Class Char2CharArrayMap
- java.lang.Object
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- it.unimi.dsi.fastutil.chars.AbstractChar2CharFunction
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- it.unimi.dsi.fastutil.chars.AbstractChar2CharMap
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- it.unimi.dsi.fastutil.chars.Char2CharArrayMap
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- All Implemented Interfaces:
Char2CharFunction
,Char2CharMap
,Function<java.lang.Character,java.lang.Character>
,java.io.Serializable
,java.lang.Cloneable
,java.util.function.Function<java.lang.Character,java.lang.Character>
,java.util.function.IntUnaryOperator
,java.util.Map<java.lang.Character,java.lang.Character>
public class Char2CharArrayMap extends AbstractChar2CharMap implements java.io.Serializable, java.lang.Cloneable
A simple, brute-force implementation of a map based on two parallel backing arrays.The main purpose of this implementation is that of wrapping cleanly the brute-force approach to the storage of a very small number of pairs: just put them into two parallel arrays and scan linearly to find an item.
- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2CharMap
AbstractChar2CharMap.BasicEntry, AbstractChar2CharMap.BasicEntrySet
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Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.chars.Char2CharMap
Char2CharMap.Entry, Char2CharMap.FastEntrySet
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Constructor Summary
Constructors Constructor Description Char2CharArrayMap()
Creates a new empty array map.Char2CharArrayMap(char[] key, char[] value)
Creates a new empty array map with given key and value backing arrays.Char2CharArrayMap(char[] key, char[] value, int size)
Creates a new array map with given key and value backing arrays, using the given number of elements.Char2CharArrayMap(int capacity)
Creates a new empty array map of given capacity.Char2CharArrayMap(Char2CharMap m)
Creates a new empty array map copying the entries of a given map.Char2CharArrayMap(java.util.Map<? extends java.lang.Character,? extends java.lang.Character> m)
Creates a new empty array map copying the entries of a given map.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Char2CharMap.FastEntrySet
char2CharEntrySet()
Returns a type-specific set view of the mappings contained in this map.void
clear()
Removes all of the mappings from this map (optional operation).Char2CharArrayMap
clone()
Returns a deep copy of this map.boolean
containsKey(char k)
Returns true if this function contains a mapping for the specified key.boolean
containsValue(char v)
Returnstrue
if this map maps one or more keys to the specified value.char
get(char k)
Returns the value to which the given key is mapped.boolean
isEmpty()
CharSet
keySet()
Returns a type-specific-set view of the keys of this map.char
put(char k, char v)
Adds a pair to the map (optional operation).char
remove(char k)
Removes the mapping with the given key (optional operation).int
size()
Returns the number of key/value mappings in this map.CharCollection
values()
Returns a type-specific-set view of the values of this map.-
Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2CharMap
equals, hashCode, putAll, toString
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Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2CharFunction
defaultReturnValue, defaultReturnValue
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Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2CharFunction
applyAsInt
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Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2CharMap
compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsValue, defaultReturnValue, defaultReturnValue, entrySet, get, getOrDefault, getOrDefault, merge, merge, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace
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Constructor Detail
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Char2CharArrayMap
public Char2CharArrayMap(char[] key, char[] value)
Creates a new empty array map with given key and value backing arrays. The resulting map will have as many entries as the given arrays.It is responsibility of the caller that the elements of
key
are distinct.- Parameters:
key
- the key array.value
- the value array (it must have the same length askey
).
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Char2CharArrayMap
public Char2CharArrayMap()
Creates a new empty array map.
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Char2CharArrayMap
public Char2CharArrayMap(int capacity)
Creates a new empty array map of given capacity.- Parameters:
capacity
- the initial capacity.
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Char2CharArrayMap
public Char2CharArrayMap(Char2CharMap m)
Creates a new empty array map copying the entries of a given map.- Parameters:
m
- a map.
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Char2CharArrayMap
public Char2CharArrayMap(java.util.Map<? extends java.lang.Character,? extends java.lang.Character> m)
Creates a new empty array map copying the entries of a given map.- Parameters:
m
- a map.
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Char2CharArrayMap
public Char2CharArrayMap(char[] key, char[] value, int size)
Creates a new array map with given key and value backing arrays, using the given number of elements.It is responsibility of the caller that the first
size
elements ofkey
are distinct.- Parameters:
key
- the key array.value
- the value array (it must have the same length askey
).size
- the number of valid elements inkey
andvalue
.
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Method Detail
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char2CharEntrySet
public Char2CharMap.FastEntrySet char2CharEntrySet()
Description copied from interface:Char2CharMap
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 anObjectSet
of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).- Specified by:
char2CharEntrySet
in interfaceChar2CharMap
- Returns:
- a type-specific set view of the mappings contained in this map.
