Package io.deephaven.function

Interface ToObjectFunction<T,R>

Type Parameters:

T - the input type

R - the return type

All Superinterfaces:

Function<T,R>, TypedFunction<T>

public interface ToObjectFunction<T,R>
extends TypedFunction<T>, Function<T,R>

An object function.

Note: this is not a FunctionalInterface, as returnType() must be provided.

Nested Class Summary

Nested classes/interfaces inherited from interface io.deephaven.function.TypedFunction

TypedFunction.Visitor<T,R>

Method Summary

Modifier and Type	Method	Description
R	apply(T value)
default <T2 extends T, R2> ToObjectFunction<T2,R2>	cast(GenericType<R2> returnType)	Creates a function by casting to returnType.
static <T> ToObjectFunction<T,Object>	identity()	Creates an object function that casts each input to Object.
static <T, R extends T> ToObjectFunction<T,R>	identity(GenericType<R> returnType)	Creates an object function that casts each input to returnType.
default <T2 extends T> TypedFunction<T2>	map(TypedFunction<? super R> g)	Creates the function composition g ∘ this.
static <T, R, Z> ToObjectFunction<T,Z>	map(Function<? super T,? extends R> f, ToObjectFunction<? super R,Z> g)	Creates the function composition g ∘ f.
static <T, R, Z> ToObjectFunction<T,Z>	map(Function<? super T,? extends R> f, Function<? super R,? extends Z> g, GenericType<Z> returnType)	Creates the function composition g ∘ f.
default <T2 extends T> ToBooleanFunction<T2>	mapToBoolean(Predicate<? super R> g)	Creates the function composition g ∘ this.
default <T2 extends T> ToByteFunction<T2>	mapToByte(ToByteFunction<? super R> g)	Creates the function composition g ∘ this.
default <T2 extends T> ToCharFunction<T2>	mapToChar(ToCharFunction<? super R> g)	Creates the function composition g ∘ this.
default <T2 extends T> ToDoubleFunction<T2>	mapToDouble(ToDoubleFunction<? super R> g)	Creates the function composition g ∘ this.
default <T2 extends T> ToFloatFunction<T2>	mapToFloat(ToFloatFunction<? super R> g)	Creates the function composition g ∘ this.
default <T2 extends T> ToIntFunction<T2>	mapToInt(ToIntFunction<? super R> g)	Creates the function composition g ∘ this.
default <T2 extends T> ToLongFunction<T2>	mapToLong(ToLongFunction<? super R> g)	Creates the function composition g ∘ this.
default <T2 extends T, R2> ToObjectFunction<T2,R2>	mapToObj(ToObjectFunction<? super R,R2> g)	Creates the function composition g ∘ this.
default <T2 extends T, R2> ToObjectFunction<T2,R2>	mapToObj(Function<? super R,? extends R2> g, GenericType<R2> returnType)	Creates the function composition g ∘ this.
default <T2 extends T> ToPrimitiveFunction<T2>	mapToPrimitive(ToPrimitiveFunction<? super R> g)	Creates the function composition g ∘ this.
default <T2 extends T> ToShortFunction<T2>	mapToShort(ToShortFunction<? super R> g)	Creates the function composition g ∘ this.
static <T, R> ToObjectFunction<T,R>	of(Function<? super T,? extends R> f, GenericType<R> returnType)	Creates an object function from f and returnType.
GenericType<R>	returnType()	This function's return type.
default <Z> Z	walk(TypedFunction.Visitor<T,Z> visitor)

Methods inherited from interface java.util.function.Function

andThen, compose

Method Details

of

static <T,
R> ToObjectFunction<T,R> of(Function<? super T,? extends R> f,
 GenericType<R> returnType)

Creates an object function from f and returnType.

Type Parameters:

T - the input type

R - the return type

Parameters:

f - the function

returnType - the return type

Returns:

the object function

identity

static <T> ToObjectFunction<T,Object> identity()

Creates an object function that casts each input to Object. Equivalent to x -> (Object)x.

Type Parameters:

T - the input type

Returns:

the object function

identity

static <T,
R extends T> ToObjectFunction<T,R> identity(GenericType<R> returnType)

Creates an object function that casts each input to returnType. Equivalent to x -> (R)x.

Type Parameters:

T - the input type

R - the return type

Parameters:

returnType - the return type

Returns:

the object function

map

static <T,
R,
Z> ToObjectFunction<T,Z> map(Function<? super T,? extends R> f,
 ToObjectFunction<? super R,Z> g)

Creates the function composition g ∘ f.

Equivalent to x -> g.apply(f.apply(x)).

