if (oneToOne != null)
introspectOneToOne(oneToOne);
JoinColumn joinColumnAnn = _field.getAnnotation(JoinColumn.class);
JoinColumns joinColumnsAnn = _field.getAnnotation(JoinColumns.class);
if (joinColumnsAnn != null && joinColumnAnn != null) {
throw error(_field, L.l("{0} may not have both @JoinColumn and @JoinColumns",
_fieldName));
}
if (joinColumnsAnn != null)
introspectJoinColumns(joinColumnsAnn.value());
else if (joinColumnAnn != null)
introspectJoinColumns(new JoinColumn[] { joinColumnAnn });
}