Package it.unimi.dsi.fastutil.ints

Class Int2IntMaps.UnmodifiableMap

java.lang.Object

it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction

it.unimi.dsi.fastutil.ints.Int2IntFunctions.UnmodifiableFunction

it.unimi.dsi.fastutil.ints.Int2IntMaps.UnmodifiableMap

All Implemented Interfaces:

Function<Integer,Integer>, Int2IntFunction, Int2IntMap, Serializable, Function<Integer,Integer>, IntUnaryOperator, Map<Integer,Integer>

Direct Known Subclasses:

Int2IntSortedMaps.UnmodifiableSortedMap

Enclosing class:

Int2IntMaps

public static class Int2IntMaps.UnmodifiableMap
extends Int2IntFunctions.UnmodifiableFunction
implements Int2IntMap, Serializable

An unmodifiable wrapper class for maps.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.ints.Int2IntMap

Int2IntMap.Entry, Int2IntMap.FastEntrySet

Method Summary

Modifier and Type	Method	Description
int	compute(int key, BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)	Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
Integer	compute(Integer key, BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)	Deprecated. Please use the corresponding type-specific method instead.
int	computeIfAbsent(int key, Int2IntFunction 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.
int	computeIfAbsent(int key, IntUnaryOperator 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.
Integer	computeIfAbsent(Integer key, Function<? super Integer,? extends Integer> mappingFunction)	Deprecated. Please use the corresponding type-specific method instead.
int	computeIfAbsentNullable(int key, IntFunction<? extends Integer> 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 it is null.
int	computeIfPresent(int key, BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)	If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.
Integer	computeIfPresent(Integer key, BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)	Deprecated. Please use the corresponding type-specific method instead.
boolean	containsValue(int v)	Returns true if this map maps one or more keys to the specified value.
boolean	containsValue(Object ov)	Deprecated. Please use the corresponding type-specific method instead.
ObjectSet<Map.Entry<Integer,Integer>>	entrySet()	Deprecated. Please use the corresponding type-specific method instead.
boolean	equals(Object o)
void	forEach(BiConsumer<? super Integer,? super Integer> action)
int	getOrDefault(int key, int defaultValue)	Returns the value associated by this function to the specified key, or give the specified value if not present.
Integer	getOrDefault(Object key, Integer defaultValue)	Deprecated. Please use the corresponding type-specific method instead.
int	hashCode()
ObjectSet<Int2IntMap.Entry>	int2IntEntrySet()	Returns a type-specific set view of the mappings contained in this map.
boolean	isEmpty()
IntSet	keySet()
int	merge(int key, int value, BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)	If the specified key is not already associated with a value, associates it with the given value.
Integer	merge(Integer key, Integer value, BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)	Deprecated. Please use the corresponding type-specific method instead.
void	putAll(Map<? extends Integer,? extends Integer> m)
int	putIfAbsent(int key, int 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.
Integer	putIfAbsent(Integer key, Integer value)	Deprecated. Please use the corresponding type-specific method instead.
boolean	remove(int key, int 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.
int	replace(int key, int value)	Replaces the entry for the specified key only if it is currently mapped to some value.
boolean	replace(int key, int oldValue, int newValue)	Replaces the entry for the specified key only if currently mapped to the specified value.
Integer	replace(Integer key, Integer value)	Deprecated. Please use the corresponding type-specific method instead.
boolean	replace(Integer key, Integer oldValue, Integer newValue)	Deprecated. Please use the corresponding type-specific method instead.
void	replaceAll(BiFunction<? super Integer,? super Integer,? extends Integer> function)
IntCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.ints.Int2IntFunctions.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 it.unimi.dsi.fastutil.ints.Int2IntFunction

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

Methods inherited from interface it.unimi.dsi.fastutil.ints.Int2IntMap

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

Methods inherited from interface java.util.function.IntUnaryOperator

andThen, compose

Method Details

containsValue

public boolean containsValue(int v)

Description copied from interface: Int2IntMap

Returns true if this map maps one or more keys to the specified value.

Specified by:

containsValue in interface Int2IntMap

See Also:

• Map.containsValue(Object)

containsValue

@Deprecated
public boolean containsValue(Object ov)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

containsValue in interface Int2IntMap

Specified by:

containsValue in interface Map<Integer,Integer>

putAll

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

Specified by:

putAll in interface Map<Integer,Integer>

int2IntEntrySet

public ObjectSet<Int2IntMap.Entry> int2IntEntrySet()

Description copied from interface: Int2IntMap

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:

int2IntEntrySet in interface Int2IntMap

Returns:

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

See Also:

• Map.entrySet()

entrySet

@Deprecated
public ObjectSet<Map.Entry<Integer,Integer>> 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 Int2IntMap

Specified by:

entrySet in interface Map<Integer,Integer>

Returns:

a set view of the mappings contained in this map.

See Also:

• Map.entrySet()

keySet

public IntSet keySet()

Description copied from interface: Int2IntMap

Specified by:

keySet in interface Int2IntMap

Specified by:

keySet in interface Map<Integer,Integer>

Returns:

a set view of the keys contained in this map.

