java.lang.Object

org.hibernate.graph.EntityGraphs

public final class EntityGraphs extends Object

A collection of EntityGraph utilities.

API Note:: These operations are things which are arguably missing from JPA.

Constructor Summary

Constructors

Constructor

Description

EntityGraphs()
Method Summary

Modifier and Type

Method

Description

<S> Subgraph<S>

addTreatedSubgraph(Graph<? super S> graph, Class<S> subtype)

Allows a treated subgraph to ve created for a Subgraph, since the JPA-standard operation EntityGraph.addTreatedSubgraph(Class) is declared by EntityGraph.

static boolean

areEqual(AttributeNode<?> a, AttributeNode<?> b)

Compares two entity graph attribute node and returns true if they are equal, ignoring subgraph attribute order.

static <T> boolean

areEqual(EntityGraph<T> a, EntityGraph<T> b)

Compares two entity graphs and returns true if they are equal, ignoring attribute order.

static boolean

areEqual(Subgraph a, Subgraph b)

Compares two entity subgraphs and returns true if they are equal, ignoring attribute order.

static boolean

areEqual(Map<Class,Subgraph> a, Map<Class,Subgraph> b)

Compares two entity subgraph maps and returns true if they are equal, ignoring order.

static <T> EntityGraph<T>

createGraph(EntityType<T> rootType)

Create a new entity graph rooted at the given entity, without needing a reference to the session or session factory.

static EntityGraph<Map<String,?>>

createGraphForDynamicEntity(EntityType<?> rootType)

Create a new entity graph rooted at the given dynamic entity, without needing a reference to the session or session factory.

static List

executeList(Query query, EntityGraph<?> graph)

Deprecated.
Since it is not type safe and returns a raw type

static List

executeList(Query query, EntityGraph<?> graph, String semanticJpaHintName)

Deprecated.
Since it is not type safe, returns a raw type, and accepts a string

static List

executeList(Query query, EntityGraph<?> graph, GraphSemantic semantic)

Deprecated.
Since it is not type safe and returns a raw type

static <R> List<R>

executeList(TypedQuery<R> query, EntityGraph<R> graph)

Deprecated.
Use setFetchGraph(TypedQuery, EntityGraph) instead

static <R> List<R>

executeList(TypedQuery<R> query, EntityGraph<R> graph, String semanticJpaHintName)

Deprecated.
Since it accepts a string instead of GraphSemantic

static <R> List<R>

executeList(TypedQuery<R> query, EntityGraph<R> graph, GraphSemantic semantic)

Deprecated.
Use setGraph(TypedQuery, EntityGraph, GraphSemantic) instead

static <T> EntityGraph<T>

merge(EntityManager entityManager, Class<T> root, Graph<T>... graphs)

Merges multiple entity graphs into a single graph that specifies the fetching/loading of all attributes the input graphs specify.

static <T> EntityGraph<T>

merge(EntityManager entityManager, Class<T> root, List<? extends Graph<T>> graphs)

Merges multiple entity graphs into a single graph that specifies the fetching/loading of all attributes the input graphs specify.

static <T> EntityGraph<T>

merge(EntityManager entityManager, Class<T> root, Stream<? extends Graph<T>> graphs)

Merges multiple entity graphs into a single graph that specifies the fetching/loading of all attributes the input graphs specify.

static <R> void

setFetchGraph(TypedQuery<R> query, EntityGraph<R> graph)

Convenience method to apply the given fetch graph to the given query without the need for a cast when working with JPA API.

static <R> void

setGraph(TypedQuery<R> query, EntityGraph<R> graph, GraphSemantic semantic)

Convenience method to apply the given graph to the given query without the need for a cast when working with JPA API.

static <R> void

setLoadGraph(TypedQuery<R> query, EntityGraph<R> graph)

Convenience method to apply the given load graph to the given query without the need for a cast when working with JPA API.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- EntityGraphs
  
  public EntityGraphs()
Method Details
- createGraph
  
  public static <T> EntityGraph<T> createGraph(EntityType<T> rootType)
  
  Create a new entity graph rooted at the given entity, without needing a reference to the session or session factory.
  
  Parameters:
  
  rootType - The EntityType representing the root entity of the graph
  
  Returns:
  
  a new mutable EntityGraph
  
  Since:
  
  7.0
- createGraphForDynamicEntity
  
  public static EntityGraph<Map<String,?>> createGraphForDynamicEntity(EntityType<?> rootType)
  
  Create a new entity graph rooted at the given dynamic entity, without needing a reference to the session or session factory.
  
