Class Char2IntArrayMap
- java.lang.Object
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- it.unimi.dsi.fastutil.chars.AbstractChar2IntFunction
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- it.unimi.dsi.fastutil.chars.AbstractChar2IntMap
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- it.unimi.dsi.fastutil.chars.Char2IntArrayMap
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- All Implemented Interfaces:
Char2IntFunction
,Char2IntMap
,Function<java.lang.Character,java.lang.Integer>
,java.io.Serializable
,java.lang.Cloneable
,java.util.function.Function<java.lang.Character,java.lang.Integer>
,java.util.function.IntUnaryOperator
,java.util.Map<java.lang.Character,java.lang.Integer>
public class Char2IntArrayMap extends AbstractChar2IntMap 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.AbstractChar2IntMap
AbstractChar2IntMap.BasicEntry, AbstractChar2IntMap.BasicEntrySet
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Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.chars.Char2IntMap
Char2IntMap.Entry, Char2IntMap.FastEntrySet
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Constructor Summary
Constructors Constructor Description Char2IntArrayMap()
Creates a new empty array map.Char2IntArrayMap(char[] key, int[] value)
Creates a new empty array map with given key and value backing arrays.Char2IntArrayMap(char[] key, int[] value, int size)
Creates a new array map with given key and value backing arrays, using the given number of elements.Char2IntArrayMap(int capacity)
Creates a new empty array map of given capacity.Char2IntArrayMap(Char2IntMap m)
Creates a new empty array map copying the entries of a given map.Char2IntArrayMap(java.util.Map<? extends java.lang.Character,? extends java.lang.Integer> 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 Char2IntMap.FastEntrySet
char2IntEntrySet()
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).Char2IntArrayMap
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(int v)
Returnstrue
if this map maps one or more keys to the specified value.int
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.int
put(char k, int v)
Adds a pair to the map (optional operation).int
remove(char k)
Removes the mapping with the given key (optional operation).int
size()
Returns the number of key/value mappings in this map.IntCollection
values()
Returns a type-specific-set view of the values of this map.-
Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2IntMap
equals, hashCode, mergeInt, putAll, toString
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Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2IntFunction
defaultReturnValue, defaultReturnValue
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Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2IntFunction
andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsInt, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort
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Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2IntMap
compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsValue, defaultReturnValue, defaultReturnValue, entrySet, forEach, get, getOrDefault, getOrDefault, merge, merge, mergeInt, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace
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Constructor Detail
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Char2IntArrayMap
public Char2IntArrayMap(char[] key, int[] 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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Char2IntArrayMap
public Char2IntArrayMap()
Creates a new empty array map.
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Char2IntArrayMap
public Char2IntArrayMap(int capacity)
Creates a new empty array map of given capacity.- Parameters:
capacity
- the initial capacity.
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Char2IntArrayMap
public Char2IntArrayMap(Char2IntMap m)
Creates a new empty array map copying the entries of a given map.- Parameters:
m
- a map.
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Char2IntArrayMap
public Char2IntArrayMap(java.util.Map<? extends java.lang.Character,? extends java.lang.Integer> m)
Creates a new empty array map copying the entries of a given map.- Parameters:
m
- a map.
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Char2IntArrayMap
public Char2IntArrayMap(char[] key, int[] 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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char2IntEntrySet
public Char2IntMap.FastEntrySet char2IntEntrySet()
Description copied from interface:Char2IntMap
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:
char2IntEntrySet
in interfaceChar2IntMap
- Returns:
- a type-specific set view of the mappings contained in this map.
- See Also:
Map.entrySet()
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get
public int get(char k)
Description copied from interface:Char2IntFunction
Returns the value to which the given key is mapped.- Specified by:
get
in interfaceChar2IntFunction
- 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:Char2IntMap
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 interfaceChar2IntMap
- Specified by:
size
in interfaceFunction<java.lang.Character,java.lang.Integer>
- Specified by:
size
in interfacejava.util.Map<java.lang.Character,java.lang.Integer>
- 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:Char2IntMap
Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.- Specified by:
clear
in interfaceChar2IntMap
- Specified by:
clear
in interfaceFunction<java.lang.Character,java.lang.Integer>
- Specified by:
clear
in interfacejava.util.Map<java.lang.Character,java.lang.Integer>
- See Also:
Map.clear()
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containsKey
public boolean containsKey(char k)
Description copied from class:AbstractChar2IntMap
Returns true if this function contains a mapping for the specified key.- Specified by:
containsKey
in interfaceChar2IntFunction
- Specified by:
containsKey
in interfaceChar2IntMap
- Overrides:
containsKey
in classAbstractChar2IntMap
- 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(int v)
Description copied from class:AbstractChar2IntMap
Returnstrue
if this map maps one or more keys to the specified value.- Specified by:
containsValue
in interfaceChar2IntMap
- Overrides:
containsValue
in classAbstractChar2IntMap
- 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.Integer>
- Overrides:
isEmpty
in classAbstractChar2IntMap
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put
public int put(char k, int v)
Description copied from interface:Char2IntFunction
Adds a pair to the map (optional operation).- Specified by:
put
in interfaceChar2IntFunction
- 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 int remove(char k)
Description copied from interface:Char2IntFunction
Removes the mapping with the given key (optional operation).- Specified by:
remove
in interfaceChar2IntFunction
- 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:AbstractChar2IntMap
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 interfaceChar2IntMap
- Specified by:
keySet
in interfacejava.util.Map<java.lang.Character,java.lang.Integer>
- Overrides:
keySet
in classAbstractChar2IntMap
- 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 IntCollection values()
Description copied from class:AbstractChar2IntMap
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 interfaceChar2IntMap
- Specified by:
values
in interfacejava.util.Map<java.lang.Character,java.lang.Integer>
- Overrides:
values
in classAbstractChar2IntMap
- 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 Char2IntArrayMap 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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