io.micronaut.data.jdbc.annotation

Annotation Type ColumnTransformer

@Target(value={FIELD,METHOD})
 @Retention(value=RUNTIME)
public @interface ColumnTransformer

Inspired by Hibernate's annotation of the same name. This annotation allows for a custom SQL expression when reading and writing a property.

The write expression must contain exactly one '?' placeholder for the value.

For example: read="decrypt(payment_.credit_card_num)" write="encrypt(?)"

Since:

1.0

Author:

graemerocher

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
java.lang.String	read A SQL expression used to the read the column.
java.lang.String	write A SQL expression used to write the column.

Element Detail

read

@AliasFor(annotation=DataTransformer.class,
          member="read")
public abstract java.lang.String read

A SQL expression used to the read the column. Note that to reference a column you must use the appropriate alias prefix, which is the table name followed by an underscore. For example for an entity called Project the alias would be project_.

Returns:

A SQL expression used to read the column.

Default:

""

write

@AliasFor(annotation=DataTransformer.class,
          member="write")
public abstract java.lang.String write

A SQL expression used to write the column. Must have exactly one '?' placeholder.

Returns:

The expression

Default:

""