public interface Long2IntMap extends Long2IntFunction, java.util.Map<java.lang.Long,java.lang.Integer>
Map
; provides some additional methods that use polymorphism to avoid (un)boxing, and handling of a default return value.
Besides extending the corresponding type-specific function, this interface strengthens Map.entrySet()
,
keySet()
and values()
. Moreover, a number of methods, such as size()
, defaultReturnValue()
, etc., are un-defaulted
as their function default do not make sense for a map.
Maps returning entry sets of type Long2IntMap.FastEntrySet
support also fast iteration.
A submap or subset may or may not have an independent default return value (which however must be initialized to the default return value of the originator).
Map
Modifier and Type | Interface and Description |
---|---|
static interface |
Long2IntMap.Entry
A type-specific
Map.Entry ; provides some additional methods
that use polymorphism to avoid (un)boxing. |
static interface |
Long2IntMap.FastEntrySet
An entry set providing fast iteration.
|
Modifier and Type | Method and Description |
---|---|
default void |
clear()
Removes all of the mappings from this map (optional operation).
|
default int |
compute(long key,
java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
Attempts to compute a mapping for the specified key and its current mapped value (or
null if there is no current mapping). |
default java.lang.Integer |
compute(java.lang.Long key,
java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
Deprecated.
Please use the corresponding type-specific method instead.
|
default java.lang.Integer |
computeIfAbsent(java.lang.Long key,
java.util.function.Function<? super java.lang.Long,? extends java.lang.Integer> mappingFunction)
Deprecated.
Please use the corresponding type-specific method instead.
|
default int |
computeIfAbsent(long key,
Long2IntFunction mappingFunction)
If the specified key is not already associated with a value, attempts to compute its value
using the given mapping function and enters it into this map, unless the key is not present
in the given mapping function.
|
default int |
computeIfAbsent(long key,
java.util.function.LongToIntFunction mappingFunction)
If the specified key is not already associated with a value, attempts to compute its value
using the given mapping function and enters it into this map.
|
default int |
computeIfAbsentNullable(long key,
java.util.function.LongFunction<? extends java.lang.Integer> mappingFunction)
If the specified key is not already associated with a value, attempts to compute its value
using the given mapping function and enters it into this map unless it is
null . |
default int |
computeIfAbsentPartial(long key,
Long2IntFunction mappingFunction)
Deprecated.
Please use
computeIfAbsent() instead. |
default int |
computeIfPresent(long key,
java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.
|
default java.lang.Integer |
computeIfPresent(java.lang.Long key,
java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
Deprecated.
Please use the corresponding type-specific method instead.
|
boolean |
containsKey(long key)
Returns true if this function contains a mapping for the specified key.
|
default boolean |
containsKey(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
boolean |
containsValue(int value)
Returns
true if this map maps one or more keys to the specified value. |
default boolean |
containsValue(java.lang.Object value)
Deprecated.
Please use the corresponding type-specific method instead.
|
int |
defaultReturnValue()
Gets the default return value.
|
void |
defaultReturnValue(int rv)
Sets the default return value (optional operation).
|
default ObjectSet<java.util.Map.Entry<java.lang.Long,java.lang.Integer>> |
entrySet()
Deprecated.
Please use the corresponding type-specific method instead.
|
default void |
forEach(java.util.function.BiConsumer<? super java.lang.Long,? super java.lang.Integer> consumer) |
default java.lang.Integer |
get(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
default int |
getOrDefault(long key,
int defaultValue)
Returns the value to which the specified key is mapped, or the
defaultValue if this
map contains no mapping for the key. |
default java.lang.Integer |
getOrDefault(java.lang.Object key,
java.lang.Integer defaultValue)
Deprecated.
Please use the corresponding type-specific method instead.
|
LongSet |
keySet() |
ObjectSet<Long2IntMap.Entry> |
long2IntEntrySet()
Returns a type-specific set view of the mappings contained in this map.
|
default int |
merge(long key,
int value,
java.util.function.BiFunction<? super java.lang.Integer,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
If the specified key is not already associated with a value, associates it with the given
value . |
default java.lang.Integer |
merge(java.lang.Long key,
java.lang.Integer value,
java.util.function.BiFunction<? super java.lang.Integer,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
Deprecated.
