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tyellin
 Post subject: "instance not of expected entity type", dynamic-ma
PostPosted: Mon Sep 12, 2005 5:55 pm 
Newbie

Joined: Mon Sep 12, 2005 5:18 pm
Posts: 6
Location: Cambridge, MA, USA
I am using dynamic-map persistence.
I have a mapping with subclass elements and a discriminator.
Queries execute just fine and return me a logical Map with the right elements for each subclass.
However, when I try to create a new Map and persist it, I get "org.hibernate.HibernateException: instance not of expected entity type: Entity", Entity being the superclass entity-name. I get the same message whether I specify "Entity" or one of the subclass types in sess.save(). When I remove the discriminator and subclass mappings, I can persist objects of the superclass type w/ no problem.


(How would Hibernate even know that the instance is not of the right type w/ dynamic-map strategy?)

(More info on the legacy schema, if this is helpful or anyone can recommend alternative mapping strategies:
I have a table called ACCOUNTS and a table called NAMES. ACCOUNTS is keyed by ACCOUNT_ID; NAMES is keyed by composite ACCOUNT_ID, NAME_ID. NAME_ID=0 represents the "account name" - e.g., name of an organization, while NAME_ID>0 represents individual people on the account. I am attempting to map as follows:
superclass - Entity, which represents EITHER an account or a name (this is useful b/c other things in the system can point to either account-level or name-level entities)
subclasses:
Account - represents an account, and getNameLine returns the account name (name_id=0); allows addition of new people (not yet mapped)
Person - represents an individual person on an account (name_id>0)

So I thought it would make sense to make the primary table of the mapping NAMES (even though ACCOUNTS is the parent table - every ACCOUNT must have a NAME_ID=0 record in NAMES), and have the Person subclass get additional Person-specific fields from NAMES, and have the Account subclass join to ACCOUNTS to get account-specific info.

As I said, this works beautifully when querying - it just won't persist a new Map.)

Next step for me is going to be to create concrete classes and switch back to POJO to see if the problem is really my mapping or if it's related to using dynamic-map mode.

Hibernate version:3.0

Mapping documents:
entity.hbm.xml
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
      "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping schema="PBDS" package="com.tsi.ta.model.persistence.entity.core">
  <class entity-name="Entity" table="NAMES">

    <composite-id name="entityId">
      <key-property name="accountId" column="ACCOUNT_ID" type="integer"/>
      <key-property name="nameId" column="NAME_ID" type="integer"/>
    </composite-id>
   
    <discriminator column="NAME_ID" type="string" formula="CASE WHEN NAME_ID=0 THEN 'A' ELSE 'P' END"/>
    <!--discriminator column="STAFF" type="string"/-->

    <property name="nameLine" column="NAME_LINE" type="string"/>
    <property name="alphaName" column="ALPHA_NAME" type="string"/>
    <property name="userInserting" column="USER_INSERTING" type="string"/>
    <property name="dateInserted" column="DATE_INSERTED" type="calendar_date"/>
    <property name="userUpdating" column="USER_UPDATING" type="string"/>
    <property name="dateUpdated" column="DATE_UPDATED" type="calendar_date"/>
    <property name="comments" column="COMMENTS" type="string"/>

    <many-to-one name="status" entity-name="Status" lazy="false">
      <column name="STS"/>
      <formula>'AC'</formula>
    </many-to-one>

    <subclass entity-name="com.tsi.ta.model.persistence.entity.core.Account" discriminator-value="A">
      <join table="TY_ACCOUNTS">
        <key>
          <column name="ACCOUNT_ID"/>
          <column name="NAME_ID"/>
        </key>
        <property name="accountType" column="ACCOUNT_TYPE" type="string"/>
        <property name="affiliation" column="AFFILIATION" type="string"/>
      </join>
    </subclass>

    <subclass entity-name="com.tsi.ta.model.persistence.entity.core.Person" discriminator-value="P">
      <property name="title" column="TITLE" type="string"/>
      <property name="firstName" column="FIRST_NAME" type="string"/>
      <property name="middleName" column="MIDDLE_NAME" type="string"/>
      <property name="lastName" column="LAST_NAME" type="string"/>
      <property name="suffix" column="SUFFIX" type="string"/>
    </subclass>
   
  </class>
</hibernate-mapping>



Code between sessionFactory.openSession() and session.close():
Code:
    t = s.beginTransaction();
    Map e = new HashMap();
    //I've tried lots of different things in here, always w/ the same result.
    s.save("com.tsi.ta.model.persistence.entity.core.Person",e);
    t.commit();


Full stack trace of any exception that occurs:
Code:
org.hibernate.HibernateException: instance not of expected entity type: Entity

   at org.hibernate.persister.entity.BasicEntityPersister.getSubclassEntityPersister(BasicEntityPersister.java:2986)

   at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1089)

   at org.hibernate.id.Assigned.generate(Assigned.java:31)

