Java JPA与@heritance（strategy=InheritanceType.JOINED）实体的一对多关联_Java_Jpa_One To Many

Java JPA与@heritance（strategy=InheritanceType.JOINED）实体的一对多关联
java jpa
Java JPA与@heritance（strategy=InheritanceType.JOINED）实体的一对多关联,java,jpa,one-to-many,Java,Jpa,One To Many,大家好我正在尝试将一对多关联映射到一个实体，该实体是带有@heritance（strategy=heritancetype.JOINED）的mappes 这是两个子类： @Entity @Table(name="S_MC_CC_CCCLIENTI") @DiscriminatorValue("1 ") public class ContoCorrente extends Rapporto { private static final long serialVersionUID = -3
大家好
我正在尝试将一对多关联映射到一个实体，该实体是带有
@heritance（strategy=heritancetype.JOINED）的mappes
这是两个子类：
@Entity
@Table(name="S_MC_CC_CCCLIENTI")
@DiscriminatorValue("1 ")
public class ContoCorrente extends Rapporto {
    private static final long serialVersionUID = -3380622649760983262L;

    @Column(name = "DESC_DIVISA")
    private String divisa;

@Entity
@Table(name = "S_MC_CC_RAPPORTI")
@DiscriminatorValue("6 ")
public class NumeroPortafoglioEstero extends Rapporto {

    private static final long serialVersionUID = 6869743707936663970L;

    /**
     * @param filiale
     * @param categoria
     * @param conto
     */
    public NumeroPortafoglioEstero(Filiale filiale, String categoria, String conto) {
        super(filiale, categoria, conto);
    }

这是一个例外：
Local Exception Stack: 
Exception [EclipseLink-43] (Eclipse Persistence Services - 2.1.2.v20101206-r8635): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: Missing class for indicator field value [1] of type [class java.lang.String].
Descriptor: RelationalDescriptor(it.alten.intesasanpaolo.contratto.domain.core.rapporto.Rapporto --> [DatabaseTable(S_MC_CC_RAPPORTI)])
    at org.eclipse.persistence.exceptions.DescriptorException.missingClassForIndicatorFieldValue(DescriptorException.java:921)
    at org.eclipse.persistence.descriptors.InheritancePolicy.classFromValue(InheritancePolicy.java:355)
    at org.eclipse.persistence.descriptors.InheritancePolicy.classFromRow(InheritancePolicy.java:342)
    at org.eclipse.persistence.descriptors.InheritancePolicy.selectAllRowUsingDefaultMultipleTableSubclassRead(InheritancePolicy.java:1303)
    at org.eclipse.persistence.descriptors.InheritancePolicy.selectAllRowUsingMultipleTableSubclassRead(InheritancePolicy.java:1402)
    at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectAllRows(ExpressionQueryMechanism.java:2493)
    at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:407)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1076)
    at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:740)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1036)
    at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:380)
    at org.eclipse.persistence.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:2392)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1291)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1273)
    at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:96)
    at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:86)
    at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
    at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:160)
    at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:220)
    at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
    at org.eclipse.persistence.indirection.IndirectList.buildDelegate(IndirectList.java:237)
    at org.eclipse.persistence.indirection.IndirectList.getDelegate(IndirectList.java:398)
    at org.eclipse.persistence.indirection.IndirectList.toArray(IndirectList.java:741)
    at it.alten.intesasanpaolo.contratto.domain.core.anagrafica.Contratto.toString(Contratto.java:262)
    at java.lang.String.valueOf(String.java:2827)
    at java.io.PrintStream.println(PrintStream.java:771)
    at it.alten.intesasanpaolo.contratto.dao.core.anagrafica.TestContrattoDaoJpaImpl.testGetItemByID(TestContrattoDaoJpaImpl.java:99)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

问候
Massimo
继承层次结构中的每个实体必须是一个用@entity
注释并具有@DiscriminatorValue
的类。根据EclipseLink文档（），当在继承层次结构中找不到具有特定鉴别器值的类时，会发生此异常
请注意，错误消息将鉴别器值显示为1
，而在@DiscriminatorValue
中，它被指定为“1”
。我认为这个额外的空间会导致一个问题-从数据库加载值时，这个空间会被剥离，或者数据库中的旧值具有没有空格的鉴别器。
我对@DiscriminatorValue进行了更改：现在，超类定义：@DiscriminatorColumn（name=“COD_TIPORAPPORTO”，discriminatorType=discriminatorType.STRING，长度=2）


以及亲属子类：

@DiscriminatorValue（“1”）


现在我不再收到任何异常，但为获取数据而生成的查询不起作用：下面是生成内容的示例：
[EL Fine]: 2011-01-14 19:29:53.312--ServerSession(5230193)--Connection(5612344)--Thread(Thread[main,5,main])--SELECT t0.COD_RAPPORTO, t0.COD_TIPORAPPORTO, t0.COD_MATRICOLAGESTORE, t0.FLAG_RENDICONTAZIONE, t0.COD_CATEGORIA, t0.COD_STATORAPPORTO, t0.FLAG_SB_ATTIVO, t0.COD_GESTORE, t0.TIMESTAMP_AGGIORNAMENTO, t0.DESC_ATTRIBUTO, t0.NUM_RAPPORTO, t0.COD_NSG, t0.COD_ABI, t0.DEN_FILIALE, t1.COD_RAPPORTO, t1.COD_CIN, t1.DESC_DIVISA, t1.COD_CAB, t1.COD_IBAN, t1.COD_CHD, t1.COD_NAZIONE, t1.COD_SERVIZIO FROM S_MC_CC_RAPPORTI t0, S_MC_CC_CONTRATTIRAPPORTI t2, S_MC_CC_CCCLIENTI t1 WHERE (((t2.COD_MULTICHANNELID = ?) AND (t0.COD_RAPPORTO = t2.COD_RAPPORTO)) AND ((t1.COD_RAPPORTO = t0.COD_RAPPORTO) AND (t0.COD_TIPORAPPORTO = ?)))

