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 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.
static Map<String,Object>	tryGetFetchGraphHints(javax.persistence.EntityManager em, JpaEntityGraph entityGraph) Returns a Map with hints for a JPA 2.1 fetch-graph or load-graph 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

tryGetFetchGraphHints

public static Map<String,Object> tryGetFetchGraphHints(javax.persistence.EntityManager em,
                                                       JpaEntityGraph entityGraph)

Returns a Map with hints for a JPA 2.1 fetch-graph or load-graph if running under JPA 2.1.

Parameters:

em - must not be null

query - must not be null

entityGraph - can be null

Returns:

a Map with the hints or an empty Map if no hints were found

Since:

1.8

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