Package org.jdbi.v3.core.mapper

Class MapMapper

java.lang.Object

org.jdbi.v3.core.mapper.MapMapper

All Implemented Interfaces:

RowMapper<Map<String,Object>>

public class MapMapper
extends Object
implements RowMapper<Map<String,Object>>

Yo dawg, I heard you like maps, so I made you a mapper that maps rows into Map<String,Object>. Map keys are column names, while map values are the values in those columns. Map keys are converted to lowercase by default.

See Also:

• GenericMapMapperFactory

Constructor Summary

Constructors

Constructor	Description
MapMapper()	Constructs a new MapMapper and delegates case control to MapMappers.
MapMapper(boolean toLowerCase)	Constructs a new MapMapper

Method Summary

Modifier and Type	Method	Description
Map<String,Object>	map(ResultSet rs, StatementContext ctx)	Map the current row of the result set.
RowMapper<Map<String,Object>>	specialize(ResultSet rs, StatementContext ctx)	Returns a specialized row mapper, optimized for the given result set.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.jdbi.v3.core.mapper.RowMapper

init

Constructor Details

MapMapper

public MapMapper()

Constructs a new MapMapper and delegates case control to MapMappers.

MapMapper

public MapMapper(boolean toLowerCase)

Constructs a new MapMapper

Parameters:

toLowerCase - if true, column names are converted to lowercase in the mapped Map. If false, nothing is done. Use the other constructor to delegate case control to MapMappers instead.

Method Details

map

public Map<String,Object> 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<Map<String,Object>>

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

specialize

public RowMapper<Map<String,Object>> 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<Map<String,Object>>

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.