private static void addResourceIdentifierSet( SolrInputDocument doc, Collection<DcsResourceIdentifier> set) { if (set == null || set.size() == 0) { return; } for (DcsResourceIdentifier id : set) { setadd(doc, ResourceIdentifierField.AUTHORITY, id.getAuthorityId()); setadd(doc, ResourceIdentifierField.TYPE, id.getTypeId()); setadd(doc, ResourceIdentifierField.VALUE, id.getIdValue()); } }