-->
These old forums are deprecated now and set to read-only. We are waiting for you on our new forums!
More modern, Discourse-based and with GitHub/Google/Twitter authentication built-in.

All times are UTC - 5 hours [ DST ]



Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 7 posts ] 
Author Message
 Post subject: NullPointerException in buildInheritanceSates()
PostPosted: Mon Aug 08, 2005 1:18 pm 
Beginner
Beginner

Joined: Sun Jun 13, 2004 9:49 pm
Posts: 38
Need help with Hibernate? Read this first:
http://www.hibernate.org/ForumMailingli ... AskForHelp

Hibernate version: 3.1 beta1
Hibernate Annotations version: 3.1 beta4
EJB Presistence: Public Review

Full stack trace of any exception that occurs:
Code:
2005-08-08 18:08:812 [main] DEBUG com.dolby.pics.core.db.model.impl.BaseDAO [beginTransaction() :43] - com.dolby.pics.core.db.model.impl.BaseDAO trying to start a transaction
2005-08-08 18:08:873 [main] INFO  org.hibernate.cfg.Environment [<clinit>() :464] - Hibernate 3.1 beta 1
2005-08-08 18:08:883 [main] INFO  org.hibernate.cfg.Environment [<clinit>() :477] - hibernate.properties not found
2005-08-08 18:08:891 [main] INFO  org.hibernate.cfg.Environment [<clinit>() :510] - using CGLIB reflection optimizer
2005-08-08 18:08:893 [main] INFO  org.hibernate.cfg.Environment [<clinit>() :540] - using JDK 1.4 java.sql.Timestamp handling
2005-08-08 18:08:319 [main] INFO  org.hibernate.cfg.Configuration [configure() :1148] - configuring from resource: /hibernate-test.cfg.xml
2005-08-08 18:08:361 [main] INFO  org.hibernate.cfg.Configuration [getConfigurationInputStream() :1116] - Configuration resource: /hibernate-test.cfg.xml
2005-08-08 18:08:727 [main] DEBUG org.hibernate.util.DTDEntityResolver [resolveEntity() :42] - trying to locate http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd in classpath under org/hibernate/
2005-08-08 18:08:730 [main] DEBUG org.hibernate.util.DTDEntityResolver [resolveEntity() :53] - found http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd in classpath
2005-08-08 18:08:887 [main] DEBUG org.hibernate.cfg.Configuration [addProperties() :1100] - hibernate.connection.username=zpics
2005-08-08 18:08:889 [main] DEBUG org.hibernate.cfg.Configuration [addProperties() :1100] - hibernate.connection.password=rrr@pf0p
2005-08-08 18:08:890 [main] DEBUG org.hibernate.cfg.Configuration [addProperties() :1100] - hibernate.dialect=org.hibernate.dialect.DerbyDialect
2005-08-08 18:08:891 [main] DEBUG org.hibernate.cfg.Configuration [addProperties() :1100] - hibernate.connection.url=jdbc:derby:target/zpics;create=true
2005-08-08 18:08:892 [main] DEBUG org.hibernate.cfg.Configuration [addProperties() :1100] - hibernate.connection.driver_class=org.apache.derby.jdbc.EmbeddedDriver
2005-08-08 18:08:893 [main] DEBUG org.hibernate.cfg.Configuration [addProperties() :1100] - hibernate.show_sql=true
2005-08-08 18:08:894 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@1c5d9084 [Attribute: name class value "com.dolby.pics.core.db.model.util.EntityObject"]
2005-08-08 18:08:944 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@203fa5ac [Attribute: name class value "com.dolby.pics.core.db.model.util.EntityWithGeneratedId"]
2005-08-08 18:08:946 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@979dce4 [Attribute: name class value "com.dolby.pics.core.db.model.util.EntityWithAssignedId"]
2005-08-08 18:08:947 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@1f950198 [Attribute: name class value "com.dolby.pics.core.db.model.impl.BusinessUnit"]
2005-08-08 18:08:948 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@6f9bb25a [Attribute: name class value "com.dolby.pics.core.db.model.impl.MasterProduct"]
2005-08-08 18:08:949 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@56da6bf4 [Attribute: name class value "com.dolby.pics.core.db.model.impl.MasterDolbyProduct"]
2005-08-08 18:08:950 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@1de58cb8 [Attribute: name class value "com.dolby.pics.core.db.model.impl.MasterKitProduct"]
2005-08-08 18:08:951 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@4cb9e45a [Attribute: name class value "com.dolby.pics.core.db.model.impl.MasterNonDolbyProduct"]
2005-08-08 18:08:971 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@254e8cee [Attribute: name class value "com.dolby.pics.core.db.model.impl.Country"]
2005-08-08 18:08:972 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@1ebcda2d [Attribute: name class value "com.dolby.pics.core.db.model.impl.SubSystem"]
