2 Replies Latest reply on Jun 21, 2011 5:34 AM by osnetwork

Entity to Enum result in NPE

osnetwork Jun 21, 2011 3:45 AM

Hello everybody,

I have a datamodel with an Entity Tournmanet which had another entity TournamentKind associated as @ManyToOne.

I have decided instead of using a TournamentKind table, to use an Enum. So for this reason I have written the following class:

public enum TournamentKind {

          KIND1(1, "1..."),
          KIND2(100, "100..."),
          KIND3(101, "101..."),
          KIND4(102, "102...");

          private final int value;
          private final String description;

          TournamentKind(int id, String desc) {
                    this.value = id;
                    this.description = desc;
          }

          public static TournamentKind parse(int id) {
                    TournamentKind kind = null;

                    for (TournamentKind tournament : TournamentKind.values()) {
                              if (tournament.getValue() == id) {
                                        kind = tournament;
                                        break;
                              }
                    }
                    return kind;
          }

          public boolean isGroupTwo() {
                    if (KIND4.equals(this)) {
                              return true;
                    }
                    return false;
          }

          public boolean isGroupOne() {
                    if (KIND1.equals(this) || KIND2.equals(this)
                                        || KIND3.equals(this)) {
                              return true;
                    }
                    return false;
          }

          public int getValue() {
                    return value;
          }

          public String getDescription() {
                    return description;
          }

}

In the Database table Tournament I have a kind_id column with an integer value. The tournament class is mapped as follow:

@Column(name = "kind_id")
          private Integer kind;

          public void setKind(TournamentKind kind) {
                    this.kind = kind.getValue();
          }

          public TournamentKind getKind() {
                    return TournamentKind.parse(this.kind);
          }

