

      protected void doRemoveAll(int index, int len)
      Description copied from class: IList
      Remove specified range of elements from list.
      Overrides:
      doRemoveAll in class GapList<E>
      Parameters:
      index - index of first element to remove
      len - number of elements to remove
    • doClear

      protected void doClear()
      Overrides:
      doClear in class GapList<E>
    • doModify

      protected void doModify()
      Description copied from class: IList
      This method is called internally before elements are allocated or freed. Override if you need to validity checks.
      Overrides:
      doModify in class IList<E>
    • error

      private void error()
      Throw exception if an attempt is made to change an immutable list.