Re: Problem retrieving collection.

Wed, 23 Mar 2005 10:29:19 -0800 

hi armin,

that's exactly the same answer i posted a minute ago :)

jakob

Armin Waibel schrieb: 
Hi again,

change

<foreignkey field-ref="objectId"/>

to

<foreignkey field-ref="clientRelationshipId"/>

in

<reference-descriptor name="clientRelationship"
class-ref="model.client.ClientRelationship">
        <foreignkey field-ref="objectId"/>
</reference-descriptor>

of class NewClientGroup.

regards,
Armin


Lemke, Wesley wrote:

I apologize for sending so many messages to the list, but this one
really has me scratching my head.  Here is the data stored in the
database:

mysql> select group_id, client_id, name, parent_id, class_name from
client_group;
+----------+-----------+---------------------+-----------+--------------
---------------+
| group_id | client_id | name                | parent_id | class_name
|
+----------+-----------+---------------------+-----------+--------------
---------------+
|        1 |         1 | First Client Group  |      NULL |
model.client.NewClientGroup |
|        4 |         1 | Second Client Group |      NULL |
model.client.NewClientGroup |
+----------+-----------+---------------------+-----------+--------------
---------------+
2 rows in set (0.00 sec)

mysql> select * from client;
+-----------+--------------+--------------------+
| client_id | agr_approver | last_modified_user |
+-----------+--------------+--------------------+
|         1 | Zeus         | N0079911           |
+-----------+--------------+--------------------+
1 row in set (0.01 sec)

Here is my mapping (It worked fine for storing the items):

<class-descriptor
    class="model.AdmObject">
    <extent-class class-ref="model.client.ClientRelationship" />
    <extent-class class-ref="model.client.GenericGroup" />
</class-descriptor>

<class-descriptor
    class="model.client.GenericGroup">
    <extent-class class-ref="model.client.NewClientGroup" />
</class-descriptor>

<class-descriptor
class="model.client.ClientRelationship"
table="client">
<field-descriptor
name="objectId"
column="client_id"
jdbc-type="INTEGER"
primarykey="true"
autoincrement="true"
access="readonly"
/>
<field-descriptor
name="nameOfApproverOfNoContract"
column="agr_approver"
jdbc-type="VARCHAR"
/> <collection-descriptor
name="clientGroups"
element-class-ref="model.client.NewClientGroup"
auto-delete="true"
auto-update="true"
>
<inverse-foreignkey field-ref="clientRelationshipId" />
</collection-descriptor> </class-descriptor>

<class-descriptor
class="model.client.NewClientGroup"
table="client_group">
<field-descriptor
name="objectId"
column="group_id"
jdbc-type="INTEGER"
primarykey="true"
autoincrement="true"
access="readonly"
/>
<field-descriptor
name="clientRelationshipId"
column="client_id"
jdbc-type="INTEGER"
/> <field-descriptor
name="name"
column="NAME"
jdbc-type="VARCHAR"
/>
<field-descriptor
name="ojbConcreteClass"
column="CLASS_NAME"
jdbc-type="VARCHAR"
/>
<reference-descriptor name="clientRelationship"
class-ref="model.client.ClientRelationship">
<foreignkey field-ref="objectId"/>
</reference-descriptor> </class-descriptor>
</descriptor-repository>

And here is my code:

        Query q = new QueryByCriteria(ClientRelationship.class);
        Collection clientRelationships =
broker.getCollectionByQuery(q);
        Iterator i = clientRelationships.iterator();

writer.println("<br><br>");
while (i.hasNext()) {
ClientRelationship cr = (ClientRelationship)
i.next();
writer.println(cr.getNameOfApproverOfNoContract() + "<br>\n");
List clientGroups = cr.getClientGroups();
Iterator gi = clientGroups.iterator();
while (gi.hasNext()) {
NewClientGroup ncg = (NewClientGroup)
gi.next();
writer.println("&nbsp;&nbsp;&nbsp;" +
ncg.getName() + "<br>\n");
}
}

When I run this code, here is the error:

