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package org.simpleflatmapper.jdbc;
import org.simpleflatmapper.map.MappingException;
import org.simpleflatmapper.map.SetRowMapper;
import org.simpleflatmapper.map.context.MappingContextFactoryFromRows;
import org.simpleflatmapper.util.CheckedConsumer;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Iterator;
//IFJAVA8_START
import java.util.stream.Stream;
//IFJAVA8_END
/**
* JdbcMapper will map from a {@link java.sql.ResultSet} to an object of the specified type T
*
* JdbcMapper are instantiable via {@link JdbcMapperFactory}.
*
*
* JdbcMapper<MyClass> jdbcMapper = JdbcMapperFactory.newInstance().newMapper(MyClass.class);
*
* ...
*
* try (ResultSet rs : ps.executeQuery()){
* jdbcMapper.stream(rs).forEach(System.out::println);
* }
*
*
* @param the type that the jdbcMapper is mapping to
* @see JdbcMapperFactory
*/
public interface JdbcMapper extends SetRowMapper, MappingContextFactoryFromRows
{
/**
* map the current row of the ResultSet to a new newInstance of T.
* This method does not manage the iteration of the ResultSet and will only map the current row. No join aggregation will be performed.
* @param rs the resultSet
* @return a new mapped newInstance of T
* @throws MappingException if an exception occurs
*/
T map(ResultSet rs) throws MappingException;
/**
* Loop over the resultSet, map each row to a new newInstance of T and call back the handler.
*
* The method will return the handler passed as an argument so you can easily chain the calls like
*
* List<T> list = jdbcMapper.forEach(rs, new ListHandler<T>()).getList();
*
*
*
* @param rs the resultSet
* @param handler the handler that will get the callback
* @param the row handler type
* @return the handler passed in
* @throws SQLException if sql error occurs
* @throws MappingException if an error occurs during the mapping
*
*/
> H forEach(final ResultSet rs, final H handler)
throws SQLException, MappingException;
/**
*
* @param rs the result set
* @return an iterator that will return a map object for each row of the result set.
* @throws SQLException if sql error occurs
* @throws MappingException if an error occurs during the mapping
*/
Iterator iterator(ResultSet rs)
throws SQLException, MappingException;
/**
*
* @param rs the result set
* @return a stream that will contain a map object for each row of the result set.
* @throws SQLException if sql error occurs
* @throws MappingException if an error occurs during the mapping
*/
//IFJAVA8_START
Stream stream(ResultSet rs) throws SQLException, MappingException;
//IFJAVA8_END
}