  Parameters:
  
  rootType - The EntityType representing the root entity of the graph, which must be a dynamic entity
  
  Returns:
  
  a new mutable EntityGraph
  
  Since:
  
  7.0
- merge
  
  @SafeVarargs public static <T> EntityGraph<T> merge(EntityManager entityManager, Class<T> root, Graph<T>... graphs)
  
  Merges multiple entity graphs into a single graph that specifies the fetching/loading of all attributes the input graphs specify.
  
  Type Parameters:
  
  T - Root entity type of the query and graph.
  
  Parameters:
  
  entityManager - EntityManager to use to create the new merged graph.
  
  root - Root type of the entity for which the graph is being merged.
  
  graphs - Graphs to merge.
  
  Returns:
  
  The merged graph.
- merge
  
  public static <T> EntityGraph<T> merge(EntityManager entityManager, Class<T> root, List<? extends Graph<T>> graphs)
  
  Merges multiple entity graphs into a single graph that specifies the fetching/loading of all attributes the input graphs specify.
  
  Type Parameters:
  
  T - Root entity type of the query and graph.
  
  Parameters:
  
  entityManager - EntityManager to use to create the new merged graph.
  
  root - Root type of the entity for which the graph is being merged.
  
  graphs - Graphs to merge.
  
  Returns:
  
  The merged graph.
  
  Since:
  
  7.0
- merge
  
  public static <T> EntityGraph<T> merge(EntityManager entityManager, Class<T> root, Stream<? extends Graph<T>> graphs)
  
  Merges multiple entity graphs into a single graph that specifies the fetching/loading of all attributes the input graphs specify.
  
  Type Parameters:
  
  T - Root entity type of the query and graph.
  
  Parameters:
  
  entityManager - EntityManager to use to create the new merged graph.
  
  root - Root type of the entity for which the graph is being merged.
  
  graphs - Graphs to merge.
  
  Returns:
  
  The merged graph.
  
  Since:
  
  7.0
- setGraph
  
  public static <R> void setGraph(TypedQuery<R> query, EntityGraph<R> graph, GraphSemantic semantic)
  
  Convenience method to apply the given graph to the given query without the need for a cast when working with JPA API.
  Parameters:
  
  query - The JPA TypedQuery
  
  graph - The JPA EntityGraph to apply
  
  semantic - The semantic to use when applying the graph
  
  Since:
  
  7.0
  
  See Also:
  
  SelectionQuery.setEntityGraph(EntityGraph, GraphSemantic)
- setLoadGraph
  
  public static <R> void setLoadGraph(TypedQuery<R> query, EntityGraph<R> graph)
  
  Convenience method to apply the given load graph to the given query without the need for a cast when working with JPA API.
  
  Parameters:
  
  query - The JPA TypedQuery
  
  graph - The JPA EntityGraph to apply
  
  Since:
  
  7.0
- setFetchGraph
  
  public static <R> void setFetchGraph(TypedQuery<R> query, EntityGraph<R> graph)
  
  Convenience method to apply the given fetch graph to the given query without the need for a cast when working with JPA API.
  
  Parameters:
  
  query - The JPA TypedQuery
  
  graph - The JPA EntityGraph to apply
  
  Since:
  
  7.0
- addTreatedSubgraph
  
  public <S> Subgraph<S> addTreatedSubgraph(Graph<? super S> graph, Class<S> subtype)
  
  Allows a treated subgraph to ve created for a Subgraph, since the JPA-standard operation EntityGraph.addTreatedSubgraph(Class) is declared by EntityGraph.
  
  Parameters:
  
  graph - any root graph or subgraph
  
  subtype - the treated (narrowed) type
  
  Since:
  
  7.0
- executeList
  
  @Deprecated(since="7.0") public static List executeList(Query query, EntityGraph<?> graph, GraphSemantic semantic)
  
  Deprecated.
  Since it is not type safe and returns a raw type
  
  Convenience method for executing the query, applying the given EntityGraph using the specified semantic
  
  Parameters:
  
  query - The JPA Query
  
  graph - The graph to apply
  
  semantic - The semantic to use when applying the graph
- executeList
  
  @Deprecated(since="7.0") public static <R> List<R> executeList(TypedQuery<R> query, EntityGraph<R> graph, GraphSemantic semantic)
  
  Deprecated.
  Use setGraph(TypedQuery, EntityGraph, GraphSemantic) instead
  
  Form of executeList(Query, EntityGraph, GraphSemantic) accepting a TypedQuery.
  
