All Superinterfaces:

LongFunction<OptionalLong>

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 OptionalLongUnaryOperator
extends LongFunction<OptionalLong>
```
Variation of LongUnaryOperator that returns OptionalLong instead of the raw value. OptionalLongUnaryOperator is typically obtained from ExceptionHandler.fromLongUnaryOperator(LongUnaryOperator), in which case its return value is empty when the underlying LongUnaryOperator throws an exception. See noexception tutorial.

See Also:

ExceptionHandler.fromLongUnaryOperator(LongUnaryOperator), LongUnaryOperator

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`OptionalLong`	`apply(long operand)`	Variation of `LongUnaryOperator.applyAsLong(long)` that returns `OptionalLong`.
`default LongUnaryOperator`	`orElse(long result)`	Converts this `OptionalLongUnaryOperator` to plain `LongUnaryOperator` using default value.
`default LongUnaryOperator`	`orElseGet(LongSupplier source)`	Converts this `OptionalLongUnaryOperator` to plain `LongUnaryOperator` using fallback `LongSupplier`.

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

Interface OptionalLongUnaryOperator

Method Summary

Method Detail

apply

orElse

orElseGet