org.hibernate.ogm.datastore.neo4j.embedded.dialect.impl

Class EmbeddedNeo4jEntityQueries

java.lang.Object

org.hibernate.ogm.datastore.neo4j.dialect.impl.BaseNeo4jEntityQueries

org.hibernate.ogm.datastore.neo4j.embedded.dialect.impl.EmbeddedNeo4jEntityQueries

public class EmbeddedNeo4jEntityQueries
extends BaseNeo4jEntityQueries

Container for the queries related to one entity type in Neo4j. Unfortunately, we cannot use the same queries for all entities, as Neo4j does not allow to parameterize on node labels which would be required, as the entity name is stored as a label.

Author:

Davide D'Alto

Field Summary

Fields inherited from class org.hibernate.ogm.datastore.neo4j.dialect.impl.BaseNeo4jEntityQueries

EMBEDDED_ALIAS, EMBEDDED_REL, ENTITY_ALIAS

Constructor Summary

Constructors

Constructor and Description
EmbeddedNeo4jEntityQueries(EntityKeyMetadata entityKeyMetadata)
EmbeddedNeo4jEntityQueries(EntityKeyMetadata entityKeyMetadata, TupleTypeContext tupleTypeContext)

Method Summary

Modifier and Type	Method and Description
org.neo4j.graphdb.Node	createEmbedded(org.neo4j.graphdb.GraphDatabaseService executionEngine, Object[] columnValues) Create a single node representing an embedded element.
org.neo4j.graphdb.ResourceIterator<org.neo4j.graphdb.Relationship>	findAssociation(org.neo4j.graphdb.GraphDatabaseService executionEngine, Object[] columnValues, String role) Find the relationships representing the association.
org.neo4j.graphdb.ResourceIterator<org.neo4j.graphdb.Node>	findEntities(org.neo4j.graphdb.GraphDatabaseService executionEngine) Find all the node representing the entity.
org.neo4j.graphdb.ResourceIterator<org.neo4j.graphdb.Node>	findEntities(org.neo4j.graphdb.GraphDatabaseService executionEngine, EntityKey[] keys) Find the nodes corresponding to an array of entity keys.
org.neo4j.graphdb.Node	findEntity(org.neo4j.graphdb.GraphDatabaseService executionEngine, Object[] columnValues) Find the node corresponding to an entity.
org.neo4j.graphdb.Node	insertEntity(org.neo4j.graphdb.GraphDatabaseService executionEngine, Object[] columnValues) Creates the node corresponding to an entity.
void	removeEntity(org.neo4j.graphdb.GraphDatabaseService executionEngine, Object[] columnValues) Remove the nodes representing the entity and the embedded elements attached to it.
void	updateEmbeddedColumn(org.neo4j.graphdb.GraphDatabaseService executionEngine, Object[] keyValues, String embeddedColumn, Object value) Update the value of an embedded node property.

Methods inherited from class org.hibernate.ogm.datastore.neo4j.dialect.impl.BaseNeo4jEntityQueries

getCreateEmbeddedNodeQuery, getCreateEntityQuery, getCreateEntityWithPropertiesQuery, getFindAssociatedEntityQuery, getFindAssociatedEntityQuery, getFindAssociationPartialQuery, getFindAssociationQuery, getFindEmbeddedNodeQueries, getFindEntitiesQuery, getFindEntityQuery, getFindEntityWithEmbeddedEndNodeQuery, getRemoveColumnQuery, getRemoveEmbeddedPropertyQuery, getRemoveEntityQuery, getRemovePropertyQueries, getRemoveToOneAssociation, getUpdateEmbeddedColumnQuery, getUpdateEmbeddedNodeQuery, getUpdateEntityProperties, getUpdateEntityPropertiesQuery, getUpdateToOneQuery

Methods inherited from class java.lang.Object

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

Constructor Detail

EmbeddedNeo4jEntityQueries

public EmbeddedNeo4jEntityQueries(EntityKeyMetadata entityKeyMetadata)

EmbeddedNeo4jEntityQueries

public EmbeddedNeo4jEntityQueries(EntityKeyMetadata entityKeyMetadata,
                                  TupleTypeContext tupleTypeContext)

Method Detail

findAssociation

public org.neo4j.graphdb.ResourceIterator<org.neo4j.graphdb.Relationship> findAssociation(org.neo4j.graphdb.GraphDatabaseService executionEngine,
                                                                                          Object[] columnValues,
                                                                                          String role)

Find the relationships representing the association.

Parameters:

executionEngine - the queries executor

columnValues - the values for the entity key column names of the owner node

role - the relationship type mapping the role of the association

Returns:

an iterator on the results

createEmbedded

public org.neo4j.graphdb.Node createEmbedded(org.neo4j.graphdb.GraphDatabaseService executionEngine,
                                             Object[] columnValues)

Create a single node representing an embedded element.

Parameters:

executionEngine - the GraphDatabaseService used to run the query

columnValues - the values in EntityKey.getColumnValues()

Returns:

the corresponding node;

findEntity

public org.neo4j.graphdb.Node findEntity(org.neo4j.graphdb.GraphDatabaseService executionEngine,
                                         Object[] columnValues)

Find the node corresponding to an entity.

Parameters:

executionEngine - the GraphDatabaseService used to run the query

columnValues - the values in EntityKey.getColumnValues()

Returns:

the corresponding node

findEntities

public org.neo4j.graphdb.ResourceIterator<org.neo4j.graphdb.Node> findEntities(org.neo4j.graphdb.GraphDatabaseService executionEngine,
                                                                               EntityKey[] keys)

Find the nodes corresponding to an array of entity keys.

Parameters:

executionEngine - the GraphDatabaseService used to run the query

keys - an array of keys identifying the nodes to return

Returns:

the list of nodes representing the entities

insertEntity

public org.neo4j.graphdb.Node insertEntity(org.neo4j.graphdb.GraphDatabaseService executionEngine,
                                           Object[] columnValues)

Creates the node corresponding to an entity.

Parameters:

executionEngine - the GraphDatabaseService used to run the query

columnValues - the values in EntityKey.getColumnValues()

Returns:

the corresponding node

findEntities

public org.neo4j.graphdb.ResourceIterator<org.neo4j.graphdb.Node> findEntities(org.neo4j.graphdb.GraphDatabaseService executionEngine)

Find all the node representing the entity.

Parameters:

executionEngine - the GraphDatabaseService used to run the query

Returns:

an iterator over the nodes representing an entity

removeEntity

public void removeEntity(org.neo4j.graphdb.GraphDatabaseService executionEngine,
                         Object[] columnValues)

Remove the nodes representing the entity and the embedded elements attached to it.

Parameters:

executionEngine - the GraphDatabaseService used to run the query

columnValues - the values of the key identifying the entity to remove

updateEmbeddedColumn

public void updateEmbeddedColumn(org.neo4j.graphdb.GraphDatabaseService executionEngine,
                                 Object[] keyValues,
                                 String embeddedColumn,
                                 Object value)

Update the value of an embedded node property.

Parameters:

executionEngine - the GraphDatabaseService used to run the query

keyValues - the columns representing the identifier in the entity owning the embedded

embeddedColumn - the column on the embedded node (dot-separated properties)

value - the new value for the property