Package org.springframework.data.cassandra.core.cql

Class DataClassRowMapper<T>

java.lang.Object

org.springframework.data.cassandra.core.cql.BeanPropertyRowMapper<T>

org.springframework.data.cassandra.core.cql.DataClassRowMapper<T>

Type Parameters:

T - the result type

All Implemented Interfaces:

RowMapper<T>

public class DataClassRowMapper<T>
extends BeanPropertyRowMapper<T>

RowMapper implementation that converts a row into a new instance of the specified mapped target class. The mapped target class must be a top-level class and may either expose a data class constructor with named parameters corresponding to column names or classic bean property setters (or even a combination of both).

Note that this class extends BeanPropertyRowMapper and can therefore serve as a common choice for any mapped target class, flexibly adapting to constructor style versus setter methods in the mapped class.

Since:

3.1

Author:

Mark Paluch

Field Summary

Fields inherited from class org.springframework.data.cassandra.core.cql.BeanPropertyRowMapper

logger

Constructor Summary

Constructors

Constructor	Description
DataClassRowMapper(Class<T> mappedClass)	Create a new DataClassRowMapper.

Method Summary

Modifier and Type	Method	Description
protected T	constructMappedInstance(com.datastax.oss.driver.api.core.cql.Row row, TypeConverter tc)	Construct an instance of the mapped class for the current row.
protected void	initialize(Class<T> mappedClass)	Initialize the mapping meta-data for the given class.
static <T> DataClassRowMapper<T>	newInstance(Class<T> mappedClass)	Static factory method to create a new DataClassRowMapper.
static <T> DataClassRowMapper<T>	newInstance(Class<T> mappedClass, ConversionService conversionService)	Static factory method to create a new DataClassRowMapper.

Methods inherited from class org.springframework.data.cassandra.core.cql.BeanPropertyRowMapper

getColumnValue, getColumnValue, getConversionService, getMappedClass, initBeanWrapper, isCheckFullyPopulated, isPrimitivesDefaultedForNullValue, lowerCaseName, mapRow, setCheckFullyPopulated, setConversionService, setMappedClass, setPrimitivesDefaultedForNullValue, underscoreName

Methods inherited from class java.lang.Object

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

Constructor Details

DataClassRowMapper

public DataClassRowMapper(Class<T> mappedClass)

Create a new DataClassRowMapper.

Parameters:

mappedClass - the class that each row should be mapped to.

Method Details

initialize

protected void initialize(Class<T> mappedClass)

Description copied from class: BeanPropertyRowMapper

Initialize the mapping meta-data for the given class.

Overrides:

initialize in class BeanPropertyRowMapper<T>

Parameters:

mappedClass - the mapped class

constructMappedInstance

protected T constructMappedInstance(com.datastax.oss.driver.api.core.cql.Row row,
 TypeConverter tc)

Description copied from class: BeanPropertyRowMapper

Construct an instance of the mapped class for the current row.

Overrides:

constructMappedInstance in class BeanPropertyRowMapper<T>

Parameters:

row - the row to map (pre-initialized for the current row)

tc - a TypeConverter with this RowMapper's conversion service

Returns:

a corresponding instance of the mapped class

newInstance

public static <T> DataClassRowMapper<T> newInstance(Class<T> mappedClass)

Static factory method to create a new DataClassRowMapper.

Parameters:

mappedClass - the class that each row should be mapped to.

See Also:

• newInstance(Class, ConversionService)

newInstance

public static <T> DataClassRowMapper<T> newInstance(Class<T> mappedClass,
 @Nullable
 ConversionService conversionService)

Static factory method to create a new DataClassRowMapper.

Parameters:

mappedClass - the class that each row should be mapped to.

conversionService - the ConversionService for binding Cassandra values to bean properties, or null for none.

See Also:

• newInstance(Class)
• BeanPropertyRowMapper.setConversionService(org.springframework.core.convert.ConversionService)