org.springframework.data.jpa.repository.query

Class Jpa21Utils

java.lang.Object

org.springframework.data.jpa.repository.query.Jpa21Utils

public class Jpa21Utils
extends Object

Utils for bridging various JPA 2.1 features.

Since:

1.6

Author:

Thomas Darimont, Oliver Gierke

Method Summary

Modifier and Type	Method and Description
static <T extends javax.persistence.Query> T	tryConfigureFetchGraph(javax.persistence.EntityManager em, T query, JpaEntityGraph entityGraph) Adds a JPA 2.1 fetch-graph or load-graph hint to the given Query if running under JPA 2.1.
static javax.persistence.EntityGraph<?>	tryGetFetchGraph(javax.persistence.EntityManager em, JpaEntityGraph jpaEntityGraph) Adds a JPA 2.1 fetch-graph or load-graph hint to the given Query if running under JPA 2.1.

Methods inherited from class java.lang.Object

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

Method Detail

tryConfigureFetchGraph

public static <T extends javax.persistence.Query> T tryConfigureFetchGraph(javax.persistence.EntityManager em,
                                                                           T query,
                                                                           JpaEntityGraph entityGraph)

Adds a JPA 2.1 fetch-graph or load-graph hint to the given Query if running under JPA 2.1.

Parameters:

em - must not be null.

query - must not be null.

entityGraph - can be null.

See Also:

2.1 Specfication 3.7.4 - Use of Entity Graphs in find and query operations P.117

tryGetFetchGraph

public static javax.persistence.EntityGraph<?> tryGetFetchGraph(javax.persistence.EntityManager em,
                                                                JpaEntityGraph jpaEntityGraph)

Adds a JPA 2.1 fetch-graph or load-graph hint to the given Query if running under JPA 2.1.

Parameters:

em - must not be null.

jpaEntityGraph - must not be null.

Returns:

the EntityGraph described by the given entityGraph.

See Also:

2.1 Specfication 3.7.4 - Use of Entity Graphs in find and query operations P.117