Hibernate中的JPA根get不使用IdClass属性

我正在尝试对具有IdClass的实体执行多重选择。我无法获取作为ID一部分映射的列。很明显，我无法获取，因为标记为@Ids的列都不是hibernate正在创建的EntityType中属性的一部分，它们是IdAttributes映射的一部分

这段代码在openJPA中运行良好，但出于各种原因，我决定迁移到hibernate

失败的代码：

CriteriaBuilder queryBuilder = getEntityManager().getCriteriaBuilder();
CriteriaQuery<Tuple> query = queryBuilder.createTupleQuery();
Root<ProductSearchFilter> productSearchFilterRoot = query.from(ProductSearchFilter.class);
query.multiselect(productSearchFilterRoot.get("productId").alias("productId"),
            productSearchFilterRoot.get("category").alias("category"),
            productSearchFilterRoot.get("name").alias("name"),
            productSearchFilterRoot.get("fdaStatus").alias("fdaStatus"));
    query.distinct(true);

我的映射设置：

@Table(name = "PRODUCT_SEARCH_FILTER")
@Entity()
@IdClass(ProductSearchFilterPK.class)
public class ProductSearchFilter {

private String source;
private String productId;
private String name;
private String category;
private String searchColumn;
private String fdaStatus;

@Column(name = "SOURCE", length = 11)
public String getSource() {
    return source;
}

public void setSource(String source) {
    this.source = source;
}

@Column(name = "PRODUCT_ID", length = 46, insertable = false, updatable = false)
@Id
public String getProductId() {
    return productId;
}

public void setProductId(String productId) {
    this.productId = productId;
}

@Column(name = "NAME", length = 510)
public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

@Column(name = "CATEGORY", length = 10)
public String getCategory() {
    return category;
}

public void setCategory(String category) {
    this.category = category;
}


@Column(name = "SEARCH_COLUMN", length = 1088, insertable = false, updatable = false)
@Id
public String getSearchColumn() {
    return searchColumn;
}

public void setSearchColumn(String searchColumn) {
    this.searchColumn = searchColumn;
}

@Column(name = "FDA_STATUS", insertable = false, updatable = false)
@Id
public String getFdaStatus() {
    return fdaStatus;
}

public void setFdaStatus(String fdaStatus) {
    this.fdaStatus = fdaStatus;
}
}



public class ProductSearchFilterPK implements Serializable {
private String productId;
private String searchColumn;
private String fdaStatus;

public String getFdaStatus() {
    return fdaStatus;
}

public void setFdaStatus(String fdaStatus) {
    this.fdaStatus = fdaStatus;
}

public String getProductId() {
    return productId;
}

public void setProductId(String productId) {
    this.productId = productId;
}

public String getSearchColumn() {
    return searchColumn;
}

public void setSearchColumn(String searchColumn) {
    this.searchColumn = searchColumn;
}
}

---

有一种变通方法，即使用规范元模型

不幸的是，我们从productSearchFilterRoot获得的整个模型对我们帮助不大，因为它 只给我们一个集合的视图。所以，我们不能从那个里通过属性名立即查询IdClass的属性。 但不管怎么说，它们都在那里：

//following will contain three attributes that are part of id.
Set<SingularAttribute<? super ProductSearchFilter, ?>> s = model.getIdClassAttributes();

//following will contain three attributes that are part of id.
Set<SingularAttribute<? super ProductSearchFilter, ?>> s = model.getIdClassAttributes();

@StaticMetamodel(ProductSearchFilter.class)
public abstract class ProductSearchFilter_ {
    public static volatile SingularAttribute<ProductSearchFilter, String> category;
    public static volatile SingularAttribute<ProductSearchFilter, String> fdaStatus;
    public static volatile SingularAttribute<ProductSearchFilter, String> source;
    public static volatile SingularAttribute<ProductSearchFilter, String> name;
    public static volatile SingularAttribute<ProductSearchFilter, String> searchColumn;
    public static volatile SingularAttribute<ProductSearchFilter, String> productId;
}

CriteriaBuilder queryBuilder = getEntityManager().getCriteriaBuilder();
CriteriaQuery<Tuple> query = queryBuilder.createTupleQuery();
Root<ProductSearchFilter> productSearchFilterRoot = query.from(ProductSearchFilter.class);
query.multiselect(
    productSearchFilterRoot.get(ProductSearchFilter_.productId).alias("productId"),
    productSearchFilterRoot.get(ProductSearchFilter_.category).alias("category"),
    productSearchFilterRoot.get(ProductSearchFilter_.name).alias("name"),
    productSearchFilterRoot.get(ProductSearchFilter_.fdaStatus).alias("fdaStatus"));
query.distinct(true);

productSearchFilterRoot.get("name").alias("name"),