2005-08-08 18:08:974 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@6ee0a386 [Attribute: name class value "com.dolby.pics.core.db.model.impl.InstalledSubSystem"]
2005-08-08 18:08:976 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@671ff436 [Attribute: name class value "com.dolby.pics.core.db.model.impl.Address"]
2005-08-08 18:08:978 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@651dba45 [Attribute: name class value "com.dolby.pics.core.db.model.impl.MapicsAddress"]
2005-08-08 18:08:980 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@2af081 [Attribute: name class value "com.dolby.pics.core.db.model.impl.MaximizerAddress"]
2005-08-08 18:08:981 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@7ec5495e [Attribute: name class value "com.dolby.pics.core.db.model.impl.PeoplesoftAddress"]
2005-08-08 18:08:983 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@4f9a32e0 [Attribute: name class value "com.dolby.pics.core.db.model.impl.Product"]
2005-08-08 18:08:985 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@716925b0 [Attribute: name class value "com.dolby.pics.core.db.model.impl.EntityType"]
2005-08-08 18:08:986 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@26914f6a [Attribute: name class value "com.dolby.pics.core.db.model.impl.InventoryItem"]
2005-08-08 18:08:988 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@42787d6a [Attribute: name class value "com.dolby.pics.core.db.model.impl.customfield.AbstractCFType"]
2005-08-08 18:08:990 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@5f326484 [Attribute: name class value "com.dolby.pics.core.db.model.impl.customfield.AbstractMultiFieldCFType"]
2005-08-08 18:08:991 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [parseMappingElement() :319] - null<-org.dom4j.tree.DefaultAttribute@5c1428ea [Attribute: name class value "com.dolby.pics.core.db.model.impl.customfield.MultiSelectCFType"]
2005-08-08 18:08:993 [main] DEBUG org.hibernate.cfg.Configuration [parseListener() :1340] - Encountered configured listener : pre-insert=com.dolby.pics.core.db.model.util.CorePreInsertEventListener
2005-08-08 18:08:994 [main] DEBUG org.hibernate.cfg.Configuration [parseListener() :1340] - Encountered configured listener : pre-update=com.dolby.pics.core.db.model.util.CorePreUpdateEventListener
2005-08-08 18:08:996 [main] INFO  org.hibernate.cfg.Configuration [doConfigure() :1259] - Configured SessionFactory: null
2005-08-08 18:08:999 [main] DEBUG org.hibernate.cfg.Configuration [doConfigure() :1260] - properties: {hibernate.connection.password=rrr@pf0p, java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition, sun.boot.library.path=/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/amd64, java.vm.version=1.5.0_04-b05, hibernate.connection.username=zpics, java.vm.vendor=Sun Microsystems Inc., java.vendor.url=http://java.sun.com/, path.separator=:, java.vm.name=Java HotSpot(TM) 64-Bit Server VM, file.encoding.pkg=sun.io, user.country=GB, sun.os.patch.level=unknown, java.vm.specification.name=Java Virtual Machine Specification, user.dir=/home/djb/workspaces/eclipse-SDK-3.1/workspace/pics-core-db-model, java.runtime.version=1.5.0_04-b05, java.awt.graphicsenv=sun.awt.X11GraphicsEnvironment, java.endorsed.dirs=/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/endorsed, os.arch=amd64, java.io.tmpdir=/tmp, line.separator=
, java.vm.specification.vendor=Sun Microsystems Inc., os.name=Linux, sun.jnu.encoding=UTF-8, java.library.path=/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/amd64/server:/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/amd64:/usr/local/apps/inst/java/jdk1.5.0_04/jre/../lib/amd64:/usr/lib/mozilla/, java.specification.name=Java Platform API Specification, java.class.version=49.0, sun.management.compiler=HotSpot 64-Bit Server Compiler, os.version=2.6.10-5-amd64-generic, user.home=/home/djb, user.timezone=Europe/London, java.awt.printerjob=sun.print.PSPrinterJob, file.encoding=UTF-8, java.specification.version=1.5, hibernate.connection.driver_class=org.apache.derby.jdbc.EmbeddedDriver, user.name=djb, java.class.path=/home/djb/workspaces/eclipse-SDK-3.1/workspace/pics-core-db-model/bin:/home/djb/maven/repository/antlr/jars/antlr-2.7.5H3.jar:/home/djb/maven/repository/asm/jars/asm-1.5.3.jar:/home/djb/maven/repository/asm/jars/asm-attrs-1.5.3.jar:/home/djb/maven/repository/commons-lang/jars/commons-lang-2.0.jar:/home/djb/maven/repository/commons-logging/jars/commons-logging-1.0.4.jar:/home/djb/maven/repository/commons-collections/jars/commons-collections-3.1.jar:/home/djb/maven/repository/cglib/jars/cglib-2.1.jar:/home/djb/maven/repository/dbunit/jars/