Type Parameters:

T - see ToIntFunction

All Superinterfaces:

Function<T,OptionalInt>

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 OptionalToIntFunction<T>
extends Function<T,OptionalInt>
```
Variation of ToIntFunction that returns OptionalInt instead of the raw value. OptionalToIntFunction is typically obtained from ExceptionHandler.fromToIntFunction(ToIntFunction), in which case its return value is empty when the underlying ToIntFunction throws an exception. See noexception tutorial.

See Also:

ExceptionHandler.fromToIntFunction(ToIntFunction), ToIntFunction

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`OptionalInt`	`apply(T value)`	Variation of `ToIntFunction.applyAsInt(Object)` that returns `OptionalInt`.
`default ToIntFunction<T>`	`orElse(int result)`	Converts this `OptionalToIntFunction` to plain `ToIntFunction` using default value.
`default ToIntFunction<T>`	`orElseGet(IntSupplier source)`	Converts this `OptionalToIntFunction` to plain `ToIntFunction` using fallback `IntSupplier`.

Methods inherited from interface java.util.function.Function
andThen, compose

- Method Detail
  - apply
```
OptionalInt apply(T value)
```
    Variation of ToIntFunction.applyAsInt(Object) that returns OptionalInt. If this OptionalToIntFunction is obtained from ExceptionHandler.fromToIntFunction(ToIntFunction), the OptionalInt will be empty only if the underlying ToIntFunction throws. Otherwise the returned OptionalInt just wraps the return value of underlying ToIntFunction.
    
    Specified by:
    
    apply in interface Function<T,OptionalInt>
    
    Parameters:
    
    value - see ToIntFunction.applyAsInt(Object)
    
    Returns:
    
    OptionalInt typically wrapping return value of ToIntFunction.applyAsInt(Object), or an empty OptionalInt (typically signifying an exception)
    
    See Also:
    
    ExceptionHandler.fromToIntFunction(ToIntFunction), ToIntFunction.applyAsInt(Object)
  - orElse
```
default ToIntFunction<T> orElse(int result)
```
    Converts this OptionalToIntFunction to plain ToIntFunction using default value. The returned ToIntFunction will unwrap present value from the OptionalInt if possible, or return result if the OptionalInt is empty.
    
    Parameters:
    
    result - default value to return instead of an empty OptionalInt
    
    Returns:
    
    plain ToIntFunction that either unwraps OptionalInt or returns default value
    
    See Also:
    
    orElseGet(IntSupplier), OptionalInt.orElse(int)
  - orElseGet
```
default ToIntFunction<T> orElseGet(IntSupplier source)
```
    Converts this OptionalToIntFunction to plain ToIntFunction using fallback IntSupplier. The returned ToIntFunction will unwrap present value from the OptionalInt if possible, or fall back to calling source if the OptionalInt is empty.
    
    Parameters:
    
    source - IntSupplier to query for fallback value when OptionalInt is empty
    
    Returns:
    
    plain ToIntFunction that either unwraps OptionalInt or falls back to source
    
    See Also:
    
    orElse(int), OptionalInt.orElseGet(IntSupplier)

Interface OptionalToIntFunction<T>

Method Summary

Methods inherited from interface java.util.function.Function

Method Detail

apply

orElse

orElseGet