Package org.springframework.data.r2dbc.convert

Class MappingR2dbcConverter

java.lang.Object

org.springframework.data.relational.core.conversion.BasicRelationalConverter

org.springframework.data.r2dbc.convert.MappingR2dbcConverter

All Implemented Interfaces:

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

public class MappingR2dbcConverter
extends BasicRelationalConverter
implements R2dbcConverter

Converter for R2DBC.

Author:

Mark Paluch, Oliver Drotbohm

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, io.r2dbc.spi.RowMetadata metadata)	Reads the given source into the given type.
Object	readValue(Object value, TypeInformation<?> type)	Read a relational value into the desired destination type.
void	write(Object source, OutboundRow sink)

Methods inherited from class org.springframework.data.relational.core.conversion.BasicRelationalConverter

createInstance, getConversions, getConversionService, getEntityInstantiators, getMappingContext, getPropertyAccessor, writeValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.data.r2dbc.convert.R2dbcConverter

getConversionService, getMappingContext

Methods inherited from interface org.springframework.data.relational.core.conversion.RelationalConverter

createInstance, getEntityInstantiators, getPropertyAccessor, 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:

readValue

public Object readValue(@Nullable
 Object value,
 TypeInformation<?> type)

Description copied from interface: RelationalConverter

Read a relational value into the desired destination type.

Specified by:

readValue in interface RelationalConverter

Overrides:

readValue in class BasicRelationalConverter

Parameters:

value - a value as it is returned by the driver accessing the persistence store. May be null.

type - TypeInformation into which the value is to be converted. Must not be null.

Returns:

The converted value. May be null.

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.

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: