org.hibernate.ogm.datastore.neo4j

Class Neo4jDialect

java.lang.Object

org.hibernate.ogm.dialect.spi.BaseGridDialect

org.hibernate.ogm.datastore.neo4j.Neo4jDialect

All Implemented Interfaces:

Serializable, QueryableGridDialect<String>, GridDialect, SessionFactoryLifecycleAwareDialect, org.hibernate.service.Service, org.hibernate.service.spi.ServiceRegistryAwareService

public class Neo4jDialect
extends BaseGridDialect
implements QueryableGridDialect<String>, org.hibernate.service.spi.ServiceRegistryAwareService, SessionFactoryLifecycleAwareDialect

Abstracts Hibernate OGM from Neo4j.

A Tuple is saved as a Node where the columns are converted into properties of the node.
An Association is converted into a Relationship identified by the AssociationKey and the RowKey. The type of the relationship is the value returned by AssociationKeyMetadata.getCollectionRole().

If the value of a property is set to null the property will be removed (Neo4j does not allow to store null values).

Author:

Davide D'Alto <davide@hibernate.org>

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Neo4jDialect(Neo4jDatastoreProvider provider)

Method Summary

Modifier and Type	Method and Description
Association	createAssociation(AssociationKey associationKey, AssociationContext associationContext)
Tuple	createTuple(EntityKey key, TupleContext tupleContext)
ClosableIterator<Tuple>	executeBackendQuery(BackendQuery<String> backendQuery, org.hibernate.engine.spi.QueryParameters queryParameters)
void	forEachTuple(ModelConsumer consumer, EntityKeyMetadata... entityKeyMetadatas)
Association	getAssociation(AssociationKey associationKey, AssociationContext associationContext)
DuplicateInsertPreventionStrategy	getDuplicateInsertPreventionStrategy(EntityKeyMetadata entityKeyMetadata)
ParameterMetadataBuilder	getParameterMetadataBuilder()
Tuple	getTuple(EntityKey key, TupleContext context)
void	injectServices(org.hibernate.service.spi.ServiceRegistryImplementor serviceRegistry)
void	insertOrUpdateAssociation(AssociationKey key, Association association, AssociationContext associationContext)
void	insertOrUpdateTuple(EntityKey key, Tuple tuple, TupleContext tupleContext)
static boolean	isPartOfRegularEmbedded(String[] keyColumnNames, String column) A regular embedded is an element that it is embedded but it is not a key or a collection.
boolean	isStoredInEntityStructure(AssociationKeyMetadata associationKeyMetadata, AssociationTypeContext associationTypeContext)
Number	nextValue(NextValueRequest request)
GridType	overrideType(org.hibernate.type.Type type)
String	parseNativeQuery(String nativeQuery)
void	removeAssociation(AssociationKey key, AssociationContext associationContext)
void	removeTuple(EntityKey key, TupleContext tupleContext)
void	sessionFactoryCreated(org.hibernate.engine.spi.SessionFactoryImplementor sessionFactoryImplementor)
boolean	supportsSequences()

Methods inherited from class org.hibernate.ogm.dialect.spi.BaseGridDialect

getLockingStrategy

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.ogm.dialect.spi.GridDialect

getLockingStrategy

Constructor Detail

Neo4jDialect

public Neo4jDialect(Neo4jDatastoreProvider provider)

Method Detail

injectServices

public void injectServices(org.hibernate.service.spi.ServiceRegistryImplementor serviceRegistry)

Specified by:

injectServices in interface org.hibernate.service.spi.ServiceRegistryAwareService

sessionFactoryCreated

public void sessionFactoryCreated(org.hibernate.engine.spi.SessionFactoryImplementor sessionFactoryImplementor)

Specified by:

sessionFactoryCreated in interface SessionFactoryLifecycleAwareDialect

getTuple

public Tuple getTuple(EntityKey key,
                      TupleContext context)

Specified by:

getTuple in interface GridDialect

createTuple

public Tuple createTuple(EntityKey key,
                         TupleContext tupleContext)

Specified by:

createTuple in interface GridDialect

insertOrUpdateTuple

public void insertOrUpdateTuple(EntityKey key,
                                Tuple tuple,
                                TupleContext tupleContext)

Specified by:

insertOrUpdateTuple in interface GridDialect

removeTuple

public void removeTuple(EntityKey key,
                        TupleContext tupleContext)

Specified by:

removeTuple in interface GridDialect

getAssociation

public Association getAssociation(AssociationKey associationKey,
                                  AssociationContext associationContext)

Specified by:

getAssociation in interface GridDialect

createAssociation

public Association createAssociation(AssociationKey associationKey,
                                     AssociationContext associationContext)

Specified by:

createAssociation in interface GridDialect

insertOrUpdateAssociation

public void insertOrUpdateAssociation(AssociationKey key,
                                      Association association,
                                      AssociationContext associationContext)

Specified by:

insertOrUpdateAssociation in interface GridDialect

isStoredInEntityStructure

public boolean isStoredInEntityStructure(AssociationKeyMetadata associationKeyMetadata,
                                         AssociationTypeContext associationTypeContext)

Specified by:

isStoredInEntityStructure in interface GridDialect

nextValue

public Number nextValue(NextValueRequest request)

Specified by:

nextValue in interface GridDialect

supportsSequences

public boolean supportsSequences()

Specified by:

supportsSequences in interface GridDialect

Overrides:

supportsSequences in class BaseGridDialect

overrideType

public GridType overrideType(org.hibernate.type.Type type)

Specified by:

overrideType in interface GridDialect

Overrides:

overrideType in class BaseGridDialect

removeAssociation

public void removeAssociation(AssociationKey key,
                              AssociationContext associationContext)

Specified by:

removeAssociation in interface GridDialect

isPartOfRegularEmbedded

public static boolean isPartOfRegularEmbedded(String[] keyColumnNames,
                                              String column)

A regular embedded is an element that it is embedded but it is not a key or a collection.

Parameters:

keyColumnNames - the column names representing the identifier of the entity

column - the column we want to check

Returns:

true if the column represent an attribute of a regular embedded element, false otherwise

forEachTuple

public void forEachTuple(ModelConsumer consumer,
                         EntityKeyMetadata... entityKeyMetadatas)

Specified by:

forEachTuple in interface GridDialect

executeBackendQuery

public ClosableIterator<Tuple> executeBackendQuery(BackendQuery<String> backendQuery,
                                                   org.hibernate.engine.spi.QueryParameters queryParameters)

Specified by:

executeBackendQuery in interface QueryableGridDialect<String>

parseNativeQuery

public String parseNativeQuery(String nativeQuery)

Specified by:

parseNativeQuery in interface QueryableGridDialect<String>

getParameterMetadataBuilder

public ParameterMetadataBuilder getParameterMetadataBuilder()

Specified by:

getParameterMetadataBuilder in interface QueryableGridDialect<String>

getDuplicateInsertPreventionStrategy

public DuplicateInsertPreventionStrategy getDuplicateInsertPreventionStrategy(EntityKeyMetadata entityKeyMetadata)

Specified by:

getDuplicateInsertPreventionStrategy in interface GridDialect

Overrides:

getDuplicateInsertPreventionStrategy in class BaseGridDialect