Please use the corresponding type-specific method instead.
|
default int |
mergeInt(long key,
int value,
java.util.function.IntBinaryOperator remappingFunction)
If the specified key is not already associated with a value, associates it with the given
value . |
default int |
mergeInt(long key,
int value,
IntBinaryOperator remappingFunction)
If the specified key is not already associated with a value, associates it with the given
value . |
default java.lang.Integer |
put(java.lang.Long key,
java.lang.Integer value)
Deprecated.
Please use the corresponding type-specific method instead.
|
default int |
putIfAbsent(long key,
int value)
If the specified key is not already associated with a value, associates it with the given
value and returns the default return value, else returns
the current value.
|
default java.lang.Integer |
putIfAbsent(java.lang.Long key,
java.lang.Integer value)
Deprecated.
Please use the corresponding type-specific method instead.
|
default boolean |
remove(long key,
int value)
Removes the entry for the specified key only if it is currently mapped to the specified value.
|
default java.lang.Integer |
remove(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
default boolean |
remove(java.lang.Object key,
java.lang.Object value)
Deprecated.
Please use the corresponding type-specific method instead.
|
default int |
replace(long key,
int value)
Replaces the entry for the specified key only if it is currently mapped to some value.
|
default java.lang.Integer |
replace(java.lang.Long key,
java.lang.Integer value)
Deprecated.
Please use the corresponding type-specific method instead.
|
default boolean |
replace(java.lang.Long key,
java.lang.Integer oldValue,
java.lang.Integer newValue)
Deprecated.
Please use the corresponding type-specific method instead.
|
default boolean |
replace(long key,
int oldValue,
int newValue)
Replaces the entry for the specified key only if currently mapped to the specified value.
|
int |
size()
Returns the number of key/value mappings in this map.
|
IntCollection |
values() |
andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsInt, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, put, remove
int size()
Integer.MAX_VALUE
elements, returns Integer.MAX_VALUE
.size
in interface java.util.Map<java.lang.Long,java.lang.Integer>
Size64
default void clear()
clear
in interface java.util.Map<java.lang.Long,java.lang.Integer>
java.lang.UnsupportedOperationException
- if the clear()
operation is not supported by this mapMap.clear()
void defaultReturnValue(int rv)
get()
,
put()
and remove()
to denote that the map does not contain
the specified key. It must be 0/false
by default.defaultReturnValue
in interface Long2IntFunction
rv
- the new default return value.defaultReturnValue()
int defaultReturnValue()
defaultReturnValue
in interface Long2IntFunction
ObjectSet<Long2IntMap.Entry> long2IntEntrySet()
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).
Map.entrySet()
@Deprecated default ObjectSet<java.util.Map.Entry<java.lang.Long,java.lang.Integer>> entrySet()
entrySet
in interface java.util.Map<java.lang.Long,java.lang.Integer>
Map.entrySet()
Map.entrySet()
.@Deprecated default java.lang.Integer put(java.lang.Long key, java.lang.Integer value)
This default implementation just delegates to the corresponding type-specific–function method.
put
in interface Long2IntFunction
put
in interface java.util.Map<java.lang.Long,java.lang.Integer>
key
- the key.value
- the value.null
if no value was present for the given key.Map.put(Object,Object)
@Deprecated default java.lang.Integer get(java.lang.Object key)
This default implementation just delegates to the corresponding type-specific–function method.
get
in interface Long2IntFunction
get
in interface java.util.Map<java.lang.Long,java.lang.Integer>
key
- the key.null
if no value was present for the given key.Map.get(Object)
@Deprecated default java.lang.Integer remove(java.lang.Object key)
This default implementation just delegates to the corresponding type-specific–function method.
