@FunctionalInterface public interface Float2DoubleFunction extends Function<java.lang.Float,java.lang.Double>, java.util.function.DoubleUnaryOperator
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<java.lang.Float,T> |
andThen(java.util.function.Function<? super java.lang.Double,? extends T> after)
Deprecated.
Please use the corresponding type-specific method instead.
|
default Float2ByteFunction |
andThenByte(Double2ByteFunction after) |
default Float2CharFunction |
andThenChar(Double2CharFunction after) |
default Float2DoubleFunction |
andThenDouble(Double2DoubleFunction after) |
default Float2FloatFunction |
andThenFloat(Double2FloatFunction after) |
default Float2IntFunction |
andThenInt(Double2IntFunction after) |
default Float2LongFunction |
andThenLong(Double2LongFunction after) |
default <T> Float2ObjectFunction<T> |
andThenObject(Double2ObjectFunction<? extends T> after) |
default <T> Float2ReferenceFunction<T> |
andThenReference(Double2ReferenceFunction<? extends T> after) |
default Float2ShortFunction |
andThenShort(Double2ShortFunction after) |
default double |
applyAsDouble(double operand)
Deprecated.
Please use primitive types which do not have to be widened as keys.
|
default <T> java.util.function.Function<T,java.lang.Double> |
compose(java.util.function.Function<? super T,? extends java.lang.Float> before)
Deprecated.
Please use the corresponding type-specific method instead.
|
default Byte2DoubleFunction |
composeByte(Byte2FloatFunction before) |
default Char2DoubleFunction |
composeChar(Char2FloatFunction before) |
default Double2DoubleFunction |
composeDouble(Double2FloatFunction before) |
default Float2DoubleFunction |
composeFloat(Float2FloatFunction before) |
default Int2DoubleFunction |
composeInt(Int2FloatFunction before) |
default Long2DoubleFunction |
composeLong(Long2FloatFunction before) |
default <T> Object2DoubleFunction<T> |
composeObject(Object2FloatFunction<? super T> before) |
default <T> Reference2DoubleFunction<T> |
composeReference(Reference2FloatFunction<? super T> before) |
default Short2DoubleFunction |
composeShort(Short2FloatFunction before) |
default boolean |
containsKey(float 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.
|
default double |
defaultReturnValue()
Gets the default return value.
|
default void |
defaultReturnValue(double rv)
Sets the default return value (optional operation).
|
double |
get(float key)
Returns the value to which the given key is mapped.
|
default java.lang.Double |
get(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
default double |
getOrDefault(float key,
double defaultValue)
Returns the value associated by this function to the specified key, or give the specified
value if not present.
|
default java.lang.Double |
getOrDefault(java.lang.Object key,
java.lang.Double defaultValue)
Deprecated.
Please use the corresponding type-specific method instead.
|
default double |
put(float key,
double value)
Adds a pair to the map (optional operation).
|
default java.lang.Double |
put(java.lang.Float key,
java.lang.Double value)
Deprecated.
Please use the corresponding type-specific method instead.
|
default double |
remove(float key)
Removes the mapping with the given key (optional operation).
|
default java.lang.Double |
remove(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
@Deprecated default double applyAsDouble(double operand)
applyAsDouble
in interface java.util.function.DoubleUnaryOperator
java.lang.IllegalArgumentException
- If the given operand is not an element of the key domain.get()
method after narrowing down the key to the
actual key type, throwing an exception if the given key cannot be
represented in the restricted domain. This is done for interoperability
with the Java 8 function environment. The use of this method is discouraged, as
unexpected errors can occur. Instead, the corresponding classes should be
used (e.g., Int2IntFunction
instead of
Short2IntFunction
).default double put(float key, double value)
key
- the key.value
- the value.Function.put(Object,Object)
double get(float key)
key
- the key.Function.get(Object)
default double getOrDefault(float key, double 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 double remove(float key)
key
- the key.Function.remove(Object)
@Deprecated default java.lang.Double put(java.lang.Float key, java.lang.Double 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.Double 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.Double getOrDefault(java.lang.Object key, java.lang.Double 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.Double remove(java.lang.Object key)
key
- the key.null
if no value was present for the given key.Map.remove(Object)
default boolean containsKey(float key)
Note that for some kind of functions (e.g., hashes) this method will always return true. In particular, this default implementation always returns true.
key
- the key.key
.Function.containsKey(Object)
@Deprecated default boolean containsKey(java.lang.Object key)
Note that for some kind of functions (e.g., hashes) this method will always return true. This default implementation, in particular, always return true.
key
- the key.key
.Map.containsKey(Object)
default void defaultReturnValue(double 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 double 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<T,java.lang.Double> compose(java.util.function.Function<? super T,? extends java.lang.Float> before)
compose
in interface java.util.function.Function<java.lang.Float,java.lang.Double>
@Deprecated default <T> java.util.function.Function<java.lang.Float,T> andThen(java.util.function.Function<? super java.lang.Double,? extends T> after)
andThen
in interface java.util.function.Function<java.lang.Float,java.lang.Double>
default Float2ByteFunction andThenByte(Double2ByteFunction after)
default Byte2DoubleFunction composeByte(Byte2FloatFunction before)
default Float2ShortFunction andThenShort(Double2ShortFunction after)
default Short2DoubleFunction composeShort(Short2FloatFunction before)
default Float2IntFunction andThenInt(Double2IntFunction after)
default Int2DoubleFunction composeInt(Int2FloatFunction before)
default Float2LongFunction andThenLong(Double2LongFunction after)
default Long2DoubleFunction composeLong(Long2FloatFunction before)
default Float2CharFunction andThenChar(Double2CharFunction after)
default Char2DoubleFunction composeChar(Char2FloatFunction before)
default Float2FloatFunction andThenFloat(Double2FloatFunction after)
default Float2DoubleFunction composeFloat(Float2FloatFunction before)
default Float2DoubleFunction andThenDouble(Double2DoubleFunction after)
default Double2DoubleFunction composeDouble(Double2FloatFunction before)
default <T> Float2ObjectFunction<T> andThenObject(Double2ObjectFunction<? extends T> after)
default <T> Object2DoubleFunction<T> composeObject(Object2FloatFunction<? super T> before)
default <T> Float2ReferenceFunction<T> andThenReference(Double2ReferenceFunction<? extends T> after)
default <T> Reference2DoubleFunction<T> composeReference(Reference2FloatFunction<? super T> before)