Question

I have a problem using Eclipselink 2.2.0 to map an inheritance.
Here is my abstract entity:

@Entity
@Inheritance(strategy= InheritanceType.SINGLE_TABLE)
public abstract class Feature extends TenantPossession {

    private FeatureType featureType;

    @Enumerated(EnumType.STRING)
    public FeatureType getFeatureType() {
        return featureType;
    }

    public void setFeatureType(FeatureType featureType) {
        this.featureType = featureType;
    }
}

The sub class looks like this:

@Entity
public class RecordingFeature extends Feature {
    // here some attributes
}

When I save the feature for the first time it works fine. But then when I try to set the feature type and save it, nothing happens.

Feature feature = new RecordingFeature();
feature.setType(FeatureType.RECORDING);
feature = featureService.save(feature); // works fine

…commit transaction and start another transaction…

feature.setType(FeatureType.UNKNOWN);
feature = featureService.save(feature); // seems to work, but type is not set in DB

Does it have something to do with the inheritance? I have another cases in code without inheritance that work fine.

Answer 1

What does save() do? Ensure you are changing the managed version of the object, not a detached object.

Do you have weaving enabled? What happens if you disable weaving (change-tracking)?