Mit JPA Entity-Vererbung mit IdClass Composite-Primärschlüssel beteiligt Objektreferenzen

Question

Ich versuche IdClass Composite Primärschlüssel geben Sie die folgenden Szenarien zu verwenden:

• Primärschlüssel beinhalten Objektverweis (Entitätsobjekten)
• Entity Objekt in Primärschlüssel sind Fremdschlüssel zu anderen Einheiten (oder hat OneToOne ManyToOne mapping)
• Die Klassen Entität Verbund Ids Subklassen haben mit

Her e werden die Entitätsklassen betroffen:

Contract.java

@Entity 
@IdClass(ContractPK.class) 
@Table(name = "CONTRACT") 
public abstract class Contract implements Serializable { 
    private FiscalArrangement fiscalArrangement; 
    private CrudeType crudeType; 

    public Contract() {} 

    public Contract(FiscalArrangement fiscalArrangement, CrudeType crudeType) { 
     this.fiscalArrangement = fiscalArrangement; 
     this.crudeType = crudeType; 
    } 

    @Id 
    @ManyToOne 
    public FiscalArrangement getFiscalArrangement() { 
      return fiscalArrangement; 
    } 

    public void setFiscalArrangement(FiscalArrangement fiscalArrangement) { 
     this.fiscalArrangement = fiscalArrangement; 
    } 

    @Id 
    @ManyToOne 
    public CrudeType getCrudeType() { 
     return crudeType; 
    } 

    public void setCrudeType(CrudeType crudeType) { 
     this.crudeType = crudeType; 
    } 
    //equals and hasCode 
} 

ContractPK.java

public class ContractPK implements Serializable { 
    private FiscalArrangement fiscalArrangement; 
    private CrudeType crudeType; 

    public ContractPK() {} 

    public ContractPK(FiscalArrangement fiscalArrangement, CrudeType crudeType) { 
     this.fiscalArrangement = fiscalArrangement; 
     this.crudeType = crudeType; 
    } 
    //getters and setters 
} 

RegularContract.java

@Entity 
@DiscriminatorValue("REG") 
public class RegularContract extends Contract{} 

AlternativeFundingContract.java

@Entity 
@DiscriminatorValue("AF") 
public abstract class AlternativeFundingContract extends Contract{ 
    private Double sharedOilRatio; 
    private Double terminalPeriod; 
    private Double terminalSharedOil; 
    //getters and setters 
} 

CarryContract.java

@Entity 
@DiscriminatorValue("CA") 
public class CarryContract extends AlternativeFundingContract {} 

ModifiedCarryContract.java

@Entity 
@DiscriminatorValue("MCA") 
public class ModifiedCarryContract extends AlternativeFundingContract{} 

Forecast.java

@Entity 
@IdClass(ForecastPK.class) 
@Table(name = "FORECAST") 
@Inheritance(strategy = InheritanceType.SINGLE_TABLE) 
@DiscriminatorColumn(name = "FTYPE") 
public abstract class Forecast implements Serializable { 
    private Integer periodYear; 
    private Integer periodMonth; 
    private Contract contract; 
    //other non-primary properties  

    public Forecast() {} 

    @Id 
    public Integer getPeriodYear() { 
     return periodYear; 
    } 

    public void setPeriodYear(Integer periodYear) { 
     this.periodYear = periodYear; 
    } 

    @Id 
    public Integer getPeriodMonth() { 
     return periodMonth; 
    } 

    public void setPeriodMonth(Integer periodMonth) { 
     this.periodMonth = periodMonth; 
    } 

    @Id 
    @ManyToOne 
    public Contract getContract() { 
     return contract; 
    } 

    public void setContract(Contract contract) { 
     this.contract = contract; 
    } 

    //other getters and setters 
} 

ForecastPK.java

public class ForecastPK implements Serializable { 
    private Integer periodYear; 
    private Integer periodMonth; 
    private Contract contract; 

    //getters and setters 
} 

RegularForecast.java

@Entity 
@DiscriminatorValue("REG") 
public class RegularForecast extends Forecast {} 

