io.spine.server.entity.storage

Interface ColumnMapping<R>

Type Parameters:

R - a supertype of all stored values

All Known Implementing Classes:

AbstractColumnMapping, DefaultColumnMapping

@SPI
public interface ColumnMapping<R>

The value mapping rules of entity columns.

A ColumnTypeMapping allows to map column values of certain type to their value in the storage.

Since there is a limited set of possible column types, in most non-testing scenarios it will be more convenient to extend AbstractColumnMapping than to implement this interface directly.

Method Summary

Modifier and Type	Method and Description
<T> ColumnTypeMapping<T,? extends R>	of(java.lang.Class<T> type) Obtains the mapping rules for the given type.
ColumnTypeMapping<?,? extends R>	ofNull() Obtains the mapping rules of null.

Method Detail

of

<T> ColumnTypeMapping<T,? extends R> of(java.lang.Class<T> type)

Obtains the mapping rules for the given type.

Type Parameters:

T - the column type

Throws:

java.lang.IllegalArgumentException - if the mapping for the specified type cannot be found

ofNull

ColumnTypeMapping<?,? extends R> ofNull()

Obtains the mapping rules of null.