Package it.unimi.dsi.fastutil.objects

Class ReferenceLists.EmptyList<K>

java.lang.Object
java.util.AbstractCollection<K>
it.unimi.dsi.fastutil.objects.AbstractReferenceCollection<K>
it.unimi.dsi.fastutil.objects.ReferenceCollections.EmptyCollection<K>
it.unimi.dsi.fastutil.objects.ReferenceLists.EmptyList<K>
All Implemented Interfaces:
it.unimi.dsi.fastutil.objects.ObjectIterable<K>, ReferenceCollection<K>, ReferenceList<K>, java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<K>, java.util.Collection<K>, java.util.List<K>, java.util.RandomAccess
Enclosing class:
ReferenceLists
public static class ReferenceLists.EmptyList<K>
extends ReferenceCollections.EmptyCollection<K>
implements ReferenceList<K>, java.util.RandomAccess, java.io.Serializable, java.lang.Cloneable
An immutable class representing an empty type-specific list.

This class may be useful to implement your own in case you subclass a type-specific list.

See Also:
Serialized Form

  • Method Summary

    Modifier and Type Method Description
    void add​(int index, K k)  
    boolean addAll​(int i, java.util.Collection<? extends K> c)  
    void addElements​(int index, K[] a)
    Add (hopefully quickly) elements to this type-specific list.
    void addElements​(int index, K[] a, int offset, int length)
    Add (hopefully quickly) elements to this type-specific list.
    java.lang.Object clone()  
    boolean equals​(java.lang.Object o)  
    K get​(int i)  
    void getElements​(int from, java.lang.Object[] a, int offset, int length)
    Copies (hopefully quickly) elements of this type-specific list into the given array.
    int hashCode()  
    int indexOf​(java.lang.Object k)  
    it.unimi.dsi.fastutil.objects.ObjectListIterator<K> iterator()
    Returns a type-specific iterator on the elements of this collection.
    int lastIndexOf​(java.lang.Object k)  
    it.unimi.dsi.fastutil.objects.ObjectListIterator<K> listIterator()
    Returns a type-specific list iterator on the list.
    it.unimi.dsi.fastutil.objects.ObjectListIterator<K> listIterator​(int i)
    Returns a type-specific list iterator on the list starting at a given index.
    K remove​(int i)  
    boolean remove​(java.lang.Object k)  
    void removeElements​(int from, int to)
    Removes (hopefully quickly) elements of this type-specific list.
    void replaceAll​(java.util.function.UnaryOperator<K> operator)  
    K set​(int index, K k)  
    void setElements​(int index, K[] a)
    Set (hopefully quickly) elements to match the array given.
    void setElements​(int index, K[] a, int offset, int length)
    Set (hopefully quickly) elements to match the array given.
    void setElements​(K[] a)
    Set (hopefully quickly) elements to match the array given.
    void size​(int s)
    Sets the size of this list.
    void sort​(java.util.Comparator<? super K> comparator)
    Sorts this list using a sort assured to be stable.
    ReferenceList<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.
    java.lang.String toString()  
    void unstableSort​(java.util.Comparator<? super K> comparator)
    Sorts this list using a sort not assured to be stable.

    Methods inherited from class it.unimi.dsi.fastutil.objects.ReferenceCollections.EmptyCollection

    addAll, clear, contains, containsAll, forEach, removeAll, removeIf, retainAll, size, spliterator, toArray, toArray

    Methods inherited from class java.util.AbstractCollection

    add, isEmpty

    Methods inherited from class java.lang.Object

    getClass, notify, notifyAll, wait, wait, wait

    Methods inherited from interface java.util.Collection

    parallelStream, removeIf, stream, toArray

    Methods inherited from interface java.lang.Iterable

    forEach

    Methods inherited from interface java.util.List

    add, addAll, clear, contains, containsAll, isEmpty, removeAll, retainAll, size, toArray, toArray

    Methods inherited from interface it.unimi.dsi.fastutil.objects.ReferenceList

    addAll, addAll, spliterator

  • Method Details

    • get

      public K get​(int i)
      Specified by:
      get in interface java.util.List<K>

    • remove

      public boolean remove​(java.lang.Object k)
      Specified by:
      remove in interface java.util.Collection<K>
      Specified by:
      remove in interface java.util.List<K>
      Overrides:
      remove in class java.util.AbstractCollection<K>

    • remove

      public K remove​(int i)
      Specified by:
      remove in interface java.util.List<K>

    • add

      public void add​(int index, K k)
      Specified by:
      add in interface java.util.List<K>

    • set

      public K set​(int index, K k)
      Specified by:
      set in interface java.util.List<K>

    • indexOf

      public int indexOf​(java.lang.Object k)
      Specified by:
      indexOf in interface java.util.List<K>

    • lastIndexOf

      public int lastIndexOf​(java.lang.Object k)
      Specified by:
      lastIndexOf in interface java.util.List<K>

    • addAll

      public boolean addAll​(int i, java.util.Collection<? extends K> c)
      Specified by:
      addAll in interface java.util.List<K>

    • replaceAll

      public void replaceAll​(java.util.function.UnaryOperator<K> operator)
      Specified by:
      replaceAll in interface java.util.List<K>

    • sort

      public void sort​(java.util.Comparator<? super K> comparator)
      Description copied from interface: ReferenceList
      Sorts this list using a sort assured to be stable.

