Class TransformedList<E>

All Implemented Interfaces:
Serializable, Iterable<E>, Collection<E>, List<E>

public class TransformedList<E> extends TransformedCollection<E> implements List<E>
Decorates another List to transform objects that are added.

The add and set methods are affected by this class. Thus objects must be removed or searched for using their transformed form. For example, if the transformation converts Strings to Integers, you must use the Integer form to remove objects.

This class is Serializable from Commons Collections 3.1.

Since:
3.0
See Also:
  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      Serialization version
      See Also:
  • Constructor Details

    • TransformedList

      protected TransformedList(List<E> list, Transformer<? super E,? extends E> transformer)
      Constructor that wraps (not copies).

      If there are any elements already in the list being decorated, they are NOT transformed.

      Parameters:
      list - the list to decorate, must not be null
      transformer - the transformer to use for conversion, must not be null
      Throws:
      NullPointerException - if list or transformer is null
  • Method Details

    • transformingList

      public static <E> TransformedList<E> transformingList(List<E> list, Transformer<? super E,? extends E> transformer)
      Factory method to create a transforming list.

      If there are any elements already in the list being decorated, they are NOT transformed. Contrast this with transformedList(List, Transformer).

      Type Parameters:
      E - the type of the elements in the list
      Parameters:
      list - the list to decorate, must not be null
      transformer - the transformer to use for conversion, must not be null
      Returns:
      a new transformed list
      Throws:
      NullPointerException - if list or transformer is null
      Since:
      4.0
    • transformedList

      public static <E> TransformedList<E> transformedList(List<E> list, Transformer<? super E,? extends E> transformer)
      Factory method to create a transforming list that will transform existing contents of the specified list.

      If there are any elements already in the list being decorated, they will be transformed by this method. Contrast this with transformingList(List, Transformer).

      Type Parameters:
      E - the type of the elements in the list
      Parameters:
      list - the list to decorate, must not be null
      transformer - the transformer to use for conversion, must not be null
      Returns:
      a new transformed List
      Throws:
      NullPointerException - if list or transformer is null
      Since:
      4.0
    • getList

      protected List<E> getList()
      Gets the decorated list.
      Returns:
      the decorated list
    • equals

      public boolean equals(Object object)
      Specified by:
      equals in interface Collection<E>
      Specified by:
      equals in interface List<E>
      Overrides:
      equals in class Object
    • hashCode

      public int hashCode()
      Specified by:
      hashCode in interface Collection<E>
      Specified by:
      hashCode in interface List<E>
      Overrides:
      hashCode in class Object
    • get

      public E get(int index)
      Specified by:
      get in interface List<E>
    • indexOf

      public int indexOf(Object object)
      Specified by:
      indexOf in interface List<E>
    • lastIndexOf

      public int lastIndexOf(Object object)
      Specified by:
      lastIndexOf in interface List<E>
    • remove

      public E remove(int index)
      Specified by:
      remove in interface List<E>
    • add

      public void add(int index, E object)
      Specified by:
      add in interface List<E>
    • addAll

      public boolean addAll(int index, Collection<? extends E> coll)
      Specified by:
      addAll in interface List<E>
    • listIterator

      public ListIterator<E> listIterator()
      Specified by:
      listIterator in interface List<E>
    • listIterator

      public ListIterator<E> listIterator(int i)
      Specified by:
      listIterator in interface List<E>
    • set

      public E set(int index, E object)
      Specified by:
      set in interface List<E>
    • subList

      public List<E> subList(int fromIndex, int toIndex)
      Specified by:
      subList in interface List<E>