Customize JPA field name mapping using EclipseLink

Question

I need to map camel-case names to underscore-separated names in my current project, which uses EclipseLink, due to historical reasons. I know we can customize name mapping i

Answer 1

Instead of

directMapping.setFieldName(nameMap.get(oldFieldName ));

try:

directMapping.getField().resetQualifiedName(nameMap.get(oldFieldName));

This does the trick for me under EclipseLink 2.5.0