package liquibase.executor.jvm;

 import java.sql.ResultSet;

 import java.sql.SQLException;

 /**

  * An interface used by {@link liquibase.executor.Executor} for mapping rows of a {@link java.sql.ResultSet} on a

  * per-row basis. Implementations of this interface perform the actual work of mapping each row to a result object, but

  * don't need to worry about exception handling. {@link java.sql.SQLException SQLExceptions} will be caught and handled

  * by the calling JdbcTemplate.

  * <p/>

  * 

  * @author Spring Framework

  * @see liquibase.executor.Executor

  * @see RowCallbackHandler

  * @see ResultSetExtractor

  */

 public interface RowMapper {

     /**

      * Implementations must implement this method to map each row of data in the ResultSet. This method should not call

      * <code>next()</code> on the ResultSet; it is only supposed to map values of the current row.

      * 

      * @param rs

      *            the ResultSet to map (pre-initialized for the current row)

      * @param rowNum

      *            the number of the current row

      * @return the result object for the current row

      * @throws java.sql.SQLException

      *             if a SQLException is encountered getting column values (that is, there's no need to catch

      *             SQLException)

      */

     Object mapRow(ResultSet rs, int rowNum) throws SQLException;

 }