[3/23/05 11:19:33:220 CST] 6c8a022d WebGroup      I SRVE0180I:
[CollapsedTwo] [/CollapsedTwo] [Servlet.LOG]:
servlets.InheritanceServlet: init
[3/23/05 11:19:34:982 CST] 6c8a022d SystemOut     O
[org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl] DEBUG:
SQL:SELECT A0.agr_approver,A0.client_id FROM client A0
[3/23/05 11:19:35:012 CST] 6c8a022d ConnectionFac I J2CA0122I: Resource
reference jdbc/ao79 could not be located, so default values of the
following are used: [Resource-ref settings]

    res-auth:                 1 (APPLICATION)
    res-isolation-level:      0 (TRANSACTION_NONE)
    res-sharing-scope:        true (SHAREABLE)
    res-resolution-control:   999 (undefined)
[Other attributes]

isCMP1_x:                 false (not CMP1.x)
isJMS:                 false (not JMS)

[3/23/05 11:19:35:212 CST] 6c8a022d SystemOut     O
[org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl] DEBUG:
SQL:SELECT A0.CLASS_NAME,A0.group_id,A0.NAME,A0.client_id FROM
client_group A0 WHERE ( A0.client_id = ?) AND  (A0.CLASS_NAME = ?)
[3/23/05 11:19:35:222 CST] 6c8a022d SystemOut     O [PersistentField]
ERROR: while set field: [try to set 'object value' in 'target object'
target obj class: model.client.NewClientGroup
target field name: clientRelationship
target field type: class model.client.ClientRelationship
object value class: model.client.NewClientGroup
object value: [EMAIL PROTECTED]
]
org.apache.ojb.broker.metadata.MetadataException: IllegalAccess error
setting field:clientRelationship in object:model.client.NewClientGroup
    at
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.setValueFor(Unknown Source)
    at
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.set(Unknown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReference(Unknow
n Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReferences(Unkno
wn Source)
    at
org.apache.ojb.broker.accesslayer.RsIterator.getObjectFromResultSet(Unkn
own Source)
    at org.apache.ojb.broker.accesslayer.RsIterator.next(Unknown
Source)
    at
org.apache.ojb.broker.accesslayer.BasePrefetcher.prefetchRelationship(Un
known Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.performRetrievalTasks(Un
known Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(Un
known Source)
    at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
    at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
    at
servlets.InheritanceServlet.printGroups(InheritanceServlet.java:123)
    at
servlets.InheritanceServlet.doPost(InheritanceServlet.java:75)
    at servlets.InheritanceServlet.doGet(InheritanceServlet.java:44)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictSe
rvletInstance.java:110)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLi
fecycleServlet.java:174)
    at
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycle
Servlet.java:313)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLif
ecycleServlet.java:116)
    at
com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.
java:283)
    at
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(Vali
dServletReferenceState.java:42)
    at
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Servle
tInstanceReference.java:40)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java:948)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java:530)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java:176)
    at
com.ibm.ws.webcontainer.servlet.InvokerServlet.service(InvokerServlet.ja
va:255)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictSe
rvletInstance.java:110)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLi
fecycleServlet.java:174)
    at
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycle
Servlet.java:313)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLif
ecycleServlet.java:116)
    at
com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.
java:283)
    at
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(Vali
dServletReferenceState.java:42)
    at
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Servle
tInstanceReference.java:40)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java:948)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java:530)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java:176)
    at
com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:7
9)
    at
com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInv
oker.java:201)
    at
com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocati
on(CachedInvocation.java:71)
    at
com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(Servle
tRequestProcessor.java:182)
    at
com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSELis
tener.java:334)
    at
com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection
.java:56)
    at
com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:
610)
    at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:431)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:593)
Caused by: java.lang.IllegalArgumentException: field type mismatch
    at java.lang.reflect.Field.set(Native Method)
    ... 50 more
[3/23/05 11:19:35:242 CST] 6c8a022d WebGroup      E SRVE0026E: [Servlet
Error]-[servlets.InheritanceServlet]:
org.apache.ojb.broker.PersistenceBrokerException:
org.apache.ojb.broker.metadata.MetadataException: IllegalAccess error
setting field:clientRelationship in object:model.client.NewClientGroup
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(Un
known Source)
    at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
    at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
    at
servlets.InheritanceServlet.printGroups(InheritanceServlet.java:123)
    at
servlets.InheritanceServlet.doPost(InheritanceServlet.java:75)
    at servlets.InheritanceServlet.doGet(InheritanceServlet.java:44)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictSe
rvletInstance.java:110)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLi
fecycleServlet.java:174)
    at
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycle
Servlet.java:313)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLif
ecycleServlet.java:116)
    at
com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.
java:283)
    at
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(Vali
dServletReferenceState.java:42)
    at
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Servle
tInstanceReference.java:40)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java:948)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java:530)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java:176)
    at
com.ibm.ws.webcontainer.servlet.InvokerServlet.service(InvokerServlet.ja
va:255)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictSe
rvletInstance.java:110)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLi
fecycleServlet.java:174)
    at
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycle
Servlet.java:313)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLif
ecycleServlet.java:116)
    at
com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.
java:283)
    at
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(Vali
dServletReferenceState.java:42)
    at
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Servle
tInstanceReference.java:40)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java:948)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java:530)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java:176)
    at
com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:7
9)
    at
com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInv
oker.java:201)
    at
com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocati
on(CachedInvocation.java:71)
    at
com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(Servle
tRequestProcessor.java:182)
    at
com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSELis
tener.java:334)
    at
com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection
.java:56)
    at
com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:
610)
    at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:431)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:593)
Caused by: org.apache.ojb.broker.metadata.MetadataException:
IllegalAccess error setting field:clientRelationship in
object:model.client.NewClientGroup
    at
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.setValueFor(Unknown Source)
    at
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.set(Unknown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReference(Unknow
n Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReferences(Unkno
wn Source)
    at
org.apache.ojb.broker.accesslayer.RsIterator.getObjectFromResultSet(Unkn
own Source)
    at org.apache.ojb.broker.accesslayer.RsIterator.next(Unknown
Source)
    at
org.apache.ojb.broker.accesslayer.BasePrefetcher.prefetchRelationship(Un
known Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.performRetrievalTasks(Un
known Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    ... 41 more
Caused by: java.lang.IllegalArgumentException: field type mismatch
    at java.lang.reflect.Field.set(Native Method)
    ... 50 more

