org.jdbi.v3.core.mapper

Interface RowViewMapper<T>

Type Parameters:

T -

All Superinterfaces:

RowMapper<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
 @Beta
public interface RowViewMapper<T>
extends RowMapper<T>

Higher level cousin of RowMapper that operates over RowViews rather than the bare ResultSet.

Method Summary

Modifier and Type	Method and Description
default T	map(ResultSet rs, StatementContext ctx) Map the current row of the result set.
T	map(RowView rowView) Produce a single result item from the current row of a RowView.
default RowMapper<T>	specialize(ResultSet rs, StatementContext ctx) Returns a specialized row mapper, optimized for the given result set.

Method Detail

map

default T map(ResultSet rs,
              StatementContext ctx)
       throws SQLException

Description copied from interface: RowMapper

Map the current row of the result set. This method should not cause the result set to advance; allow Jdbi to do that, please.

Specified by:

map in interface RowMapper<T>

Parameters:

rs - the result set being iterated

ctx - the statement context

Returns:

the value to produce for this row

Throws:

SQLException - if anything goes wrong go ahead and let this percolate; Jdbi will handle it

map

T map(RowView rowView)
throws SQLException

Produce a single result item from the current row of a RowView.

Parameters:

rowView - the view into the current row of the ResultSet

Returns:

the produced result

Throws:

SQLException - something went wrong

specialize

default RowMapper<T> specialize(ResultSet rs,
                                StatementContext ctx)
                         throws SQLException

Description copied from interface: RowMapper

Returns a specialized row mapper, optimized for the given result set.

Before mapping the result set from a SQL statement; Jdbi will first call this method to obtain a specialized instance. The returned mapper will then be used to map the result set rows, and discarded.

Implementing this method is optional; the default implementation returns this. Implementors might choose to override this method to improve performance, e.g. by matching up column names to properties once for the entire result set, rather than repeating the process for every row.

Specified by:

specialize in interface RowMapper<T>

Parameters:

rs - the result set to specialize over

ctx - the statement context to specialize over

Returns:

a row mapper equivalent to this one, possibly specialized.

Throws:

SQLException - if anything goes wrong go ahead and let this percolate; Jdbi will handle it

See Also:

for an example of specialization.