All Superinterfaces:

DoubleFunction<OptionalDouble>

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 OptionalDoubleUnaryOperator
extends DoubleFunction<OptionalDouble>
```
Variation of DoubleUnaryOperator that returns OptionalDouble instead of the raw value. OptionalDoubleUnaryOperator is typically obtained from ExceptionHandler.fromDoubleUnaryOperator(DoubleUnaryOperator), in which case its return value is empty when the underlying DoubleUnaryOperator throws an exception. See noexception tutorial.

See Also:

ExceptionHandler.fromDoubleUnaryOperator(DoubleUnaryOperator), DoubleUnaryOperator

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`OptionalDouble`	`apply(double operand)`	Variation of `DoubleUnaryOperator.applyAsDouble(double)` that returns `OptionalDouble`.
`default DoubleUnaryOperator`	`orElse(double result)`	Converts this `OptionalDoubleUnaryOperator` to plain `DoubleUnaryOperator` using default value.
`default DoubleUnaryOperator`	`orElseGet(DoubleSupplier source)`	Converts this `OptionalDoubleUnaryOperator` to plain `DoubleUnaryOperator` using fallback `DoubleSupplier`.

- Method Detail
  - apply
```
OptionalDouble apply(double operand)
```
    Variation of DoubleUnaryOperator.applyAsDouble(double) that returns OptionalDouble. If this OptionalDoubleUnaryOperator is obtained from ExceptionHandler.fromDoubleUnaryOperator(DoubleUnaryOperator), the OptionalDouble will be empty only if the underlying DoubleUnaryOperator throws. Otherwise the returned OptionalDouble just wraps the return value of underlying DoubleUnaryOperator.
    
    Specified by:
    
    apply in interface DoubleFunction<OptionalDouble>
    
    Parameters:
    
    operand - see DoubleUnaryOperator.applyAsDouble(double)
    
    Returns:
    
    OptionalDouble typically wrapping return value of DoubleUnaryOperator.applyAsDouble(double), or an empty OptionalDouble (typically signifying an exception)
    
    See Also:
    
    ExceptionHandler.fromDoubleUnaryOperator(DoubleUnaryOperator), DoubleUnaryOperator.applyAsDouble(double)
  - orElse
```
default DoubleUnaryOperator orElse(double result)
```
    Converts this OptionalDoubleUnaryOperator to plain DoubleUnaryOperator using default value. The returned DoubleUnaryOperator will unwrap present value from the OptionalDouble if possible, or return result if the OptionalDouble is empty.
    
    Parameters:
    
    result - default value to return instead of an empty OptionalDouble
    
    Returns:
    
    plain DoubleUnaryOperator that either unwraps OptionalDouble or returns default value
    
    See Also:
    
    orElseGet(DoubleSupplier), OptionalDouble.orElse(double)
  - orElseGet
```
default DoubleUnaryOperator orElseGet(DoubleSupplier source)
```
    Converts this OptionalDoubleUnaryOperator to plain DoubleUnaryOperator using fallback DoubleSupplier. The returned DoubleUnaryOperator will unwrap present value from the OptionalDouble if possible, or fall back to calling source if the OptionalDouble is empty.
    
    Parameters:
    
    source - DoubleSupplier to query for fallback value when OptionalDouble is empty
    
    Returns:
    
    plain DoubleUnaryOperator that either unwraps OptionalDouble or falls back to source
    
    See Also:
    
    orElse(double), OptionalDouble.orElseGet(DoubleSupplier)

Interface OptionalDoubleUnaryOperator

Method Summary

Method Detail

apply

orElse

orElseGet