Class MappingR2dbcConverter

java.lang.Object

org.springframework.data.relational.core.conversion.AbstractRelationalConverter

org.springframework.data.relational.core.conversion.MappingRelationalConverter

org.springframework.data.r2dbc.convert.MappingR2dbcConverter

All Implemented Interfaces:

Aware, ApplicationContextAware, EnvironmentCapable, EntityReader<Object, io.r2dbc.spi.Row>, EntityWriter<Object, OutboundRow>, R2dbcConverter, RelationalConverter

public class MappingR2dbcConverter
extends MappingRelationalConverter
implements R2dbcConverter

Converter for R2DBC.

Author:

Mark Paluch, Oliver Drotbohm, Jens Schauder

Nested Class Summary

Nested classes/interfaces inherited from class MappingRelationalConverter

MappingRelationalConverter.AggregatePathValueProvider, MappingRelationalConverter.ConversionContext, MappingRelationalConverter.DefaultConversionContext, MappingRelationalConverter.DocumentValueProvider, MappingRelationalConverter.ProjectingConversionContext, MappingRelationalConverter.RelationalPropertyValueProvider

Constructor Summary

Constructors

Constructor	Description
MappingR2dbcConverter(MappingContext<? extends RelationalPersistentEntity<?>, ? extends RelationalPersistentProperty> context)	Creates a new MappingR2dbcConverter given MappingContext.
MappingR2dbcConverter(MappingContext<? extends RelationalPersistentEntity<?>, ? extends RelationalPersistentProperty> context, CustomConversions conversions)	Creates a new MappingR2dbcConverter given MappingContext and CustomConversions.

Method Summary

Modifier and Type	Method	Description
protected List<Object>	createCollection(Collection<?> collection, RelationalPersistentProperty property)	Writes the given Collection using the given RelationalPersistentProperty information.
Object	getArrayValue(ArrayColumns arrayColumns, RelationalPersistentProperty property, Object value)	Convert a value into an array representation according to ArrayColumns.
Class<?>	getTargetType(Class<?> valueType)	Return the target type for a value considering registered converters.
boolean	isSimpleType(Class<?> type)	Return whether the type is a simple type.
<T> BiFunction<io.r2dbc.spi.Row, io.r2dbc.spi.RowMetadata, T>	populateIdIfNecessary(T object)	Returns a Function that populates the id property of the object from a Row.
<R> R	read(Class<R> type, io.r2dbc.spi.Row row)
<R> R	read(Class<R> type, io.r2dbc.spi.Row row, @Nullable io.r2dbc.spi.RowMetadata metadata)	Reads the given source into the given type.
RowDocument	toRowDocument(Class<?> type, io.r2dbc.spi.Readable row, @Nullable Iterable<? extends io.r2dbc.spi.ReadableMetadata> metadata)	Create a flat RowDocument from a single Row or Stored Procedure output.
void	write(Object source, OutboundRow sink)

Methods inherited from class MappingRelationalConverter

doReadProjection, getConversionContext, getEnvironment, getPotentiallyConvertedSimpleRead, getPotentiallyConvertedSimpleWrite, getPropertyAccessor, introspectProjection, newProjectingConversionContext, newValueProvider, project, read, read, readAggregate, readAggregate, readCollectionOrArray, readMap, readValue, setApplicationContext, unwrap, writeValue

Methods inherited from class AbstractRelationalConverter

getConversions, getConversionService, getEntityInstantiators, getMappingContext

Methods inherited from class Object

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

Methods inherited from interface R2dbcConverter

getConversionService

Methods inherited from interface RelationalConverter

getEntityInstantiators, getMappingContext, getPropertyAccessor, introspectProjection, project, read, readValue, writeValue

Constructor Details

MappingR2dbcConverter

public MappingR2dbcConverter(MappingContext<? extends RelationalPersistentEntity<?>, ? extends RelationalPersistentProperty> context)

Creates a new MappingR2dbcConverter given MappingContext.

Parameters:

context - must not be null.

MappingR2dbcConverter

public MappingR2dbcConverter(MappingContext<? extends RelationalPersistentEntity<?>, ? extends RelationalPersistentProperty> context,
 CustomConversions conversions)

Creates a new MappingR2dbcConverter given MappingContext and CustomConversions.

Parameters:

context - must not be null.

Method Details

read

public <R> R read(Class<R> type,
 io.r2dbc.spi.Row row)

Specified by:

read in interface EntityReader<Object, io.r2dbc.spi.Row>

read

public <R> R read(Class<R> type,
 io.r2dbc.spi.Row row,
 @Nullable io.r2dbc.spi.RowMetadata metadata)

Description copied from interface: R2dbcConverter

Reads the given source into the given type.

Specified by:

read in interface R2dbcConverter

Parameters:

type - they type to convert the given source to.

row - the source to create an object of the given type from.

metadata - the RowMetadata.

Returns:

toRowDocument

public RowDocument toRowDocument(Class<?> type,
 io.r2dbc.spi.Readable row,
 @Nullable Iterable<? extends io.r2dbc.spi.ReadableMetadata> metadata)

Description copied from interface: R2dbcConverter

Create a flat RowDocument from a single Row or Stored Procedure output.

Specified by:

toRowDocument in interface R2dbcConverter

Parameters:

type - the underlying entity type.

row - the row or stored procedure output to retrieve data from.

metadata - readable metadata.

Returns:

the RowDocument containing the data.

write

public void write(Object source,
 OutboundRow sink)

Specified by:

write in interface EntityWriter<Object, OutboundRow>

createCollection

protected List<Object> createCollection(Collection<?> collection,
 RelationalPersistentProperty property)

Writes the given Collection using the given RelationalPersistentProperty information.

Parameters:

collection - must not be null.

property - must not be null.

Returns:

getArrayValue

public Object getArrayValue(ArrayColumns arrayColumns,
 RelationalPersistentProperty property,
 Object value)

Description copied from interface: R2dbcConverter

Convert a value into an array representation according to ArrayColumns.

Specified by:

getArrayValue in interface R2dbcConverter

Parameters:

arrayColumns - dialect-specific array handling configuration.

property -

value -

Returns:

getTargetType

public Class<?> getTargetType(Class<?> valueType)

Description copied from interface: R2dbcConverter

Return the target type for a value considering registered converters.

Specified by:

getTargetType in interface R2dbcConverter

Parameters:

valueType - must not be null.

Returns:

isSimpleType

public boolean isSimpleType(Class<?> type)

Description copied from interface: R2dbcConverter

Return whether the type is a simple type. Simple types are database primitives or types with a custom mapping strategy.

Specified by:

isSimpleType in interface R2dbcConverter

Parameters:

type - the type to inspect, must not be null.

Returns:

true if the type is a simple one.

See Also:

• SimpleTypeHolder

populateIdIfNecessary

public <T>
BiFunction<io.r2dbc.spi.Row, io.r2dbc.spi.RowMetadata, T> populateIdIfNecessary(T object)

Returns a Function that populates the id property of the object from a Row.

Specified by:

populateIdIfNecessary in interface R2dbcConverter

Parameters:

object - must not be null.

Returns: