package liquibase.executor.jvm;

 import liquibase.exception.DatabaseException;

 import liquibase.statement.SqlStatement;

 import java.sql.SQLException;

 import java.sql.Statement;

 /**

  * Generic callback interface for code that operates on a JDBC Statement. Allows to execute any number of operations on

  * a single Statement, for example a single <code>executeUpdate</code> call or repeated <code>executeUpdate</code> calls

  * with varying SQL.

  * <p/>

  * <p>

  * Used internally by JdbcTemplate, but also useful for application code.

  * 

  * @author Spring Framework

  */

 interface StatementCallback {

     /**

      * Gets called by <code>JdbcTemplate.execute</code> with an active JDBC Statement. Does not need to care about

      * closing the Statement or the Connection, or about handling transactions: this will all be handled by

      * JdbcTemplate.

      * <p/>

      * 

      * @param stmt

      *            active JDBC Statement

      * @return a result object, or <code>null</code> if none

      */

     Object doInStatement(Statement stmt) throws SQLException, DatabaseException;

     SqlStatement getStatement();

 }