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java.lang.Objectit.unimi.dsi.fastutil.floats.AbstractFloat2FloatFunction
it.unimi.dsi.fastutil.floats.AbstractFloat2FloatMap
it.unimi.dsi.fastutil.floats.Float2FloatArrayMap
public class Float2FloatArrayMap
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.
Nested Class Summary |
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Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.floats.AbstractFloat2FloatMap |
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AbstractFloat2FloatMap.BasicEntry |
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.floats.Float2FloatMap |
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Float2FloatMap.Entry, Float2FloatMap.FastEntrySet |
Constructor Summary | |
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Float2FloatArrayMap()
Creates a new empty array map. |
|
Float2FloatArrayMap(float[] key,
float[] value)
Creates a new empty array map with given key and value backing arrays. |
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Float2FloatArrayMap(float[] key,
float[] value,
int size)
Creates a new array map with given key and value backing arrays, using the given number of elements. |
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Float2FloatArrayMap(Float2FloatMap m)
Creates a new empty array map copying the entries of a given map. |
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Float2FloatArrayMap(int capacity)
Creates a new empty array map of given capacity. |
Method Summary | |
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void |
clear()
Removes all associations from this function (optional operation). |
Object |
clone()
Returns a deep copy of this map. |
boolean |
containsKey(float k)
Checks whether the given value is contained in AbstractFloat2FloatMap.keySet() . |
boolean |
containsValue(float v)
Checks whether the given value is contained in AbstractFloat2FloatMap.values() . |
Float2FloatMap.FastEntrySet |
float2FloatEntrySet()
Returns a type-specific set view of the mappings contained in this map. |
float |
get(float k)
Returns the value to which the given key is mapped. |
boolean |
isEmpty()
|
FloatSet |
keySet()
Returns a type-specific-set view of the keys of this map. |
float |
put(float k,
float v)
Adds a pair to the map. |
float |
remove(float k)
Removes the mapping with the given key. |
int |
size()
Returns the intended number of keys in this function, or -1 if no such number exists. |
FloatCollection |
values()
Returns a type-specific-set view of the values of this map. |
Methods inherited from class it.unimi.dsi.fastutil.floats.AbstractFloat2FloatMap |
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containsValue, entrySet, equals, hashCode, putAll, toString |
Methods inherited from class it.unimi.dsi.fastutil.floats.AbstractFloat2FloatFunction |
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containsKey, defaultReturnValue, defaultReturnValue, get, put, remove |
Methods inherited from class java.lang.Object |
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getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface it.unimi.dsi.fastutil.floats.Float2FloatFunction |
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defaultReturnValue, defaultReturnValue |
Methods inherited from interface it.unimi.dsi.fastutil.Function |
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containsKey, get, put, remove |
Methods inherited from interface java.util.Map |
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containsKey, get, put, remove |
Constructor Detail |
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public Float2FloatArrayMap(float[] key, float[] value)
key
- the key array.value
- the value array (it must have the same length as key
).public Float2FloatArrayMap()
public Float2FloatArrayMap(int capacity)
capacity
- the initial capacity.public Float2FloatArrayMap(Float2FloatMap m)
m
- a map.public Float2FloatArrayMap(float[] key, float[] value, int size)
key
- the key array.value
- the value array (it must have the same length as key
).size
- the number of valid elements in key
and value
.Method Detail |
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public Float2FloatMap.FastEntrySet float2FloatEntrySet()
Float2FloatMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Float2FloatMap.entrySet()
so that it returns an ObjectSet
of objects of type Float2FloatMap.Entry
(the latter makes it possible to
access keys and values with type-specific methods).
float2FloatEntrySet
in interface Float2FloatMap
Float2FloatMap.entrySet()
public float get(float k)
Float2FloatFunction
get
in interface Float2FloatFunction
k
- the key.
Function.get(Object)
public int size()
Function
Most function implementations will have some knowledge of the intended number of keys in their domain. In some cases, however, this might not be possible.
size
in interface Function<Float,Float>
size
in interface Map<Float,Float>
public void clear()
Function
clear
in interface Function<Float,Float>
clear
in interface Map<Float,Float>
clear
in class AbstractFloat2FloatFunction
Map.clear()
public boolean containsKey(float k)
AbstractFloat2FloatMap
AbstractFloat2FloatMap.keySet()
.
containsKey
in interface Float2FloatFunction
containsKey
in class AbstractFloat2FloatMap
Function.containsKey(Object)
public boolean containsValue(float v)
AbstractFloat2FloatMap
AbstractFloat2FloatMap.values()
.
containsValue
in interface Float2FloatMap
containsValue
in class AbstractFloat2FloatMap
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface Map<Float,Float>
isEmpty
in class AbstractFloat2FloatMap
public float put(float k, float v)
Float2FloatFunction
put
in interface Float2FloatFunction
put
in class AbstractFloat2FloatFunction
k
- the key.v
- the value.
Function.put(Object,Object)
public float remove(float k)
Float2FloatFunction
remove
in interface Float2FloatFunction
remove
in class AbstractFloat2FloatFunction
Function.remove(Object)
public FloatSet keySet()
AbstractFloat2FloatMap
The view is backed by the set returned by AbstractFloat2FloatMap.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.
keySet
in interface Float2FloatMap
keySet
in interface Map<Float,Float>
keySet
in class AbstractFloat2FloatMap
Map.keySet()
public FloatCollection values()
AbstractFloat2FloatMap
The view is backed by the set returned by AbstractFloat2FloatMap.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.
values
in interface Float2FloatMap
values
in interface Map<Float,Float>
values
in class AbstractFloat2FloatMap
Map.values()
public Object clone()
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.
clone
in class Object
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