[3/23/05 11:19:35:493 CST] 6c8a022d OSEListenerDi E PLGN0021E: Servlet
Request Processor Exception: Virtual Host/WebGroup Not Found : The web
group /favicon.ico has not been defined


Does anyone know why I am getting this error?

-----Original Message-----
From: Lemke, Wesley Sent: Wednesday, March 23, 2005 10:31 AM
To: 'OJB Users List'
Subject: RE: Updating instead of Inserting


I still am unable to retrieve objects from the database.  I've stepped
through the code, but am having problems understanding what is going on.

At line 158 of
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.java setValueFor() is being called with the Field's name =
clientRelationship, and the type=Class model.client.ClientRelationship.
However, the target and value objects are the same object (they have the
same id), and are type NewClientGroup.

Shouldn't the target and value objects be of type ClientRelationship?

The other thing I noticed is the second time I run my code I don't get
an exception, but I also don't get the NewClientGroups.  I'm assuming
this has something to do with the caching...

-----Original Message-----
From: Lemke, Wesley Sent: Tuesday, March 22, 2005 12:55 PM
To: 'OJB Users List'
Subject: RE: Updating instead of Inserting


I am persisting the objects fine now, but I am getting an error when
retrieving:

[3/22/05 12:44:43:008 CST] 39432342 SystemOut     O [PersistentField]
ERROR: while set field: [try to set 'object value' in 'target object'
target obj class: model.client.NewClientGroup
target field name: clientRelationship
target field type: class model.client.ClientRelationship
object value class: model.client.NewClientGroup
object value: [EMAIL PROTECTED]
]

Here are the pertinent parts of repository.xml:

In the class-descriptor for ClientRelationship:
     <collection-descriptor
         name="clientGroups"
         element-class-ref="model.client.NewClientGroup"
         auto-delete="true"
         auto-update="true"
     >
         <inverse-foreignkey field-ref="clientRelationshipId" />
     </collection-descriptor>

In the class-descriptor for NewClientGroup:
<reference-descriptor name="clientRelationship"
class-ref="model.client.ClientRelationship">
<foreignkey field-ref="objectId"/>
</reference-descriptor> 

In the NewClientGroup Class:
    private ClientRelationship clientRelationship;  // with getter
and setter defined.

