Question

I have this code:

@Column(name = "foo")
@ReadTransformer(transformerClass=transformer.class)
private Date foo;

public static class transformer implements AttributeTransformer {

    @Override
    public void initialize(AbstractTransformationMapping atm) {

}

    @Override
    public Object buildAttributeValue(Record record, Object o, Session sn) {

    }

}

My question is, how do I get the value to transform (from column foo) inside of buildAttributeVaule? It is not inside the record array.

Answer 1

You need one or more @WriteTransformer to write the fields you want selected (and thus get them selected), @Column is not used with a transformation mapping.

However, if you just have a single column, then just use a converter instead, @Convert,

http://wiki.eclipse.org/EclipseLink/UserGuide/JPA/Basic_JPA_Development/Mapping/Basic_Mappings/Default_Conversions_and_Converters