public class ColumnMapRowMapper extends Object implements RowMapper<Map<String,Object>>
RowMapper
implementation that creates a java.util.Map
for each row, representing all columns as
key-value pairs: one entry for each column, with the column name as key.
The Map implementation to use and the key to use for each column in the column Map can be customized through
overriding createColumnMap(int)
and getColumnKey(java.lang.String)
, respectively.
Note: By default, ColumnMapRowMapper will try to build a linked Map with case-insensitive keys, to preserve column order as well as allow any casing to be used for column names. This requires Commons Collections on the classpath (which will be autodetected). Else, the fallback is a standard linked HashMap, which will still preserve column order but requires the application to specify the column names in the same casing as exposed by the driver.
ReactiveCqlTemplate.queryForFlux(String)
,
ReactiveCqlTemplate.queryForMap(String)
Constructor and Description |
---|
ColumnMapRowMapper() |
Modifier and Type | Method and Description |
---|---|
protected Map<String,Object> |
createColumnMap(int columnCount)
Create a
Map instance to be used as column map. |
protected String |
getColumnKey(String columnName)
Determine the key to use for the given column in the column Map.
|
protected Object |
getColumnValue(com.datastax.driver.core.Row row,
int index)
Retrieve a CQL object value for the specified column.
|
Map<String,Object> |
mapRow(com.datastax.driver.core.Row rs,
int rowNum)
Implementations must implement this method to map each row of data in the
ResultSet . |
public Map<String,Object> mapRow(com.datastax.driver.core.Row rs, int rowNum)
RowMapper
ResultSet
.protected Map<String,Object> createColumnMap(int columnCount)
Map
instance to be used as column map.
By default, a linked case-insensitive Map will be created.
columnCount
- the column count, to be used as initial capacity for the Map
, must not be
null.LinkedCaseInsensitiveMap
protected String getColumnKey(String columnName)
columnName
- the column name as returned by the Row
, must not be null.ColumnDefinitions.getName(int)
@Nullable protected Object getColumnValue(com.datastax.driver.core.Row row, int index)
The default implementation uses the getObject
method.
row
- is the Row
holding the data, must not be null.index
- is the column index.Copyright © 2011–2018 Pivotal Software, Inc.. All rights reserved.