Here is the code I am running:

            Query q = new
QueryByCriteria(ClientRelationship.class);
            Collection clientRelationships =
broker.getCollectionByQuery(q); <-- exception thrown here.
            Iterator i = clientRelationships.iterator();

writer.println("<br><br>");
while (i.hasNext()) {
ClientRelationship cr2 =
(ClientRelationship) i.next();
writer.println(cr2.getNameOfApproverOfNoContract());
List clientGroups =
cr2.getClientGroups();
} 

I am assuming that when OJB pulls back the ClientRelationships, it is
also pulling back the collection of NewClientGroups (and Subgroups).
When it instantiates the NewClientGroup it is trying to set the
clientRelationship field.  Why is it trying to set it to a
NewClientGroup, instead of the associated ClientRelationship?

Here is the entire stack trace if it helps:

[3/22/05 12:44:42:998 CST] 39432342 SystemOut     O
[org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl] DEBUG:
SQL:SELECT
A0.CLASS_NAME,A0.client_grp_id,A0.INN_CLIENT_NB,A0.client_id,A0.LAST_MOD
IFIED_USER,A0.SDD_COMP_I,A0.LAST_NAME_DT,A0.ETL_CLIENT_ID,A0.KEY_WORDS,A
0.LAST_NAME,A0.MAIL_MEMBERS,A0.PRIMARY_GRP_I,A0.group_id,A0.COMMENTS,A0.
REPORTS_DESC,A0.EFF_DT,A0.NAME FROM client_group A0 WHERE ( A0.client_id
= ?) AND  (A0.CLASS_NAME = ?)
[3/22/05 12:44:43:078 CST] 39432342 SystemErr     R
org.apache.ojb.broker.metadata.MetadataException: IllegalAccess error
setting field:clientRelationship in object:model.client.NewClientGroup
    at
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.setValueFor(Unknown Source)
    at
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.set(Unknown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReference(Unknow
n Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReferences(Unkno
wn Source)
    at
org.apache.ojb.broker.accesslayer.RsIterator.getObjectFromResultSet(Unkn
own Source)
    at org.apache.ojb.broker.accesslayer.RsIterator.next(Unknown
Source)
    at
org.apache.ojb.broker.accesslayer.BasePrefetcher.prefetchRelationship(Un
known Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.performRetrievalTasks(Un
known Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(Un
known Source)
    at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
    at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
    at
servlets.InheritanceServlet.doPost(InheritanceServlet.java:79)
    at servlets.InheritanceServlet.doGet(InheritanceServlet.java:44)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictSe
rvletInstance.java:110)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLi
fecycleServlet.java:174)
    at
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycle
Servlet.java:313)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLif
ecycleServlet.java:116)
    at
com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.
java:283)
    at
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(Vali
dServletReferenceState.java:42)
    at
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Servle
tInstanceReference.java:40)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java:948)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java:530)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java:176)
    at
com.ibm.ws.webcontainer.servlet.InvokerServlet.service(InvokerServlet.ja
va:255)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictSe
rvletInstance.java:110)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLi
fecycleServlet.java:174)
    at
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycle
Servlet.java:313)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLif
ecycleServlet.java:116)
    at
com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.
java:283)
    at
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(Vali
dServletReferenceState.java:42)
    at
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Servle
tInstanceReference.java:40)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java:948)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java:530)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java:176)
    at
com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:7
9)
    at
com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInv
oker.java:201)
    at
com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocati
on(CachedInvocation.java:71)
    at
com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(Servle
tRequestProcessor.java:182)
    at
com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSELis
tener.java:334)
    at
com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection
.java:56)
    at
com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:
610)
    at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:431)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:593)
Caused by: java.lang.IllegalArgumentException: field type mismatch
    at java.lang.reflect.Field.set(Native Method)
    ... 49 more
[3/22/05 12:44:43:008 CST] 39432342 SystemOut     O [PersistentField]
ERROR: while set field: [try to set 'object value' in 'target object'
target obj class: model.client.NewClientGroup
target field name: clientRelationship
target field type: class model.client.ClientRelationship