remove
in interface Long2IntFunction
remove
in interface java.util.Map<java.lang.Long,java.lang.Integer>
key
- the key.null
if no value was present for the given key.Map.remove(Object)
LongSet keySet()
keySet
in interface java.util.Map<java.lang.Long,java.lang.Integer>
Map.keySet()
Map.keySet()
.IntCollection values()
values
in interface java.util.Map<java.lang.Long,java.lang.Integer>
Map.values()
Map.values()
.boolean containsKey(long key)
containsKey
in interface Long2IntFunction
key
- the key.key
.Map.containsKey(Object)
@Deprecated default boolean containsKey(java.lang.Object key)
This default implementation just delegates to the corresponding type-specific–function method.
containsKey
in interface Long2IntFunction
containsKey
in interface java.util.Map<java.lang.Long,java.lang.Integer>
key
- the key.key
.Map.containsKey(Object)
boolean containsValue(int value)
true
if this map maps one or more keys to the specified value.Map.containsValue(Object)
@Deprecated default boolean containsValue(java.lang.Object value)
containsValue
in interface java.util.Map<java.lang.Long,java.lang.Integer>
default void forEach(java.util.function.BiConsumer<? super java.lang.Long,? super java.lang.Integer> consumer)
forEach
in interface java.util.Map<java.lang.Long,java.lang.Integer>
default int getOrDefault(long key, int defaultValue)
defaultValue
if this
map contains no mapping for the key.getOrDefault
in interface Long2IntFunction
key
- the key.defaultValue
- the default mapping of the key.defaultValue
if this map contains no mapping for the key.Map.getOrDefault(Object, Object)
@Deprecated default java.lang.Integer getOrDefault(java.lang.Object key, java.lang.Integer defaultValue)
This default implementation just delegates to the corresponding Map
method.
getOrDefault
in interface Long2IntFunction
getOrDefault
in interface java.util.Map<java.lang.Long,java.lang.Integer>
key
- the key.defaultValue
- the default value to return if not present.defaultValue
if no value was present for the
given key.Map.getOrDefault(Object, Object)
default int putIfAbsent(long key, int value)
key
- key with which the specified value is to be associated.value
- value to be associated with the specified key.Map.putIfAbsent(Object, Object)
default boolean remove(long key, int value)
key
- key with which the specified value is associated.value
- value expected to be associated with the specified key.true
if the value was removed.Map.remove(Object, Object)
default boolean replace(long key, int oldValue, int newValue)
key
- key with which the specified value is associated.oldValue
- value expected to be associated with the specified key.newValue
- value to be associated with the specified key.true
if the value was replaced.Map.replace(Object, Object, Object)
default int replace(long key, int value)
key
- key with which the specified value is associated.value
- value to be associated with the specified key.Map.replace(Object, Object)
default int computeIfAbsent(long key, java.util.function.LongToIntFunction mappingFunction)
Note that contrarily to the default computeIfAbsent(),
it is not possible to not add a value for a given key, since the mappingFunction
cannot
return null
. If such a behavior is needed, please use the corresponding nullable version.
key
- key with which the specified value is to be associated.mappingFunction
- the function to compute a value.Map.computeIfAbsent(Object, java.util.function.Function)
computeIfAbsent()
methods have a different logic based on the argument;
no delegation is performed, contrarily to other superficially similar
methods such as Iterator.forEachRemaining(java.util.function.Consumer<? super E>)
or List.replaceAll(java.util.function.UnaryOperator<E>)
.default int computeIfAbsentNullable(long key, java.util.function.LongFunction<? extends java.lang.Integer> mappingFunction)
null
.
Note that this version of computeIfAbsent()
should be used only if you plan to return null
in the mapping function.
key
- key with which the specified value is to be associated.mappingFunction
- the function to compute a value.null
.Map.computeIfAbsent(Object, java.util.function.Function)
default int computeIfAbsent(long key, Long2IntFunction mappingFunction)
This version of computeIfAbsent()
uses a type-specific version of fastutil
's Function
.
Since Function
has a containsKey()
method, it is possible to avoid adding a key by having containsKey()
return false
for that key.
key
- key with which the specified value is to be associated.mappingFunction
- the function to compute a value.Map.computeIfAbsent(Object, java.util.function.Function)
computeIfAbsent()
methods have a different logic based on the argument;
no delegation is performed, contrarily to other superficially similar
methods such as Iterator.forEachRemaining(java.util.function.Consumer<? super E>)
or List.replaceAll(java.util.function.UnaryOperator<E>)
.@Deprecated default int computeIfAbsentPartial(long key, Long2IntFunction mappingFunction)
computeIfAbsent()
instead.default int computeIfPresent(long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
key
- key with which the specified value is to be associated.remappingFunction
- the function to compute a value.Map.computeIfPresent(Object, java.util.function.BiFunction)
default int compute(long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
null
if there is no current mapping).