dbunit-2.1.jar:/home/djb/maven/repository/dom4j/jars/dom4j-1.6.jar:/home/djb/maven/repository/ehcache/jars/ehcache-1.1.jar:/home/djb/maven/repository/gsbase/jars/gsbase-2.0.1.jar:/home/djb/maven/repository/hibernate/jars/hibernate-3.1-beta1.jar:/home/djb/maven/repository/hibernate/jars/hibernate-annotations-3.1-beta4.jar:/home/djb/maven/repository/hibernate/jars/hibernate-tools-3.0.0-alpha4.jar:/home/djb/maven/repository/jta/jars/jta-1.0.jar:/home/djb/maven/repository/jtidy/jars/jtidy-r8-21122004.jar:/usr/local/apps/inst/eclipse/eclipse-SDK-3.1-linux-gtk-x86_64/plugins/org.junit_3.8.1/junit.jar:/home/djb/maven/repository/log4j/jars/log4j-1.2.9.jar:/home/djb/maven/repository/mysql/jars/mysql-connector-java-3.1.7-bin.jar:/home/djb/maven/repository/velocity/jars/velocity-1.4.jar:/home/djb/maven/repository/velocity-tools/jars/velocity-tools-generic-1.1.jar:/home/djb/maven/repository/derby/jars/derby-10.0.2.1.jar:/home/djb/maven/repository/derby/jars/derbynet-10.0.2.1.jar:/home/djb/maven/repository/derby/jars/derbytools-10.0.2.1.jar:/home/djb/maven/repository/jtopen/jars/jtopen-jt400-4.8.jar:/home/djb/maven/repository/hsqldb/jars/hsqldb-1.7.3.3.jar:/home/djb/maven/repository/hibernate/jars/ejb-3.0-pr.jar:/usr/local/apps/inst/eclipse/eclipse-SDK-3.1-linux-gtk-x86_64/plugins/org.eclipse.jdt.junit_3.1.0/junitsupport.jar:/usr/local/apps/inst/eclipse/eclipse-SDK-3.1-linux-gtk-x86_64/plugins/org.eclipse.jdt.junit.runtime_3.1.0/junitruntime.jar, hibernate.show_sql=true, java.vm.specification.version=1.0, java.home=/usr/local/apps/inst/java/jdk1.5.0_04/jre, sun.arch.data.model=64, hibernate.connection.url=jdbc:derby:target/zpics;create=true, hibernate.dialect=org.hibernate.dialect.DerbyDialect, user.language=en, java.specification.vendor=Sun Microsystems Inc., hibernate.cglib.use_reflection_optimizer=true, java.vm.info=mixed mode, java.version=1.5.0_04, java.ext.dirs=/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/ext, sun.boot.class.path=/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/rt.jar:/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/i18n.jar:/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/sunrsasign.jar:/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/jsse.jar:/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/jce.jar:/usr/local/apps/inst/java/jdk1.5.0_04/jre/lib/charsets.jar:/usr/local/apps/inst/java/jdk1.5.0_04/jre/classes, java.vendor=Sun Microsystems Inc., file.separator=/, java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi, sun.io.unicode.encoding=UnicodeLittle, sun.cpu.endian=little, sun.desktop=gnome, sun.cpu.isalist=}
2005-08-08 18:08:09 [main] DEBUG com.dolby.pics.core.db.model.test.HibernateUtil [<clinit>() :52] - Configuration [/hibernate-test.cfg.xml] loaded
2005-08-08 18:08:10 [main] DEBUG com.dolby.pics.core.db.model.test.HibernateUtil [<clinit>() :54] - target exists: false
2005-08-08 18:08:12 [main] DEBUG org.hibernate.cfg.Configuration [buildSessionFactory() :1025] - Preparing to build session factory with filters : {}
2005-08-08 18:08:12 [main] DEBUG org.hibernate.cfg.AnnotationConfiguration [secondPassCompile() :180] - Executing first pass of annotated classes
Failed to invoke suite(): java.lang.ExceptionInInitializerError
java.lang.ExceptionInInitializerError
   at com.dolby.pics.core.db.model.impl.BaseDAO.beginTransaction(BaseDAO.java:45)
   at com.dolby.pics.core.db.model.impl.BaseDAO.<init>(BaseDAO.java:32)
   at com.dolby.pics.core.db.model.impl.AbstractEntityObjectTestCase.<clinit>(AbstractEntityObjectTestCase.java:37)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
   at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
   at junit.framework.TestSuite.createTest(TestSuite.java:131)
   at junit.framework.TestSuite.addTestMethod(TestSuite.java:114)
   at junit.framework.TestSuite.<init>(TestSuite.java:75)
   at junit.framework.TestSuite.addTestSuite(TestSuite.java:101)
   at com.dolby.pics.core.db.model.impl.AllTests.suite(AllTests.java:34)
   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:585)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.getTest(RemoteTestRunner.java:403)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:445)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.NullPointerException
   at org.hibernate.cfg.AnnotationBinder.buildInheritanceStates(AnnotationBinder.java:1711)
   at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:184)
   at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1026)
   at com.dolby.pics.core.db.model.test.HibernateUtil.<clinit>(HibernateUtil.java:65)
   ... 20 more