object value class: model.client.NewClientGroup
object value: [EMAIL PROTECTED]
]
[3/22/05 12:44:47:865 CST] 39432342 WebGroup      E SRVE0026E: [Servlet
Error]-[servlets.InheritanceServlet]:
org.apache.ojb.broker.PersistenceBrokerException:
org.apache.ojb.broker.metadata.MetadataException: IllegalAccess error
setting field:clientRelationship in object:model.client.NewClientGroup
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(Un
known Source)
    at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
    at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
    at
servlets.InheritanceServlet.doPost(InheritanceServlet.java:79)
    at servlets.InheritanceServlet.doGet(InheritanceServlet.java:44)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictSe
rvletInstance.java:110)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLi
fecycleServlet.java:174)
    at
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycle
Servlet.java:313)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLif
ecycleServlet.java:116)
    at
com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.
java:283)
    at
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(Vali
dServletReferenceState.java:42)
    at
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Servle
tInstanceReference.java:40)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java:948)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java:530)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java:176)
    at
com.ibm.ws.webcontainer.servlet.InvokerServlet.service(InvokerServlet.ja
va:255)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictSe
rvletInstance.java:110)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLi
fecycleServlet.java:174)
    at
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycle
Servlet.java:313)
    at
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLif
ecycleServlet.java:116)
    at
com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.
java:283)
    at
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(Vali
dServletReferenceState.java:42)
    at
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Servle
tInstanceReference.java:40)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java:948)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java:530)
    at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java:176)
    at
com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:7
9)
    at
com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInv
oker.java:201)
    at
com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocati
on(CachedInvocation.java:71)
    at
com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(Servle
tRequestProcessor.java:182)
    at
com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSELis
tener.java:334)
    at
com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection
.java:56)
    at
com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:
610)
    at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:431)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:593)
Caused by: org.apache.ojb.broker.metadata.MetadataException:
IllegalAccess error setting field:clientRelationship in
object:model.client.NewClientGroup
    at
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.setValueFor(Unknown Source)
    at
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDirectAccessIm
plNew.set(Unknown Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReference(Unknow
n Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReferences(Unkno
wn Source)
    at
org.apache.ojb.broker.accesslayer.RsIterator.getObjectFromResultSet(Unkn
own Source)
    at org.apache.ojb.broker.accesslayer.RsIterator.next(Unknown
Source)
    at
org.apache.ojb.broker.accesslayer.BasePrefetcher.prefetchRelationship(Un
known Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.performRetrievalTasks(Un
known Source)
    at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unk
nown Source)
    ... 40 more
Caused by: java.lang.IllegalArgumentException: field type mismatch
    at java.lang.reflect.Field.set(Native Method)
    ... 49 more

-----Original Message-----
From: Armin Waibel [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 22, 2005 9:22 AM
To: OJB Users List
Subject: Re: Updating instead of Inserting


Lemke, Wesley wrote:

Thanks Armen, that worked. I've made this same mistake before, you would think I'd learn :)



...you are in good company, the history of mankind is an endless list of

repeated mistakes ;-)



The AdmObject will have many more extents in the full application.
Every persistent class will extend it, or a subclass of it. I only had one class extending it in this subset.



I ask this each time, because using inheritance can be a performance killer and should be avoided if possible. So if you don't regular need query for AdmObject's, don't declare the mapping.

Armin



-----Original Message-----
From: Armin Waibel [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 22, 2005 8:38 AM
To: OJB Users List
Subject: Re: Updating instead of Inserting


Hi Wes,

why did you need mapping for AdmObject when only one class "extent"
AdmObject?

