public class Object2IntArrayMap<K> extends AbstractObject2IntMap<K> 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.
AbstractObject2IntMap.BasicEntry<K>
Object2IntMap.Entry<K>, Object2IntMap.FastEntrySet<K>
Constructor and Description |
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Object2IntArrayMap()
Creates a new empty array map.
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Object2IntArrayMap(int capacity)
Creates a new empty array map of given capacity.
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Object2IntArrayMap(java.util.Map<? extends K,? extends java.lang.Integer> m)
Creates a new empty array map copying the entries of a given map.
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Object2IntArrayMap(java.lang.Object[] key,
int[] value)
Creates a new empty array map with given key and value backing arrays.
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Object2IntArrayMap(java.lang.Object[] key,
int[] 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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Object2IntArrayMap(Object2IntMap<K> 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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Object2IntArrayMap<K> |
clone()
Returns a deep copy of this map.
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boolean |
containsKey(java.lang.Object k)
Checks whether the given value is contained in
AbstractObject2IntMap.keySet() . |
boolean |
containsValue(int v)
Checks whether the given value is contained in
AbstractObject2IntMap.values() . |
int |
getInt(java.lang.Object k)
Returns the value to which the given key is mapped.
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boolean |
isEmpty() |
ObjectSet<K> |
keySet()
Returns a type-specific-set view of the keys of this map.
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Object2IntMap.FastEntrySet<K> |
object2IntEntrySet()
Returns a type-specific set view of the mappings contained in this map.
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int |
put(K k,
int v)
Adds a pair to the map.
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int |
removeInt(java.lang.Object 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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IntCollection |
values()
Returns a type-specific-set view of the values of this map.
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containsValue, entrySet, equals, hashCode, putAll, toString
defaultReturnValue, defaultReturnValue, get, put, remove
defaultReturnValue, defaultReturnValue
public Object2IntArrayMap(java.lang.Object[] key, int[] 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 Object2IntArrayMap()
public Object2IntArrayMap(int capacity)
capacity
- the initial capacity.public Object2IntArrayMap(Object2IntMap<K> m)
m
- a map.public Object2IntArrayMap(java.util.Map<? extends K,? extends java.lang.Integer> m)
m
- a map.public Object2IntArrayMap(java.lang.Object[] key, int[] 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 Object2IntMap.FastEntrySet<K> object2IntEntrySet()
Object2IntMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Object2IntMap.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).
object2IntEntrySet
in interface Object2IntMap<K>
Object2IntMap.entrySet()
public int getInt(java.lang.Object k)
Object2IntFunction
getInt
in interface Object2IntFunction<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.
public void clear()
Function
public boolean containsKey(java.lang.Object k)
AbstractObject2IntMap
AbstractObject2IntMap.keySet()
.containsKey
in interface Function<K,java.lang.Integer>
containsKey
in interface java.util.Map<K,java.lang.Integer>
containsKey
in class AbstractObject2IntMap<K>
k
- the key.key
.Map.containsKey(Object)
public boolean containsValue(int v)
AbstractObject2IntMap
AbstractObject2IntMap.values()
.containsValue
in interface Object2IntMap<K>
containsValue
in class AbstractObject2IntMap<K>
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface java.util.Map<K,java.lang.Integer>
isEmpty
in class AbstractObject2IntMap<K>
public int put(K k, int v)
Object2IntFunction
put
in interface Object2IntFunction<K>
put
in class AbstractObject2IntFunction<K>
k
- the key.v
- the value.Function.put(Object,Object)
public int removeInt(java.lang.Object k)
Object2IntFunction
removeInt
in interface Object2IntFunction<K>
removeInt
in class AbstractObject2IntFunction<K>
k
- the key.Function.remove(Object)
public ObjectSet<K> keySet()
AbstractObject2IntMap
The view is backed by the set returned by AbstractObject2IntMap.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 Object2IntMap<K>
keySet
in interface java.util.Map<K,java.lang.Integer>
keySet
in class AbstractObject2IntMap<K>
Map.keySet()
public IntCollection values()
AbstractObject2IntMap
The view is backed by the set returned by AbstractObject2IntMap.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 Object2IntMap<K>
values
in interface java.util.Map<K,java.lang.Integer>
values
in class AbstractObject2IntMap<K>
Map.values()
public Object2IntArrayMap<K> 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