When I start JBoss 6 I get this exception

01:57:25,124 INFO [TableMetadata] columns: [sequence_value, sequence_name]
01:57:25,124 INFO [TableMetadata] foreign keys: []
01:57:25,124 INFO [TableMetadata] indexes: []
01:57:25,124 INFO [SchemaUpdate] schema update complete
01:57:25,124 INFO [NamingHelper] JNDI InitialContext properties:{java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory, java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces}
01:57:25,522 ERROR [AbstractKernelController] Error installing to Start: name=persistence.unit:unitName=Test.ear/pn-test.jar#testEJB state=Create: java.lang.NullPointerException
          at org.hibernate.hql.ast.HqlSqlWalker.createFromJoinElement(HqlSqlWalker.java:396) [:3.6.5.Final]
          at org.hibernate.hql.antlr.HqlSqlBaseWalker.joinElement(HqlSqlBaseWalker.java:3671) [:3.6.5.Final]
          at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3452) [:3.6.5.Final]
          at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3325) [:3.6.5.Final]
          at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:733) [:3.6.5.Final]
          at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:584) [:3.6.5.Final]
          at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:301) [:3.6.5.Final]
          at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:244) [:3.6.5.Final]
          at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254) [:3.6.5.Final]
          at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185) [:3.6.5.Final]
          at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136) [:3.6.5.Final]
          at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101) [:3.6.5.Final]
          at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80) [:3.6.5.Final]
          at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:124) [:3.6.5.Final]
          at org.hibernate.impl.SessionFactoryImpl.checkNamedQueries(SessionFactoryImpl.java:549) [:3.6.5.Final]
          at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:413) [:3.6.5.Final]
          at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872) [:3.6.5.Final]
          at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:906) [:3.6.5.Final]
          at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:74) [:3.6.5.Final]
          at org.jboss.jpa.builder.DefaultCEMFBuilder.build(DefaultCEMFBuilder.java:47) [:3.0.0-alpha-5]
          at org.jboss.as.jpa.scanner.HackCEMFBuilder.build(HackCEMFBuilder.java:49) [:6.1.0-SNAPSHOT]
          at org.jboss.jpa.deployment.PersistenceUnitDeployment.start(PersistenceUnitDeployment.java:275) [:3.0.0-alpha-5]
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_26]
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_26]
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_26]
          at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_26]
          at org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:60) [jboss-reflect.jar:2.2.1.SP1]
          at org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:168) [jboss-reflect.jar:2.2.1.SP1]
          at org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66) [jboss-reflect.jar:2.2.1.SP1]
          at org.jboss.kernel.plugins.dependency.KernelControllerContextAction$JoinpointDispatchWrapper.execute(KernelControllerContextAction.java:257) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.kernel.plugins.dependency.ExecutionWrapper.execute(ExecutionWrapper.java:47) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchExecutionWrapper(KernelControllerContextAction.java:125) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchJoinPoint(KernelControllerContextAction.java:72) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.kernel.plugins.dependency.LifecycleAction.installActionInternal(LifecycleAction.java:202) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:54) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:42) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:379) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2044) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1083) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1322) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1246) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1139) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:894) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:641) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:182) [:2.2.1.GA]
          at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:58) [:2.2.1.GA]
          at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:63) [:2.2.1.GA]
          at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:55) [:2.2.1.GA]
          at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:179) [:2.2.1.GA]
          at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1832) [:2.2.1.GA]
          at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1550) [:2.2.1.GA]
          at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1571) [:2.2.1.GA]
          at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1603) [:2.2.1.GA]
          at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1491) [:2.2.1.GA]
          at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:379) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2044) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1083) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1322) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1246) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1139) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:939) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:654) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.deployers.plugins.deployers.DeployersImpl.change(DeployersImpl.java:1983) [:2.2.1.GA]
          at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:1076) [:2.2.1.GA]
          at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:679) [:2.2.1.GA]
          at org.jboss.system.server.profileservice.deployers.MainDeployerPlugin.process(MainDeployerPlugin.java:106) [:6.1.0-SNAPSHOT]
          at org.jboss.profileservice.dependency.ProfileControllerContext$DelegateDeployer.process(ProfileControllerContext.java:143) [:0.2.2]
          at org.jboss.profileservice.dependency.ProfileDeployAction.deploy(ProfileDeployAction.java:151) [:0.2.2]
          at org.jboss.profileservice.dependency.ProfileDeployAction.installActionInternal(ProfileDeployAction.java:94) [:0.2.2]
          at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:54) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:42) [jboss-kernel.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:379) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2044) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1083) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1322) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1246) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1139) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:939) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:654) [jboss-dependency.jar:2.2.0.SP1]
          at org.jboss.profileservice.dependency.ProfileActivationWrapper$BasicProfileActivation.start(ProfileActivationWrapper.java:190) [:0.2.2]
          at org.jboss.profileservice.dependency.ProfileActivationWrapper.start(ProfileActivationWrapper.java:87) [:0.2.2]
          at org.jboss.profileservice.dependency.ProfileActivationService.activateProfile(ProfileActivationService.java:215) [:0.2.2]
          at org.jboss.profileservice.dependency.ProfileActivationService.activate(ProfileActivationService.java:159) [:0.2.2]
          at org.jboss.profileservice.bootstrap.AbstractProfileServiceBootstrap.activate(AbstractProfileServiceBootstrap.java:112) [:0.2.2]
          at org.jboss.profileservice.resolver.BasicResolverFactory$ProfileResolverFacade.deploy(BasicResolverFactory.java:87) [:0.2.2]
          at org.jboss.profileservice.bootstrap.AbstractProfileServiceBootstrap.start(AbstractProfileServiceBootstrap.java:91) [:0.2.2]
          at org.jboss.system.server.profileservice.bootstrap.BasicProfileServiceBootstrap.start(BasicProfileServiceBootstrap.java:132) [:6.1.0-SNAPSHOT]
          at org.jboss.system.server.profileservice.bootstrap.BasicProfileServiceBootstrap.start(BasicProfileServiceBootstrap.java:56) [:6.1.0-SNAPSHOT]
          at org.jboss.bootstrap.impl.base.server.AbstractServer.startBootstraps(AbstractServer.java:827) [jboss-bootstrap-impl-base.jar:2.1.0-alpha-5]
          at org.jboss.bootstrap.impl.base.server.AbstractServer$StartServerTask.run(AbstractServer.java:417) [jboss-bootstrap-impl-base.jar:2.1.0-alpha-5]
          at java.lang.Thread.run(Thread.java:662) [:1.6.0_26]

What am I doing wrong?

Thanks in advance,

Luca

1. Re: Entity to Enum result in NPE

wdfink Jun 21, 2011 3:49 AM (in response to osnetwork)

First of all, if you use enums you should set @Enumerated.
Option is STRING or ORDINAL, I'm not sure whether this work with your implementation.

I suppose the NPE is related to the data type 'Integer' and you have null-values within the table.

Also you should use attachment for (long)stacktraces because the thread will become unreadable.
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2. Re: Entity to Enum result in NPE

osnetwork Jun 21, 2011 5:34 AM (in response to wdfink)

ok, sorry about the stacktrace, next time I'll make add an attachment.

However, I dont think the NPE is related to the database values, originally I had a primitive type of int and I have changed to Integer, and I'm still getting the error and in the database there are no entry with null value.
Also, STRING or ORDINAL are not an option. I have an existing database with an integer value and I dont want to change it to a varchar nor to ordinal. I want, instead to treat the value as an integer on the database side, but still being "seen" as an Enum on the code.

My approach, was something similar to the answer here:
http://stackoverflow.com/questions/3605655/control-sort-order-of-hibernate-enumtype-string-properties
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