public class Int2ReferenceArrayMap<V> extends AbstractInt2ReferenceMap<V> implements Serializable, 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.
AbstractInt2ReferenceMap.BasicEntry<V>Int2ReferenceMap.Entry<V>, Int2ReferenceMap.FastEntrySet<V>| Constructor and Description |
|---|
Int2ReferenceArrayMap()
Creates a new empty array map.
|
Int2ReferenceArrayMap(int capacity)
Creates a new empty array map of given capacity.
|
Int2ReferenceArrayMap(int[] key,
Object[] value)
Creates a new empty array map with given key and value backing arrays.
|
Int2ReferenceArrayMap(int[] key,
Object[] value,
int size)
Creates a new array map with given key and value backing arrays, using the given number of elements.
|
Int2ReferenceArrayMap(Int2ReferenceMap<V> m)
Creates a new empty array map copying the entries of a given map.
|
Int2ReferenceArrayMap(Map<? extends Integer,? extends V> m)
Creates a new empty array map copying the entries of a given map.
|
| Modifier and Type | Method and Description |
|---|---|
void |
clear()
Removes all associations from this function (optional operation).
|
Int2ReferenceArrayMap<V> |
clone()
Returns a deep copy of this map.
|
boolean |
containsKey(int k)
Checks whether the given value is contained in
AbstractInt2ReferenceMap.keySet(). |
boolean |
containsValue(Object v)
Checks whether the given value is contained in
AbstractInt2ReferenceMap.values(). |
V |
get(int k)
Returns the value to which the given key is mapped.
|
Int2ReferenceMap.FastEntrySet<V> |
int2ReferenceEntrySet()
Returns a type-specific set view of the mappings contained in this map.
|
boolean |
isEmpty() |
IntSet |
keySet()
Returns a type-specific-set view of the keys of this map.
|
V |
put(int k,
V v)
Adds a pair to the map.
|
V |
remove(int 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.
|
ReferenceCollection<V> |
values()
Returns a type-specific-set view of the values of this map.
|
entrySet, equals, hashCode, putAll, toStringcontainsKey, defaultReturnValue, defaultReturnValue, get, put, removedefaultReturnValue, defaultReturnValuecontainsKey, get, put, removecompute, computeIfAbsent, computeIfPresent, containsKey, forEach, get, getOrDefault, merge, put, putIfAbsent, remove, remove, replace, replace, replaceAllpublic Int2ReferenceArrayMap(int[] key,
Object[] 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 Int2ReferenceArrayMap()
public Int2ReferenceArrayMap(int capacity)
capacity - the initial capacity.public Int2ReferenceArrayMap(Int2ReferenceMap<V> m)
m - a map.public Int2ReferenceArrayMap(Map<? extends Integer,? extends V> m)
m - a map.public Int2ReferenceArrayMap(int[] key,
Object[] 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 Int2ReferenceMap.FastEntrySet<V> int2ReferenceEntrySet()
Int2ReferenceMapThis method is necessary because there is no inheritance along type parameters: it is thus impossible to strengthen Int2ReferenceMap.entrySet() so that it returns an
ObjectSet of objects of type Map.Entry (the latter makes it possible to access keys and values with type-specific methods).
int2ReferenceEntrySet in interface Int2ReferenceMap<V>Int2ReferenceMap.entrySet()public V get(int k)
Int2ReferenceFunctionget in interface Int2ReferenceFunction<V>k - the key.Function.get(Object)public int size()
FunctionMost 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()
Functionpublic boolean containsKey(int k)
AbstractInt2ReferenceMapAbstractInt2ReferenceMap.keySet().containsKey in interface Int2ReferenceFunction<V>containsKey in class AbstractInt2ReferenceMap<V>Function.containsKey(Object)public boolean containsValue(Object v)
AbstractInt2ReferenceMapAbstractInt2ReferenceMap.values().containsValue in interface Map<Integer,V>containsValue in class AbstractInt2ReferenceMap<V>public boolean isEmpty()
public V put(int k, V v)
Int2ReferenceFunctionput in interface Int2ReferenceFunction<V>put in class AbstractInt2ReferenceFunction<V>k - the key.v - the value.Function.put(Object,Object)public V remove(int k)
Int2ReferenceFunctionremove in interface Int2ReferenceFunction<V>remove in class AbstractInt2ReferenceFunction<V>k - the key.Function.remove(Object)public IntSet keySet()
AbstractInt2ReferenceMapThe view is backed by the set returned by AbstractInt2ReferenceMap.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 Int2ReferenceMap<V>keySet in interface Map<Integer,V>keySet in class AbstractInt2ReferenceMap<V>Map.keySet()public ReferenceCollection<V> values()
AbstractInt2ReferenceMapThe view is backed by the set returned by AbstractInt2ReferenceMap.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 Int2ReferenceMap<V>values in interface Map<Integer,V>values in class AbstractInt2ReferenceMap<V>Map.values()public Int2ReferenceArrayMap<V> 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.