AlternativeFundingForecast.java

Entity 
@DiscriminatorValue("AF") 
public abstract class AlternativeFundingForecast extends Forecast { 
    //properties 
} 

CarryForecast.java

@Entity 
@DiscriminatorValue("CA") 
public class CarryForecast extends AlternativeFundingForecast{} 

ModifiedCarryForecast.java

@Entity 
@DiscriminatorValue("MCA") 
public class ModifiedCarryForecast extends AlternativeFundingForecast{} 

Controller-Klasse: JvForecastController.java

@Named(value = "jvProdController") 
@SessionScoped 
public class JvForecastController implements Serializable { 
    @Inject 
    private JvForecastServices forecastBean;  
    private Forecast currentProduction; 
    private Integer periodYear; 
    private Integer periodMonth; 
    private FiscalArrangement currentFiscalArrangement; 
    private Contract currentContract; 

    public JvForecastServices getForecastBean(){ 
     return forecastBean; 
    } 

    public void currentContractChanged() throws Exception { 
     if (currentContract instanceof RegularContract) { 
      currentProduction = new RegularForecast(); 
     } else if (currentContract instanceof CarryContract) {    
      currentProduction = new CarryForecast(); 
     } else if (currentContract instanceof ModifiedCarryContract) { 
      currentProduction = new ModifiedCarryForecast(); 
     } else { 
      throw new Exception("Undefined contract type");    
     } 

     //set primary key fields 
     currentProduction.setPeriodYear(periodYear); 
     currentProduction.setPeriodMonth(periodMonth); 
     currentProduction.setContract(currentContract); 
    } 

    public void productionVolumeChanged() { 
     getForecastBean().enrich(currentProduction);   
    } 

} 

Bean Implementierungsklasse: JvForecastServicesImpl.java

@Dependent 
public abstract class JvForecastServicesImpl<T extends Forecast> extends CommonServicesImpl<T> implements JvForecastServices<T>, Serializable { 
    public JvForecastServicesImpl(Class<T> entityClass) { 
     super(entityClass); 
    } 

    @Override 
    public T computeOpeningStock(T forecast) { 
     Forecast prod = getPreviousMonthProduction(forecast); 
     //some code 
     return forecast; 
    } 

    @Override 
    public T getPreviousMonthProduction(T forecast) { 
     int month = forecast.getPeriodMonth(); 
     int year = forecast.getPeriodYear(); 
     Contract cs = forecast.getContract(); 
     Contract contract = null; 

     if (cs instanceof RegularContract) { 
      contract = new RegularContract(cs.getFiscalArrangement(), cs.getCrudeType()); 
     } else if (cs instanceof CarryContract) { 
      contract = new CarryContract(cs.getFiscalArrangement(), cs.getCrudeType()); 
     } else if (contract instanceof ModifiedCarryContract) { 
      contract = new ModifiedCarryContract(cs.getFiscalArrangement(), cs.getCrudeType()); 
     } 

     FiscalPeriod prevFp = getPreviousFiscalPeriod(year, month); 

     T f = find(new ForecastPK(prevFp.getYear(), prevFp.getMonth(), contract)); 

     return f; 
    } 

} 

CommonServicesImpl.java

public abstract class CommonServicesImpl<T> extends AbstractCrudServicesImpl<T> implements CommonServices<T> {} 

Umsetzung der find() Methode in AbstractCrudServicesImpl.

Java

public abstract class AbstractCrudServicesImpl<T> implements AbstractCrudServices<T> { 
protected final Class<T> entityClass; 
    public AbstractCrudServicesImpl(Class<T> entityClass) { 
     this.entityClass = entityClass; 
    } 

    protected abstract EntityManager getEntityManager(); 

    //some CRUD methods 

    @Override 
    public T find(Object id) { 
     return getEntityManager().find(entityClass, id); 
    } 
} 

wenn die folgende Zeile des Codes in JvForecastServicesImpl Klasse ausführt:

T f = find(new ForecastPK(prevFp.getYear(), prevFp.getMonth(), contract)); 

ich die Fehlermeldung:

