public class Reference2LongArrayMap<K> extends AbstractReference2LongMap<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.
AbstractReference2LongMap.BasicEntry<K>, AbstractReference2LongMap.BasicEntrySet<K>
Reference2LongMap.Entry<K>, Reference2LongMap.FastEntrySet<K>
Constructor and Description |
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Reference2LongArrayMap()
Creates a new empty array map.
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Reference2LongArrayMap(int capacity)
Creates a new empty array map of given capacity.
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Reference2LongArrayMap(java.util.Map<? extends K,? extends java.lang.Long> m)
Creates a new empty array map copying the entries of a given map.
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Reference2LongArrayMap(java.lang.Object[] key,
long[] value)
Creates a new empty array map with given key and value backing arrays.
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Reference2LongArrayMap(java.lang.Object[] key,
long[] 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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Reference2LongArrayMap(Reference2LongMap<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 of the mappings from this map (optional operation).
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Reference2LongArrayMap<K> |
clone()
Returns a deep copy of this map.
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boolean |
containsKey(java.lang.Object k)
Returns true if this function contains a mapping for the specified key.
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boolean |
containsValue(long v)
Returns
true if this map maps one or more keys to the specified value. |
long |
getLong(java.lang.Object k)
Returns the value to which the given key is mapped.
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boolean |
isEmpty() |
ReferenceSet<K> |
keySet()
Returns a type-specific-set view of the keys of this map.
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long |
put(K k,
long v)
Adds a pair to the map (optional operation).
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Reference2LongMap.FastEntrySet<K> |
reference2LongEntrySet()
Returns a type-specific set view of the mappings contained in this map.
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long |
removeLong(java.lang.Object k)
Removes the mapping with the given key (optional operation).
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int |
size()
Returns the number of key/value mappings in this map.
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LongCollection |
values()
Returns a type-specific-set view of the values of this map.
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equals, hashCode, mergeLong, putAll, toString
defaultReturnValue, defaultReturnValue
computeIfAbsent, computeIfAbsent, computeLong, computeLongIfAbsent, computeLongIfAbsentPartial, computeLongIfPresent, containsValue, defaultReturnValue, defaultReturnValue, entrySet, forEach, get, getOrDefault, getOrDefault, merge, merge, mergeLong, mergeLong, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace
andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsLong, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort
public Reference2LongArrayMap(java.lang.Object[] key, long[] 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 Reference2LongArrayMap()
public Reference2LongArrayMap(int capacity)
capacity
- the initial capacity.public Reference2LongArrayMap(Reference2LongMap<K> m)
m
- a map.public Reference2LongArrayMap(java.util.Map<? extends K,? extends java.lang.Long> m)
m
- a map.public Reference2LongArrayMap(java.lang.Object[] key, long[] 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 Reference2LongMap.FastEntrySet<K> reference2LongEntrySet()
Reference2LongMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Map.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).
reference2LongEntrySet
in interface Reference2LongMap<K>
Map.entrySet()
public long getLong(java.lang.Object k)
Reference2LongFunction
getLong
in interface Reference2LongFunction<K>
k
- the key.Function.get(Object)
public int size()
Reference2LongMap
Integer.MAX_VALUE
elements, returns Integer.MAX_VALUE
.size
in interface Reference2LongMap<K>
size
in interface java.util.Map<K,java.lang.Long>
Size64
public void clear()
Reference2LongMap
clear
in interface Reference2LongMap<K>
clear
in interface java.util.Map<K,java.lang.Long>
Map.clear()
public boolean containsKey(java.lang.Object k)
AbstractReference2LongMap
containsKey
in interface Reference2LongMap<K>
containsKey
in interface java.util.Map<K,java.lang.Long>
containsKey
in class AbstractReference2LongMap<K>
k
- the key.key
.Map.containsKey(Object)
public boolean containsValue(long v)
AbstractReference2LongMap
true
if this map maps one or more keys to the specified value.containsValue
in interface Reference2LongMap<K>
containsValue
in class AbstractReference2LongMap<K>
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface java.util.Map<K,java.lang.Long>
isEmpty
in class AbstractReference2LongMap<K>
public long put(K k, long v)
Reference2LongFunction
put
in interface Reference2LongFunction<K>
k
- the key.v
- the value.Function.put(Object,Object)
public long removeLong(java.lang.Object k)
Reference2LongFunction
removeLong
in interface Reference2LongFunction<K>
k
- the key.Function.remove(Object)
public ReferenceSet<K> keySet()
AbstractReference2LongMap
The view is backed by the set returned by Map.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 Reference2LongMap<K>
keySet
in interface java.util.Map<K,java.lang.Long>
keySet
in class AbstractReference2LongMap<K>
Map.keySet()
public LongCollection values()
AbstractReference2LongMap
The view is backed by the set returned by Map.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 Reference2LongMap<K>
values
in interface java.util.Map<K,java.lang.Long>
values
in class AbstractReference2LongMap<K>
Map.values()
public Reference2LongArrayMap<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