public class Int2DoubleArrayMap extends AbstractInt2DoubleMap implements java.io.Serializable, java.lang.Cloneable
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.
AbstractInt2DoubleMap.BasicEntry
Int2DoubleMap.Entry, Int2DoubleMap.FastEntrySet
Constructor and Description |
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Int2DoubleArrayMap()
Creates a new empty array map.
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Int2DoubleArrayMap(int capacity)
Creates a new empty array map of given capacity.
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Int2DoubleArrayMap(int[] key,
double[] value)
Creates a new empty array map with given key and value backing arrays.
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Int2DoubleArrayMap(int[] key,
double[] 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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Int2DoubleArrayMap(Int2DoubleMap m)
Creates a new empty array map copying the entries of a given map.
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Int2DoubleArrayMap(java.util.Map<? extends java.lang.Integer,? extends java.lang.Double> m)
Creates a new empty array map copying the entries of a given map.
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Modifier and Type | Method and Description |
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void |
clear()
Removes all associations from this function (optional operation).
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Int2DoubleArrayMap |
clone()
Returns a deep copy of this map.
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boolean |
containsKey(int k)
Checks whether the given value is contained in
AbstractInt2DoubleMap.keySet() . |
boolean |
containsValue(double v)
Checks whether the given value is contained in
AbstractInt2DoubleMap.values() . |
double |
get(int k)
Returns the value to which the given key is mapped.
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Int2DoubleMap.FastEntrySet |
int2DoubleEntrySet()
Returns a type-specific set view of the mappings contained in this map.
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boolean |
isEmpty() |
IntSet |
keySet()
Returns a type-specific-set view of the keys of this map.
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double |
put(int k,
double v)
Adds a pair to the map.
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double |
remove(int k)
Removes the mapping with the given key.
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int |
size()
Returns the intended number of keys in this function, or -1 if no such number exists.
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DoubleCollection |
values()
Returns a type-specific-set view of the values of this map.
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containsValue, entrySet, equals, hashCode, putAll, toString
containsKey, defaultReturnValue, defaultReturnValue, get, put, remove
defaultReturnValue, defaultReturnValue
containsKey, get, put, remove
public Int2DoubleArrayMap(int[] key, double[] value)
It is responsibility of the caller that the elements of key
are distinct.
key
- the key array.value
- the value array (it must have the same length as key
).public Int2DoubleArrayMap()
public Int2DoubleArrayMap(int capacity)
capacity
- the initial capacity.public Int2DoubleArrayMap(Int2DoubleMap m)
m
- a map.public Int2DoubleArrayMap(java.util.Map<? extends java.lang.Integer,? extends java.lang.Double> m)
m
- a map.public Int2DoubleArrayMap(int[] key, double[] value, int size)
It is responsibility of the caller that the first size
elements of key
are distinct.
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
.public Int2DoubleMap.FastEntrySet int2DoubleEntrySet()
Int2DoubleMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Int2DoubleMap.entrySet()
so that it returns an ObjectSet
of type-specific entries (the latter makes it possible to
access keys and values with type-specific methods).
int2DoubleEntrySet
in interface Int2DoubleMap
Int2DoubleMap.entrySet()
public double get(int k)
Int2DoubleFunction
get
in interface Int2DoubleFunction
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.
public void clear()
Function
clear
in interface Function<java.lang.Integer,java.lang.Double>
clear
in interface java.util.Map<java.lang.Integer,java.lang.Double>
clear
in class AbstractInt2DoubleFunction
Map.clear()
public boolean containsKey(int k)
AbstractInt2DoubleMap
AbstractInt2DoubleMap.keySet()
.containsKey
in interface Int2DoubleFunction
containsKey
in class AbstractInt2DoubleMap
Function.containsKey(Object)
public boolean containsValue(double v)
AbstractInt2DoubleMap
AbstractInt2DoubleMap.values()
.containsValue
in interface Int2DoubleMap
containsValue
in class AbstractInt2DoubleMap
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface java.util.Map<java.lang.Integer,java.lang.Double>
isEmpty
in class AbstractInt2DoubleMap
public double put(int k, double v)
Int2DoubleFunction
put
in interface Int2DoubleFunction
put
in class AbstractInt2DoubleFunction
k
- the key.v
- the value.Function.put(Object,Object)
public double remove(int k)
Int2DoubleFunction
remove
in interface Int2DoubleFunction
remove
in class AbstractInt2DoubleFunction
k
- the key.Function.remove(Object)
public IntSet keySet()
AbstractInt2DoubleMap
The view is backed by the set returned by AbstractInt2DoubleMap.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 Int2DoubleMap
keySet
in interface java.util.Map<java.lang.Integer,java.lang.Double>
keySet
in class AbstractInt2DoubleMap
Map.keySet()
public DoubleCollection values()
AbstractInt2DoubleMap
The view is backed by the set returned by AbstractInt2DoubleMap.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 Int2DoubleMap
values
in interface java.util.Map<java.lang.Integer,java.lang.Double>
values
in class AbstractInt2DoubleMap
Map.values()
public Int2DoubleArrayMap 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