      Pass null to sort using natural ordering.

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

      Specified by:
      sort in interface java.util.List<K>
      Specified by:
      sort in interface ReferenceList<K>

    • unstableSort

      public void unstableSort​(java.util.Comparator<? super K> comparator)
      Description copied from interface: ReferenceList
      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.

      Pass null to sort using natural ordering.

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

      Specified by:
      unstableSort in interface ReferenceList<K>

    • listIterator

      public it.unimi.dsi.fastutil.objects.ObjectListIterator<K> listIterator()
      Description copied from interface: ReferenceList
      Returns a type-specific list iterator on the list.
      Specified by:
      listIterator in interface java.util.List<K>
      Specified by:
      listIterator in interface ReferenceList<K>
      See Also:
      List.listIterator()

    • iterator

      public it.unimi.dsi.fastutil.objects.ObjectListIterator<K> iterator()
      Description copied from interface: ReferenceCollection
      Returns a type-specific iterator on the elements of this collection.
      Specified by:
      iterator in interface java.util.Collection<K>
      Specified by:
      iterator in interface java.lang.Iterable<K>
      Specified by:
      iterator in interface java.util.List<K>
      Specified by:
      iterator in interface it.unimi.dsi.fastutil.objects.ObjectIterable<K>
      Specified by:
      iterator in interface ReferenceCollection<K>
      Specified by:
      iterator in interface ReferenceList<K>
      Overrides:
      iterator in class ReferenceCollections.EmptyCollection<K>
      Returns:
      a type-specific iterator on the elements of this collection.

    • listIterator

      public it.unimi.dsi.fastutil.objects.ObjectListIterator<K> listIterator​(int i)
      Description copied from interface: ReferenceList
      Returns a type-specific list iterator on the list starting at a given index.
      Specified by:
      listIterator in interface java.util.List<K>
      Specified by:
      listIterator in interface ReferenceList<K>
      See Also:
      List.listIterator(int)

    • subList

      public ReferenceList<K> subList​(int from, int to)
      Description copied from interface: ReferenceList
      Returns a type-specific view of the portion of this list from the index from, inclusive, to the index to, exclusive.
      Specified by:
      subList in interface java.util.List<K>
      Specified by:
      subList in interface ReferenceList<K>
      See Also:
      List.subList(int,int)

    • getElements

      public void getElements​(int from, java.lang.Object[] a, int offset, int length)
      Description copied from interface: ReferenceList
      Copies (hopefully quickly) elements of this type-specific list into the given array.
      Specified by:
      getElements in interface ReferenceList<K>
      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

      public void removeElements​(int from, int to)
      Description copied from interface: ReferenceList
      Removes (hopefully quickly) elements of this type-specific list.
      Specified by:
      removeElements in interface ReferenceList<K>
      Parameters:
      from - the start index (inclusive).
      to - the end index (exclusive).

    • addElements

      public void addElements​(int index, K[] a, int offset, int length)
      Description copied from interface: ReferenceList
      Add (hopefully quickly) elements to this type-specific list.
      Specified by:
      addElements in interface ReferenceList<K>
      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.

    • addElements

      public void addElements​(int index, K[] a)
      Description copied from interface: ReferenceList
      Add (hopefully quickly) elements to this type-specific list.
      Specified by:
      addElements in interface ReferenceList<K>
      Parameters:
      index - the index at which to add elements.
      a - the array containing the elements.

    • setElements

      public void setElements​(K[] a)
      Description copied from interface: ReferenceList
      Set (hopefully quickly) elements to match the array given.
      Specified by:
      setElements in interface ReferenceList<K>
      Parameters:
      a - the array containing the elements.

    • setElements

      public void setElements​(int index, K[] a)
      Description copied from interface: ReferenceList
      Set (hopefully quickly) elements to match the array given.
      Specified by:
      setElements in interface ReferenceList<K>
      Parameters:
      index - the index at which to start setting elements.
      a - the array containing the elements.

    • setElements

      public void setElements​(int index, K[] a, int offset, int length)
      Description copied from interface: ReferenceList
      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.
      Specified by:
      setElements in interface ReferenceList<K>
      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.

    • size

      public void size​(int s)
      Description copied from interface: ReferenceList
      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.

      Specified by:
      size in interface ReferenceList<K>
      Parameters:
      s - the new size.

    • clone

      public java.lang.Object clone()

    • hashCode

      public int hashCode()
      Specified by:
      hashCode in interface java.util.Collection<K>
      Specified by:
      hashCode in interface java.util.List<K>
      Overrides:
      hashCode in class ReferenceCollections.EmptyCollection<K>

    • equals

      public boolean equals​(java.lang.Object o)
      Specified by:
      equals in interface java.util.Collection<K>
      Specified by:
      equals in interface java.util.List<K>
      Overrides:
      equals in class ReferenceCollections.EmptyCollection<K>

    • toString

      public java.lang.String toString()
      Overrides:
      toString in class AbstractReferenceCollection<K>