@FunctionalInterface public interface Byte2CharFunction extends Function<java.lang.Byte,java.lang.Character>, java.util.function.IntUnaryOperator
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.Byte,T> |
andThen(java.util.function.Function<? super java.lang.Character,? extends T> after)
Deprecated.
Please use the corresponding type-specific method instead.
|
default Byte2ByteFunction |
andThenByte(Char2ByteFunction after) |
default Byte2CharFunction |
andThenChar(Char2CharFunction after) |
default Byte2DoubleFunction |
andThenDouble(Char2DoubleFunction after) |
default Byte2FloatFunction |
andThenFloat(Char2FloatFunction after) |
default Byte2IntFunction |
andThenInt(Char2IntFunction after) |
default Byte2LongFunction |
andThenLong(Char2LongFunction after) |
default <T> Byte2ObjectFunction<T> |
andThenObject(Char2ObjectFunction<? extends T> after) |
default <T> Byte2ReferenceFunction<T> |
andThenReference(Char2ReferenceFunction<? extends T> after) |
default Byte2ShortFunction |
andThenShort(Char2ShortFunction after) |
default int |
applyAsInt(int operand)
Deprecated.
Please use primitive types which do not have to be widened as keys.
|
default <T> java.util.function.Function<T,java.lang.Character> |
compose(java.util.function.Function<? super T,? extends java.lang.Byte> before)
Deprecated.
Please use the corresponding type-specific method instead.
|
default Byte2CharFunction |
composeByte(Byte2ByteFunction before) |
default Char2CharFunction |
composeChar(Char2ByteFunction before) |
default Double2CharFunction |
composeDouble(Double2ByteFunction before) |
default Float2CharFunction |
composeFloat(Float2ByteFunction before) |
default Int2CharFunction |
composeInt(Int2ByteFunction before) |
default Long2CharFunction |
composeLong(Long2ByteFunction before) |
default <T> Object2CharFunction<T> |
composeObject(Object2ByteFunction<? super T> before) |
default <T> Reference2CharFunction<T> |
composeReference(Reference2ByteFunction<? super T> before) |
default Short2CharFunction |
composeShort(Short2ByteFunction before) |
default boolean |
containsKey(byte 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 char |
defaultReturnValue()
Gets the default return value.
|
default void |
defaultReturnValue(char rv)
Sets the default return value (optional operation).
|
char |
get(byte key)
Returns the value to which the given key is mapped.
|
default java.lang.Character |
get(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
default char |
getOrDefault(byte key,
char defaultValue)
Returns the value associated by this function to the specified key, or give the specified
value if not present.
|
default java.lang.Character |
getOrDefault(java.lang.Object key,
java.lang.Character defaultValue)
Deprecated.
Please use the corresponding type-specific method instead.
|
default char |
put(byte key,
char value)
Adds a pair to the map (optional operation).
|
default java.lang.Character |
put(java.lang.Byte key,
java.lang.Character value)
Deprecated.
Please use the corresponding type-specific method instead.
|
default char |
remove(byte key)
Removes the mapping with the given key (optional operation).
|
default java.lang.Character |
remove(java.lang.Object key)
Deprecated.
Please use the corresponding type-specific method instead.
|
@Deprecated default int applyAsInt(int operand)
applyAsInt
in interface java.util.function.IntUnaryOperator
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 char put(byte key, char value)
key
- the key.value
- the value.Function.put(Object,Object)
char get(byte key)
key
- the key.Function.get(Object)
default char getOrDefault(byte key, char 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 char remove(byte key)
key
- the key.Function.remove(Object)
@Deprecated default java.lang.Character put(java.lang.Byte key, java.lang.Character 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.Character 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.Character getOrDefault(java.lang.Object key, java.lang.Character 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.Character remove(java.lang.Object key)
key
- the key.null
if no value was present for the given key.Map.remove(Object)
default boolean containsKey(byte 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(char 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 char 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.Character> compose(java.util.function.Function<? super T,? extends java.lang.Byte> before)
compose
in interface java.util.function.Function<java.lang.Byte,java.lang.Character>
@Deprecated default <T> java.util.function.Function<java.lang.Byte,T> andThen(java.util.function.Function<? super java.lang.Character,? extends T> after)
andThen
in interface java.util.function.Function<java.lang.Byte,java.lang.Character>
default Byte2ByteFunction andThenByte(Char2ByteFunction after)
default Byte2CharFunction composeByte(Byte2ByteFunction before)
default Byte2ShortFunction andThenShort(Char2ShortFunction after)
default Short2CharFunction composeShort(Short2ByteFunction before)
default Byte2IntFunction andThenInt(Char2IntFunction after)
default Int2CharFunction composeInt(Int2ByteFunction before)
default Byte2LongFunction andThenLong(Char2LongFunction after)
default Long2CharFunction composeLong(Long2ByteFunction before)
default Byte2CharFunction andThenChar(Char2CharFunction after)
default Char2CharFunction composeChar(Char2ByteFunction before)
default Byte2FloatFunction andThenFloat(Char2FloatFunction after)
default Float2CharFunction composeFloat(Float2ByteFunction before)
default Byte2DoubleFunction andThenDouble(Char2DoubleFunction after)
default Double2CharFunction composeDouble(Double2ByteFunction before)
default <T> Byte2ObjectFunction<T> andThenObject(Char2ObjectFunction<? extends T> after)
default <T> Object2CharFunction<T> composeObject(Object2ByteFunction<? super T> before)
default <T> Byte2ReferenceFunction<T> andThenReference(Char2ReferenceFunction<? extends T> after)
default <T> Reference2CharFunction<T> composeReference(Reference2ByteFunction<? super T> before)