本文整理了Java中javax.persistence.metamodel.Metamodel.managedType()方法的一些代码示例，展示了Metamodel.managedType()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Metamodel.managedType()方法的具体详情如下：
包路径：javax.persistence.metamodel.Metamodel
类名称：Metamodel
方法名：managedType

Metamodel.managedType介绍

[英]Return the metamodel managed type representing the entity, mapped superclass, or embeddable class.
[中]

代码示例

代码示例来源：origin: spring-projects/spring-data-jpa

/**
   * @param value
   * @return {@literal true} if the given value is not {@literal null} and a mapped persistable entity otherwise
   *         {@literal false}
   */
  private boolean isIdentifierDerivationNecessary(@Nullable Object value) {
    if (value == null) {
      return false;
    }
    try {
      ManagedType<? extends Object> managedType = this.metamodel.managedType(ClassUtils.getUserClass(value));
      return managedType != null && managedType.getPersistenceType() == PersistenceType.ENTITY;
    } catch (IllegalArgumentException iae) {
      // no mapped type
      return false;
    }
  }
}

代码示例来源：origin: spring-projects/spring-data-jpa

/**
   * Returns the {@link Metamodel} aware of the given type.
   *
   * @param type must not be {@literal null}.
   * @return can be {@literal null}.
   */
  @Nullable
  private Metamodel getMetamodelFor(Class<?> type) {
    for (Metamodel model : metamodels) {
      try {
        model.managedType(type);
        return model;
      } catch (IllegalArgumentException o_O) {
        // Fall back to inspect *all* managed types manually as Metamodel.managedType(…) only
        // returns for entities, embeddables and managed supperclasses.
        for (ManagedType<?> managedType : model.getManagedTypes()) {
          if (type.equals(managedType.getJavaType())) {
            return model;
          }
        }
      }
    }
    return null;
  }
}

代码示例来源：origin: spring-projects/spring-data-jpa

/**
 * Creates a new {@link JpaMetamodelEntityInformation} for the given domain class and {@link Metamodel}.
 *
 * @param domainClass must not be {@literal null}.
 * @param metamodel must not be {@literal null}.
 */
public JpaMetamodelEntityInformation(Class<T> domainClass, Metamodel metamodel) {
  super(domainClass);
  Assert.notNull(metamodel, "Metamodel must not be null!");
  this.metamodel = metamodel;
  ManagedType<T> type = metamodel.managedType(domainClass);
  if (type == null) {
    throw new IllegalArgumentException("The given domain class can not be found in the given Metamodel!");
  }
  this.entityName = type instanceof EntityType ? ((EntityType<?>) type).getName() : null;
  if (!(type instanceof IdentifiableType)) {
    throw new IllegalArgumentException("The given domain class does not contain an id attribute!");
  }
  IdentifiableType<T> identifiableType = (IdentifiableType<T>) type;
  this.idMetadata = new IdMetadata<T>(identifiableType);
  this.versionAttribute = findVersionAttribute(identifiableType, metamodel);
}

代码示例来源：origin: spring-projects/spring-data-jpa

private String tryFindSingularIdAttributeNameOrUseFallback(Class<? extends Object> idPropertyValueType,
    String fallbackIdTypePropertyName) {
  ManagedType<? extends Object> idPropertyType = metamodel.managedType(idPropertyValueType);
  for (SingularAttribute<?, ?> sa : idPropertyType.getSingularAttributes()) {
    if (sa.isId()) {
      return sa.getName();
    }
  }
  return fallbackIdTypePropertyName;
}

代码示例来源：origin: spring-projects/spring-data-jpa

ManagedType<?> managedSuperType = metamodel.managedType(superType);

代码示例来源：origin: BroadleafCommerce/BroadleafCommerce

ManagedType mt = mm.managedType(clazz);
try {
  Attribute attr = mt.getAttribute(piece);

代码示例来源：origin: Blazebit/blaze-persistence

@Override
public <X> ManagedType<X> managedType(Class<X> cls) {
  return delegate.managedType(cls);
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

protected <T> Expression<T> buildExpressionForAs(Class<T> type) {
  managedType = metamodel.managedType(type);
  currentNode = currentNode.treat(type);
  return (Expression<T>)this;
}

代码示例来源：origin: org.fornax.cartridges/fornax-cartridges-sculptor-framework

/**
 *
 * @param path
 * @param type
 * @param entity
 * @return
 */
protected List<Predicate> preparePredicates(Object entity) {
  return preparePredicates(root, metaModel.managedType(getType()), entity);
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

public <X, T extends X> Path<T> treat(Path<X> path, Class<T> type) {
  //Handle all the paths that might get passed in.:
  PathImpl parentPath = (PathImpl)path;
  PathImpl newPath = (PathImpl)parentPath.clone();
  newPath.currentNode = newPath.currentNode.treat(type);
  newPath.pathParent = parentPath;
  newPath.javaType = type;
  newPath.modelArtifact = this.metamodel.managedType(type);
  return newPath;
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

public <X, T, V extends T> Join<X, V> treat(Join<X, T> join, Class<V> type) {
  JoinImpl parentJoin = (JoinImpl)join;
  JoinImpl joinImpl = new JoinImpl<X, V>(parentJoin, this.metamodel.managedType(type), this.metamodel, 
      type, parentJoin.currentNode.treat(type), parentJoin.getModel(), parentJoin.getJoinType());
  parentJoin.joins.add(joinImpl);
  joinImpl.isJoin = parentJoin.isJoin;
  parentJoin.isJoin = false;
  return joinImpl;
}

