org.springframework.data.neo4j.cross_store.support.node

Class CrossStoreNodeEntityInstantiator

java.lang.Object

org.springframework.data.neo4j.cross_store.support.node.CrossStoreNodeEntityInstantiator

All Implemented Interfaces:

EntityInstantiator<org.neo4j.graphdb.Node>

public class CrossStoreNodeEntityInstantiator
extends Object
implements EntityInstantiator<org.neo4j.graphdb.Node>

Entity instantiator for Node entities that takes into account that the entity is persisted in a JPA store as well.

Since:

02.10.2010

Author:

Michael Hunger

Constructor Summary

Constructors

Constructor and Description
CrossStoreNodeEntityInstantiator(NodeEntityInstantiator delegate, javax.persistence.EntityManagerFactory entityManagerFactory)

Method Summary

Methods

Modifier and Type	Method and Description
<T> T	createEntityFromState(org.neo4j.graphdb.Node n, Class<T> entityClass, MappingPolicy mappingPolicy) Takes the JPA id stored in the "FOREIGN_ID" property of the node for a EntityManager.find(Class, Object) operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

CrossStoreNodeEntityInstantiator

public CrossStoreNodeEntityInstantiator(NodeEntityInstantiator delegate,
                                javax.persistence.EntityManagerFactory entityManagerFactory)

Method Detail

createEntityFromState

public <T> T createEntityFromState(org.neo4j.graphdb.Node n,
                          Class<T> entityClass,
                          MappingPolicy mappingPolicy)

Takes the JPA id stored in the "FOREIGN_ID" property of the node for a EntityManager.find(Class, Object) operation. If the entity is found its instance is associated with the graph node and returned otherwise a new node entity instance for this node is created by the original EntityInstantiator.

Specified by:

createEntityFromState in interface EntityInstantiator<org.neo4j.graphdb.Node>

Type Parameters:

T - generic type of the entity

Parameters:

n - Node to instantiate an entity for

entityClass - type of the entity