If the function returns null
, the mapping is removed (or remains absent if initially absent).
If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.
key
- key with which the specified value is to be associated.remappingFunction
- the function to compute a value.Map.compute(Object, java.util.function.BiFunction)
default int merge(long key, int value, java.util.function.BiFunction<? super java.lang.Integer,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
value
.
Otherwise, replaces the associated value with the results of the given remapping function, or removes if the result is null
.key
- key with which the resulting value is to be associated.value
- the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.remappingFunction
- the function to recompute a value if present.Map.merge(Object, Object, java.util.function.BiFunction)
default int mergeInt(long key, int value, java.util.function.IntBinaryOperator remappingFunction)
value
.
Otherwise, replaces the associated value with the results of the given remapping function.key
- key with which the resulting value is to be associated.value
- the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.remappingFunction
- the function to recompute a value if present.Map.merge(Object, Object, java.util.function.BiFunction)
null
.default int mergeInt(long key, int value, IntBinaryOperator remappingFunction)
value
.
Otherwise, replaces the associated value with the results of the given remapping function.key
- key with which the resulting value is to be associated.value
- the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.remappingFunction
- the function to recompute a value if present.Map.merge(Object, Object, java.util.function.BiFunction)
null
.
WARNING: Overriding this method is almost always a mistake, as this
overload only exists to disambiguate. Instead, override the overload
that uses the JDK's primitive binary operator (e.g. IntBinaryOperator
).
If Java supported final default methods, this would be one, but sadly it does not.
If you checked and are overriding the version with java.util.function.XBinaryOperator
, and
still see this warning, then your IDE is incorrectly conflating this method with the proper
method to override, and you can safely ignore this message.
@Deprecated default java.lang.Integer putIfAbsent(java.lang.Long key, java.lang.Integer value)
This default implementation just delegates to the corresponding Map
method.
putIfAbsent
in interface java.util.Map<java.lang.Long,java.lang.Integer>
@Deprecated default boolean remove(java.lang.Object key, java.lang.Object value)
This default implementation just delegates to the corresponding Map
method.
remove
in interface java.util.Map<java.lang.Long,java.lang.Integer>
@Deprecated default boolean replace(java.lang.Long key, java.lang.Integer oldValue, java.lang.Integer newValue)
This default implementation just delegates to the corresponding Map
method.
replace
in interface java.util.Map<java.lang.Long,java.lang.Integer>
@Deprecated default java.lang.Integer replace(java.lang.Long key, java.lang.Integer value)
This default implementation just delegates to the corresponding Map
method.
replace
in interface java.util.Map<java.lang.Long,java.lang.Integer>
@Deprecated default java.lang.Integer computeIfAbsent(java.lang.Long key, java.util.function.Function<? super java.lang.Long,? extends java.lang.Integer> mappingFunction)
This default implementation just delegates to the corresponding Map
method.
computeIfAbsent
in interface java.util.Map<java.lang.Long,java.lang.Integer>
@Deprecated default java.lang.Integer computeIfPresent(java.lang.Long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
This default implementation just delegates to the corresponding Map
method.
computeIfPresent
in interface java.util.Map<java.lang.Long,java.lang.Integer>
@Deprecated default java.lang.Integer compute(java.lang.Long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
This default implementation just delegates to the corresponding Map
method.
compute
in interface java.util.Map<java.lang.Long,java.lang.Integer>
@Deprecated default java.lang.Integer merge(java.lang.Long key, java.lang.Integer value, java.util.function.BiFunction<? super java.lang.Integer,? super java.lang.Integer,? extends java.lang.Integer> remappingFunction)
This default implementation just delegates to the corresponding Map
method.
merge
in interface java.util.Map<java.lang.Long,java.lang.Integer>