Question

给出以下课程

@MappedSuperclass
public abstract class Base {

    protected int net;

    int getNet() { return net; }

    void setNet(int value) { net = value; }

    @Transient
    boolean isNet() { return true; }
}

我将isNet注释为@Transient来解决歧义，并告诉JPA使用get和set方法继续使用并忽略is。但我仍然得到这个错误：

ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 62) MSC000001: Failed to start service jboss.persistenceunit."DevCrowd.war#prod": org.jboss.msc.service.StartException in service jboss.persistenceunit."DevCrowd.war#prod": javax.persistence.PersistenceException: [PersistenceUnit: prod] Unable to build Hibernate SessionFactory
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:179)
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:121)
    at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:667)
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:193)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
    at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: prod] Unable to build Hibernate SessionFactory
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:954)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:882)
    at org.jboss.as.jpa.hibernate5.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44)
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:161)
    ... 7 more
Caused by: org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:123)
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:77)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:346)
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:879)
    ... 9 more
Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:91)
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:116)
    at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:388)
    at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:509)
    at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:124)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:96)
    ... 13 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:88)
    ... 22 more
Caused by: org.hibernate.MappingException: In trying to locate getter for property [net], Class [business.state.entity.Base] defined both a `get` [public int business.state.entity.Base.getNet()] and `is` [public boolean business.state.entity.Base.isNet()] variant
    at org.hibernate.internal.util.ReflectHelper.checkGetAndIsVariants(ReflectHelper.java:485)
    at org.hibernate.internal.util.ReflectHelper.verifyNoGetVariantExists(ReflectHelper.java:508)
    at org.hibernate.internal.util.ReflectHelper.getGetterOrNull(ReflectHelper.java:451)
    at org.hibernate.internal.util.ReflectHelper.findGetterMethod(ReflectHelper.java:392)
    at org.hibernate.property.access.internal.PropertyAccessBasicImpl.<init>(PropertyAccessBasicImpl.java:41)
    at org.hibernate.property.access.internal.PropertyAccessStrategyBasicImpl.buildPropertyAccess(PropertyAccessStrategyBasicImpl.java:27)
    at org.hibernate.mapping.Property.getGetter(Property.java:299)
    at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:270)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:147)
    at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:63)
    ... 27 more

其中

org.hibernate.MappingException：试图找到getter property [net]，Class Base定义了get和is变体

告诉我@Transient由于某种原因没有解决歧义。这是为什么？请忽略isNet方法是愚蠢的。这是一个很小的例子。

从评论中添加：

如果删除@Transient注释，我会收到错误

在...... Base上检测到不明确的持久属性方法;将一个标记为@Transient：[public int ... getNet（）]和[public boolean .... isNet（）]。

所以它要我使用这个注释

Answer 1

嗯，这是你的错误。

引起：org.hibernate.MappingException：试图找到吸气剂对于属性[net]，类[business.state.entity.Base]定义了a ＆＃39;让＆＃39; [public int business.state.entity.Base.getNet()]和＆＃39;是＆＃39; [public boolean business.state.entity.Base.isNet()]变体

我怀疑@Transient告诉JPA完全忽略该字段，但这并不能解决get和is之间的冲突。它没有告诉JPA忽略该方法。

我知道您要求我们忽略您对is的非标准使用，但我建议您一般不要做这样的事情。这会让其他开发人员感到困惑，显然也会导致JPA混淆。

Answer 2

该问题已在休眠5.2.11中修复

https://hibernate.atlassian.net/browse/HHH-11716

为什么＆＃34; org.hibernate.MappingException：在尝试定位属性的getter时，Class定义了get和is变体＆＃34;使用@Transient时出错？

2 个答案: