Package it.unimi.dsi.fastutil.longs

Class Long2ReferenceMaps.UnmodifiableMap<V>

java.lang.Object

it.unimi.dsi.fastutil.longs.AbstractLong2ReferenceFunction<V>

it.unimi.dsi.fastutil.longs.Long2ReferenceFunctions.UnmodifiableFunction<V>

it.unimi.dsi.fastutil.longs.Long2ReferenceMaps.UnmodifiableMap<V>

All Implemented Interfaces:

Function<Long,V>, Long2ReferenceFunction<V>, Long2ReferenceMap<V>, Serializable, Function<Long,V>, LongFunction<V>, Map<Long,V>

Direct Known Subclasses:

Long2ReferenceSortedMaps.UnmodifiableSortedMap

Enclosing class:

Long2ReferenceMaps

public static class Long2ReferenceMaps.UnmodifiableMap<V>
extends Long2ReferenceFunctions.UnmodifiableFunction<V>
implements Long2ReferenceMap<V>, Serializable

An unmodifiable wrapper class for maps.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.longs.Long2ReferenceMap

Long2ReferenceMap.Entry<V>, Long2ReferenceMap.FastEntrySet<V>

Method Summary

Modifier and Type	Method	Description
V	compute(long key, BiFunction<? super Long,? super V,? extends V> remappingFunction)	Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
V	compute(Long key, BiFunction<? super Long,? super V,? extends V> remappingFunction)	Deprecated. Please use the corresponding type-specific method instead.
V	computeIfAbsent(long key, Long2ReferenceFunction<? extends V> mappingFunction)	If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map, unless the key is not present in the given mapping function.
V	computeIfAbsent(long key, LongFunction<? extends V> mappingFunction)	If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map.
V	computeIfAbsent(Long key, Function<? super Long,? extends V> mappingFunction)	Deprecated. Please use the corresponding type-specific method instead.
V	computeIfPresent(long key, BiFunction<? super Long,? super V,? extends V> remappingFunction)	If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.
V	computeIfPresent(Long key, BiFunction<? super Long,? super V,? extends V> remappingFunction)	Deprecated. Please use the corresponding type-specific method instead.
boolean	containsValue(Object v)
ObjectSet<Map.Entry<Long,V>>	entrySet()	Deprecated. Please use the corresponding type-specific method instead.
boolean	equals(Object o)
void	forEach(BiConsumer<? super Long,? super V> action)
V	getOrDefault(long key, V defaultValue)	Returns the value associated by this function to the specified key, or give the specified value if not present.
V	getOrDefault(Object key, V defaultValue)	Deprecated. Please use the corresponding type-specific method instead.
int	hashCode()
boolean	isEmpty()
LongSet	keySet()
ObjectSet<Long2ReferenceMap.Entry<V>>	long2ReferenceEntrySet()	Returns a type-specific set view of the mappings contained in this map.
V	merge(long key, V value, BiFunction<? super V,? super V,? extends V> remappingFunction)	If the specified key is not already associated with a value, associates it with the given value.
V	merge(Long key, V value, BiFunction<? super V,? super V,? extends V> remappingFunction)	Deprecated. Please use the corresponding type-specific method instead.
void	putAll(Map<? extends Long,? extends V> m)
V	putIfAbsent(long key, V value)	If the specified key is not already associated with a value, associates it with the given value and returns the default return value, else returns the current value.
V	putIfAbsent(Long key, V value)	Deprecated. Please use the corresponding type-specific method instead.
boolean	remove(long key, Object value)	Removes the entry for the specified key only if it is currently mapped to the specified value.
boolean	remove(Object key, Object value)	Deprecated. Please use the corresponding type-specific method instead.
V	replace(long key, V value)	Replaces the entry for the specified key only if it is currently mapped to some value.
boolean	replace(long key, V oldValue, V newValue)	Replaces the entry for the specified key only if currently mapped to the specified value.
V	replace(Long key, V value)	Deprecated. Please use the corresponding type-specific method instead.
boolean	replace(Long key, V oldValue, V newValue)	Deprecated. Please use the corresponding type-specific method instead.
void	replaceAll(BiFunction<? super Long,? super V,? extends V> function)
ReferenceCollection<V>	values()

Methods inherited from class it.unimi.dsi.fastutil.longs.Long2ReferenceFunctions.UnmodifiableFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, get, get, put, put, remove, remove, size, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

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

apply

Methods inherited from interface java.util.function.Function

andThen

Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2ReferenceFunction

andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, apply, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, put, remove

Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2ReferenceMap

clear, computeIfAbsentPartial, containsKey, containsKey, defaultReturnValue, defaultReturnValue, get, put, remove, size

Method Details

containsValue

public boolean containsValue(Object v)

Specified by:

containsValue in interface Map<Long,V>

putAll

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

Specified by:

putAll in interface Map<Long,V>

long2ReferenceEntrySet

public ObjectSet<Long2ReferenceMap.Entry<V>> long2ReferenceEntrySet()

Description copied from interface: Long2ReferenceMap

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:

long2ReferenceEntrySet in interface Long2ReferenceMap<V>

Returns:

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

See Also:

• Map.entrySet()

entrySet

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

Deprecated.