See Also:

• Map.keySet()

values

public IntCollection values()

Description copied from interface: Int2IntMap

Specified by:

values in interface Int2IntMap

Specified by:

values in interface Map<Integer,Integer>

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<Integer,Integer>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Integer,Integer>

Overrides:

hashCode in class Int2IntFunctions.UnmodifiableFunction

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Integer,Integer>

Overrides:

equals in class Int2IntFunctions.UnmodifiableFunction

getOrDefault

public int getOrDefault(int key,
 int defaultValue)

Description copied from interface: Int2IntFunction

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

Specified by:

getOrDefault in interface Int2IntFunction

Specified by:

getOrDefault in interface Int2IntMap

Overrides:

getOrDefault in class Int2IntFunctions.UnmodifiableFunction

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 Integer,? super Integer> action)

Specified by:

forEach in interface Int2IntMap

Specified by:

forEach in interface Map<Integer,Integer>

replaceAll

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

Specified by:

replaceAll in interface Map<Integer,Integer>

putIfAbsent

public int putIfAbsent(int key,
 int value)

Description copied from interface: Int2IntMap

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 Int2IntMap

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(int key,
 int value)

Description copied from interface: Int2IntMap

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

Specified by:

remove in interface Int2IntMap

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 int replace(int key,
 int value)

Description copied from interface: Int2IntMap

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

Specified by:

replace in interface Int2IntMap

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(int key,
 int oldValue,
 int newValue)

Description copied from interface: Int2IntMap

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

Specified by:

replace in interface Int2IntMap

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 int computeIfAbsent(int key,
 IntUnaryOperator mappingFunction)

Description copied from interface: Int2IntMap

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 Int2IntMap

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)

computeIfAbsentNullable

public int computeIfAbsentNullable(int key,
 IntFunction<? extends Integer> mappingFunction)

Description copied from interface: Int2IntMap

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 it is null.

Note that this version of computeIfAbsent() should be used only if you plan to return null in the mapping function.

Specified by:

computeIfAbsentNullable in interface Int2IntMap

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, or the default return value if the computed value is null.

See Also:

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

computeIfAbsent

public int computeIfAbsent(int key,
 Int2IntFunction mappingFunction)

Description copied from interface: Int2IntMap

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 Int2IntMap

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 int computeIfPresent(int key,
 BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)

Description copied from interface: Int2IntMap

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 Int2IntMap

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 int compute(int key,
 BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)

Description copied from interface: Int2IntMap

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 Int2IntMap

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 int merge(int key,
 int value,
 BiFunction<? super Integer,? super Integer,? extends Integer> remappingFunction)

Description copied from interface: Int2IntMap

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 Int2IntMap

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 Integer getOrDefault(Object key,
 Integer 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<Integer,Integer>

Specified by:

getOrDefault in interface Int2IntFunction

Specified by:

getOrDefault in interface Int2IntMap

Specified by:

getOrDefault in interface Map<Integer,Integer>

Overrides:

getOrDefault in class Int2IntFunctions.UnmodifiableFunction

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.

This default implementation just delegates to the corresponding Map method.

Specified by:

remove in interface Int2IntMap

Specified by:

remove in interface Map<Integer,Integer>

replace

@Deprecated
public Integer replace(Integer key,
 Integer value)

Deprecated.

Please use the corresponding type-specific method instead.

This default implementation just delegates to the corresponding Map method.

Specified by:

replace in interface Int2IntMap

Specified by:

replace in interface Map<Integer,Integer>

replace

@Deprecated
public boolean replace(Integer key,
 Integer oldValue,
 Integer newValue)

Deprecated.

Please use the corresponding type-specific method instead.

This default implementation just delegates to the corresponding Map method.

Specified by:

replace in interface Int2IntMap

Specified by:

replace in interface Map<Integer,Integer>

putIfAbsent

@Deprecated
public Integer putIfAbsent(Integer key,
 Integer value)

Deprecated.

Please use the corresponding type-specific method instead.

This default implementation just delegates to the corresponding Map method.

Specified by:

putIfAbsent in interface Int2IntMap

Specified by:

putIfAbsent in interface Map<Integer,Integer>

computeIfAbsent

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

Deprecated.

Please use the corresponding type-specific method instead.

This default implementation just delegates to the corresponding Map method.

Specified by:

computeIfAbsent in interface Int2IntMap

Specified by:

computeIfAbsent in interface Map<Integer,Integer>

computeIfPresent

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

Deprecated.

Please use the corresponding type-specific method instead.

This default implementation just delegates to the corresponding Map method.

Specified by:

computeIfPresent in interface Int2IntMap

Specified by:

computeIfPresent in interface Map<Integer,Integer>

compute

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

Deprecated.

Please use the corresponding type-specific method instead.

This default implementation just delegates to the corresponding Map method.

Specified by:

compute in interface Int2IntMap

Specified by:

compute in interface Map<Integer,Integer>

merge

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

Deprecated.

Please use the corresponding type-specific method instead.

This default implementation just delegates to the corresponding Map method.

Specified by:

merge in interface Int2IntMap

Specified by:

merge in interface Map<Integer,Integer>