public class Jpa21Utils extends Object
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. |
public static Map<String,Object> tryGetFetchGraphHints(javax.persistence.EntityManager em, JpaEntityGraph entityGraph)
Map
with hints for a JPA 2.1 fetch-graph or load-graph if running under JPA 2.1.em
- must not be nullquery
- must not be nullentityGraph
- can be nullMap
with the hints or an empty Map
if no hints were foundpublic static javax.persistence.EntityGraph<?> tryGetFetchGraph(javax.persistence.EntityManager em, JpaEntityGraph jpaEntityGraph)
Query
if running under JPA 2.1.em
- must not be null.jpaEntityGraph
- must not be null.EntityGraph
described by the given entityGraph
.2.1 Specfication 3.7.4 - Use of Entity Graphs in find and query operations P.117
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