Please use the corresponding type-specific method instead.

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

Specified by:

entrySet in interface Long2ReferenceMap<V>

Specified by:

entrySet in interface Map<Long,V>

Returns:

a set view of the mappings contained in this map.

See Also:

• Map.entrySet()

keySet

public LongSet keySet()

Description copied from interface: Long2ReferenceMap

Specified by:

keySet in interface Long2ReferenceMap<V>

Specified by:

keySet in interface Map<Long,V>

Returns:

a set view of the keys contained in this map.

See Also:

• Map.keySet()

values

public ReferenceCollection<V> values()

Description copied from interface: Long2ReferenceMap

Specified by:

values in interface Long2ReferenceMap<V>

Specified by:

values in interface Map<Long,V>

Returns:

a set view of the values contained in this map.

See Also:

• Map.values()

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Long,V>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Long,V>

Overrides:

hashCode in class Long2ReferenceFunctions.UnmodifiableFunction<V>

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Long,V>

Overrides:

equals in class Long2ReferenceFunctions.UnmodifiableFunction<V>

getOrDefault

public V getOrDefault(long key,
 V defaultValue)

Description copied from interface: Long2ReferenceFunction

Returns the value associated by this function to the specified key, or give the specified value if not present.

Specified by:

getOrDefault in interface Long2ReferenceFunction<V>

Specified by:

getOrDefault in interface Long2ReferenceMap<V>

Overrides:

getOrDefault in class Long2ReferenceFunctions.UnmodifiableFunction<V>

Parameters:

key - the key.

defaultValue - the value to return if not present.

Returns:

the corresponding value, or defaultValue if no value was present for the given key.

See Also:

• Function.getOrDefault(Object, Object)

forEach

public void forEach(BiConsumer<? super Long,? super V> action)

Specified by:

forEach in interface Long2ReferenceMap<V>

Specified by:

forEach in interface Map<Long,V>

replaceAll

public void replaceAll(BiFunction<? super Long,? super V,? extends V> function)

Specified by:

replaceAll in interface Map<Long,V>

putIfAbsent

public V putIfAbsent(long key,
 V value)

Description copied from interface: Long2ReferenceMap

If the specified key is not already associated with a value, associates it with the given value and returns the default return value, else returns the current value.

Specified by:

putIfAbsent in interface Long2ReferenceMap<V>

Parameters:

key - key with which the specified value is to be associated.

value - value to be associated with the specified key.

Returns:

the previous value associated with the specified key, or the default return value if there was no mapping for the key.

See Also:

• Map.putIfAbsent(Object, Object)

remove

public boolean remove(long key,
 Object value)

Description copied from interface: Long2ReferenceMap

Removes the entry for the specified key only if it is currently mapped to the specified value.

Specified by:

remove in interface Long2ReferenceMap<V>

Parameters:

key - key with which the specified value is associated.

value - value expected to be associated with the specified key.

Returns:

true if the value was removed.

See Also:

• Map.remove(Object, Object)

replace

public V replace(long key,
 V value)

Description copied from interface: Long2ReferenceMap

Replaces the entry for the specified key only if it is currently mapped to some value.

Specified by:

replace in interface Long2ReferenceMap<V>

Parameters:

key - key with which the specified value is associated.

value - value to be associated with the specified key.

Returns:

the previous value associated with the specified key, or the default return value if there was no mapping for the key.

See Also:

• Map.replace(Object, Object)

replace

public boolean replace(long key,
 V oldValue,
 V newValue)

Description copied from interface: Long2ReferenceMap

Replaces the entry for the specified key only if currently mapped to the specified value.

Specified by:

replace in interface Long2ReferenceMap<V>

Parameters:

key - key with which the specified value is associated.

oldValue - value expected to be associated with the specified key.

newValue - value to be associated with the specified key.

Returns:

true if the value was replaced.

See Also:

• Map.replace(Object, Object, Object)

computeIfAbsent

public V computeIfAbsent(long key,
 LongFunction<? extends V> mappingFunction)

Description copied from interface: Long2ReferenceMap

If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map.

Note that contrarily to the default computeIfAbsent(), it is not possible to not add a value for a given key, since the mappingFunction cannot return null. If such a behavior is needed, please use the corresponding nullable version.

