java - JPA 2 和 Hibernate 3.5.1 MEMBER OF 查询不起作用

Question

我正在尝试以下 JPQL，但它失败了:

Query query = em.createQuery("SELECT u FROM User u WHERE 'admin' MEMBER OF u.roles");
List users = query.query.getResultList();

我得到以下异常:

ERROR [main] PARSER.error(454) | <AST>:0:0: unexpected end of subtree
java.lang.IllegalArgumentException: org.hibernate.hql.ast.QuerySyntaxException: unexpected end of subtree [SELECT u FROM com.online.data.User u WHERE 'admin' MEMBER OF u.roles] ERROR [main] PARSER.error(454) | <AST>:0:0: expecting "from", found '<ASTNULL>'
...
...
Caused by: org.hibernate.hql.ast.QuerySyntaxException: unexpected end of subtree [SELECT u FROM com.online.data.User u WHERE 'admin' MEMBER OF u.roles]

我有 Spring 3.0.1.RELEASE、Hibernate 3.5.1-Final 和 maven 来粘合依赖项。

用户类:

@Entity
public class User {
  @Id
  @Column(name = "USER_ID")
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private long id;
  @Column(unique = true, nullable = false)
  private String username;

  private boolean enabled;

  @ElementCollection
  private Set<String> roles = new HashSet<String>();

...
}

Spring 配置:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
 xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
 xsi:schemaLocation="
       http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/tx/spring-context-3.0.xsd
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/aop 
       http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

 <!-- Reading annotation driven configuration -->
 <tx:annotation-driven transaction-manager="transactionManager" />

 <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
 <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
  <property name="driverClassName" value="${jdbc.driverClassName}" />
  <property name="url" value="${jdbc.url}" />
  <property name="username" value="${jdbc.username}" />
  <property name="password" value="${jdbc.password}" />
  <property name="maxActive" value="100" />
  <property name="maxWait" value="1000" />
  <property name="poolPreparedStatements" value="true" />
  <property name="defaultAutoCommit" value="true" />
 </bean>

 <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
  <property name="entityManagerFactory" ref="entityManagerFactory" />
  <property name="dataSource" ref="dataSource" />
 </bean>

 <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="jpaVendorAdapter">
   <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
    <property name="showSql" value="true" />
    <property name="databasePlatform" value="${hibernate.dialect}" />
   </bean>
  </property>
  <property name="loadTimeWeaver">
   <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
  </property>
  <property name="jpaProperties">
   <props>
    <prop key="hibernate.hbm2ddl.auto">update</prop>
    <prop key="hibernate.current_session_context_class">thread</prop>
    <prop key="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</prop>
    <prop key="hibernate.show_sql">true</prop>
    <prop key="hibernate.format_sql">false</prop>
    <prop key="hibernate.show_comments">true</prop>
   </props>
  </property>
  <property name="persistenceUnitName" value="punit" />
 </bean>

 <bean id="JpaTemplate" class="org.springframework.orm.jpa.JpaTemplate">
  <property name="entityManagerFactory" ref="entityManagerFactory" />
 </bean>



</beans>

持久性.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence">

 <persistence-unit name="punit" transaction-type="RESOURCE_LOCAL" />

</persistence>

pom.xml maven 依赖项。

  <dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate</artifactId>
   <version>${hibernate.version}</version>
   <type>pom</type>
  </dependency>
  <dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-core</artifactId>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-annotations</artifactId>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-entitymanager</artifactId>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupId>commons-dbcp</groupId>
   <artifactId>commons-dbcp</artifactId>
   <version>1.2.2</version>
   <type>jar</type>
  </dependency>
  <dependency>
   <groupId>org.springframework.security</groupId>
   <artifactId>spring-security-web</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework.security</groupId>
   <artifactId>spring-security-config</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework.security</groupId>
   <artifactId>spring-security-taglibs</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>org.springframework.security</groupId>
   <artifactId>spring-security-acl</artifactId>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupId>javax.annotation</groupId>
   <artifactId>jsr250-api</artifactId>
   <version>1.0</version>
  </dependency>
 <properties>
  <!-- Application settings -->
  <spring.version>3.0.1.RELEASE</spring.version>
  <hibernate.version>3.5.1-Final</hibernate.version>

