DoubleUnaryIOOperator (io-functions 2.0 API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface DoubleUnaryIOOperator
```
Represents an operation on a single double-valued operand that produces a double-valued result. This is the IOException throwing equivalent of DoubleUnaryOperator.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`default DoubleUnaryIOOperator`	`andThen(DoubleUnaryIOOperator after)` Returns a composed operator that first applies this operator to its input, and then applies the `after` operator to the result.
`double`	`applyAsDouble(double operand)` Applies this operator to the given operand.
`static DoubleUnaryIOOperator`	`checked(DoubleUnaryOperator operator)` Returns a unary operator that applies the `operator` operator to its input, and unwraps any `UncheckedIOException` that is thrown by throwing its `cause`.
`default DoubleUnaryIOOperator`	`compose(DoubleUnaryIOOperator before)` Returns a composed operator that first applies the `before` operator to its input, and then applies this operator to the result.
`static DoubleUnaryIOOperator`	`identity()` Returns a unary operator that always returns its input argument.
`static DoubleUnaryOperator`	`unchecked(DoubleUnaryIOOperator operator)` Returns a unary operator that applies the `operator` operator to its input, and wraps any `IOException` that is thrown in an `UncheckedIOException`.

- Method Detail
  - applyAsDouble
```
double applyAsDouble(double operand)
              throws IOException
```
    Applies this operator to the given operand.
    
    Parameters:
    
    operand - The operand.
    
    Returns:
    
    The operator result.
    
    Throws:
    
    IOException - If an I/O error occurs.
  - compose
```
default DoubleUnaryIOOperator compose(DoubleUnaryIOOperator before)
```
    Returns a composed operator that first applies the before operator to its input, and then applies this operator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.
    
    Parameters:
    
    before - The operator to apply before this operator is applied.
    
    Returns:
    
    A composed operator that first applies the before operator and then applies this operator.
    
    Throws:
    
    NullPointerException - If before is null.
    
    See Also:
    
    andThen(DoubleUnaryIOOperator)
  - andThen
```
default DoubleUnaryIOOperator andThen(DoubleUnaryIOOperator after)
```
    Returns a composed operator that first applies this operator to its input, and then applies the after operator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.
    
    Parameters:
    
    after - The operator to apply after this operator is applied.
    
    Returns:
    
    A composed operator that first applies this operator and then applies the after operator.
    
    Throws:
    
    NullPointerException - If after is null.
    
    See Also:
    
    compose(DoubleUnaryIOOperator)
  - identity
```
static DoubleUnaryIOOperator identity()
```
    Returns a unary operator that always returns its input argument.
    
    Returns:
    
    A unary operator that always returns its input argument.
  - unchecked
```
static DoubleUnaryOperator unchecked(DoubleUnaryIOOperator operator)
```
    Returns a unary operator that applies the operator operator to its input, and wraps any IOException that is thrown in an UncheckedIOException.
    
    Parameters:
    
    operator - The unary operator to apply when the returned unary operator is applied.
    
    Returns:
    
    A unary operator that applies the operator operator to its input, and wraps any IOException that is thrown in an UncheckedIOException.
    
    Throws:
    
    NullPointerException - If operator is null.
  - checked
```
static DoubleUnaryIOOperator checked(DoubleUnaryOperator operator)
```
    Returns a unary operator that applies the operator operator to its input, and unwraps any UncheckedIOException that is thrown by throwing its cause.
    
    Parameters:
    
    operator - The unary operator to apply when the returned unary operator is applied.
    
    Returns:
    
    A unary operator that applies the operator operator to its input, and unwraps any UncheckedIOException that is thrown.
    
    Throws:
    
    NullPointerException - If operator is null.

Interface DoubleUnaryIOOperator

Method Summary

Method Detail

applyAsDouble

compose

andThen

identity

unchecked

checked