Package org.dmfs.jems2.optional

Class Summary

Class	Description
Absent<T>	An Optional value that's never present.
Collapsed<T>	Collapses the given Optional of Optional into Optional.
Conditional<T>	Optional that is present with the value of the provided target if it satisfies the given Predicate, otherwise it is absent.
DelegatingOptional<T>	An abstract Optional which delegates all method calls to another given Optional.
First<T>	The first value of an Iterable.
FirstPresent<T>	The first present value of an Iterable of Optionals.
Frozen<T>	An Optional decorator which avoids frequent (potentially expensive) evaluation of another Optional by retaining the result of the first evaluation.
Just<T>	A present Optional that takes a Single for the value.
LazyDelegatingOptional<T>	An abstract Optional which delegates all method calls to another given Optional.
MapCollapsed<From,To>	Optional decorator maps the given Optional to an Optional and collapses the result.
MapEntry<V>	An Optional element of a Map.
Mapped<From,To>	Optional that maps an Optional if it's present using the given Function.
Next<E>	The next value of an Iterator.
NextPresent<T>	The next present value in the given Iterator of Optionals.
NullSafe<T>	An Optional that's not present if the given value is null.
Present<T>	A special Optional that's always present.
Restrained<T>	Optional decorator restrains the presence of another Optional with a specific (independent) condition.
Sieved<T>	Optional decorator which is present if the delegate is present and satisfies a specific Predicate.
Zipped<Left,Right,Result>	An Optional which combines two other Optionals with a BiFunction if they are both present and is absent otherwise.