There is another potential solution for this issue:
Assuming:
Parent.class contains a list of Child.class with backreferences to Parent
You can use an XmlAdapter (using @XmlJavaTypeAdapter(ParentAdapter.class)
Child.getParent())
This allows you to modify the value of Child.getParent() that is marshalled into XML containing the parent Id. On return trip/unmarshalling, the parent field will be populated with a new object containing only "id" -- it prevents nullpointers, but might be somewhat misleading... null may be preferred, in which case, use the @XmlTransient solution.
import javax.xml.bind.annotation.adapters.XmlAdapter;
public class ParentAdapter extends XmlAdapter<Long, Feature>
{
@Override
public Long marshal(Feature feature) throws Exception
{
return feature.getId();
}
@Override
public Feature unmarshal(Long id) throws Exception
{
return new Feature().setId(id);
}
}
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