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 OptionalDoublePredicate
```
Variation of DoublePredicate that returns OptionalBoolean instead of the raw value. OptionalDoublePredicate is typically obtained from ExceptionHandler.fromDoublePredicate(DoublePredicate), in which case its return value is empty when the underlying DoublePredicate throws an exception. See noexception tutorial.

See Also:

ExceptionHandler.fromDoublePredicate(DoublePredicate), DoublePredicate

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default DoublePredicate`	`orElse(boolean result)`	Converts this `OptionalDoublePredicate` to plain `DoublePredicate` using default value.
`default DoublePredicate`	`orElseGet(BooleanSupplier source)`	Converts this `OptionalDoublePredicate` to plain `DoublePredicate` using fallback `BooleanSupplier`.
`OptionalBoolean`	`test(double value)`	Variation of `DoublePredicate.test(double)` that returns `OptionalBoolean`.

- Method Detail
  - test
```
OptionalBoolean test(double value)
```
    Variation of DoublePredicate.test(double) that returns OptionalBoolean. If this OptionalDoublePredicate is obtained from ExceptionHandler.fromDoublePredicate(DoublePredicate), the OptionalBoolean will be empty only if the underlying DoublePredicate throws. Otherwise the returned OptionalBoolean just wraps the return value of underlying DoublePredicate.
    
    Parameters:
    
    value - see DoublePredicate.test(double)
    
    Returns:
    
    OptionalBoolean typically wrapping return value of DoublePredicate.test(double), or an empty OptionalBoolean (typically signifying an exception)
    
    See Also:
    
    ExceptionHandler.fromDoublePredicate(DoublePredicate), DoublePredicate.test(double)
  - orElse
```
default DoublePredicate orElse(boolean result)
```
    Converts this OptionalDoublePredicate to plain DoublePredicate using default value. The returned DoublePredicate will unwrap present value from the OptionalBoolean if possible, or return result if the OptionalBoolean is empty.
    
    Parameters:
    
    result - default value to return instead of an empty OptionalBoolean
    
    Returns:
    
    plain DoublePredicate that either unwraps OptionalBoolean or returns default value
    
    See Also:
    
    orElseGet(BooleanSupplier), OptionalBoolean.orElse(boolean)
  - orElseGet
```
default DoublePredicate orElseGet(BooleanSupplier source)
```
    Converts this OptionalDoublePredicate to plain DoublePredicate using fallback BooleanSupplier. The returned DoublePredicate will unwrap present value from the OptionalBoolean if possible, or fall back to calling source if the OptionalBoolean is empty.
    
    Parameters:
    
    source - BooleanSupplier to query for fallback value when OptionalBoolean is empty
    
    Returns:
    
    plain DoublePredicate that either unwraps OptionalBoolean or falls back to source
    
    See Also:
    
    orElse(boolean), OptionalBoolean.orElseGet(BooleanSupplier)

Interface OptionalDoublePredicate

Method Summary

Method Detail

test

orElse

orElseGet