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java.lang.Objectit.unimi.dsi.fastutil.objects.AbstractObject2BooleanFunction<K>
it.unimi.dsi.fastutil.objects.AbstractObject2BooleanMap<K>
it.unimi.dsi.fastutil.objects.Object2BooleanArrayMap<K>
public class Object2BooleanArrayMap<K>
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.objects.AbstractObject2BooleanMap |
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AbstractObject2BooleanMap.BasicEntry<K> |
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Object2BooleanMap |
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Object2BooleanMap.Entry<K>, Object2BooleanMap.FastEntrySet<K> |
Constructor Summary | |
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Object2BooleanArrayMap()
Creates a new empty array map. |
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Object2BooleanArrayMap(int capacity)
Creates a new empty array map of given capacity. |
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Object2BooleanArrayMap(Object[] key,
boolean[] value)
Creates a new empty array map with given key and value backing arrays. |
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Object2BooleanArrayMap(Object[] key,
boolean[] 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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Object2BooleanArrayMap(Object2BooleanMap<K> 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(Object k)
Checks whether the given value is contained in AbstractObject2BooleanMap.keySet() . |
boolean |
containsValue(boolean v)
Checks whether the given value is contained in AbstractObject2BooleanMap.values() . |
boolean |
getBoolean(Object k)
Returns the value to which the given key is mapped. |
boolean |
isEmpty()
|
ObjectSet<K> |
keySet()
Returns a type-specific-set view of the keys of this map. |
Object2BooleanMap.FastEntrySet<K> |
object2BooleanEntrySet()
Returns a type-specific set view of the mappings contained in this map. |
boolean |
put(K k,
boolean v)
Adds a pair to the map. |
boolean |
removeBoolean(Object 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. |
BooleanCollection |
values()
Returns a type-specific-set view of the values of this map. |
Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2BooleanMap |
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containsValue, entrySet, equals, hashCode, putAll, toString |
Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2BooleanFunction |
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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.objects.Object2BooleanFunction |
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defaultReturnValue, defaultReturnValue |
Methods inherited from interface it.unimi.dsi.fastutil.Function |
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get, put, remove |
Methods inherited from interface java.util.Map |
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get, put, remove |
Constructor Detail |
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public Object2BooleanArrayMap(Object[] key, boolean[] value)
key
- the key array.value
- the value array (it must have the same length as key
).public Object2BooleanArrayMap()
public Object2BooleanArrayMap(int capacity)
capacity
- the initial capacity.public Object2BooleanArrayMap(Object2BooleanMap<K> m)
m
- a map.public Object2BooleanArrayMap(Object[] key, boolean[] 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 Object2BooleanMap.FastEntrySet<K> object2BooleanEntrySet()
Object2BooleanMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Object2BooleanMap.entrySet()
so that it returns an ObjectSet
of objects of type Object2BooleanMap.Entry
(the latter makes it possible to
access keys and values with type-specific methods).
object2BooleanEntrySet
in interface Object2BooleanMap<K>
Object2BooleanMap.entrySet()
public boolean getBoolean(Object k)
Object2BooleanFunction
getBoolean
in interface Object2BooleanFunction<K>
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<K,Boolean>
size
in interface Map<K,Boolean>
public void clear()
Function
clear
in interface Function<K,Boolean>
clear
in interface Map<K,Boolean>
clear
in class AbstractObject2BooleanFunction<K>
Map.clear()
public boolean containsKey(Object k)
AbstractObject2BooleanMap
AbstractObject2BooleanMap.keySet()
.
containsKey
in interface Function<K,Boolean>
containsKey
in interface Map<K,Boolean>
containsKey
in class AbstractObject2BooleanMap<K>
k
- the key.
key
.Map.containsKey(Object)
public boolean containsValue(boolean v)
AbstractObject2BooleanMap
AbstractObject2BooleanMap.values()
.
containsValue
in interface Object2BooleanMap<K>
containsValue
in class AbstractObject2BooleanMap<K>
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface Map<K,Boolean>
isEmpty
in class AbstractObject2BooleanMap<K>
public boolean put(K k, boolean v)
Object2BooleanFunction
put
in interface Object2BooleanFunction<K>
put
in class AbstractObject2BooleanFunction<K>
k
- the key.v
- the value.
Function.put(Object,Object)
public boolean removeBoolean(Object k)
Object2BooleanFunction
removeBoolean
in interface Object2BooleanFunction<K>
removeBoolean
in class AbstractObject2BooleanFunction<K>
Function.remove(Object)
public ObjectSet<K> keySet()
AbstractObject2BooleanMap
The view is backed by the set returned by AbstractObject2BooleanMap.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 Object2BooleanMap<K>
keySet
in interface Map<K,Boolean>
keySet
in class AbstractObject2BooleanMap<K>
Map.keySet()
public BooleanCollection values()
AbstractObject2BooleanMap
The view is backed by the set returned by AbstractObject2BooleanMap.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 Object2BooleanMap<K>
values
in interface Map<K,Boolean>
values
in class AbstractObject2BooleanMap<K>
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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