In mapping for NCG

<collection-descriptor
         name="subgroups"
         element-class-ref="model.client.Subgroup"
         auto-delete="true"
         auto-update="true"
     >
         <inverse-foreignkey field-ref="objectId" />
     </collection-descriptor>

the inverse-foreignkey refer to the PK field of SG. Think this is not
correct, you need a FK field in SG to store the PK value of NCG. This



FK

field must also be used by the 'clientGroup' reference in SG [don't use an anomymous field, because of the 1:n relation http://db.apache.org/ojb/docu/guides/advanced-technique.html#How+do+
]

regards,
Armin



Lemke, Wesley wrote:


I have 4 classes:

AdmObject -- highlevel class that all of our persistent classes
extend. Contains objectId field. Generic Group -- Abstract. Extends AdmObject. Contains common fields for NewClientGroup and Subgroup and 



the ojbConcreteClass. NewClientGroup -- extends Generic Group,
contains a collection of Subgroups.
Subgroup -- extends Generic Group.  Has a reference to the
NewClientGroup.

I am trying to persist NewClientGroup and Subgroup (along with common
fields in Generic Group) to the same table. Here is a portion of my mapping document (most of the common fields from Generic group are removed to simplifiy):

<class-descriptor
    class="model.AdmObject">
    <extent-class class-ref="model.client.GenericGroup" />
</class-descriptor>

<class-descriptor
    class="model.client.GenericGroup">
    <extent-class class-ref="model.client.Subgroup" />
    <extent-class class-ref="model.client.NewClientGroup" />
</class-descriptor>

<class-descriptor
class="model.client.NewClientGroup"
table="client_group">
<field-descriptor
name="objectId"
column="group_id"
jdbc-type="INTEGER"
primarykey="true"
autoincrement="true"
access="readonly"
/>
<field-descriptor
name="internalClientNumber"
column="INN_CLIENT_NB"
jdbc-type="VARCHAR"
/>
<field-descriptor
name="ojbConcreteClass"
column="CLASS_NAME"
jdbc-type="VARCHAR"
/> <collection-descriptor
name="subgroups"
element-class-ref="model.client.Subgroup"
auto-delete="true"
auto-update="true"
>
<inverse-foreignkey field-ref="objectId" />
</collection-descriptor> </class-descriptor>
<class-descriptor
class="model.client.Subgroup"
table="client_group"
>
<field-descriptor
name="objectId"
column="group_id"
jdbc-type="INTEGER"
primarykey="true"
autoincrement="true"
access="readonly"
/>
<field-descriptor
name="name"
column="NAME"
jdbc-type="VARCHAR"
/> <field-descriptor
name="ojbConcreteClass"
column="CLASS_NAME"
jdbc-type="VARCHAR"
/> <reference-descriptor name="clientGroup"
class-ref="model.client.NewClientGroup">
<foreignkey field-ref="objectId"/>
</reference-descriptor> </class-descriptor>

Here is the code I am using:
            broker.beginTransaction();
            NewClientGroup ncg = new NewClientGroup();
            ncg.setInternalClientNumber("IntClntNbr");
            Subgroup sg = new Subgroup();
            sg.setName("FirstSubgroup");
            ncg.addSubgroup(sg);
            Subgroup sg2 = new Subgroup();
            sg.setName("Second Subgroup");
            ncg.addSubgroup(sg2);
            broker.store(ncg);
            broker.commitTransaction();

I would assume that after the above code, there would be one
NewClientGroup and 2 Subgroups in my client_group table. However, there is only one row, the Second Subgroup. Here is the debug SQL generated:

DEBUG: SQL:INSERT INTO client_group (INN_CLIENT_NB,CLASS_NAME) VALUES
(?,?)
DEBUG: SQL:UPDATE client_group SET NAME=?,CLASS_NAME=? WHERE group_id



=


?

Am I doing something wrong with my mapping or code? Is it possible to 



persist these classes to the same table?

Any help would be appreciated.

Thanks,
Wes

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