   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:85)

   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)

   at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)

   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)

   at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)

   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)

   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:480)

   at com.tsi.ta.test.model.Tester3.testPersist(Tester3.java:133)

   at com.tsi.ta.test.model.Tester3.main(Tester3.java:144)



Name and version of the database you are using:Oracle 9.2.0.6.0

The generated SQL (show_sql=true):N/A

Debug level Hibernate log excerpt:
Code:
Sep 12, 2005 5:25:47 PM org.hibernate.cfg.Configuration addResource

INFO: Mapping resource: com\tsi\ta\model\persistence\entity\core\mappings\Entity.hbm.xml

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.HbmBinder bindRootPersistentClassCommonValues

INFO: Mapping class: Entity -> NAMES

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.HbmBinder bindSubclass

INFO: Mapping subclass: com.tsi.ta.model.persistence.entity.core.Account -> NAMES

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.HbmBinder bindJoin

INFO: Mapping class join: com.tsi.ta.model.persistence.entity.core.Account -> TY_ACCOUNTS

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.HbmBinder bindSubclass

INFO: Mapping subclass: com.tsi.ta.model.persistence.entity.core.Person -> NAMES

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.Configuration addResource

INFO: Mapping resource: com\tsi\ta\model\persistence\core\mappings\Status.hbm.xml

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.HbmBinder bindRootPersistentClassCommonValues

INFO: Mapping class: Status -> SYSTEM_STATUS

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.HbmBinder bindCompositeId

WARNING: Could not perform validation checks for component as the class com.tsi.ta.model.persistence.core.CompositeCode was not found

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.Configuration addResource

INFO: Mapping resource: com\tsi\ta\model\persistence\core\mappings\StatusType.hbm.xml

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.HbmBinder bindRootPersistentClassCommonValues

INFO: Mapping class: StatusType -> STATUS_TYPE

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.Configuration secondPassCompile

INFO: processing extends queue

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.Configuration secondPassCompile

INFO: processing collection mappings

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.Configuration secondPassCompile

INFO: processing association property references

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.Configuration secondPassCompile

INFO: processing foreign key constraints

Sep 12, 2005 5:25:47 PM org.hibernate.connection.DriverManagerConnectionProvider configure

INFO: Using Hibernate built-in connection pool (not for production use!)

Sep 12, 2005 5:25:47 PM org.hibernate.connection.DriverManagerConnectionProvider configure

INFO: Hibernate connection pool size: 20

Sep 12, 2005 5:25:47 PM org.hibernate.connection.DriverManagerConnectionProvider configure

INFO: autocommit mode: false

Sep 12, 2005 5:25:47 PM org.hibernate.connection.DriverManagerConnectionProvider configure

INFO: using driver: oracle.jdbc.driver.OracleDriver at URL: jdbc:oracle:thin:@linuxdev01-vhost1:1521:lnx1

Sep 12, 2005 5:25:47 PM org.hibernate.connection.DriverManagerConnectionProvider configure

INFO: connection properties: {user=pbds  , password=****}

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: RDBMS: Oracle, version: Oracle9i Release 9.2.0.6.0 - Production
JServer Release 9.2.0.6.0 - Production

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: JDBC driver: Oracle JDBC driver, version: 9.0.1.5.0

Sep 12, 2005 5:25:47 PM org.hibernate.dialect.Dialect <init>

INFO: Using dialect: org.hibernate.dialect.OracleDialect

Sep 12, 2005 5:25:47 PM org.hibernate.transaction.TransactionFactoryFactory buildTransactionFactory

INFO: Using default transaction strategy (direct JDBC transactions)

Sep 12, 2005 5:25:47 PM org.hibernate.transaction.TransactionManagerLookupFactory getTransactionManagerLookup

INFO: No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Automatic flush during beforeCompletion(): disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Automatic session close at end of transaction: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: JDBC batch size: 15

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: JDBC batch updates for versioned data: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Scrollable result sets: enabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: JDBC3 getGeneratedKeys(): disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Connection release mode: null

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Default batch fetch size: 1

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Generate SQL with comments: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Order SQL updates by primary key: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory createQueryTranslatorFactory

INFO: Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory

Sep 12, 2005 5:25:47 PM org.hibernate.hql.ast.ASTQueryTranslatorFactory <init>

INFO: Using ASTQueryTranslatorFactory

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Query language substitutions: {}

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Second-level cache: enabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Query cache: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory createCacheProvider

INFO: Cache provider: org.hibernate.cache.EhCacheProvider

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Optimize cache for minimal puts: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Structured second-level cache entries: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Echoing all SQL to stdout

