Package org.apache.commons.lang3.function

Interface FailableDoubleUnaryOperator<E extends Throwable>

Type Parameters:

E - The kind of thrown exception or error.

public interface FailableDoubleUnaryOperator<E extends Throwable>

A functional interface like DoubleUnaryOperator that declares a Throwable.

Since:

3.11

Field Summary

Fields

Modifier and Type	Field	Description
static final FailableDoubleUnaryOperator	NOP	NOP singleton

Method Summary

Modifier and Type	Method	Description
default FailableDoubleUnaryOperator<E>	andThen(FailableDoubleUnaryOperator<E> after)	Returns a composed FailableDoubleUnaryOperator like DoubleUnaryOperator.andThen(DoubleUnaryOperator).
double	applyAsDouble(double operand)	Applies this operator to the given operand.
default FailableDoubleUnaryOperator<E>	compose(FailableDoubleUnaryOperator<E> before)	Returns a composed FailableDoubleUnaryOperator like DoubleUnaryOperator.compose(DoubleUnaryOperator).
static <E extends Throwable> FailableDoubleUnaryOperator<E>	identity()	Returns a unary operator that always returns its input argument.
static <E extends Throwable> FailableDoubleUnaryOperator<E>	nop()	Returns The NOP singleton.

Field Details

NOP

static final FailableDoubleUnaryOperator NOP

NOP singleton

Method Details

identity

static <E extends Throwable>
FailableDoubleUnaryOperator<E> identity()

Returns a unary operator that always returns its input argument.

Type Parameters:

E - The kind of thrown exception or error.

Returns:

a unary operator that always returns its input argument

nop

static <E extends Throwable>
FailableDoubleUnaryOperator<E> nop()

Returns The NOP singleton.

Type Parameters:

E - The kind of thrown exception or error.

Returns:

The NOP singleton.

andThen

default FailableDoubleUnaryOperator<E> andThen(FailableDoubleUnaryOperator<E> after)

Returns a composed FailableDoubleUnaryOperator like DoubleUnaryOperator.andThen(DoubleUnaryOperator).

Parameters:

after - the operator to apply after this one.

Returns:

a composed FailableDoubleUnaryOperator like DoubleUnaryOperator.andThen(DoubleUnaryOperator).

Throws:

NullPointerException - if after is null.

See Also:

• compose(FailableDoubleUnaryOperator)

applyAsDouble

double applyAsDouble(double operand)
              throws E

Applies this operator to the given operand.

Parameters:

operand - the operand

Returns:

the operator result

Throws:

E - Thrown when a consumer fails.

compose

default FailableDoubleUnaryOperator<E> compose(FailableDoubleUnaryOperator<E> before)

Returns a composed FailableDoubleUnaryOperator like DoubleUnaryOperator.compose(DoubleUnaryOperator).

Parameters:

before - the operator to apply before this one.

Returns:

a composed FailableDoubleUnaryOperator like DoubleUnaryOperator.compose(DoubleUnaryOperator).

Throws:

NullPointerException - if before is null.

See Also:

• andThen(FailableDoubleUnaryOperator)