Class ReferenceSortedSets.EmptySet<K>

java.lang.Object
All Implemented Interfaces:
ObjectBidirectionalIterable<K>, ObjectIterable<K>, ReferenceCollection<K>, ReferenceSet<K>, ReferenceSortedSet<K>, java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<K>, java.util.Collection<K>, java.util.Set<K>, java.util.SortedSet<K>
Enclosing class:
ReferenceSortedSets

public static class ReferenceSortedSets.EmptySet<K>
extends ReferenceSets.EmptySet<K>
implements ReferenceSortedSet<K>, java.io.Serializable, java.lang.Cloneable
An immutable class representing the empty sorted set and implementing a type-specific set interface.

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

See Also:
Serialized Form
  • Method Details

    • iterator

      public ObjectBidirectionalIterator<K> iterator​(K from)
      Description copied from interface: ReferenceSortedSet
      Returns a type-specific BidirectionalIterator on the elements in this set, starting from a given element of the domain (optional operation).

      This method returns a type-specific bidirectional iterator with given starting point. The starting point is any element comparable to the elements of this set (even if it does not actually belong to the set). The next element of the returned iterator is the least element of the set that is greater than the starting point (if there are no elements greater than the starting point, hasNext() will return false). The previous element of the returned iterator is the greatest element of the set that is smaller than or equal to the starting point (if there are no elements smaller than or equal to the starting point, hasPrevious() will return false).

      Note that passing the last element of the set as starting point and calling previous() you can traverse the entire set in reverse order.

      Specified by:
      iterator in interface ReferenceSortedSet<K>
      Parameters:
      from - an element to start from.
      Returns:
      a bidirectional iterator on the element in this set, starting at the given element.
    • subSet

      public ReferenceSortedSet<K> subSet​(K from, K to)
      Description copied from interface: ReferenceSortedSet
      Returns a view of the portion of this sorted set whose elements range from fromElement, inclusive, to toElement, exclusive.
      Specified by:
      subSet in interface ReferenceSortedSet<K>
      Specified by:
      subSet in interface java.util.SortedSet<K>
      See Also:
      SortedSet.subSet(Object,Object)
    • headSet

      public ReferenceSortedSet<K> headSet​(K from)
      Description copied from interface: ReferenceSortedSet
      Returns a view of the portion of this sorted set whose elements are strictly less than toElement.
      Specified by:
      headSet in interface ReferenceSortedSet<K>
      Specified by:
      headSet in interface java.util.SortedSet<K>
      See Also:
      SortedSet.headSet(Object)
    • tailSet

      public ReferenceSortedSet<K> tailSet​(K to)
      Description copied from interface: ReferenceSortedSet
      Returns a view of the portion of this sorted set whose elements are greater than or equal to fromElement.
      Specified by:
      tailSet in interface ReferenceSortedSet<K>
      Specified by:
      tailSet in interface java.util.SortedSet<K>
      See Also:
      SortedSet.tailSet(Object)
    • first

      public K first()
      Specified by:
      first in interface java.util.SortedSet<K>
    • last

      public K last()
      Specified by:
      last in interface java.util.SortedSet<K>
    • comparator

      public java.util.Comparator<? super K> comparator()
      Specified by:
      comparator in interface java.util.SortedSet<K>
    • clone

      public java.lang.Object clone()
      Overrides:
      clone in class ReferenceSets.EmptySet<K>