liquibase.executor.jvm.ResultSetExtractor Maven / Gradle / Ivy
package liquibase.executor.jvm;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* Callback interface used by {@link liquibase.executor.Executor}'s query methods.
* Implementations of this interface perform the actual work of extracting
* results from a {@link java.sql.ResultSet}, but don't need to worry
* about exception handling. {@link java.sql.SQLException SQLExceptions}
* will be caught and handled by the calling JdbcTemplate.
*
*
* @author Spring Framework
* @see liquibase.executor.Executor
* @see RowCallbackHandler
* @see RowMapper
*/
interface ResultSetExtractor {
/**
* Implementations must implement this method to process the entire ResultSet.
*
* @param rs ResultSet to extract data from. Implementations should
* not close this: it will be closed by the calling JdbcTemplate.
* @return an arbitrary result object, or null if none
* (the extractor will typically be stateful in the latter case).
* @throws java.sql.SQLException if a SQLException is encountered getting column
* values or navigating (that is, there's no need to catch SQLException)
* @throws liquibase.exception.DatabaseException in case of custom exceptions
*/
Object extractData(ResultSet rs) throws SQLException;
}