@FunctionalInterface public interface Object2FloatFunction<K> extends Function<K,java.lang.Float>, java.util.function.ToDoubleFunction<K>
Function
; provides some additional methods that use polymorphism to avoid (un)boxing.
Type-specific versions of get()
, put()
and
remove()
cannot rely on null
to denote absence of
a key. Rather, they return a default
return value, which is set to 0/false at creation, but can be changed using
the defaultReturnValue()
method.
For uniformity reasons, even functions returning objects implement the default
return value (of course, in this case the default return value is
initialized to null
).
The default implementation of optional operations just throw an UnsupportedOperationException
, except for the type-specific containsKey()
, which return true. Generic versions of accessors delegate to
the corresponding type-specific counterparts following the interface rules.
Warning: to fall in line as much as possible with the
standard map interface, it is required that
standard versions of get()
, put()
and
remove()
for maps with primitive-type keys or values return
null
to denote missing keys rather than wrap the default
return value in an object. In case both keys and values are reference
types, the default return value must be returned instead, thus violating
the standard map interface when the default
return value is not null
.
Function
Modifier and Type | Method and Description |
---|---|
default <T> java.util.function.Function<K,T> |
andThen(java.util.function.Function<? super java.lang.Float,? extends T> after)
Deprecated.
Please use the corresponding type-specific method instead.
|
default Object2ByteFunction<K> |
andThenByte(Float2ByteFunction after) |
default Object2CharFunction<K> |
andThenChar(Float2CharFunction after) |
default Object2DoubleFunction<K> |
andThenDouble(Float2DoubleFunction after) |
default Object2FloatFunction<K> |
andThenFloat(Float2FloatFunction after) |
default Object2IntFunction<K> |
andThenInt(Float2IntFunction after) |
default Object2LongFunction<K> |
andThenLong(Float2LongFunction after) |
default <T> Object2ObjectFunction<K,T> |
andThenObject(Float2ObjectFunction<? extends T> after) |
default <T> Object2ReferenceFunction<K,T> |
andThenReference(Float2ReferenceFunction<? extends T> after) |
default Object2ShortFunction<K> |
andThenShort(Float2ShortFunction after) |
default double |
applyAsDouble(K operand) |
default Byte2FloatFunction |
composeByte(Byte2ObjectFunction<K> before) |
default Char2FloatFunction |
composeChar(Char2ObjectFunction<K> before) |
default Double2FloatFunction |
composeDouble(Double2ObjectFunction<K> before) |
default Float2FloatFunction |
composeFloat(Float2ObjectFunction<K> before) |
default Int2FloatFunction |
composeInt(Int2ObjectFunction<K> before) |
default Long2FloatFunction |
composeLong(Long2ObjectFunction<K> before) |
default <T> Object2FloatFunction<T> |
composeObject(Object2ObjectFunction<? super T,? extends K> before) |
default <T> Reference2FloatFunction<T> |
composeReference(Reference2ObjectFunction<? super T,? extends K> before) |
default Short2FloatFunction |
composeShort(Short2ObjectFunction<K> before) |
default float |
defaultReturnValue()
Gets the default return value.
|
default void |
defaultReturnValue(float rv)
Sets the default return value (optional operation).
|
default java.lang.Float |
get(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
float |
getFloat(java.lang.Object key)
Returns the value to which the given key is mapped.
|
default float |
getOrDefault(java.lang.Object key,
float defaultValue)
Returns the value associated by this function to the specified key, or give the specified
value if not present.
|
default java.lang.Float |
getOrDefault(java.lang.Object key,
java.lang.Float defaultValue)
Deprecated.
Please use the corresponding type-specific method instead.
|
default float |
put(K key,
float value)
Adds a pair to the map (optional operation).
|
default java.lang.Float |
put(K key,
java.lang.Float value)
Deprecated.
Please use the corresponding type-specific method instead.
|
default java.lang.Float |
remove(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
default float |
removeFloat(java.lang.Object key)
Removes the mapping with the given key (optional operation).
|
apply, clear, containsKey, size
default double applyAsDouble(K operand)
applyAsDouble
in interface java.util.function.ToDoubleFunction<K>
default float put(K key, float value)
key
- the key.value
- the value.Function.put(Object,Object)
float getFloat(java.lang.Object key)
key
- the key.Function.get(Object)
default float getOrDefault(java.lang.Object key, float defaultValue)
key
- the key.defaultValue
- the value to return if not present.defaultValue
if no value was present for the given key.Function.getOrDefault(Object, Object)
default float removeFloat(java.lang.Object key)
key
- the key.Function.remove(Object)
@Deprecated default java.lang.Float put(K key, java.lang.Float value)
key
- the key.value
- the value.null
if no value was present for the given key.Map.put(Object,Object)
@Deprecated default java.lang.Float get(java.lang.Object key)
key
- the key.null
if no value was present for the given key.Map.get(Object)
@Deprecated default java.lang.Float getOrDefault(java.lang.Object key, java.lang.Float defaultValue)
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)
@Deprecated default java.lang.Float remove(java.lang.Object key)
key
- the key.null
if no value was present for the given key.Map.remove(Object)
default void defaultReturnValue(float rv)
get()
, put()
and remove()
to
denote that the map does not contain the specified key. It must be
0/false
/null
by default.rv
- the new default return value.defaultReturnValue()
default float defaultReturnValue()
This default implementation just return the default null value
of the type (null
for objects, 0 for scalars, false for Booleans).
@Deprecated default <T> java.util.function.Function<K,T> andThen(java.util.function.Function<? super java.lang.Float,? extends T> after)
andThen
in interface java.util.function.Function<K,java.lang.Float>
default Object2ByteFunction<K> andThenByte(Float2ByteFunction after)
default Byte2FloatFunction composeByte(Byte2ObjectFunction<K> before)
default Object2ShortFunction<K> andThenShort(Float2ShortFunction after)
default Short2FloatFunction composeShort(Short2ObjectFunction<K> before)
default Object2IntFunction<K> andThenInt(Float2IntFunction after)
default Int2FloatFunction composeInt(Int2ObjectFunction<K> before)
default Object2LongFunction<K> andThenLong(Float2LongFunction after)
default Long2FloatFunction composeLong(Long2ObjectFunction<K> before)
default Object2CharFunction<K> andThenChar(Float2CharFunction after)
default Char2FloatFunction composeChar(Char2ObjectFunction<K> before)
default Object2FloatFunction<K> andThenFloat(Float2FloatFunction after)
default Float2FloatFunction composeFloat(Float2ObjectFunction<K> before)
default Object2DoubleFunction<K> andThenDouble(Float2DoubleFunction after)
default Double2FloatFunction composeDouble(Double2ObjectFunction<K> before)
default <T> Object2ObjectFunction<K,T> andThenObject(Float2ObjectFunction<? extends T> after)
default <T> Object2FloatFunction<T> composeObject(Object2ObjectFunction<? super T,? extends K> before)
default <T> Object2ReferenceFunction<K,T> andThenReference(Float2ReferenceFunction<? extends T> after)
default <T> Reference2FloatFunction<T> composeReference(Reference2ObjectFunction<? super T,? extends K> before)