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Posted to users@openjpa.apache.org by Annette Scherer <an...@gmx.de> on 2009/03/06 22:38:22 UTC
ManagedInterfaces
Hello,
we have several problems using OpenJPA with managed interfaces.
I try to explain:
preconditions
1. we use the model below. Each interface is implemented by a class with
postfix Impl
2. we continuously use ManagedInterfaces
3. we use OpenJPAEntityManager.createInstance(Class) to instantiate objects
problems
1. when reading a kategorie object with openJPAEm.find(Kategorie.class,
String name) we get an openjpa object like this, which differs from our
implementations.
When trying to call a method of one of our implementations (for example
fetchDomainAssociation on ParameterListeAtomarImpl, we get this exception:
[05.03.09 15:34:29:796 CET] 00000020 SystemErr R
java.lang.UnsupportedOperationException
[05.03.09 15:34:29:812 CET] 00000020 SystemErr R at
de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl.fetchDo
mainAssociation(Unknown Source)
How can we avoid this problem? It is a killer argument for using JPA in our
applications, for using interfaces is a corporation wide paradigma.
2. another problem is the use of inheritance. With annotations we used for
Parameter, ParameterAtomar for example, we receive this exeption:
[04.03.09 14:17:47:004 CET] 00000021 SystemOut O [04 Mär 2009 14:17:46]
DEBUG [LifecycleImpl.java:259 -- phase] - afterPhase(RESTORE_VIEW
1,com.icesoft.faces.context.BridgeFacesContext@60ae60ae) threw exception:
<openjpa-1.2.0-r422266:683325 fatal user error>
org.apache.openjpa.persistence.ArgumentException: Discriminator value
"ATOMAR" is used for two different classes in the same inheritance tree:
"interface de.huk.vtp.selektionen.bo.ParameterAtomar",
"de.huk.vtp.selektionen.bo.ParameterAtomar" Discriminator value "ATOMAR" is
used for two different classes in the same inheritance tree: "interface
de.huk.vtp.selektionen.bo.ParameterAtomar",
"de.huk.vtp.selektionen.bo.ParameterAtomar"
<openjpa-1.2.0-r422266:683325 fatal user error>
org.apache.openjpa.persistence.ArgumentException: Discriminator value
"ATOMAR" is used for two different classes in the same inheritance tree:
"interface de.huk.vtp.selektionen.bo.ParameterAtomar",
"de.huk.vtp.selektionen.bo.ParameterAtomar"
at
org.apache.openjpa.jdbc.meta.strats.ValueMapDiscriminatorStrategy.mapDiscrim
inatorValue(ValueMapDiscriminatorStrategy.java:116)
Thanks for you´r advice
Annette Scherer
extract of our model:
@Entity
@Table(name="TAKATEGORIE")
@ManagedInterface
public interface Kategorie extends Serializable{
@Id
@Column(name="NAME", length=50)
public String getName();
public void setName(String newName);
@OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
public java.util.List<Typ> getTypListe();
public void setTypListe(java.util.List<Typ> newTypListe);
public void addToTypListe(Typ o);
public void removeFromTypListe(Typ o);
}
@Entity
@Table(name="TATYP")
@ManagedInterface
public interface Typ extends Serializable {
@Id
@Column(name="SELEKTIONSNUMMER", length=4)
public String getSelectionID();
public void setSelectionID(String newOperationId);
@Column(name="NAME", length=60)
public String getName();
public void setName(String newName);
@OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
public java.util.List<Parameter> getParameterListe();
public void setParameterListe(java.util.List<Parameter>
newParameterListe);
public void addToParameterListe(Parameter o);
public void removeFromParameterListe(Parameter o);
}
@Entity
@Table(name="TAPARAMETER")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="Typ", discriminatorType=DiscriminatorType.STRING)
@ManagedInterface
public interface Parameter extends Serializable{
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
public long getId();
public void setId(long newId);
@Column(name="KOMPONENTENTYP", length=50)
public String getKomponentenTyp();
public void setKomponentenTyp(String newKomponentenTyp);
}
@Entity(name="ATOMAR")
@ManagedInterface
public interface ParameterAtomar extends Parameter {
@Column(name="NAME", length=50)
public String getName();
public void setName(String newName);
@Column(name="BEZEICHNUNG", length=50)
public String getBezeichnung();
public void setBezeichnung(String bezeichnung);
}
@Entity
@ManagedInterface
public interface ParameterListeAtomar extends ParameterAtomar {
public String getInhalt();
public void setInhalt(String newInhalt);
public void addToListenWerte(String o);
public void removeFromListenWerte(String o);
public DomainAssociation fetchDomainAssociation();
}
public class KategorieImpl implements Kategorie, Serializable {
..............
