public class Double2BooleanArrayMap extends AbstractDouble2BooleanMap 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.
AbstractDouble2BooleanMap.BasicEntry
Double2BooleanMap.Entry, Double2BooleanMap.FastEntrySet
Constructor and Description |
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Double2BooleanArrayMap()
Creates a new empty array map.
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Double2BooleanArrayMap(double[] key,
boolean[] value)
Creates a new empty array map with given key and value backing arrays.
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Double2BooleanArrayMap(double[] 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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Double2BooleanArrayMap(Double2BooleanMap m)
Creates a new empty array map copying the entries of a given map.
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Double2BooleanArrayMap(int capacity)
Creates a new empty array map of given capacity.
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Double2BooleanArrayMap(java.util.Map<? extends java.lang.Double,? extends java.lang.Boolean> 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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Double2BooleanArrayMap |
clone()
Returns a deep copy of this map.
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boolean |
containsKey(double k)
Checks whether the given value is contained in
AbstractDouble2BooleanMap.keySet() . |
boolean |
containsValue(boolean v)
Checks whether the given value is contained in
AbstractDouble2BooleanMap.values() . |
Double2BooleanMap.FastEntrySet |
double2BooleanEntrySet()
Returns a type-specific set view of the mappings contained in this map.
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boolean |
get(double k)
Returns the value to which the given key is mapped.
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boolean |
isEmpty() |
DoubleSet |
keySet()
Returns a type-specific-set view of the keys of this map.
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boolean |
put(double k,
boolean v)
Adds a pair to the map.
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boolean |
remove(double 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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BooleanCollection |
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 Double2BooleanArrayMap(double[] key, boolean[] 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 Double2BooleanArrayMap()
public Double2BooleanArrayMap(int capacity)
capacity
- the initial capacity.public Double2BooleanArrayMap(Double2BooleanMap m)
m
- a map.public Double2BooleanArrayMap(java.util.Map<? extends java.lang.Double,? extends java.lang.Boolean> m)
m
- a map.public Double2BooleanArrayMap(double[] key, boolean[] 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 Double2BooleanMap.FastEntrySet double2BooleanEntrySet()
Double2BooleanMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Double2BooleanMap.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).
double2BooleanEntrySet
in interface Double2BooleanMap
Double2BooleanMap.entrySet()
public boolean get(double k)
Double2BooleanFunction
get
in interface Double2BooleanFunction
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.Double,java.lang.Boolean>
clear
in interface java.util.Map<java.lang.Double,java.lang.Boolean>
clear
in class AbstractDouble2BooleanFunction
Map.clear()
public boolean containsKey(double k)
AbstractDouble2BooleanMap
AbstractDouble2BooleanMap.keySet()
.containsKey
in interface Double2BooleanFunction
containsKey
in class AbstractDouble2BooleanMap
Function.containsKey(Object)
public boolean containsValue(boolean v)
AbstractDouble2BooleanMap
AbstractDouble2BooleanMap.values()
.containsValue
in interface Double2BooleanMap
containsValue
in class AbstractDouble2BooleanMap
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface java.util.Map<java.lang.Double,java.lang.Boolean>
isEmpty
in class AbstractDouble2BooleanMap
public boolean put(double k, boolean v)
Double2BooleanFunction
put
in interface Double2BooleanFunction
put
in class AbstractDouble2BooleanFunction
k
- the key.v
- the value.Function.put(Object,Object)
public boolean remove(double k)
Double2BooleanFunction
remove
in interface Double2BooleanFunction
remove
in class AbstractDouble2BooleanFunction
k
- the key.Function.remove(Object)
public DoubleSet keySet()
AbstractDouble2BooleanMap
The view is backed by the set returned by AbstractDouble2BooleanMap.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 Double2BooleanMap
keySet
in interface java.util.Map<java.lang.Double,java.lang.Boolean>
keySet
in class AbstractDouble2BooleanMap
Map.keySet()
public BooleanCollection values()
AbstractDouble2BooleanMap
The view is backed by the set returned by AbstractDouble2BooleanMap.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 Double2BooleanMap
values
in interface java.util.Map<java.lang.Double,java.lang.Boolean>
values
in class AbstractDouble2BooleanMap
Map.values()
public Double2BooleanArrayMap 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