Package it.unimi.dsi.fastutil.objects

Class Object2ReferenceSortedMaps.EmptySortedMap<K,​V>

java.lang.Object
it.unimi.dsi.fastutil.objects.AbstractObject2ReferenceFunction<K,​V>
it.unimi.dsi.fastutil.objects.Object2ReferenceFunctions.EmptyFunction<K,​V>
it.unimi.dsi.fastutil.objects.Object2ReferenceMaps.EmptyMap<K,​V>
it.unimi.dsi.fastutil.objects.Object2ReferenceSortedMaps.EmptySortedMap<K,​V>
All Implemented Interfaces:
it.unimi.dsi.fastutil.Function<K,​V>, it.unimi.dsi.fastutil.objects.Object2ReferenceFunction<K,​V>, Object2ReferenceMap<K,​V>, Object2ReferenceSortedMap<K,​V>, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<K,​V>, java.util.Map<K,​V>, java.util.SortedMap<K,​V>
Enclosing class:
Object2ReferenceSortedMaps
public static class Object2ReferenceSortedMaps.EmptySortedMap<K,​V>
extends Object2ReferenceMaps.EmptyMap<K,​V>
implements Object2ReferenceSortedMap<K,​V>, java.io.Serializable, java.lang.Cloneable
An immutable class representing an empty type-specific sorted map.

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

See Also:
Serialized Form

  • Method Details

    • comparator

      public java.util.Comparator<? super K> comparator()
      Description copied from interface: Object2ReferenceSortedMap
      Returns the comparator associated with this sorted set, or null if it uses its keys' natural ordering.
      Specified by:
      comparator in interface Object2ReferenceSortedMap<K,​V>
      Specified by:
      comparator in interface java.util.SortedMap<K,​V>
      See Also:
      SortedMap.comparator()

    • object2ReferenceEntrySet

      public it.unimi.dsi.fastutil.objects.ObjectSortedSet<Object2ReferenceMap.Entry<K,​V>> object2ReferenceEntrySet()
      Description copied from interface: Object2ReferenceMap
      Returns a type-specific set view of the mappings contained in this map.

      This method is necessary because there is no inheritance along type parameters: it is thus impossible to strengthen Map.entrySet() so that it returns an ObjectSet of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).

      Specified by:
      object2ReferenceEntrySet in interface Object2ReferenceMap<K,​V>
      Specified by:
      object2ReferenceEntrySet in interface Object2ReferenceSortedMap<K,​V>
      Overrides:
      object2ReferenceEntrySet in class Object2ReferenceMaps.EmptyMap<K,​V>
      Returns:
      a type-specific set view of the mappings contained in this map.
      See Also:
      Map.entrySet()

    • entrySet

      public it.unimi.dsi.fastutil.objects.ObjectSortedSet<java.util.Map.Entry<K,​V>> entrySet()
      Returns a sorted-set view of the mappings contained in this map.
      Specified by:
      entrySet in interface java.util.Map<K,​V>
      Specified by:
      entrySet in interface Object2ReferenceMap<K,​V>
      Specified by:
      entrySet in interface Object2ReferenceSortedMap<K,​V>
      Specified by:
      entrySet in interface java.util.SortedMap<K,​V>
      Returns:
      a sorted-set view of the mappings contained in this map.
      See Also:
      Map.entrySet()

    • keySet

      public it.unimi.dsi.fastutil.objects.ObjectSortedSet<K> keySet()
      Description copied from interface: Object2ReferenceMap
      Specified by:
      keySet in interface java.util.Map<K,​V>
      Specified by:
      keySet in interface Object2ReferenceMap<K,​V>
      Specified by:
      keySet in interface Object2ReferenceSortedMap<K,​V>
      Specified by:
      keySet in interface java.util.SortedMap<K,​V>
      Overrides:
      keySet in class Object2ReferenceMaps.EmptyMap<K,​V>
      Returns:
      a set view of the keys contained in this map.
      See Also:
      Map.keySet()

    • subMap

      public Object2ReferenceSortedMap<K,​V> subMap​(K from, K to)
      Description copied from interface: Object2ReferenceSortedMap
      Returns a view of the portion of this sorted map whose keys range from fromKey, inclusive, to toKey, exclusive.
      Specified by:
      subMap in interface Object2ReferenceSortedMap<K,​V>
      Specified by:
      subMap in interface java.util.SortedMap<K,​V>
      See Also:
      SortedMap.subMap(Object,Object)

    • headMap

      public Object2ReferenceSortedMap<K,​V> headMap​(K to)
      Description copied from interface: Object2ReferenceSortedMap
      Returns a view of the portion of this sorted map whose keys are strictly less than toKey.
      Specified by:
      headMap in interface Object2ReferenceSortedMap<K,​V>
      Specified by:
      headMap in interface java.util.SortedMap<K,​V>
      See Also:
      SortedMap.headMap(Object)

    • tailMap

      public Object2ReferenceSortedMap<K,​V> tailMap​(K from)
      Description copied from interface: Object2ReferenceSortedMap
      Returns a view of the portion of this sorted map whose keys are greater than or equal to fromKey.
      Specified by:
      tailMap in interface Object2ReferenceSortedMap<K,​V>
      Specified by:
      tailMap in interface java.util.SortedMap<K,​V>
      See Also:
      SortedMap.tailMap(Object)

    • firstKey

      public K firstKey()
      Specified by:
      firstKey in interface java.util.SortedMap<K,​V>

    • lastKey

      public K lastKey()
      Specified by:
      lastKey in interface java.util.SortedMap<K,​V>