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java.lang.Objectit.unimi.dsi.fastutil.shorts.AbstractShort2ShortFunction
it.unimi.dsi.fastutil.shorts.AbstractShort2ShortMap
it.unimi.dsi.fastutil.shorts.Short2ShortArrayMap
public class Short2ShortArrayMap
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.shorts.AbstractShort2ShortMap |
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AbstractShort2ShortMap.BasicEntry |
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.shorts.Short2ShortMap |
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Short2ShortMap.Entry, Short2ShortMap.FastEntrySet |
Constructor Summary | |
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Short2ShortArrayMap()
Creates a new empty array map. |
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Short2ShortArrayMap(int capacity)
Creates a new empty array map of given capacity. |
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Short2ShortArrayMap(short[] key,
short[] value)
Creates a new empty array map with given key and value backing arrays. |
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Short2ShortArrayMap(short[] key,
short[] 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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Short2ShortArrayMap(Short2ShortMap m)
Creates a new empty array map copying the entries of a given map. |
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(short k)
Checks whether the given value is contained in AbstractShort2ShortMap.keySet() . |
boolean |
containsValue(short v)
Checks whether the given value is contained in AbstractShort2ShortMap.values() . |
short |
get(short k)
Returns the value to which the given key is mapped. |
boolean |
isEmpty()
|
ShortSet |
keySet()
Returns a type-specific-set view of the keys of this map. |
short |
put(short k,
short v)
Adds a pair to the map. |
short |
remove(short k)
Removes the mapping with the given key. |
Short2ShortMap.FastEntrySet |
short2ShortEntrySet()
Returns a type-specific set view of the mappings contained in this map. |
int |
size()
Returns the intended number of keys in this function, or -1 if no such number exists. |
ShortCollection |
values()
Returns a type-specific-set view of the values of this map. |
Methods inherited from class it.unimi.dsi.fastutil.shorts.AbstractShort2ShortMap |
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containsValue, entrySet, equals, hashCode, putAll, toString |
Methods inherited from class it.unimi.dsi.fastutil.shorts.AbstractShort2ShortFunction |
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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.shorts.Short2ShortFunction |
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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 Short2ShortArrayMap(short[] key, short[] value)
key
- the key array.value
- the value array (it must have the same length as key
).public Short2ShortArrayMap()
public Short2ShortArrayMap(int capacity)
capacity
- the initial capacity.public Short2ShortArrayMap(Short2ShortMap m)
m
- a map.public Short2ShortArrayMap(short[] key, short[] 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 Short2ShortMap.FastEntrySet short2ShortEntrySet()
Short2ShortMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Short2ShortMap.entrySet()
so that it returns an ObjectSet
of objects of type Short2ShortMap.Entry
(the latter makes it possible to
access keys and values with type-specific methods).
short2ShortEntrySet
in interface Short2ShortMap
Short2ShortMap.entrySet()
public short get(short k)
Short2ShortFunction
get
in interface Short2ShortFunction
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<Short,Short>
size
in interface Map<Short,Short>
public void clear()
Function
clear
in interface Function<Short,Short>
clear
in interface Map<Short,Short>
clear
in class AbstractShort2ShortFunction
Map.clear()
public boolean containsKey(short k)
AbstractShort2ShortMap
AbstractShort2ShortMap.keySet()
.
containsKey
in interface Short2ShortFunction
containsKey
in class AbstractShort2ShortMap
Function.containsKey(Object)
public boolean containsValue(short v)
AbstractShort2ShortMap
AbstractShort2ShortMap.values()
.
containsValue
in interface Short2ShortMap
containsValue
in class AbstractShort2ShortMap
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface Map<Short,Short>
isEmpty
in class AbstractShort2ShortMap
public short put(short k, short v)
Short2ShortFunction
put
in interface Short2ShortFunction
put
in class AbstractShort2ShortFunction
k
- the key.v
- the value.
Function.put(Object,Object)
public short remove(short k)
Short2ShortFunction
remove
in interface Short2ShortFunction
remove
in class AbstractShort2ShortFunction
Function.remove(Object)
public ShortSet keySet()
AbstractShort2ShortMap
The view is backed by the set returned by AbstractShort2ShortMap.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 Short2ShortMap
keySet
in interface Map<Short,Short>
keySet
in class AbstractShort2ShortMap
Map.keySet()
public ShortCollection values()
AbstractShort2ShortMap
The view is backed by the set returned by AbstractShort2ShortMap.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 Short2ShortMap
values
in interface Map<Short,Short>
values
in class AbstractShort2ShortMap
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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