代码示例来源：origin: org.springframework.data/spring-data-jpa

private String tryFindSingularIdAttributeNameOrUseFallback(Class<? extends Object> idPropertyValueType,
    String fallbackIdTypePropertyName) {
  ManagedType<? extends Object> idPropertyType = metamodel.managedType(idPropertyValueType);
  for (SingularAttribute<?, ?> sa : idPropertyType.getSingularAttributes()) {
    if (sa.isId()) {
      return sa.getName();
    }
  }
  return fallbackIdTypePropertyName;
}

代码示例来源：origin: org.hibernate/com.springsource.org.hibernate.ejb

@SuppressWarnings({ "unchecked" })
public SingularAttributeJoin(
    CriteriaBuilderImpl criteriaBuilder,
    Class<X> javaType,
    PathSource<Z> pathSource, 
    SingularAttribute<? super Z, ?> joinAttribute,
    JoinType joinType) {
  super( criteriaBuilder, javaType, pathSource, joinAttribute, joinType );
  this.model = (Bindable<X>) (
      Attribute.PersistentAttributeType.EMBEDDED == joinAttribute.getPersistentAttributeType()
          ? joinAttribute
          : criteriaBuilder.getEntityManagerFactory().getMetamodel().managedType( javaType )
  );
}

代码示例来源：origin: org.infinispan/infinispan-cachestore-jpa

private SingularAttribute getEntityId(EntityManager em, Class clazz) {
 Metamodel meta = em.getMetamodel();
 IdentifiableType identifiableType = (IdentifiableType) meta.managedType(clazz);
 return identifiableType.getId(identifiableType.getIdType().getJavaType());
}

代码示例来源：origin: Blazebit/blaze-persistence

protected String getEntityIdName(Class<?> entityClass) {
  ManagedType<?> managedType = entityViewConfiguration.getCriteriaBuilder().getMetamodel().managedType(entityClass);
  if (JpaMetamodelUtils.isIdentifiable(managedType)) {
    return JpaMetamodelUtils.getSingleIdAttribute((IdentifiableType<?>) managedType).getName();
  } else {
    return null;
  }
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

/**
 * Correlates a join to a Map-valued association or element collection in
 * the enclosing query to a join object of the subquery and returns the
 * subquery join object.
 * 
 * @param parentMap
 *            join target of the containing query
 * @return subquery join
 */
public <X, K, V> MapJoin<X, K, V> correlate(MapJoin<X, K, V> parentCollection){
  this.correlatedJoins.add(parentCollection);
  return new MapJoinImpl(parentCollection.getParentPath(), metamodel.managedType(parentCollection.getModel().getBindableJavaType()), metamodel, parentCollection.getJavaType(), internalCorrelate((FromImpl) parentCollection), parentCollection.getModel(), parentCollection.getJoinType(), (FromImpl) parentCollection);
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

/**
 * Correlates a join to a Set-valued association or element collection in
 * the enclosing query to a join object of the subquery and returns the
 * subquery join object.
 * 
 * @param parentSet
 *            join target of the containing query
 * @return subquery join
 */
public <X, Y> SetJoin<X, Y> correlate(SetJoin<X, Y> parentCollection){
  this.correlatedJoins.add(parentCollection);
  return new SetJoinImpl(parentCollection.getParentPath(), metamodel.managedType(parentCollection.getModel().getBindableJavaType()), metamodel, parentCollection.getJavaType(), ((InternalSelection)parentCollection).getCurrentNode(), parentCollection.getModel(), parentCollection.getJoinType(), (FromImpl) parentCollection);
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

public <X, T, E extends T> ListJoin<X, E> treat(ListJoin<X, T> join, Class<E> type) {
  ListJoinImpl parentJoin = (ListJoinImpl)join;
  ListJoin joinImpl = null;
  if (join instanceof BasicListJoinImpl) {
    joinImpl = new BasicListJoinImpl<X, E>(parentJoin, this.metamodel, type, 
        parentJoin.currentNode.treat(type), parentJoin.getModel(), parentJoin.getJoinType()); 
  } else {
    joinImpl = new ListJoinImpl<X, E>((Path)join, this.metamodel.managedType(type), this.metamodel, 
        type, parentJoin.currentNode.treat(type), parentJoin.getModel(), parentJoin.getJoinType());
  }
  parentJoin.joins.add(joinImpl);
  ((FromImpl)joinImpl).isJoin = parentJoin.isJoin;
  parentJoin.isJoin = false;
  return joinImpl;
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

public <X, T, E extends T> SetJoin<X, E> treat(SetJoin<X, T> join, Class<E> type) {
  SetJoinImpl parentJoin = (SetJoinImpl)join;
  SetJoin joinImpl = null;
  if (join instanceof BasicSetJoinImpl) {
    joinImpl = new BasicSetJoinImpl<X, E>(parentJoin, this.metamodel, type, 
        parentJoin.currentNode.treat(type), parentJoin.getModel(), parentJoin.getJoinType()); 
  } else {
    joinImpl = new SetJoinImpl<X, E>((Path)join, this.metamodel.managedType(type), this.metamodel, 
        type, parentJoin.currentNode.treat(type), parentJoin.getModel(), parentJoin.getJoinType());
  }
  parentJoin.joins.add(joinImpl);
  ((FromImpl)joinImpl).isJoin = parentJoin.isJoin;
  parentJoin.isJoin = false;
  return joinImpl;
}

代码示例来源：origin: babyfish-ct/babyfish

@SuppressWarnings("unchecked")
protected Bindable<X> onGetModel() {
  SingularAttribute<? super Z, ?> attribute = this.getAttribute();
  if (Attribute.PersistentAttributeType.EMBEDDED == attribute.getPersistentAttributeType()) {
    return (Bindable<X>)attribute;
  }
  return (Bindable<X>)this.getCriteriaBuilder().getEntityManagerFactory().getMetamodel().managedType(this.getJavaType());
}