it.unimi.dsi.fastutil.longs
Class Long2LongMaps.EmptyMap

java.lang.Object
  it.unimi.dsi.fastutil.longs.AbstractLong2LongFunction
      it.unimi.dsi.fastutil.longs.Long2LongFunctions.EmptyFunction
          it.unimi.dsi.fastutil.longs.Long2LongMaps.EmptyMap

All Implemented Interfaces:

Function<Long,Long>, Long2LongFunction, Long2LongMap, Serializable, Cloneable, Map<Long,Long>

Direct Known Subclasses:

Long2LongSortedMaps.EmptySortedMap

Enclosing class:

Long2LongMaps

public static class Long2LongMaps.EmptyMap
extends Long2LongFunctions.EmptyFunction
implements Long2LongMap, Serializable, Cloneable

An immutable class representing an empty type-specific map.

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

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.longs.Long2LongMap

Long2LongMap.Entry, Long2LongMap.FastEntrySet

Field Summary

static long

serialVersionUID

Method Summary

Object	clone()
boolean	containsValue(long v)
boolean	containsValue(Object ov)
ObjectSet<Map.Entry<Long,Long>>	entrySet() Returns a set view of the mappings contained in this map.
boolean	equals(Object o)
int	hashCode()
boolean	isEmpty()
LongSet	keySet() Returns a set view of the keys contained in this map.
ObjectSet<Long2LongMap.Entry>	long2LongEntrySet() Returns a type-specific set view of the mappings contained in this map.
void	putAll(Map<? extends Long,? extends Long> m)
String	toString()
LongCollection	values() Returns a set view of the values contained in this map.

Methods inherited from class it.unimi.dsi.fastutil.longs.Long2LongFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, get, get, size

Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2LongFunction

containsKey, put, put, remove, remove

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2LongFunction

containsKey, defaultReturnValue, defaultReturnValue, get, put, remove

Methods inherited from interface it.unimi.dsi.fastutil.Function

clear, containsKey, get, put, remove, size

Methods inherited from interface java.util.Map

clear, containsKey, get, put, remove, size

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

Method Detail

containsValue

public boolean containsValue(long v)

Specified by:

containsValue in interface Long2LongMap

See Also:

Map.containsValue(Object)

putAll

public void putAll(Map<? extends Long,? extends Long> m)

Specified by:

putAll in interface Map<Long,Long>

long2LongEntrySet

public ObjectSet<Long2LongMap.Entry> long2LongEntrySet()

Description copied from interface: Long2LongMap

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 Long2LongMap.entrySet() so that it returns an ObjectSet of objects of type Long2LongMap.Entry (the latter makes it possible to access keys and values with type-specific methods).

Specified by:

long2LongEntrySet in interface Long2LongMap

Returns:

a type-specific set view of the mappings contained in this map.

See Also:

Long2LongMap.entrySet()

keySet

public LongSet keySet()

Description copied from interface: Long2LongMap

Returns a set view of the keys contained in this map.

Note that this specification strengthens the one given in Map.keySet().

Specified by:

keySet in interface Long2LongMap

Specified by:

keySet in interface Map<Long,Long>

Returns:

a set view of the keys contained in this map.

See Also:

Map.keySet()

values

public LongCollection values()

Description copied from interface: Long2LongMap

Returns a set view of the values contained in this map.

Note that this specification strengthens the one given in Map.values().

Specified by:

values in interface Long2LongMap

Specified by:

values in interface Map<Long,Long>

Returns:

a set view of the values contained in this map.

See Also:

Map.values()

containsValue

public boolean containsValue(Object ov)

Specified by:

containsValue in interface Map<Long,Long>

clone

public Object clone()

Overrides:

clone in class Long2LongFunctions.EmptyFunction

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Long,Long>

entrySet

public ObjectSet<Map.Entry<Long,Long>> entrySet()

Description copied from interface: Long2LongMap

Returns a set view of the mappings contained in this map.

Note that this specification strengthens the one given in Map.entrySet().

Specified by:

entrySet in interface Long2LongMap

Specified by:

entrySet in interface Map<Long,Long>

Returns:

a set view of the mappings contained in this map.

See Also:

Map.entrySet()

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Long,Long>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Long,Long>

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object