no.digipost.jdbc

Interface BasicColumnMapper<R>

Type Parameters:

R - The type of the result.

All Superinterfaces:

ColumnMapper<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 BasicColumnMapper<R>
extends ColumnMapper<R>

The basic ColumnMapper retrieves a value from a ResultSet, and offers a way to compose a chain of functions that maps the value. As the value retrieved from the ResultSet is unconditionally passed down the chain of mapping functions, if retrieving a value from a nullable column, consider using a NullableColumnMapper instead.

See Also:

NullableColumnMapper

Method Summary

Modifier and Type	Method and Description
default <S> BasicColumnMapper<S>	andThen(Function<? super R,S> mapper) Create a new BasicColumnMapper which will map the result of this one using the given function.
default BasicColumnMapper<R>	nullFallthrough() Specify that a retrieved null value will short circuit any chain from this point.
static <R> BasicColumnMapper<R>	of(ThrowingBiFunction<String,ResultSet,R,? extends SQLException> function)

Methods inherited from interface no.digipost.jdbc.ColumnMapper

forColumn, map

Method Detail

of

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

andThen

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

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

Type Parameters:

S - The type of object the new ColumnMapper yields from a ResultSet

Parameters:

mapper - the mapping function

Returns:

the new mapper

See Also:

nullFallthrough()

nullFallthrough

default BasicColumnMapper<R> nullFallthrough()

Specify that a retrieved null value will short circuit any chain from this point. A mapping chain can be constructed with andThen(Function), and if a value retrieved from a ResultSet is nullable, usually this should pass unchanged through a chain of mappers as null. This eliminates the need for the mapping functions to handle nulls.

This should be used for rare circumstances where the result from a function passed to andThen(Function) can be null. If mapping a nullable database column, consider using a NullableColumnMapper instead.

Returns:

a new ColumnMapper

See Also:

NullableColumnMapper