Name and version of the database you are using: Apache Derby 10.0.2.1

The generated SQL (show_sql=true): Didn't get that far

Debug level Hibernate log excerpt: DEBUG


I'm having a problem with using a complex class heirachy with Hibernate. The classes are below. Each class is a subclass of the one above.

Code:


@EmbeddableSuperclass(access=AccessType.PROPERTY)
public abstract class EntityObject implements Serializable, IEntity
{
}

------------------------------------------------------------------------------

@EmbeddableSuperclass(access=AccessType.PROPERTY)
public abstract class EntityWithGeneratedId extends EntityObject
{
   /**
    *
    */
   public static final String ATTR_ID = "id"; //$NON-NLS-1$

    /** The unique id */
    private String id;

    /**
     * Creates anew entity object
     */
    public EntityWithGeneratedId()
    {
        super();
    }

    /**
     * Gets the domain objects unqique identifier
     * @return Returns the id.
     */
    @Id(generate=GeneratorType.NONE)
    @Column(name="ID", length=32, columnDefinition="char(32)") //$NON-NLS-1$ //$NON-NLS-2$
    public String getId()
    {
        return this.id;
    }

    /**
     * Sets this domain objects unique identifier
     * @param id The id to set.
     */
    void setId(final String id)
    {
        this.id = id;
    }
}

------------------------------------------------------------------------------

@Entity(access = AccessType.PROPERTY)
@Table(name = "CUSTOM_FIELD")//$NON-NLS-1$
@Inheritance(strategy = InheritanceType.SINGLE_TABLE, discriminatorType=DiscriminatorType.STRING)
@DiscriminatorColumn(name = "CF_TYPE")//$NON-NLS-1$
public abstract class AbstractCFType extends EntityWithGeneratedId
{
---
}

------------------------------------------------------------------------------

@EmbeddableSuperclass  (also tried without this)
public abstract class AbstractMultiFieldCFType extends AbstractCFType
{
---
}

