Package com.google.cloud.spring.data.datastore.core.convert

Class DefaultDatastoreEntityConverter

java.lang.Object

com.google.cloud.spring.data.datastore.core.convert.DefaultDatastoreEntityConverter

All Implemented Interfaces:

DatastoreEntityConverter, org.springframework.data.convert.EntityReader<Object,com.google.cloud.datastore.BaseEntity>, org.springframework.data.convert.EntityWriter<Object,com.google.cloud.datastore.BaseEntity.Builder>

public class DefaultDatastoreEntityConverter
extends Object
implements DatastoreEntityConverter

A class for object to entity and entity to object conversions.

Since:

1.1

Constructor Summary

Constructors

Constructor	Description
DefaultDatastoreEntityConverter(DatastoreMappingContext mappingContext, ObjectToKeyFactory objectToKeyFactory)
DefaultDatastoreEntityConverter(DatastoreMappingContext mappingContext, ReadWriteConversions conversions)

Method Summary

Modifier and Type	Method	Description
ReadWriteConversions	getConversions()	Get the ReadWriteConversions used in this converter.
<T> DatastorePersistentEntity<T>	getDiscriminationPersistentEntity(Class<T> entityClass, com.google.cloud.datastore.BaseEntity<?> entity)	Provide a DatastorePersistentEntity with support for discriminator fields.
<R> R	read(Class<R> clazz, com.google.cloud.datastore.BaseEntity entity)
<T, R> Map<T,R>	readAsMap(com.google.cloud.datastore.BaseEntity entity, org.springframework.data.util.TypeInformation mapTypeInformation)	Read the entity as a Map.
<T, R> Map<T,R>	readAsMap(Class<T> keyType, org.springframework.data.util.TypeInformation<R> componentType, com.google.cloud.datastore.BaseEntity entity)	Read the entity as a Map when the map type is unknown.
void	write(Object source, com.google.cloud.datastore.BaseEntity.Builder sink)

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultDatastoreEntityConverter

public DefaultDatastoreEntityConverter(DatastoreMappingContext mappingContext,
 ObjectToKeyFactory objectToKeyFactory)

DefaultDatastoreEntityConverter

public DefaultDatastoreEntityConverter(DatastoreMappingContext mappingContext,
 ReadWriteConversions conversions)

Method Details

getConversions

public ReadWriteConversions getConversions()

Description copied from interface: DatastoreEntityConverter

Get the ReadWriteConversions used in this converter.

Specified by:

getConversions in interface DatastoreEntityConverter

Returns:

the conversions used.

readAsMap

public <T,
R> Map<T,R> readAsMap(com.google.cloud.datastore.BaseEntity entity,
 org.springframework.data.util.TypeInformation mapTypeInformation)

Description copied from interface: DatastoreEntityConverter

Read the entity as a Map.

Specified by:

readAsMap in interface DatastoreEntityConverter

Type Parameters:

T - the type of the key in the map

R - the type of the value in the map

Parameters:

entity - the entity from Cloud Datastore.

mapTypeInformation - the actual type of the map

Returns:

a Map where the key values are the field names and the values the field values.

readAsMap

public <T,
R> Map<T,R> readAsMap(Class<T> keyType,
 org.springframework.data.util.TypeInformation<R> componentType,
 com.google.cloud.datastore.BaseEntity entity)

Description copied from interface: DatastoreEntityConverter

Read the entity as a Map when the map type is unknown.

Specified by:

readAsMap in interface DatastoreEntityConverter

Type Parameters:

T - the type of the key in the map

R - the type of the value in the map

Parameters:

keyType - the key type of the map to be read.

componentType - the value type of the map, into which each field value will be converted.

entity - the entity from Cloud Datastore.

Returns:

a Map where the key values are the field names and the values the field values.

getDiscriminationPersistentEntity

public <T> DatastorePersistentEntity<T> getDiscriminationPersistentEntity(Class<T> entityClass,
 com.google.cloud.datastore.BaseEntity<?> entity)

Description copied from interface: DatastoreEntityConverter

Provide a DatastorePersistentEntity with support for discriminator fields.

Specified by:

getDiscriminationPersistentEntity in interface DatastoreEntityConverter

Type Parameters:

T - the type of the entity

Parameters:

entityClass - the entity class

entity - the Datastore entity

Returns:

DatastorePersistentEntity for the entity type with support for discriminator fields.

read

public <R> R read(Class<R> clazz,
 com.google.cloud.datastore.BaseEntity entity)

Specified by:

read in interface org.springframework.data.convert.EntityReader<Object,com.google.cloud.datastore.BaseEntity>

write

public void write(Object source,
 @NonNull
 com.google.cloud.datastore.BaseEntity.Builder sink)

Specified by:

write in interface org.springframework.data.convert.EntityWriter<Object,com.google.cloud.datastore.BaseEntity.Builder>