我正在运行一个单元测试来检查配置，我能够运行其他 JPQL 查询，唯一我无法运行的是 IS EMPTY, MEMBER OF 条件。

完整的单元测试如下:

测试集成

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations =  { "/spring/dataLayer.xml"})
@Transactional
@TransactionConfiguration
public class TestUserDaoImplIntegration {
  @PersistenceContext
  private EntityManager em;

  @Test
  public void shouldTest() throws Exception {
    try {
//WORKS
Query query = em.createQuery("SELECT u FROM User u WHERE 'admin' in elements(u.roles)"); 
List users = query.query.getResultList();
    } catch (Exception e) {
      e.printStackTrace();
      throw e;
    }
    try {
//DOES NOT WORK
Query query = em.createQuery("SELECT u FROM User u WHERE 'admin' MEMBER OF u.roles"); 
List users = query.query.getResultList();
    } catch (Exception e) {
      e.printStackTrace();
      throw e;
    }
  }
}

Answer 1

我认为您的查询非常好。作为记录，这是 JPA 2.0 规范中关于 MEMBER OF 运算符的内容:

4.6.13 Collection Member Expressions

The syntax for the use of the comparison operator MEMBER OF in an collection_member_expression is as follows:

   collection_member_expression ::=
            entity_or_value_expression [NOT] MEMBER [OF] collection_valued_path_expression
   entity_or_value_expression ::=
            single_valued_object_path_expression |
            state_field_path_expression |
            simple_entity_or_value_expression
   simple_entity_or_value_expression ::=
            identification_variable |
            input_parameter |
            literal

This expression tests whether the designated value is a member of the collection specified by the collection-valued path expression.

Expressions that evaluate to embeddable types are not supported in collection member expressions. Support for use of embeddables in collection member expressions may be added in a future release of this specification.

If the collection valued path expression designates an empty collection, the value of the MEMBER OF expression is FALSE and the value of the NOT MEMBER OF expression is TRUE. Otherwise, if the value of the collection_valued_path_expression or entity_or_value_expression in the collection member expression is NULL or unknown, the value of the collection member expression is unknown.

Example:

SELECT p
FROM Person p
WHERE 'Joe' MEMBER OF p.nicknames

因此，因为我在您的查询中看不到任何错误，所以我已经使用 EclipseLink¹ 测试了您的代码，并且以下代码片段正常工作:

Query query = em.createQuery("SELECT u FROM User u WHERE 'admin' MEMBER OF u.roles");
List list = query.getResultList();

但 Hibernate EntityManager 3.5.1-Final 确实失败了。这听起来像是一个错误，欢迎随时提出 a Jira issue .

¹ 为了以防万一，我使用了以下 Maven 配置文件(针对 JPA 提供程序):

  <profile>
    <id>eclipselink</id>
    <repositories>
      <repository>
        <id>eclipselink</id>
        <url>http://www.eclipse.org/downloads/download.php?r=1&amp;nf=1&amp;file=/rt/eclipselink/maven.repo/</url>
      </repository>
    </repositories>
    <dependencies>
      <!-- See http://wiki.eclipse.org/EclipseLink/Maven -->
      <dependency>
        <groupId>org.eclipse.persistence</groupId>
        <artifactId>eclipselink</artifactId>
        <version>2.0.0</version>
      </dependency>
      <!-- optional - only needed if you are using JPA outside of a Java EE container-->
      <dependency>
        <groupId>org.eclipse.persistence</groupId>
        <artifactId>javax.persistence</artifactId>
        <version>2.0.0</version>
        <scope>provided</scope>
      </dependency>              
    </dependencies>
  </profile>

这是我的persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence
    xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
    version="2.0">

  <persistence-unit name="TestPu" transaction-type="RESOURCE_LOCAL">    
    <class>com.stackoverflow.q2688144.User</class>    
    <properties>
      <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
      <property name="javax.persistence.jdbc.url" value="jdbc:derby:testdb;create=true"/>    
      <property name="eclipselink.target-database" value="DERBY"/>
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
    </properties>
  </persistence-unit>
</persistence>

更新: 在 HHH-5209 中报告