  Parameters:
  
  query - The JPA Query
  
  graph - The graph to apply
  
  semantic - The semantic to use when applying the graph
  
  API Note:
  
  This signature assumes that the Query's return is an entity and that the graph applies to that entity's type. JPA does not necessarily require that, but it is by far the most common usage.
- executeList
  
  @Deprecated(since="7.0") public static List executeList(Query query, EntityGraph<?> graph, String semanticJpaHintName)
  
  Deprecated.
  Since it is not type safe, returns a raw type, and accepts a string
  
  Convenience method for executing the query, applying the given EntityGraph using the named semantic using JPA's "hint name". See GraphSemantic.fromHintName(java.lang.String).
  
  Parameters:
  
  query - The JPA Query
  
  graph - The graph to apply
  
  semanticJpaHintName - See GraphSemantic.fromHintName(java.lang.String)
  
  Returns:
  
  The result list
- executeList
  
  @Deprecated(since="7.0") public static <R> List<R> executeList(TypedQuery<R> query, EntityGraph<R> graph, String semanticJpaHintName)
  
  Deprecated.
  Since it accepts a string instead of GraphSemantic
  
  Form of executeList(Query, EntityGraph, String) accepting a TypedQuery.
  
  Parameters:
  
  query - The JPA Query
  
  graph - The graph to apply
  
  semanticJpaHintName - See GraphSemantic.fromHintName(java.lang.String)
  
  API Note:
  
  This signature assumes that the Query's return is an entity and that the graph applies to that entity's type. JPA does not necessarily require that, but it is by far the most common usage.
- executeList
  
  @Deprecated(since="7.0") public static List executeList(Query query, EntityGraph<?> graph)
  
  Deprecated.
  Since it is not type safe and returns a raw type
  
  Convenience method for executing the query using the given EntityGraph.
  
  Parameters:
  
  query - The JPA Query
  
  graph - The graph to apply
  
  API Note:
  
  Operates on the assumption that the "default" semantic for an entity graph applied to a query is GraphSemantic.FETCH. This is simply knowledge from JPA EG discussions, nothing that is specifically mentioned or discussed in the spec.
- executeList
  
  @Deprecated(since="7.0") public static <R> List<R> executeList(TypedQuery<R> query, EntityGraph<R> graph)
  
  Deprecated.
  Use setFetchGraph(TypedQuery, EntityGraph) instead
  
  Form of executeList(Query, EntityGraph, String) accepting a TypedQuery.
  
  Parameters:
  
  query - The JPA Query
  
  graph - The graph to apply
  
  API Note:
  
  This signature assumes that the Query's return is an entity and that the graph applies to that entity's type. JPA does not necessarily require that, but it is by far the most common usage.
- areEqual
  
  public static <T> boolean areEqual(EntityGraph<T> a, EntityGraph<T> b)
  
  Compares two entity graphs and returns true if they are equal, ignoring attribute order.
  
  Type Parameters:
  
  T - Root entity type of BOTH graphs.
  
  Parameters:
  
  a - Graph to compare.
  
  b - Graph to compare.
- areEqual
  
  public static boolean areEqual(AttributeNode<?> a, AttributeNode<?> b)
  
  Compares two entity graph attribute node and returns true if they are equal, ignoring subgraph attribute order.
- areEqual
  
  public static boolean areEqual(Map<Class,Subgraph> a, Map<Class,Subgraph> b)
  
  Compares two entity subgraph maps and returns true if they are equal, ignoring order.
- areEqual
  
  public static boolean areEqual(Subgraph a, Subgraph b)
  
  Compares two entity subgraphs and returns true if they are equal, ignoring attribute order.

Class EntityGraphs

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Details

EntityGraphs

Method Details

createGraph

createGraphForDynamicEntity

merge

merge

merge

setGraph

setLoadGraph

setFetchGraph

addTreatedSubgraph

executeList

executeList

executeList

executeList

executeList

executeList

areEqual

areEqual

areEqual

areEqual