getMetadata().setJoinColumns(new ArrayList<JoinColumnMetadata>());
getMetadata().setInverseJoinColumns(new ArrayList<JoinColumnMetadata>());
}
public JoinColumn addInverseJoinColumn() {
JoinColumnImpl joinColumn = new JoinColumnImpl();
getMetadata().getInverseJoinColumns().add(joinColumn.getMetadata());
return joinColumn;
}