Description Patrick Lee 2015-12-17 15:36:21 EST

I have an entity with an @Convert annotation on a field and the conversion is getting run and it persists to the database properly.  When retrieving that newly persisted value the Pojo coming back does not have the converted value.  If I clear the cache before retrieving the value is correct.  Is this some kind of caching configuration issue on my end or a bug with @Converter and caching ? 

Here is some pseudo code:

@Converter
public class EmptyStringToNull implements AttributeConverter <String, String> {
    @Override
    public String convertToDatabaseColumn(String v) {
        return Strings.emptyToNull(v);
    }

    @Override
    public String convertToEntityAttribute(String v) {
        return Strings.emptyToNull(v);
    }
}

@Entity
public class Model {

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getValue() {
        return value;
    }

    public void setId(String value) {
        this.value = value;
    }

    @Id
    @Column(name="id")
    private Long id;

    @Convert(converter = EmptyStringToNull.class)
    @Column(name="value")
    private String value;
}

Model m = new Model();
m.setId(1);
m.setValue("");
em.persist(m);
em.find(Entity.class, 1).getValue() //returns ""

...
em.persist(m);
getEntityManagerFactory().getCache().evictAll();
em.find(Entity.class, 1).getValue() //returns null