绑定=>[01025640171576493，1]
实际上，通过Toad发布的查询工作正常。似乎加载所有数据的查询正在工作，但实际上我看不到关联值
向所有人问好……好的，我成功了。问题是与抽象的、没有鉴别器值的超类的关联。想象一下人-->动物，其中动物是由猫和狗扩展的抽象超类。猫和狗有辨别力，但动物没有。现在我想从一个人联想到另一个动物，并拥有所有的猫和狗。我需要如下内容：targetEntity={Cat.class，Dog.class}，但不受支持。有什么想法吗？友善的regards@m.ugues然后提供更多信息-显示您的子类，以及stacktrace的确切异常。您使用哪个JPA提供程序？
@Entity
@Table(name="S_MC_CC_CCCLIENTI")
@DiscriminatorValue("1 ")
public class ContoCorrente extends Rapporto {
    private static final long serialVersionUID = -3380622649760983262L;

    @Column(name = "DESC_DIVISA")
    private String divisa;

@Entity
@Table(name = "S_MC_CC_RAPPORTI")
@DiscriminatorValue("6 ")
public class NumeroPortafoglioEstero extends Rapporto {

    private static final long serialVersionUID = 6869743707936663970L;

    /**
     * @param filiale
     * @param categoria
     * @param conto
     */
    public NumeroPortafoglioEstero(Filiale filiale, String categoria, String conto) {
        super(filiale, categoria, conto);
    }

Local Exception Stack: 
Exception [EclipseLink-43] (Eclipse Persistence Services - 2.1.2.v20101206-r8635): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: Missing class for indicator field value [1] of type [class java.lang.String].
Descriptor: RelationalDescriptor(it.alten.intesasanpaolo.contratto.domain.core.rapporto.Rapporto --> [DatabaseTable(S_MC_CC_RAPPORTI)])
    at org.eclipse.persistence.exceptions.DescriptorException.missingClassForIndicatorFieldValue(DescriptorException.java:921)
    at org.eclipse.persistence.descriptors.InheritancePolicy.classFromValue(InheritancePolicy.java:355)
    at org.eclipse.persistence.descriptors.InheritancePolicy.classFromRow(InheritancePolicy.java:342)
    at org.eclipse.persistence.descriptors.InheritancePolicy.selectAllRowUsingDefaultMultipleTableSubclassRead(InheritancePolicy.java:1303)
    at org.eclipse.persistence.descriptors.InheritancePolicy.selectAllRowUsingMultipleTableSubclassRead(InheritancePolicy.java:1402)
    at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectAllRows(ExpressionQueryMechanism.java:2493)
    at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:407)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1076)
    at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:740)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1036)
    at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:380)
    at org.eclipse.persistence.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:2392)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1291)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1273)
    at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:96)
    at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:86)
    at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
    at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:160)
    at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:220)
    at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
    at org.eclipse.persistence.indirection.IndirectList.buildDelegate(IndirectList.java:237)
    at org.eclipse.persistence.indirection.IndirectList.getDelegate(IndirectList.java:398)
    at org.eclipse.persistence.indirection.IndirectList.toArray(IndirectList.java:741)
    at it.alten.intesasanpaolo.contratto.domain.core.anagrafica.Contratto.toString(Contratto.java:262)
    at java.lang.String.valueOf(String.java:2827)
    at java.io.PrintStream.println(PrintStream.java:771)
    at it.alten.intesasanpaolo.contratto.dao.core.anagrafica.TestContrattoDaoJpaImpl.testGetItemByID(TestContrattoDaoJpaImpl.java:99)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

[EL Fine]: 2011-01-14 19:29:53.312--ServerSession(5230193)--Connection(5612344)--Thread(Thread[main,5,main])--SELECT t0.COD_RAPPORTO, t0.COD_TIPORAPPORTO, t0.COD_MATRICOLAGESTORE, t0.FLAG_RENDICONTAZIONE, t0.COD_CATEGORIA, t0.COD_STATORAPPORTO, t0.FLAG_SB_ATTIVO, t0.COD_GESTORE, t0.TIMESTAMP_AGGIORNAMENTO, t0.DESC_ATTRIBUTO, t0.NUM_RAPPORTO, t0.COD_NSG, t0.COD_ABI, t0.DEN_FILIALE, t1.COD_RAPPORTO, t1.COD_CIN, t1.DESC_DIVISA, t1.COD_CAB, t1.COD_IBAN, t1.COD_CHD, t1.COD_NAZIONE, t1.COD_SERVIZIO FROM S_MC_CC_RAPPORTI t0, S_MC_CC_CONTRATTIRAPPORTI t2, S_MC_CC_CCCLIENTI t1 WHERE (((t2.COD_MULTICHANNELID = ?) AND (t0.COD_RAPPORTO = t2.COD_RAPPORTO)) AND ((t1.COD_RAPPORTO = t0.COD_RAPPORTO) AND (t0.COD_TIPORAPPORTO = ?)))