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ydewit
 Post subject: IllegalArgumentException saving POJO with inheritance
PostPosted: Sun Apr 10, 2005 8:33 pm 
Newbie

Joined: Sun Apr 10, 2005 2:20 am
Posts: 15
So I modified my little graph model and now I have, in addition to Parent, Link and Node, two subclasses of Node: DataNode and ExecutableNode.

When persisting Parent containing aLink and anExecutableNode and aDataNode, I get the following exception:

Code:
- IllegalArgumentException in class: ExecutableNode, getter method of property: executions


After some debugging I found out that SaveOrUpdateEvent object that is created in org.hibernate.impl.SessionImpl line 415 contains:
Code:
SaveOrUpdateEvent
{
   entity = aDataNode
   entityName = "ExecutableNode"
   entry = null
   object = aDataNode
   requestId = null
   sessionImpl = aSessionImpl
}


As you can see entity and entityName refer to the same instance of DataNode. However, the entityName refers to the ExecutableNode class name. Down at BasicPropertyAccessor$BasicGetter.get(Object) line 119 I get the above exception because Hibernate is trying to get a property from class ExecutableNode but it is passing a DataNode instance as the target. It seems to mixing up subclass instances of Node.

FYI: I have one mapping file per class and I am using <subclass> with a discriminator for each of the two subclasses.

Any ideas what is going on here?

-- yuri

Here is the full exception:
Code:
- IllegalArgumentException in class: com.metaserver.engine.process.instance.ActivityInstance, getter method of property: activityExecutions
org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of ExecutableNode.executions
   at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:119)
   at org.hibernate.tuple.AbstractTuplizer.getPropertyValue(AbstractTuplizer.java:195)
   at org.hibernate.persister.entity.BasicEntityPersister.getPropertyValue(BasicEntityPersister.java:2937)
   at org.hibernate.engine.Cascades.cascade(Cascades.java:817)
   at org.hibernate.event.def.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:330)
   at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:212)
   at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:158)
   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:96)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
   at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:416)
   at org.hibernate.engine.Cascades$5.cascade(Cascades.java:153)
   at org.hibernate.engine.Cascades.cascade(Cascades.java:721)
   at org.hibernate.engine.Cascades.cascadeCollection(Cascades.java:860)
   at org.hibernate.engine.Cascades.cascade(Cascades.java:739)
   at org.hibernate.engine.Cascades.cascade(Cascades.java:817)
   at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:361)
   at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:263)
   at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:158)
   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
   at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
   at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:429)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:424)
   at Main.createGraph(Main.java:446)
   at Main.main(Main.java:374)
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:324)
   at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:105)
   ... 30 more
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ydewit
 Post subject:
PostPosted: Sun Apr 10, 2005 8:58 pm 
Newbie

Joined: Sun Apr 10, 2005 2:20 am
Posts: 15
Ok, I guess going through my problem and writting it down made me realize what the problem was:
Code:
   <set name="nodes" inverse="true" cascade="all-delete-orphan">
         <key column="parent"/>
         <one-to-many class="ExecutableNode"/>
   </set>


Instead of:
Code:
   <set name="nodes" inverse="true" cascade="all-delete-orphan">
         <key column="parent"/>
         <one-to-many class="Node"/>
   </set>


I fixed it and it worked fine. I guess the only trouble was figuring out the real problem when I hit the exception.

thanks,

-- yuri
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eku
 Post subject: Similar problem.
PostPosted: Wed Oct 26, 2005 8:04 pm 
Newbie

Joined: Wed Oct 26, 2005 7:56 pm
Posts: 1
I am getting the same exception, except I don't see the problem. I am using an associated mapping - unidirectional one-to-one from object Listing to object Areas.

Code:
<class name="Listing" table="Listings">
...
<many-to-one name="area"
   class="Areas"
   column="AREA"
   unique="true" />
...
</class>

<class name="Areas" table="Areas">
   <id name="id" column="areaId" type="java.lang.Integer">
      <generator class="native"/>
   </id>
...
</class>


The exception I am getting when I try to read a Listing object is:
Code:
org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of com.itspd.hibernate.AbstractAreas.id


Am I overlooking something?

Thanks in advance,
Paul
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npeeters
 Post subject: Same problem
PostPosted: Sun Jan 29, 2006 4:28 pm 
Newbie

Joined: Fri Dec 30, 2005 5:25 am
Posts: 13
I am having a similar problem, here's my exception... Any ideas?
I'm using Hibernate 3.1, HSQLDB and JDK 1.5.

Thanks!

Nicolas

Code:
org.springframework.webflow.ActionExecutionException: Exception thrown executing action 'flows.ProjectAction@cac877' in state 'gatherToolsInfo' of flow 'registration'; nested exception is org.springframework.orm.hibernate3.HibernateSystemException: IllegalArgumentException
occurred calling getter of domain.AbstractDomainEntity.id; nested exception is org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of domain.AbstractDomainEntity.id
org.springframework.orm.hibernate3.HibernateSystemException: IllegalArgumentException occurred calling getter of domain.AbstractDomainEntity.id; nested exception is org.hiber
nate.PropertyAccessException: IllegalArgumentException occurred calling getter of domain.AbstractDomainEntity.id
org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of domain.AbstractDomainEntity.id
        at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:1
71)
        at org.hibernate.tuple.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:176)
....
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mzafer
 Post subject:
PostPosted: Thu Feb 16, 2006 12:18 am 
Newbie

Joined: Tue Jan 31, 2006 11:04 pm
Posts: 2
Hi All,

Any luck with IllegalArgumentException exception when saving the subclass. I am running into the same error, and have no idea what's wrong.

Thanks.

The error trace is

org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of com.peye.model.ContactLensHistory.answerType
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:119)
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.getForInsert(BasicPropertyAccessor.java:124)
at org.hibernate.tuple.AbstractTuplizer.getPropertyValuesToInsert(AbstractTuplizer.java:189)
at org.hibernate.tuple.PojoTuplizer.getPropertyValuesToInsert(PojoTuplizer.java:194)
at org.hibernate.persister.entity.BasicEntityPersister.getPropertyValuesToInsert(BasicEntityPersister.java:3005)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:216)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:160)
::::::::::
::::::::::::::::
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException@952527
at sun.reflect.GeneratedMethodAccessor104.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
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npeeters
 Post subject:
PostPosted: Thu Feb 16, 2006 3:54 am 
Newbie

Joined: Fri Dec 30, 2005 5:25 am
Posts: 13
The problem I had had actually nothing to do with the class he was complaining about. This class was a superclass from all my "Domain" object.

What really happened (after some debugging I finally found out), is that at the time the real object (which a subclass of the Abstract... it was complaining about) could not be correctly retrieved in the application logic (it was a Spring MVC form binding issue).

I would have loved to get an error message like: "Hey idiot, why are trying to call get in a object which is not even a subclass of the Abstract..., I can't do that...". Of course, I'd check your getter/setters (you can have them auto-generated by your IDE) and your inheritance tree.

Just my 2 cents.

Good luck
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