Fake

Fake objects are working implementations; mostly, the fake class extends the original class, but it usually hacks the performance, which makes it unsuitable for production. The following example demonstrates the fake object:

public class AddressDao extends SimpleJdbcDaoSupport{

  public void batchInsertOrUpdate(List<AddressDTO> addressList, User user){
    List<AddressDTO> insertList = buildListWhereLastChangeTimeMissing(addressList);

    List<AddressDTO> updateList = buildListWhereLastChangeTimeValued(addressList);
    int rowCount =  0;

    if (!insertList.isEmpty()) {
      rowCount = getSimpleJdbcTemplate().batchUpdate(INSERT_SQL,…);
    }

    if (!updateList.isEmpty()){
      rowCount += getSimpleJdbcTemplate().batchUpdate(UPDATE_SQL,…);
    }

    if (addressList.size() != rowCount){
      raiseErrorForDataInconsistency(…); 
    }
}

AddressDAO extends from a Spring framework class and provides an API for mass update. The same method is used to create a new...