public class Long2ObjectArrayMap<V> extends AbstractLong2ObjectMap<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.
AbstractLong2ObjectMap.BasicEntry<V>Long2ObjectMap.Entry<V>, Long2ObjectMap.FastEntrySet<V>defRetValue| Constructor and Description |
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Long2ObjectArrayMap()
Creates a new empty array map.
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Long2ObjectArrayMap(int capacity)
Creates a new empty array map of given capacity.
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Long2ObjectArrayMap(long[] key,
Object[] value)
Creates a new empty array map with given key and value backing arrays.
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Long2ObjectArrayMap(long[] key,
Object[] 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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Long2ObjectArrayMap(Long2ObjectMap<V> m)
Creates a new empty array map copying the entries of a given map.
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Long2ObjectArrayMap(Map<? extends Long,? extends V> m)
Creates a new empty array map copying the entries of a given map.
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| Modifier and Type | Method and Description |
|---|---|
void |
clear()
Removes all associations from this function (optional operation).
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Long2ObjectArrayMap<V> |
clone()
Returns a deep copy of this map.
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boolean |
containsKey(long k)
Checks whether the given value is contained in
AbstractLong2ObjectMap.keySet(). |
boolean |
containsValue(Object v)
Checks whether the given value is contained in
AbstractLong2ObjectMap.values(). |
V |
get(long k)
Returns the value to which the given key is mapped.
|
boolean |
isEmpty() |
LongSet |
keySet()
Returns a type-specific-set view of the keys of this map.
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Long2ObjectMap.FastEntrySet<V> |
long2ObjectEntrySet()
Returns a type-specific set view of the mappings contained in this map.
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V |
put(long k,
V v)
Adds a pair to the map.
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V |
remove(long 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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ObjectCollection<V> |
values()
Returns a type-specific-set view of the values of this map.
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entrySet, equals, hashCode, putAll, toStringcontainsKey, defaultReturnValue, defaultReturnValue, get, put, removefinalize, getClass, notify, notifyAll, wait, wait, waitdefaultReturnValue, defaultReturnValuecontainsKey, get, put, removecontainsKey, get, put, removepublic Long2ObjectArrayMap(long[] 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 Long2ObjectArrayMap()
public Long2ObjectArrayMap(int capacity)
capacity - the initial capacity.public Long2ObjectArrayMap(Long2ObjectMap<V> m)
m - a map.public Long2ObjectArrayMap(Map<? extends Long,? extends V> m)
m - a map.public Long2ObjectArrayMap(long[] 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 Long2ObjectMap.FastEntrySet<V> long2ObjectEntrySet()
Long2ObjectMapThis method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Long2ObjectMap.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).
long2ObjectEntrySet in interface Long2ObjectMap<V>Long2ObjectMap.entrySet()public V get(long k)
Long2ObjectFunctionget in interface Long2ObjectFunction<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(long k)
AbstractLong2ObjectMapAbstractLong2ObjectMap.keySet().containsKey in interface Long2ObjectFunction<V>containsKey in class AbstractLong2ObjectMap<V>Function.containsKey(Object)public boolean containsValue(Object v)
AbstractLong2ObjectMapAbstractLong2ObjectMap.values().containsValue in interface Map<Long,V>containsValue in class AbstractLong2ObjectMap<V>public boolean isEmpty()
public V put(long k, V v)
Long2ObjectFunctionput in interface Long2ObjectFunction<V>put in class AbstractLong2ObjectFunction<V>k - the key.v - the value.Function.put(Object,Object)public V remove(long k)
Long2ObjectFunctionremove in interface Long2ObjectFunction<V>remove in class AbstractLong2ObjectFunction<V>Function.remove(Object)public LongSet keySet()
AbstractLong2ObjectMapThe view is backed by the set returned by AbstractLong2ObjectMap.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 Long2ObjectMap<V>keySet in interface Map<Long,V>keySet in class AbstractLong2ObjectMap<V>Map.keySet()public ObjectCollection<V> values()
AbstractLong2ObjectMapThe view is backed by the set returned by AbstractLong2ObjectMap.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 Long2ObjectMap<V>values in interface Map<Long,V>values in class AbstractLong2ObjectMap<V>Map.values()public Long2ObjectArrayMap<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.
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