Class Char2ByteArrayMap
- All Implemented Interfaces:
Char2ByteFunction
,Char2ByteMap
,Function<Character,
,Byte> Serializable
,Cloneable
,Function<Character,
,Byte> IntUnaryOperator
,Map<Character,
Byte>
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:
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Nested Class Summary
Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2ByteMap
AbstractChar2ByteMap.BasicEntry, AbstractChar2ByteMap.BasicEntrySet
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.chars.Char2ByteMap
Char2ByteMap.Entry, Char2ByteMap.FastEntrySet
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Constructor Summary
ConstructorDescriptionCreates a new empty array map.Char2ByteArrayMap
(char[] key, byte[] value) Creates a new empty array map with given key and value backing arrays.Char2ByteArrayMap
(char[] key, byte[] value, int size) Creates a new array map with given key and value backing arrays, using the given number of elements.Char2ByteArrayMap
(int capacity) Creates a new empty array map of given capacity.Creates a new empty array map copying the entries of a given map.Char2ByteArrayMap
(Map<? extends Character, ? extends Byte> m) Creates a new empty array map copying the entries of a given map. -
Method Summary
Modifier and TypeMethodDescriptionReturns a type-specific set view of the mappings contained in this map.void
clear()
Removes all of the mappings from this map (optional operation).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
(byte v) Returnstrue
if this map maps one or more keys to the specified value.byte
get
(char k) Returns the value to which the given key is mapped.boolean
isEmpty()
keySet()
Returns a type-specific-set view of the keys of this map.byte
put
(char k, byte v) Adds a pair to the map (optional operation).byte
remove
(char k) Removes the mapping with the given key (optional operation).int
size()
Returns the number of key/value mappings in this map.values()
Returns a type-specific-set view of the values of this map.Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2ByteMap
equals, hashCode, putAll, toString
Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2ByteFunction
defaultReturnValue, defaultReturnValue
Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2ByteFunction
andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsInt, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort
Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2ByteMap
compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsValue, defaultReturnValue, defaultReturnValue, entrySet, forEach, get, getOrDefault, getOrDefault, merge, merge, mergeByte, mergeByte, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace
Methods inherited from interface java.util.function.IntUnaryOperator
andThen, compose
Methods inherited from interface java.util.Map
replaceAll
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Constructor Details
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Char2ByteArrayMap
public Char2ByteArrayMap(char[] key, byte[] 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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Char2ByteArrayMap
public Char2ByteArrayMap()Creates a new empty array map. -
Char2ByteArrayMap
public Char2ByteArrayMap(int capacity) Creates a new empty array map of given capacity.- Parameters:
capacity
- the initial capacity.
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Char2ByteArrayMap
Creates a new empty array map copying the entries of a given map.- Parameters:
m
- a map.
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Char2ByteArrayMap
Creates a new empty array map copying the entries of a given map.- Parameters:
m
- a map.
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Char2ByteArrayMap
public Char2ByteArrayMap(char[] key, byte[] 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 Details
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char2ByteEntrySet
Description copied from interface:Char2ByteMap
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:
char2ByteEntrySet
in interfaceChar2ByteMap
- Returns:
- a type-specific set view of the mappings contained in this map.
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get
public byte get(char k) Description copied from interface:Char2ByteFunction
Returns the value to which the given key is mapped.- Specified by:
get
in interfaceChar2ByteFunction
- Parameters:
k
- the key.- Returns:
- the corresponding value, or the default return value if no value was present for the given key.
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size
public int size()Description copied from interface:Char2ByteMap
Returns the number of key/value mappings in this map. If the map contains more thanInteger.MAX_VALUE
elements, returnsInteger.MAX_VALUE
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clear
public void clear()Description copied from interface:Char2ByteMap
Removes all of the mappings from this map (optional operation). The map will be empty after this call returns. -
containsKey
public boolean containsKey(char k) Description copied from class:AbstractChar2ByteMap
Returns true if this function contains a mapping for the specified key.- Specified by:
containsKey
in interfaceChar2ByteFunction
- Specified by:
containsKey
in interfaceChar2ByteMap
- Overrides:
containsKey
in classAbstractChar2ByteMap
- Parameters:
k
- the key.- Returns:
- true if this function associates a value to
key
. - See Also:
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containsValue
public boolean containsValue(byte v) Description copied from class:AbstractChar2ByteMap
Returnstrue
if this map maps one or more keys to the specified value.- Specified by:
containsValue
in interfaceChar2ByteMap
- Overrides:
containsValue
in classAbstractChar2ByteMap
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isEmpty
public boolean isEmpty() -
put
public byte put(char k, byte v) Description copied from interface:Char2ByteFunction
Adds a pair to the map (optional operation).- Specified by:
put
in interfaceChar2ByteFunction
- 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.
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remove
public byte remove(char k) Description copied from interface:Char2ByteFunction
Removes the mapping with the given key (optional operation).- Specified by:
remove
in interfaceChar2ByteFunction
- Parameters:
k
- the key.- Returns:
- the old value, or the default return value if no value was present for the given key.
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keySet
Description copied from class:AbstractChar2ByteMap
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 interfaceChar2ByteMap
- Specified by:
keySet
in interfaceMap<Character,
Byte> - Overrides:
keySet
in classAbstractChar2ByteMap
- Returns:
- a set view of the keys of this map; it may be safely cast to a type-specific interface.
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values
Description copied from class:AbstractChar2ByteMap
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 interfaceChar2ByteMap
- Specified by:
values
in interfaceMap<Character,
Byte> - Overrides:
values
in classAbstractChar2ByteMap
- Returns:
- a set view of the values of this map; it may be safely cast to a type-specific interface.
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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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