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java.lang.Objectit.unimi.dsi.fastutil.doubles.AbstractDouble2LongFunction
it.unimi.dsi.fastutil.doubles.AbstractDouble2LongMap
it.unimi.dsi.fastutil.doubles.Double2LongArrayMap
public class Double2LongArrayMap
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.doubles.AbstractDouble2LongMap |
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AbstractDouble2LongMap.BasicEntry |
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.doubles.Double2LongMap |
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Double2LongMap.Entry, Double2LongMap.FastEntrySet |
Constructor Summary | |
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Double2LongArrayMap()
Creates a new empty array map. |
|
Double2LongArrayMap(double[] key,
long[] value)
Creates a new empty array map with given key and value backing arrays. |
|
Double2LongArrayMap(double[] key,
long[] 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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Double2LongArrayMap(Double2LongMap m)
Creates a new empty array map copying the entries of a given map. |
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Double2LongArrayMap(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(double k)
Checks whether the given value is contained in AbstractDouble2LongMap.keySet() . |
boolean |
containsValue(long v)
Checks whether the given value is contained in AbstractDouble2LongMap.values() . |
Double2LongMap.FastEntrySet |
double2LongEntrySet()
Returns a type-specific set view of the mappings contained in this map. |
long |
get(double k)
Returns the value to which the given key is mapped. |
boolean |
isEmpty()
|
DoubleSet |
keySet()
Returns a type-specific-set view of the keys of this map. |
long |
put(double k,
long v)
Adds a pair to the map. |
long |
remove(double 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. |
LongCollection |
values()
Returns a type-specific-set view of the values of this map. |
Methods inherited from class it.unimi.dsi.fastutil.doubles.AbstractDouble2LongMap |
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containsValue, entrySet, equals, hashCode, putAll, toString |
Methods inherited from class it.unimi.dsi.fastutil.doubles.AbstractDouble2LongFunction |
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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.doubles.Double2LongFunction |
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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 Double2LongArrayMap(double[] key, long[] value)
key
- the key array.value
- the value array (it must have the same length as key
).public Double2LongArrayMap()
public Double2LongArrayMap(int capacity)
capacity
- the initial capacity.public Double2LongArrayMap(Double2LongMap m)
m
- a map.public Double2LongArrayMap(double[] key, long[] 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 Double2LongMap.FastEntrySet double2LongEntrySet()
Double2LongMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Double2LongMap.entrySet()
so that it returns an ObjectSet
of objects of type Double2LongMap.Entry
(the latter makes it possible to
access keys and values with type-specific methods).
double2LongEntrySet
in interface Double2LongMap
Double2LongMap.entrySet()
public long get(double k)
Double2LongFunction
get
in interface Double2LongFunction
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<Double,Long>
size
in interface Map<Double,Long>
public void clear()
Function
clear
in interface Function<Double,Long>
clear
in interface Map<Double,Long>
clear
in class AbstractDouble2LongFunction
Map.clear()
public boolean containsKey(double k)
AbstractDouble2LongMap
AbstractDouble2LongMap.keySet()
.
containsKey
in interface Double2LongFunction
containsKey
in class AbstractDouble2LongMap
Function.containsKey(Object)
public boolean containsValue(long v)
AbstractDouble2LongMap
AbstractDouble2LongMap.values()
.
containsValue
in interface Double2LongMap
containsValue
in class AbstractDouble2LongMap
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface Map<Double,Long>
isEmpty
in class AbstractDouble2LongMap
public long put(double k, long v)
Double2LongFunction
put
in interface Double2LongFunction
put
in class AbstractDouble2LongFunction
k
- the key.v
- the value.
Function.put(Object,Object)
public long remove(double k)
Double2LongFunction
remove
in interface Double2LongFunction
remove
in class AbstractDouble2LongFunction
Function.remove(Object)
public DoubleSet keySet()
AbstractDouble2LongMap
The view is backed by the set returned by AbstractDouble2LongMap.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 Double2LongMap
keySet
in interface Map<Double,Long>
keySet
in class AbstractDouble2LongMap
Map.keySet()
public LongCollection values()
AbstractDouble2LongMap
The view is backed by the set returned by AbstractDouble2LongMap.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 Double2LongMap
values
in interface Map<Double,Long>
values
in class AbstractDouble2LongMap
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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