我有自定义enum值要保留在DB中。为此，我实施了StringValuedEnum，StringValuedEnumType和StingValuedEnumReflect以及我的enum实施StringValuedEnum。
当我使用手动管理的JPA运行我的代码时，一切正常，我的枚举值保存在DB中。但是一旦我使用容器管理的JPA（Wildfly 8.2）运行应用程序，我在刷新实体管理器时会收到以下错误：
Caused by: java.lang.AbstractMethodError: yyy.xxx.util.StringValuedEnumType.nullSafeSet(Ljava/sql/PreparedStatement;Ljava/lang/Object;ILorg/hibernate/engine/spi/SessionImplementor;)V
at org.hibernate.type.CustomType.nullSafeSet(CustomType.java:158) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2843) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3121) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3581) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:104) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:463) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:349) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:350) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:56) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1222) [hibernate-core-4.3.7.Final.jar:4.3.7.Final]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:1335) [hibernate-entitymanager-4.3.7.Final.jar:4.3.7.Final]
at org.jboss.as.jpa.container.AbstractEntityManager.flush(AbstractEntityManager.java:457) [wildfly-jpa-8.2.1.Final.jar:8.2.1.Final]
at zzz.ejb.facades.EntityManagerFacade.createObject(EntityManagerFacade.java:2024) [zzz-ejb.jar:]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_66]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_66]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_66]
at java.lang.reflect.Method.invoke(Method.java:497) [rt.jar:1.8.0_66]
at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:407)
at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82) [wildfly-weld-8.2.1.Final.jar:8.2.1.Final]
at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93) [wildfly-weld-8.2.1.Final.jar:8.2.1.Final]
at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) [wildfly-ejb3-8.2.1.Final.jar:8.2.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47) [wildfly-jpa-8.2.1.Final.jar:8.2.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:407)
at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:46) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83) [wildfly-weld-8.2.1.Final.jar:8.2.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45) [wildfly-ee-8.2.1.Final.jar:8.2.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.NonPooledEJBComponentInstanceAssociatingInterceptor.processInvocation(NonPooledEJBComponentInstanceAssociatingInterceptor.java:59) [wildfly-ejb3-8.2.1.Final.jar:8.2.1.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInCallerTx(CMTTxInterceptor.java:251) [wildfly-ejb3-8.2.1.Final.jar:8.2.1.Final]
看起来问题出现在池中（堆栈跟踪中显示了非池化的EJB组件）。
奇怪的是我无法调试它来理解问题，调试器不会停在方法内的任何断点上，而不是System.out.println()的工作。
问题：
答案 0 :(得分：2)
UserType方法的签名nullSafeSet和nullSafeGet已从Hibernate 3更改为hibernate 4.您需要做的是在自定义用户类型中更新这些方法。
从中改变：
public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session) throws HibernateException, SQLException
到此：
public void nullSafeSet(PreparedStatement st, Object value, int index, SharedSessionContractImplementor session) throws HibernateException, SQLException
如您所见，“SessionImplementor”参数的类型已更改。
答案 1 :(得分：0)
我将解决方案放在这里，以便其他人也可以看到甚至使用，但是如果能提供确切的答案，将不胜感激。
我仅通过用@Entity
@Table(name = "TABLE_NAME")
public class EntityClass {
// columns
@Transient
private EnumClass enumObj;
@Column(name = "ENUM_COL_NAME")
private String enumColField;
// ......................
@PostLoad
void fillTransient() {
enumObj = EnumClass.fromValue(enumColField);
}
@PrePersist
@PreUpdate
void fillPersistent() {
if (enumObj != null) {
enumColField = enumObj.getField();
}
}
}
注释我的实体列就解决了我的问题，以便保留枚举名称。对于我的枚举没关系。但是如果枚举有一些字段并且您想要保留字段的值，那么可以在您的实体类中执行以下操作：
pubspec.yaml这很完美，即使您的枚举有多个字段并且您想要将它们分别保存在数据库中，您也可以根据需要提供任意多的列，填充这些列并以提供的方式进行检索。