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Statistics: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Deleted entity synthetic identifier rollback: disabled

Sep 12, 2005 5:25:47 PM org.hibernate.cfg.SettingsFactory buildSettings

INFO: Default entity-mode: dynamic-map

Sep 12, 2005 5:25:47 PM org.hibernate.impl.SessionFactoryImpl <init>

INFO: building session factory

Sep 12, 2005 5:25:47 PM org.hibernate.impl.SessionFactoryObjectFactory addInstance

INFO: Not binding factory to JNDI, no JNDI name configured

Sep 12, 2005 5:25:47 PM org.hibernate.impl.SessionFactoryImpl checkNamedQueries

INFO: Checking 0 named queries
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tyellin
 Post subject:
PostPosted: Tue Sep 13, 2005 4:43 pm 
Newbie

Joined: Mon Sep 12, 2005 5:18 pm
Posts: 6
Location: Cambridge, MA, USA
I have now mapped concrete classes using this mapping (switching "entity-name" to "name" and switching from dynamic-map to pojo), and it works just fine.

I'm really stumped and extremely frustrated. Can anyone help show me the error of my ways? I've scoured the documentation looking for answers, but at this point help on dynamic-maps is pretty sparse (although in theory it's supposed to be basically the same mapping, yes?).
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tyellin
 Post subject:
PostPosted: Wed Sep 14, 2005 10:24 am 
Newbie

Joined: Mon Sep 12, 2005 5:18 pm
Posts: 6
Location: Cambridge, MA, USA
OK, it looks like the "problem" is in BasicEntityPersister:

(402-409)
Code:
if ( persistentClass.hasPojoRepresentation() ) {
  //TODO: this is currently specific to pojos, but need to be available for all entity-modes
  Iterator iter = persistentClass.getSubclassIterator();
  while ( iter.hasNext() ) {
    PersistentClass pc = ( PersistentClass ) iter.next();
    entityNameBySubclass.put( pc.getMappedClass(), pc.getEntityName() );
  }
}


which later causes the observed error:

(2984-2987)
Code:
String subclassEntityName = getSubclassEntityName( clazz );
if ( subclassEntityName == null ) {
  throw new HibernateException( "instance not of expected entity type: " + getEntityName() );
}


Does anyone know when or if this is slated to be fixed? Additionally, is there a list out there of key limitations in advertised features?
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emmanuel
 Post subject:
PostPosted: Thu Sep 15, 2005 4:15 pm 
Hibernate Team
Hibernate Team

Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
This is advertized, the feature is marked as experimental in the doc

_________________
Emmanuel

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tyellin
 Post subject:
PostPosted: Thu Sep 15, 2005 5:19 pm 
Newbie

Joined: Mon Sep 12, 2005 5:18 pm
Posts: 6
Location: Cambridge, MA, USA
I don't understand how I would ever conclude from the documentation's description of the feature as "experimental" that a major mapping feature (polymorphism) does not work yet.

By posting, I was looking for someone to confirm for me that what I was trying to do is in fact not supported, rather than I'm doing something wrong. Are you saying that I should have simply assumed, as soon as I hit any snag at all, that what I'm trying to do can't be done, rather than seeking assistance? What's the point of the forums if that is the case?

I REALLY don't care that the feature wasn't implemented, I care that it wasn't considered major enough to document. Polymorphism is one of the core features of objects, so I don't see how not supporting it could be considered unimportant in the scope of this new feature.

Anyway, I would appreciate someone answering my question about when this is slated to be added. Thanks.
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emmanuel
 Post subject:
PostPosted: Fri Sep 16, 2005 11:59 am 
Hibernate Team
Hibernate Team

Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
I was just adding some precision on the "advertised features", namely the fact that it is marked as experimental: so bugs in this area are to be expected.
There are some limitations in the polymorphic area, but I can't tell what exactly and can't tell either when someone will have time to look at it.

_________________
Emmanuel

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tyellin
 Post subject:
PostPosted: Fri Sep 16, 2005 12:39 pm 
Newbie

Joined: Mon Sep 12, 2005 5:18 pm
Posts: 6
Location: Cambridge, MA, USA
That's fair - thanks for your time.
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gdonkers
 Post subject: dynamic mapping and inheritance
PostPosted: Fri Jan 12, 2007 3:21 am 
Newbie

Joined: Fri Jan 12, 2007 3:17 am
Posts: 1
I just saw this thread but it's over a year old now. Has this been fixed now, i.e. does Hibernate now support inheritance with dynamic mapping?
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ottrich
 Post subject: Re: dynamic mapping and inheritance
PostPosted: Wed Nov 28, 2007 10:40 am 
Newbie

Joined: Mon Sep 10, 2007 9:30 am
Posts: 12
Hello,

sorry, own problem fixed.

regards
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