Type Parameters:

T - the input type

R - the intermediate type

Z - the return type

Parameters:

f - the inner function

g - the outer function

Returns:

the object function

map

static <T,
R,
Z> ToObjectFunction<T,Z> map(Function<? super T,? extends R> f,
 Function<? super R,? extends Z> g,
 GenericType<Z> returnType)

Creates the function composition g ∘ f.

Equivalent to x -> g.apply(f.apply(x)).

Type Parameters:

T - the input type

R - the intermediate type

Z - the return type

Parameters:

f - the inner function

g - the outer function

returnType - the return type

Returns:

the object function

returnType

GenericType<R> returnType()

Description copied from interface: TypedFunction

This function's return type.

Specified by:

returnType in interface TypedFunction<T>

Returns:

the type

apply

R apply(T value)

Specified by:

apply in interface Function<T,R>

mapToBoolean

default <T2 extends T> ToBooleanFunction<T2> mapToBoolean(Predicate<? super R> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.test(this.apply(x)).

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the boolean function

mapToChar

default <T2 extends T> ToCharFunction<T2> mapToChar(ToCharFunction<? super R> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.applyAsChar(this.apply(x)).

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the char function

mapToByte

default <T2 extends T> ToByteFunction<T2> mapToByte(ToByteFunction<? super R> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.applyAsByte(this.apply(x)).

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the byte function

mapToShort

default <T2 extends T> ToShortFunction<T2> mapToShort(ToShortFunction<? super R> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.applyAsShort(this.apply(x)).

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the short function

mapToInt

default <T2 extends T> ToIntFunction<T2> mapToInt(ToIntFunction<? super R> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.applyAsInt(this.apply(x)).

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the int function

mapToLong

default <T2 extends T> ToLongFunction<T2> mapToLong(ToLongFunction<? super R> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.applyAsLong(this.apply(x)).

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the long function

mapToFloat

default <T2 extends T> ToFloatFunction<T2> mapToFloat(ToFloatFunction<? super R> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.applyAsFloat(this.apply(x)).

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the float function

mapToDouble

default <T2 extends T> ToDoubleFunction<T2> mapToDouble(ToDoubleFunction<? super R> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.applyAsDouble(this.apply(x)).

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the double function

mapToObj

default <T2 extends T,
R2> ToObjectFunction<T2,R2> mapToObj(ToObjectFunction<? super R,R2> g)

Creates the function composition g ∘ this.

Equivalent to x -> g.apply(this.apply(x)).

Type Parameters:

T2 - the returned function input type

R2 - the returned function return type

Parameters:

g - the outer function

Returns:

the object function

mapToObj

default <T2 extends T,
R2> ToObjectFunction<T2,R2> mapToObj(Function<? super R,? extends R2> g,
 GenericType<R2> returnType)

Creates the function composition g ∘ this.

Equivalent to x -> g.apply(this.apply(x)).

Type Parameters:

T2 - the returned function input type

R2 - the returned function return type

Parameters:

g - the outer function

Returns:

the object function

mapToPrimitive

default <T2 extends T> ToPrimitiveFunction<T2> mapToPrimitive(ToPrimitiveFunction<? super R> g)

Creates the function composition g ∘ this.

Prefer to call one of the more strongly-typed map methods if you have a more specific function type.

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the function

See Also:

• mapToBoolean(Predicate)
• mapToChar(ToCharFunction)
• mapToByte(ToByteFunction)
• mapToShort(ToShortFunction)
• mapToInt(java.util.function.ToIntFunction)
• mapToLong(java.util.function.ToLongFunction)
• mapToFloat(ToFloatFunction)
• mapToDouble(java.util.function.ToDoubleFunction)

map

default <T2 extends T> TypedFunction<T2> map(TypedFunction<? super R> g)

Creates the function composition g ∘ this.

Prefer to call one of the more strongly-typed map methods if you have a more specific function type.

Type Parameters:

T2 - the returned function input type

Parameters:

g - the outer function

Returns:

the function

See Also:

• mapToPrimitive(ToPrimitiveFunction)
• mapToObj(ToObjectFunction)

cast

default <T2 extends T,
R2> ToObjectFunction<T2,R2> cast(GenericType<R2> returnType)

Creates a function by casting to returnType.

In the case where returnType().equals(returnType), the result is (ObjectFunction<T2, R2>) this. Otherwise, the result is equivalent to x -> (R2) this.apply(x).

Type Parameters:

T2 - the returned function input type

R2 - the returned function return type

Parameters:

returnType - the return type

Returns:

the object function

walk

default <Z> Z walk(TypedFunction.Visitor<T,Z> visitor)

Specified by:

walk in interface TypedFunction<T>