------------------------------------------------------------------------------

@Entity
@Inheritance(discriminatorValue=CFType.CF_TYPE_MULTISELECT)
public class MultiSelectCFType extends AbstractMultiFieldCFType
{
   private static final long serialVersionUID = -8510737279230143486L;

   MultiSelectCFType()
   {
      super();
   }

   /**
    * Creates a new category with the given name
    * @param name The name for this category
    * @param description The description of this custom field
    */
   public MultiSelectCFType(String name, String description)
   {
      setName(name);
      setDescription(description);
   }


}



Whenever i try and run my test case i get the NullPointerException as detailed above. Am i getting the combination of @Entity and @EmbeddedSuperclass wrong? Or could it be that i have two abstract classes one after the other?

Any help would be greatfully appreciated.

Darren.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Aug 08, 2005 2:42 pm 
Beginner
Beginner

Joined: Mon Mar 28, 2005 12:58 pm
Posts: 27
Since AbstractMultiFieldCFType is the parent class of MultiSelectCFType then the inheritance annotation on MultiSelectCFType will do a lookup on the inheritance annotation of the AbstractMultiFieldCFType and not of the AbstractCFType class. I think this is where the NPE is coming from if you take a look at the AnnotationBinder code.

I don't think you're meant to make an EmbeddableSuperclass by extending from a normal entity class like you're doing with AbstractCFType and AbstractMultiFieldCFType.


Hope this helps :)


Top
 Profile  
 
 Post subject: no parent entity of EmbeddedSuperclass?
PostPosted: Mon Aug 08, 2005 5:44 pm 
Beginner
Beginner

Joined: Sun Jun 13, 2004 9:49 pm
Posts: 38
Thanks for the pointer athu9999. It looks from this code snippet (from AnnotationBinder.buildInheritanceStates()) like...

Code:
if (superState.isEmbeddableSuperclass == true) {
   state.hasParents = false;
   state.hasEmbeddedSuperclass = true;
}
else {

   state.hasParents = true;

   state.hasEmbeddedSuperclass = false;

}



... that once the binder finds an EmbeddedSuperclass is assumes that it has no parent @Entity?

But, mine has. I'm not familiar with the code, but that looks like what is happening? It looks like you cannot have an EmbeddedSuperClass in the middle of the inheritance hierachy.

Any thoughts?


Top
 Profile  
 
 Post subject: Whoa
PostPosted: Mon Aug 08, 2005 5:56 pm 
Beginner
Beginner

Joined: Sun Jun 13, 2004 9:49 pm
Posts: 38
I clicked NO for post did not solve the problem, but it sure was helpful!!!!!!!
Sorry athu9999, fisrt time i've rated. Didn't know it put up "Not helpful".

daz


Top
 Profile  
 
 Post subject:
PostPosted: Mon Aug 08, 2005 10:09 pm 
Hibernate Team
Hibernate Team

Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
An @EmbeddableSuperclass having an superclass annotated @Entity make no sense, I fixed the NPE with a more convinient exception.

_________________
Emmanuel


Top
 Profile  
 
 Post subject: I believe it does..
PostPosted: Tue Aug 09, 2005 3:49 am 
Beginner
Beginner

Joined: Sun Jun 13, 2004 9:49 pm
Posts: 38
My class hiearchy relies on 2 abstract superclasses: EntityObject and Entity Object with generated ID. I then have an @Entity AbstractCustomField which is the base class for all custom field within my domain model. I then have another abstract class which defines the base class for all multi-select custom fields. Then there is the @Entity which is the MultiField custom field.

This structure requires that there be a superclass @Entity of an @EmbeddedSuperclass subclass, if you see what i mean.

Would this be easy to implement?

Can you give me a few pointers and i'll have a look at the code.

Thanks.


Top
 Profile  
 
 Post subject:
PostPosted: Thu Aug 11, 2005 5:16 am 
Hibernate Team
Hibernate Team

Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
you don't need @EmbeddedSuperclass in the middle of the hierarchy, just use @entity instead.

_________________
Emmanuel


Top
 Profile  
 
Display posts from previous:  Sort by  
Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 7 posts ] 

All times are UTC - 5 hours [ DST ]


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
© Copyright 2014, Red Hat Inc. All rights reserved. JBoss and Hibernate are registered trademarks and servicemarks of Red Hat, Inc.