Package no.digipost.jdbc

Interface NullableColumnMapper<R>

Type Parameters:

R - The type of the Optional result.

All Superinterfaces:

ColumnMapper<Optional<R>>

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 NullableColumnMapper<R>
extends ColumnMapper<Optional<R>>

A ColumnMapper which is apropriate for retrieving nullable columns from a ResultSet. If the result from a mapping (or any Function in the mapping chain) is null, the result is always Optional.empty(), and the chain of any remaining mapping functions are "short-circuited" and not invoked.

Method Summary

Modifier and Type	Method	Description
default <S> NullableColumnMapper<S>	andThen(Function<? super R,S> mapper)	Create a new NullableColumnMapper which will map the result of this one using the given function.
static <R> NullableColumnMapper<R>	of(ThrowingBiFunction<String,ResultSet,R,? extends SQLException> function)

Methods inherited from interface no.digipost.jdbc.ColumnMapper

forColumn, map

Method Details

of

static <R> NullableColumnMapper<R> of(ThrowingBiFunction<String,ResultSet,R,? extends SQLException> function)

andThen

default <S> NullableColumnMapper<S> andThen(Function<? super R,S> mapper)

Create a new NullableColumnMapper which will map the result of this one using the given function.

Type Parameters:

S - The type of Optional<S> the new mapper yields from a ResultSet

Parameters:

mapper - the mapping function. This will not be called if the result of the mapping chain is already Optional.empty().

Returns:

the new mapper