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java.lang.Objectit.unimi.dsi.fastutil.bytes.AbstractByte2ObjectFunction<V>
it.unimi.dsi.fastutil.bytes.AbstractByte2ObjectMap<V>
it.unimi.dsi.fastutil.bytes.Byte2ObjectArrayMap<V>
public class Byte2ObjectArrayMap<V>
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.bytes.AbstractByte2ObjectMap |
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AbstractByte2ObjectMap.BasicEntry<V> |
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.bytes.Byte2ObjectMap |
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Byte2ObjectMap.Entry<V>, Byte2ObjectMap.FastEntrySet<V> |
Constructor Summary | |
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Byte2ObjectArrayMap()
Creates a new empty array map. |
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Byte2ObjectArrayMap(byte[] key,
java.lang.Object[] value)
Creates a new empty array map with given key and value backing arrays. |
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Byte2ObjectArrayMap(byte[] key,
java.lang.Object[] 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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Byte2ObjectArrayMap(Byte2ObjectMap<V> m)
Creates a new empty array map copying the entries of a given map. |
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Byte2ObjectArrayMap(int capacity)
Creates a new empty array map of given capacity. |
Method Summary | |
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Byte2ObjectMap.FastEntrySet<V> |
byte2ObjectEntrySet()
Returns a type-specific set view of the mappings contained in this map. |
void |
clear()
Removes all associations from this function (optional operation). |
java.lang.Object |
clone()
Returns a deep copy of this map. |
boolean |
containsKey(byte k)
Checks whether the given value is contained in AbstractByte2ObjectMap.keySet() . |
boolean |
containsValue(java.lang.Object v)
Checks whether the given value is contained in AbstractByte2ObjectMap.values() . |
V |
get(byte k)
Returns the value to which the given key is mapped. |
boolean |
isEmpty()
|
ByteSet |
keySet()
Returns a type-specific-set view of the keys of this map. |
V |
put(byte k,
V v)
Adds a pair to the map. |
V |
remove(byte 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. |
ObjectCollection<V> |
values()
Returns a type-specific-set view of the values of this map. |
Methods inherited from class it.unimi.dsi.fastutil.bytes.AbstractByte2ObjectMap |
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entrySet, equals, hashCode, putAll, toString |
Methods inherited from class it.unimi.dsi.fastutil.bytes.AbstractByte2ObjectFunction |
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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.bytes.Byte2ObjectFunction |
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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 Byte2ObjectArrayMap(byte[] key, java.lang.Object[] value)
key
- the key array.value
- the value array (it must have the same length as key
).public Byte2ObjectArrayMap()
public Byte2ObjectArrayMap(int capacity)
capacity
- the initial capacity.public Byte2ObjectArrayMap(Byte2ObjectMap<V> m)
m
- a map.public Byte2ObjectArrayMap(byte[] key, java.lang.Object[] 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 Byte2ObjectMap.FastEntrySet<V> byte2ObjectEntrySet()
Byte2ObjectMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Byte2ObjectMap.entrySet()
so that it returns an ObjectSet
of objects of type Byte2ObjectMap.Entry
(the latter makes it possible to
access keys and values with type-specific methods).
byte2ObjectEntrySet
in interface Byte2ObjectMap<V>
Byte2ObjectMap.entrySet()
public V get(byte k)
Byte2ObjectFunction
get
in interface Byte2ObjectFunction<V>
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<java.lang.Byte,V>
size
in interface java.util.Map<java.lang.Byte,V>
public void clear()
Function
clear
in interface Function<java.lang.Byte,V>
clear
in interface java.util.Map<java.lang.Byte,V>
clear
in class AbstractByte2ObjectFunction<V>
Map.clear()
public boolean containsKey(byte k)
AbstractByte2ObjectMap
AbstractByte2ObjectMap.keySet()
.
containsKey
in interface Byte2ObjectFunction<V>
containsKey
in class AbstractByte2ObjectMap<V>
Function.containsKey(Object)
public boolean containsValue(java.lang.Object v)
AbstractByte2ObjectMap
AbstractByte2ObjectMap.values()
.
containsValue
in interface java.util.Map<java.lang.Byte,V>
containsValue
in class AbstractByte2ObjectMap<V>
public boolean isEmpty()
isEmpty
in interface java.util.Map<java.lang.Byte,V>
isEmpty
in class AbstractByte2ObjectMap<V>
public V put(byte k, V v)
Byte2ObjectFunction
put
in interface Byte2ObjectFunction<V>
put
in class AbstractByte2ObjectFunction<V>
k
- the key.v
- the value.
Function.put(Object,Object)
public V remove(byte k)
Byte2ObjectFunction
remove
in interface Byte2ObjectFunction<V>
remove
in class AbstractByte2ObjectFunction<V>
Function.remove(Object)
public ByteSet keySet()
AbstractByte2ObjectMap
The view is backed by the set returned by AbstractByte2ObjectMap.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 Byte2ObjectMap<V>
keySet
in interface java.util.Map<java.lang.Byte,V>
keySet
in class AbstractByte2ObjectMap<V>
Map.keySet()
public ObjectCollection<V> values()
AbstractByte2ObjectMap
The view is backed by the set returned by AbstractByte2ObjectMap.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 Byte2ObjectMap<V>
values
in interface java.util.Map<java.lang.Byte,V>
values
in class AbstractByte2ObjectMap<V>
Map.values()
public java.lang.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 java.lang.Object
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