Package it.unimi.dsi.fastutil.objects

Interface ObjectList<K>

All Superinterfaces:
Collection<K>, Comparable<List<? extends K>>, Iterable<K>, List<K>, ObjectCollection<K>, ObjectIterable<K>
All Known Implementing Classes:
AbstractObjectList, AbstractObjectList.ObjectSubList, ByteArrayFrontCodedList, CharArrayFrontCodedList, IntArrayFrontCodedList, LongArrayFrontCodedList, ObjectArrayList, ObjectLists.EmptyList, ObjectLists.Singleton, ObjectLists.SynchronizedList, ObjectLists.SynchronizedRandomAccessList, ObjectLists.UnmodifiableList, ObjectLists.UnmodifiableRandomAccessList, ShortArrayFrontCodedList
public interface ObjectList<K>
extends List<K>, Comparable<List<? extends K>>, ObjectCollection<K>
A type-specific List; provides some additional methods that use polymorphism to avoid (un)boxing.

Note that this type-specific interface extends Comparable: it is expected that implementing classes perform a lexicographical comparison using the standard operator "less then" for primitive types, and the usual compareTo() method for objects.

Additionally, this interface strengthens listIterator(), listIterator(int) and subList(int,int).

Besides polymorphic methods, this interfaces specifies methods to copy into an array or remove contiguous sublists. Although the abstract implementation of this interface provides simple, one-by-one implementations of these methods, it is expected that concrete implementation override them with optimized versions.

See Also:
List

  • Method Details

    • iterator

      ObjectListIterator<K> iterator()
      Returns a type-specific iterator on the elements of this list.

      Note that this specification strengthens the one given in List.iterator(). It would not be normally necessary, but Iterable.iterator() is bizarrily re-specified in List.

      Specified by:
      iterator in interface Collection<K>
      Specified by:
      iterator in interface Iterable<K>
      Specified by:
      iterator in interface List<K>
      Specified by:
      iterator in interface ObjectCollection<K>
      Specified by:
      iterator in interface ObjectIterable<K>
      Returns:
      an iterator on the elements of this list.
      See Also:
      Iterable.iterator()

    • listIterator

      ObjectListIterator<K> listIterator()
      Returns a type-specific list iterator on the list.
      Specified by:
      listIterator in interface List<K>
      See Also:
      List.listIterator()

    • listIterator

      ObjectListIterator<K> listIterator​(int index)
      Returns a type-specific list iterator on the list starting at a given index.
      Specified by:
      listIterator in interface List<K>
      See Also:
      List.listIterator(int)

    • subList

      ObjectList<K> subList​(int from, int to)
      Returns a type-specific view of the portion of this list from the index from, inclusive, to the index to, exclusive.

      Note that this specification strengthens the one given in List.subList(int,int).

      Specified by:
      subList in interface List<K>
      See Also:
      List.subList(int,int)

    • size

      void size​(int size)
      Sets the size of this list.

      If the specified size is smaller than the current size, the last elements are discarded. Otherwise, they are filled with 0/null/false.

      Parameters:
      size - the new size.

    • getElements

      void getElements​(int from, Object[] a, int offset, int length)
      Copies (hopefully quickly) elements of this type-specific list into the given array.
      Parameters:
      from - the start index (inclusive).
      a - the destination array.
      offset - the offset into the destination array where to store the first element copied.
      length - the number of elements to be copied.

    • removeElements

      void removeElements​(int from, int to)
      Removes (hopefully quickly) elements of this type-specific list.
      Parameters:
      from - the start index (inclusive).
      to - the end index (exclusive).

    • addElements

      void addElements​(int index, K[] a)
      Add (hopefully quickly) elements to this type-specific list.
      Parameters:
      index - the index at which to add elements.
      a - the array containing the elements.

    • addElements

      void addElements​(int index, K[] a, int offset, int length)
      Add (hopefully quickly) elements to this type-specific list.
      Parameters:
      index - the index at which to add elements.
      a - the array containing the elements.
      offset - the offset of the first element to add.
      length - the number of elements to add.

    • setElements

      default void setElements​(K[] a)
      Set (hopefully quickly) elements to match the array given.
      Parameters:
      a - the array containing the elements.
      Since:
      8.3.0

    • setElements

      default void setElements​(int index, K[] a)
      Set (hopefully quickly) elements to match the array given.
      Parameters:
      index - the index at which to start setting elements.
      a - the array containing the elements.
      Since:
      8.3.0

    • setElements

      default void setElements​(int index, K[] a, int offset, int length)
      Set (hopefully quickly) elements to match the array given. Sets each in this list to the corresponding elements in the array, as if by 
       
 ListIterator iter = listIterator(index);
 int i = 0;
 while (i < length) {
   iter.next();
   iter.set(a[offset + i++]);
 }
      However, the exact implementation may be more efficient, taking into account whether random access is faster or not, or at the discretion of subclasses, abuse internals.
      Parameters:
      index - the index at which to start setting elements.
      a - the array containing the elements
      offset - the offset of the first element to add.
      length - the number of elements to add.
      Since:
      8.3.0

    • unstableSort

      default void unstableSort​(Comparator<? super K> comparator)
      Sorts this list using a sort not assured to be stable. This differs from List.sort(java.util.Comparator) in that the results are not assured to be stable, but may be a bit faster.

      Unless a subclass specifies otherwise, the results of the method if the list is concurrently modified during the sort are unspecified.

      Since:
      8.3.0