QueryCriteria queryCriteria = new QueryCriteria.VaultQueryCriteria(Vault.StateStatus.UNCONSUMED);

Sort.SortColumn sortCol = new Sort.SortColumn(new SortAttribute.Custom(CustomerSchema.CustomerEntity.class, "changeDate"), Sort.Direction.DESC);
List list = new ArrayList();
list.add(sortCol);
List<StateAndRef<CustomerState>> list = rpcOps().vaultQueryBy(queryCriteria, pageSpecification, new Sort(sortList), CustomerState.class).getStates();

QueryCriteria baseCriteria = new QueryCriteria.VaultCustomQueryCriteria(Builder.notNull(getField("linearId", CustomerSchemaV01.CustomerEntity.class)));
queryCriteria = queryCriteria.and(baseCriteria);