Hibernate异常Null值被分配给原始类型设置器的属性

Question

Hibernate 3.6.9有一个令人沮丧的问题。MS SQL Server 2008。请注意异常和奇数列索引引用。

HQL查询本身：

Select r from DataStoreReference r join fetch r.container c where r.hash=:hash and r.state=0

堆栈跟踪：

2012-05-16 00:01:22,184 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - The value supplied cannot be converted to BIGINT.  
2012-05-16 00:01:22,186 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - The value supplied cannot be converted to BIGINT.  
2012-05-16 00:01:22,188 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - Invalid column index 14.  
2012-05-16 00:01:22,190 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - The value supplied cannot be converted to BIGINT.  
2012-05-16 00:01:22,193 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - The value supplied cannot be converted to BIGINT.  
2012-05-16 00:01:22,194 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - Invalid column index 14.  
2012-05-16 00:01:22,194 [BackgroundDeletionThread] ERROR com.flipper.utils.ServerErrorHandlerStrategy - reportError: Db :: com.flipper.datastore.workers.BackgroundDeletionThread.executeWork:87 :: EXCEPTION : com.flipper.datastore.exceptions.DBStoreException: Null value was assigned to a property of primitive type setter of com.flipper.datastore.model.DataStoreReference.usage com.flipper.datastore.exceptions.DBStoreException: Null value was assigned to a property of primitive type setter of com.flipper.datastore.model.DataStoreReference.usage  
    at com.flipper.datastore.impl.hib.HibernateDBStore.getAllReferences(HibernateDBStore.java:301)
    at    com.flipper.datastore.workers.BackgroundDeletionThread.processEntry(BackgroundDeletionThread.java:165)
    at com.flipper.datastore.workers.BackgroundDeletionThread.processSet(BackgroundDeletionThread.java:138)
    at com.flipper.datastore.workers.BackgroundDeletionThread.executeWork(BackgroundDeletionThread.java:84)
    at com.flipper.datastore.workers.BackgroundDeletionThread.run(BackgroundDeletionThread.java:60)
Caused by: org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of com.flipper.datastore.model.DataStoreReference.usage
    at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:109)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:583)
    at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:229)
    at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3847)
    at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:152)
    at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:982)
    at org.hibernate.loader.Loader.doQuery(Loader.java:857)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)
    at org.hibernate.loader.Loader.doList(Loader.java:2542)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276)
    at org.hibernate.loader.Loader.list(Loader.java:2271)
    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:459)
    at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:365)
    at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
    at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1268)
    at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
    at com.flipper.message.dao.DataStoreDao.getAllReferencesByHash(DataStoreDao.java:136)
    at com.flipper.datastore.impl.hib.HibernateDBStore.getAllReferences(HibernateDBStore.java:298)
    ... 4 more
Caused by: java.lang.IllegalArgumentException
    at sun.reflect.GeneratedMethodAccessor556.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:66)
    ... 21 more

如果我现在不明白这个逻辑

a） DataStoreReference的每一次实例化之后不久都会出现系统的setUsage。currentTimeMillis）b）该项在映射中被标记为非空（见下文）c）导出的表仅在f_外部列中显示空值。“用法”列有非常合理的长数字。

POJO：

数据存储参考

private long id;


private String hash;    
private long date;  
private long sze;   
private long usage; 

private int state;  
private String external;
private DataStoreContainer container; 

其次是通用的未修改getter/setters。

映射文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.flippr.datastore.model">
  <class name="DataStoreReference" table="t_dsref">
    <id name="id">
      <column name="ds_reference_id"/>
      <generator class="native"/>
    </id>
    <property name="hash" not-null="true" column="f_hash" lazy="false" index="idx_hash_dsr" type="string" length="128" />
    <property name="state" not-null="true" column="f_state" lazy="false" index="idx_hash_dsr,idx_size_dsr,idx_usage_dsr" type="integer"/>
    <!--  hibernate hates the name size -->
    <property name="sze" not-null="true" column="f_size" lazy="false" index="idx_size_dsr" type="long"/>
    <property name="date" not-null="true" column="f_date" lazy="false" type="long"/>    
    <property name="usage" not-null="true" column="f_usage" lazy="false" index="idx_usage_dsr" type="long"/>
    <property name="external" not-null="false" column="f_ext" lazy="false" type="string" length="160" />

    <many-to-one name="container" class="com.flipper.datastore.model.DataStoreContainer" 
     column="entity_id" foreign-key="fk_ds_container_id_dsr"  not-found="ignore" not-null="true"/>
   </class>
</hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.flipper.datastore.model">
  <class name="DataStoreContainer" table="t_dscnt">
    <id name="id">
      <column name="ds_container_id"/>
      <generator class="native"/>
    </id>
    <property name="containerType" column="f_type" index="idx_containerType_dsc" lazy="false" type="integer"/>
    <property name="fileCount" column="f_fc" lazy="false" type="long"/>
    <property name="deletedCount" column="f_dc" lazy="false" type="long"/>
    <property name="path" column="f_path" length="255" lazy="false"  type="string"/>
    <set cascade="save-update,delete,delete-orphan,all-delete-orphan" inverse="true" name="documents">
      <key column="entity_id" />
      <one-to-many class="com.flipper.datastore.model.DataStoreReference"/>
    </set>
  </class>
</hibernate-mapping>

Answer 1

事实证明，这是一个带有增强版Hibernate 3.6 MS SQL方言的bug。如果扩展SQLServer2005或SQLServer2008方言，就会出现此问题。使用较旧的SQLServer方言（这与Hibernate 3.3x附带的语言非常相似），您不会这么做。可能与引入的分页支持有关。叹气

Answer 2

在Hibernate中，当您对某些列使用基本类型，但在DB中字段为空时，就会发生这种错误。解决：

解决方案一：使用包装类（整数表示int…）解决方案二：为列定义默认值。

Answer 3

错误信息很清楚：在至少一行中，列f_usage有一个空值。这个空值不能放入像long这样的原始类型中，因为原始类型不能表示null。

当数据库中已经有空值时，属性子句中的no-null属性无效。no-null属性仅用于dmd生成。但是数据库表的f_usage列t_dsref可能允许空值（请检查sql中的desct_dsref）。

解决方案：交换长与长：

private Long usage; 

例如，当使用该值时，必须处理null条件

if (usage != null) {
  return usage.longValue();
else
  return -1;

（您在hibernate中使用getter和setter进行访问，所以这个小代码不应该在getter中，因为在数据库中，一个null值在更新后应该继续为null，但您可以在其他地方使用的第二个getter中执行，或者为hibernate执行字段访问。）

我的一般建议：如果列在数据库中标记为Not NULL，则应仅将原始数据类型用于Hibernate属性。