- See Also:
Map.entrySet()
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get
public char get(char k)
Description copied from interface:Char2CharFunction
Returns the value to which the given key is mapped.- Specified by:
get
in interfaceChar2CharFunction
- Parameters:
k
- the key.- Returns:
- the corresponding value, or the default return value if no value was present for the given key.
- See Also:
Function.get(Object)
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size
public int size()
Description copied from interface:Char2CharMap
Returns the number of key/value mappings in this map. If the map contains more thanInteger.MAX_VALUE
elements, returnsInteger.MAX_VALUE
.- Specified by:
size
in interfaceChar2CharMap
- Specified by:
size
in interfaceFunction<java.lang.Character,java.lang.Character>
- Specified by:
size
in interfacejava.util.Map<java.lang.Character,java.lang.Character>
- Returns:
- the number of key-value mappings in this map.
- See Also:
Size64
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clear
public void clear()
Description copied from interface:Char2CharMap
Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.- Specified by:
clear
in interfaceChar2CharMap
- Specified by:
clear
in interfaceFunction<java.lang.Character,java.lang.Character>
- Specified by:
clear
in interfacejava.util.Map<java.lang.Character,java.lang.Character>
- See Also:
Map.clear()
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containsKey
public boolean containsKey(char k)
Description copied from interface:Char2CharMap
Returns true if this function contains a mapping for the specified key.- Specified by:
containsKey
in interfaceChar2CharFunction
- Specified by:
containsKey
in interfaceChar2CharMap
- Overrides:
containsKey
in classAbstractChar2CharMap
- Parameters:
k
- the key.- Returns:
- true if this function associates a value to
key
. - See Also:
Map.containsKey(Object)
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containsValue
public boolean containsValue(char v)
Description copied from interface:Char2CharMap
Returnstrue
if this map maps one or more keys to the specified value.- Specified by:
containsValue
in interfaceChar2CharMap
- Overrides:
containsValue
in classAbstractChar2CharMap
- See Also:
Map.containsValue(Object)
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isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interfacejava.util.Map<java.lang.Character,java.lang.Character>
- Overrides:
isEmpty
in classAbstractChar2CharMap
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put
public char put(char k, char v)
Description copied from interface:Char2CharFunction
Adds a pair to the map (optional operation).- Specified by:
put
in interfaceChar2CharFunction
- Parameters:
k
- the key.v
- the value.- Returns:
- the old value, or the default return value if no value was present for the given key.
- See Also:
Function.put(Object,Object)
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remove
public char remove(char k)
Description copied from interface:Char2CharFunction
Removes the mapping with the given key (optional operation).- Specified by:
remove
in interfaceChar2CharFunction
- Parameters:
k
- the key.- Returns:
- the old value, or the default return value if no value was present for the given key.
- See Also:
Function.remove(Object)
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keySet
public CharSet keySet()
Description copied from class:AbstractChar2CharMap
Returns a type-specific-set view of the keys of this map.The view is backed by the set returned by
Map.entrySet()
. Note that no attempt is made at caching the result of this method, as this would require adding some attributes that lightweight implementations would not need. Subclasses may easily override this policy by calling this method and caching the result, but implementors are encouraged to write more efficient ad-hoc implementations.- Specified by:
keySet
in interfaceChar2CharMap
- Specified by:
keySet
in interfacejava.util.Map<java.lang.Character,java.lang.Character>
- Overrides:
keySet
in classAbstractChar2CharMap
- Returns:
- a set view of the keys of this map; it may be safely cast to a type-specific interface.
- See Also:
Map.keySet()
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values
public CharCollection values()
Description copied from class:AbstractChar2CharMap
Returns a type-specific-set view of the values of this map.The view is backed by the set returned by
Map.entrySet()
. Note that no attempt is made at caching the result of this method, as this would require adding some attributes that lightweight implementations would not need. Subclasses may easily override this policy by calling this method and caching the result, but implementors are encouraged to write more efficient ad-hoc implementations.- Specified by:
values
in interfaceChar2CharMap
- Specified by:
values
in interfacejava.util.Map<java.lang.Character,java.lang.Character>
- Overrides:
values
in classAbstractChar2CharMap
- Returns:
- a set view of the values of this map; it may be safely cast to a type-specific interface.
- See Also:
Map.values()
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clone
public Char2CharArrayMap clone()
Returns a deep copy of this map.This method performs a deep copy of this hash map; the data stored in the map, however, is not cloned. Note that this makes a difference only for object keys.
- Returns:
- a deep copy of this map.
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