10:24:59,492 INFO [org.hibernate.event.internal.DefaultLoadEventListener] (default task-42) HHH000327: Error performing load command : org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.nnpcgroup.cosm.entity.contract.Contract 10:24:59,497 ERROR [org.jboss.as.ejb3.invocation] (default task-42) WFLYEJB0034: EJB Invocation failed on component RegularForecastBean for method public abstract java.lang.Object com.nnpcgroup.cosm.ejb.CommonServices.enrich(java.lang.Object): javax.ejb.EJBException: java.lang.IllegalStateException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.nnpcgroup.cosm.entity.contract.Contract at org.jboss.as.ejb3.tx.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:187) at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:277) at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:327) at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:100) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:66) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:54) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:64) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356) at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:636) at org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:61) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356) at org.jboss.invocation.PrivilegedWithCombinerInterceptor.processInvocation(PrivilegedWithCombinerInterceptor.java:80) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:195) at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:185) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:73) at com.nnpcgroup.cosm.ejb.forecast.jv.JvRegularForecastServices$$$view23.enrich(Unknown Source) at com.nnpcgroup.cosm.controller.JvForecastController.productionVolumeChanged(JvForecastController.java:233) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.sun.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:181) at com.sun.el.parser.AstValue.invoke(AstValue.java:289) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) at com.sun.faces.facelets.tag.jsf.core.AjaxBehaviorListenerImpl.processAjaxBehavior(AjaxHandler.java:459) at javax.faces.event.AjaxBehaviorEvent.processListener(AjaxBehaviorEvent.java:113) at javax.faces.component.behavior.BehaviorBase.broadcast(BehaviorBase.java:106) at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:805) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) at io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:51) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) at io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:56) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.IllegalStateException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.nnpcgroup.cosm.entity.contract.Contract at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1689) at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1619) at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1106) at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1033) at org.jboss.as.jpa.container.AbstractEntityManager.find(AbstractEntityManager.java:213) at com.nnpcgroup.cosm.ejb.impl.AbstractCrudServicesImpl.find(AbstractCrudServicesImpl.java:44) at com.nnpcgroup.cosm.ejb.forecast.jv.impl.JvForecastServicesImpl.getPreviousMonthProduction(JvForecastServicesImpl.java:204) at com.nnpcgroup.cosm.ejb.forecast.jv.impl.JvForecastServicesImpl.computeOpeningStock(JvForecastServicesImpl.java:47) at com.nnpcgroup.cosm.ejb.forecast.jv.impl.JvForecastServicesImpl.enrich(JvForecastServicesImpl.java:112) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437) at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82) at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93) at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437) at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:64) at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:52) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275) ... 86 more

Answer 1

JPA nennt diese Art von Verbundprimärschlüssel eines „abgeleitete Identität".

Sie müssen Ihre IdClass es ändern. ContractPK soll wie folgt aussehen (vorausgesetzt FiscalArrangement und CrudeType einfache Primärschlüssel haben):

public class ContractPK implements Serializable { 
    private Integer fiscalArrangement; 
    private Integer crudeType; 
    ... 
} 

Beachten Sie die Attributnamen die Entity Übereinstimmen ‚s @Id Attributnamen, aber die Typen müssen die Typen des Ziels Entity s entsprechen‘ Primärschlüssel.

Wenn die Ziel Entity s @IdClass es verwenden, ContractPK sollte wie folgt aussehen:

public class ContractPK implements Serializable { 
    private FiscalArrangementPK fiscalArrangement; 
    private CrudeTypePK crudeType; 
    ... 
} 

Beachten Sie die Attributtypen IdClass es jetzt sind.

Ebenso ForecastPK sollte wie folgt aussehen:

public class ForecastPK implements Serializable { 
    private Integer periodYear; 
    private Integer periodMonth; 
    private Integer contract; 
    ... 
} 

oder dies:

public class ForecastPK implements Serializable { 
    private Integer periodYear; 
    private Integer periodMonth; 
    private ContractPK contract; 
    ... 
} 

Abgeleitet Identitäten in der JPA 2.1-Spezifikation diskutiert werden, Abschnitt 2.4.1.