JPA：如何表达包含@ElementCollection列的唯一约束？

这是我的JPA实体类：

@Cacheable
@Entity
public class JpaItemSearchRequest implements ItemSearchRequest {

    @Id
    @GeneratedValue
    private long id;

    @Enumerated(EnumType.STRING)
    private SearchIndex searchIndex;

    private String browseNode;
    private String keywords;

    @Enumerated(EnumType.STRING)
    @ElementCollection
    private Set<ResponseGroup> responseGroups = new HashSet<ResponseGroup>();

    private int itemPage;

    @Enumerated(EnumType.STRING)
    private Locale locale;

    ... end of fields ...
}

SearchIndex ， ResponseGroup 和 Locale 是枚举 .

该类具有相当复杂的唯一约束： (searchIndex, browseNode, keywords, responseGroups, itemPage, locale) 的组合被认为是唯一的 .

所以我在类中添加了以下约束注释：

@Table(uniqueConstraints = { @UniqueConstraint(columnNames = { "searchIndex", "browseNode", "keywords", "responseGroups", "itemPage", "locale" }) })

当我尝试练习课程时，我得到以下异常：

org.hibernate.AnnotationException: Unable to create unique key constraint (searchIndex, browseNode, keywords, responseGroups, itemPage, locale) on table JpaItemSearchRequest: database column responseGroups not found. Make sure that you use the correct column name which depends on the naming strategy in use (it may not be the same as the property name in the entity, especially for relational types)
    at org.hibernate.cfg.Configuration.buildUniqueKeyFromColumnNames(Configuration.java:1584) ~[hibernate-core-4.1.7.Final.jar:4.1.7.Final]
    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1386) ~[hibernate-core-4.1.7.Final.jar:4.1.7.Final]
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1737) ~[hibernate-core-4.1.7.Final.jar:4.1.7.Final]
    at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:94) ~[hibernate-entitymanager-4.1.7.Final.jar:4.1.7.Final]
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:905) ~[hibernate-entitymanager-4.1.7.Final.jar:4.1.7.Final]
    ... 74 common frames omitted

（我使用Hibernate 4.1.7.Final作为JPA实现/服务提供者）

例外要点是： database column responseGroups not found.

如果我没有在幕后为我的单个实体类指定该约束，则Hibernate生成两个表：一个用于所有"simple"实体数据，另一个用于 Set<ResponseGroup> responseGroups 实体数据的表：

CREATE TABLE `jpaitemsearchrequest` (
    `id` BIGINT(20) NOT NULL AUTO_INCREMENT,
    `browseNode` VARCHAR(255) NULL DEFAULT NULL,
    `itemPage` INT(11) NOT NULL,
    `keywords` VARCHAR(255) NULL DEFAULT NULL,
    `locale` VARCHAR(255) NULL DEFAULT NULL,
    `searchIndex` VARCHAR(255) NULL DEFAULT NULL,
    PRIMARY KEY (`id`)
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB
AUTO_INCREMENT=3;

...

CREATE TABLE `jpaitemsearchrequest_responsegroups` (
    `JpaItemSearchRequest_id` BIGINT(20) NOT NULL,
    `responseGroups` VARCHAR(255) NULL DEFAULT NULL,
    INDEX `FKC217757B99AE0422` (`JpaItemSearchRequest_id`),
    CONSTRAINT `FKC217757B99AE0422` FOREIGN KEY (`JpaItemSearchRequest_id`) REFERENCES `jpaitemsearchrequest` (`id`)
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB;

我怎样才能正确表达我的约束？

编辑

这个问题曾经是这样的：
JPA: Unique constraint across a Set (...unique constraint on another table)

进一步思考我的问题，我相信它可以归结为以下问题：
JPA: How to express a unique constraint including an @ElementCollection column?