jivago.lang.nullable module
- class jivago.lang.nullable.Nullable(nullable: T | None)[source]
Bases:
Generic
[T
]Nullable class which wraps Optional types.
- Parameters:
nullable (Optional) – Item which can be None.
- filter(predicate: Callable[[T], bool] | Callable[[...], bool]) Nullable[T] [source]
Filters item given a criterion.
- Parameters:
predicate (Callable) – Invoked with a non-nil parameter. Should return a boolean.
- get() T [source]
Gets the item if present.
- Raises:
EmptyNullableException – Attempting to get a missing item.
- ifPresent(consumer: Callable[[T], None] | Callable[[...], None]) Nullable[T] [source]
Invoke function if value is present; otherwise does nothing.
- Parameters:
consumer (Callable) – Function to be invoked with a non-nil parameter.
- map(callable: Callable[[T], S] | Callable[[...], S]) Nullable[S] [source]
Maps the item when present.
- Parameters:
callable (Callable) – Invoked with a non-nil parameter.
- orElse(default_value: T) T [source]
Returns the item if present, else return the supplied default value.
- Parameters:
default_value – Value to return instead of a None value.