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## org.springframework.jdbc.core
Interface RowCallbackHandler

All Known Implementing Classes:
  RowCountCallbackHandler

    public interface RowCallbackHandler

An interface used by `JdbcTemplate` for processing rows of a `ResultSet` on a per-row basis. Implementations of this interface perform the actual work of processing each row but don't need to worry about exception handling. `SQLExceptions` will be caught and handled by the calling JdbcTemplate.

In contrast to a `ResultSetExtractor`, a RowCallbackHandler object is typically stateful: It keeps the result state within the object, to be available for later inspection. See `RowCountCallbackHandler` for a usage example.

Consider using a `RowMapper` instead if you need to map exactly one result object per row, assembling them into a List.

Author:
  Rod Johnson, Juergen Hoeller
See Also:
  `JdbcTemplate`, `RowMapper`, `ResultSetExtractor`, `RowCountCallbackHandler`

Method Summary
`void` | `processRow(ResultSet rs)` Implementations must implement this method to process each row of data in the ResultSet.

Method Detail

### processRow

    void processRow(ResultSet rs)
                    throws SQLException

  Implementations must implement this method to process each row of data in the ResultSet. This method should not call `next()` on the ResultSet; it is only supposed to extract values of the current row.

  Exactly what the implementation chooses to do is up to it: A trivial implementation might simply count rows, while another implementation might build an XML document.

  Parameters:
    `rs` - the ResultSet to process (pre-initialized for the current row)
  Throws:
    `SQLException` - if a SQLException is encountered getting column values (that is, there's no need to catch SQLException)

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