Specified by:

computeIfAbsent in interface Long2ReferenceMap<V>

Parameters:

key - key with which the specified value is to be associated.

mappingFunction - the function to compute a value.

Returns:

the current (existing or computed) value associated with the specified key.

See Also:

• Map.computeIfAbsent(Object, java.util.function.Function)

computeIfAbsent

public V computeIfAbsent(long key,
 Long2ReferenceFunction<? extends V> mappingFunction)

Description copied from interface: Long2ReferenceMap

If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map, unless the key is not present in the given mapping function.

This version of computeIfAbsent() uses a type-specific version of fastutil's Function. Since Function has a containsKey() method, it is possible to avoid adding a key by having containsKey() return false for that key.

Specified by:

computeIfAbsent in interface Long2ReferenceMap<V>

Parameters:

key - key with which the specified value is to be associated.

mappingFunction - the function to compute a value.

Returns:

the current (existing or computed) value associated with the specified key.

See Also:

• Map.computeIfAbsent(Object, java.util.function.Function)

computeIfPresent

public V computeIfPresent(long key,
 BiFunction<? super Long,? super V,? extends V> remappingFunction)

Description copied from interface: Long2ReferenceMap

If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.

Specified by:

computeIfPresent in interface Long2ReferenceMap<V>

Parameters:

key - key with which the specified value is to be associated.

remappingFunction - the function to compute a value.

Returns:

the new value associated with the specified key, or the default return value if none.

See Also:

• Map.computeIfPresent(Object, java.util.function.BiFunction)

compute

public V compute(long key,
 BiFunction<? super Long,? super V,? extends V> remappingFunction)

Description copied from interface: Long2ReferenceMap

Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).

If the function returns null, the mapping is removed (or remains absent if initially absent). If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

Specified by:

compute in interface Long2ReferenceMap<V>

Parameters:

key - key with which the specified value is to be associated.

remappingFunction - the function to compute a value.

Returns:

the new value associated with the specified key, or the default return value if none.

See Also:

• Map.compute(Object, java.util.function.BiFunction)

merge

public V merge(long key,
 V value,
 BiFunction<? super V,? super V,? extends V> remappingFunction)

Description copied from interface: Long2ReferenceMap

If the specified key is not already associated with a value, associates it with the given value. Otherwise, replaces the associated value with the results of the given remapping function, or removes if the result is null.

Specified by:

merge in interface Long2ReferenceMap<V>

Parameters:

key - key with which the resulting value is to be associated.

value - the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.

remappingFunction - the function to recompute a value if present.

Returns:

the new value associated with the specified key, or the default return value if no value is associated with the key.

See Also:

• Map.merge(Object, Object, java.util.function.BiFunction)

getOrDefault

@Deprecated
public V getOrDefault(Object key,
 V defaultValue)

Deprecated.

Please use the corresponding type-specific method instead.

Returns the value associated by this function to the specified key, or give the specified value if not present.

Specified by:

getOrDefault in interface Function<Long,V>

Specified by:

getOrDefault in interface Long2ReferenceFunction<V>

Specified by:

getOrDefault in interface Long2ReferenceMap<V>

Specified by:

getOrDefault in interface Map<Long,V>

Overrides:

getOrDefault in class Long2ReferenceFunctions.UnmodifiableFunction<V>

Parameters:

key - the key.

defaultValue - the default value to return if not present.

Returns:

the corresponding value, or defaultValue if no value was present for the given key.

See Also:

• Map.getOrDefault(Object, Object)

remove

@Deprecated
public boolean remove(Object key,
 Object value)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

remove in interface Map<Long,V>

replace

@Deprecated
public V replace(Long key,
 V value)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

replace in interface Map<Long,V>

replace

@Deprecated
public boolean replace(Long key,
 V oldValue,
 V newValue)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

replace in interface Map<Long,V>

putIfAbsent

@Deprecated
public V putIfAbsent(Long key,
 V value)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

putIfAbsent in interface Map<Long,V>

computeIfAbsent

@Deprecated
public V computeIfAbsent(Long key,
 Function<? super Long,? extends V> mappingFunction)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

computeIfAbsent in interface Map<Long,V>

computeIfPresent

@Deprecated
public V computeIfPresent(Long key,
 BiFunction<? super Long,? super V,? extends V> remappingFunction)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

computeIfPresent in interface Map<Long,V>

compute

@Deprecated
public V compute(Long key,
 BiFunction<? super Long,? super V,? extends V> remappingFunction)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

compute in interface Map<Long,V>

merge

@Deprecated
public V merge(Long key,
 V value,
 BiFunction<? super V,? super V,? extends V> remappingFunction)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

merge in interface Map<Long,V>