Extension of RowCallbackHandler interface that saves the accumulated results
as a List.
Allows to make a results list available in a uniform manner. JdbcTemplate's
query methods will return the results list in that case, else returning null
(-> result state is solely available from RowCallbackHandler object).
A convenient out-of-the-box implementation of ResultReader is the
RowMapperResultReader adapter which delegates row mapping to a RowMapper.
Note that a RowMapper object is typically stateless and thus reusable;
just the RowMapperResultReader adapter is stateful.
Allows to make a results list available in a uniform manner. JdbcTemplate's query methods will return the results list in that case, else returning null (-> result state is solely available from RowCallbackHandler object).
A convenient out-of-the-box implementation of ResultReader is the RowMapperResultReader adapter which delegates row mapping to a RowMapper. Note that a RowMapper object is typically stateless and thus reusable; just the RowMapperResultReader adapter is stateful.