Class OneOfN.None

java.lang.Object

de.xima.fc.common.data.algebraic.OneOfN

de.xima.fc.common.data.algebraic.OneOfN.None

All Implemented Interfaces:

Serializable

Enclosing class:

OneOfN

public static final class OneOfN.None
extends OneOfN

Emulates a sum type consisting of 0 cases.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class OneOfN

OneOfN.Either<T1,T2>, OneOfN.EitherMatcher<R,T1,T2>, OneOfN.Just<T1>, OneOfN.JustMatcher<R,T1>, OneOfN.None, OneOfN.NoneMatcher<R>, OneOfN.OneOf3<T1,T2,T3>, OneOfN.OneOf3Matcher<R,T1,T2,T3>, OneOfN.OneOf4<T1,T2,T3,T4>, OneOfN.OneOf4Matcher<R,T1,T2,T3,T4>, OneOfN.OneOf5<T1,T2,T3,T4,T5>, OneOfN.OneOf5Matcher<R,T1,T2,T3,T4,T5>

Field Summary

Fields inherited from class OneOfN

choice, value

Method Summary

Modifier and Type	Method	Description
Void	getValue()	Checks which case applies and returns the value for that case.
static OneOfN.None	instance()
OneOfN.None	map()	Maps this sum type to another sum type by invoking the mapping function for the matching case with the value of this sum type and returning the result.
<R> R	match()	Performs a case match on this sum type by invoking the mapping function for the matching case with the value of this sum type and returning the result.
<R> R	match(R defaultValue, OneOfN.NoneMatcher<? extends R> matcher)	Performs a case match on this sum type by invoking the mapping function for the matching case with the value of this sum type and returning the result.

Methods inherited from class OneOfN

equals, getChoice, getOrThrow, hashCode, is, select, toString

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Details

getValue

public Void getValue()

Description copied from class: OneOfN

Checks which case applies and returns the value for that case. You need to cast it yourself to the required type.

Overrides:

getValue in class OneOfN

Returns:

The value of this sum type.

map

public OneOfN.None map()

Maps this sum type to another sum type by invoking the mapping function for the matching case with the value of this sum type and returning the result.

Returns:

The sum type with the value returned by the mapping function for the matching case.

match

public <R> R match()

Performs a case match on this sum type by invoking the mapping function for the matching case with the value of this sum type and returning the result.

Type Parameters:

R - Type of the result returned by each mapping function.

Returns:

The value returned by the mapping function for the matching case.

match

public <R> R match(R defaultValue,
 OneOfN.NoneMatcher<? extends R> matcher)

Performs a case match on this sum type by invoking the mapping function for the matching case with the value of this sum type and returning the result.

Type Parameters:

R - Type of the result returned by each mapping function.

Parameters:

defaultValue - Value returned when the given matcher has no matching case.

matcher - Matcher object for each case.

Returns:

The value returned by the mapping function for the matching case.

instance

public static OneOfN.None instance()

Returns:

The single instance of this bottom type.