}
public class TypImpl implements Typ, Serializable {
.............
}
public abstract class ParameterImpl implements Parameter, Serializable {
............
}
public abstract class ParameterAtomarImpl extends ParameterImpl implements
ParameterAtomar {
...........
}
public class ParameterListeAtomarImpl extends ParameterAtomarImpl implements
ParameterListeAtomar{
private String inhalt;
private List<String> listenWerte;
public ParameterListeAtomarImpl() {
}
private String getInhalt() {
return this.inhalt;
}
private void setInhalt(String newInhalt) {
this.inhalt = newInhalt;
// do something else
}
private java.util.List getListenWerte() {
return this.listenWerte;
}
private void setListenWerte(java.util.List newListenWerte) {
this.listenWerte = newListenWerte;
// do something else
}
public void addToListenWerte(String o) {
this.getListenWerte().add(o);
// do something else
}
public void removeFromListenWerte(String o) {
this.getListenWerte().remove(o);
// do something else }
public DomainAssociation fetchDomainAssociation(){
DomainAssociation da = //fetch a special object for further use
return da;
}
}
Re: AW: AW: AW: AW: ManagedInterfaces
Posted by Pinaki Poddar <pp...@apache.org>.
Hi,
You can try OpenJPA-specific @Type annotation to designate that a relation
is declared as interface but will be given a persistence capable instance at
runtime. In your model, for example,
public class KategorieImpl implements Kategorie, Serializable {
private String name;
@ElementType(javax.persistence.Entity.class) // tells OpenJPA that
elements of TypListe will be instances of Typ interface
private List<Typ> typListe;
However, I think the support for interface is somewhat broken currently
(at least I cannot get to work the way it used to) -- I will do some
investigation when I get some time.
Hi,
How exactly should this be done.
1. Annotate interfaces (as @ManagedInterface) a n d additionally
implementing classes (as @Entity)
or
2. Annotate only classes and not use ManagedInterfaces at all
To my experience the latter one would implicate that we cannot type class
attributes to interfaces. For example we now use
public class KategorieImpl implements Kategorie, Serializable {
private String name;
private List<Typ> typListe;
............
}
We would have to change List<Typ> into List<TypImpl>. Is this correct??
public class KategorieImpl implements Kategorie, Serializable {
private String name;
private List<TypImpl> typListe;
............
}
This would limit flexibility to change implementation behind an interface.
So, we depend on using interfaces.
In case of 2.
Is there another altenative to use JPA with the definitions above?
greetings
Annette Scherer
Abteilung Informatik
-----Ursprüngliche Nachricht-----
Von: Pinaki Poddar [mailto:ppoddar@apache.org]
Gesendet: Mittwoch, 11. März 2009 16:51
An: users@openjpa.apache.org
Betreff: Re: AW: AW: AW: ManagedInterfaces
Hi,
> We put the annotations only on Interfaces. (See examples below).
> Therefore we only inserted Interfaces > into persistence.xml.
1. As you require to invoke non-bean methods (e.g. fetchDomainData()) of
your implementation class, then you need to annotate them as @Entity.
2. You need to specify these implementation classes in persistence.xml
<class> clause
3. You need to instantiate these classes directly rather than calling
OpenJPAEntityManager.newInstance(InterfaceX.class), because otherwise
OpenJPA will not know that actually you want an instance of your
implementation class InterfaceXImpl and *not* a dynamically generated class
that implements InterfaceX.
> When inserting interface and implementing class into persistenc.xml, for
> example ParameterDatumAtomar
> and .ParameterDatumAtomarImpl we receive following Exception.
This exception is raised because ParameterDatumAtomarImpl is not annotated
as @Entity.
--
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http://n2.nabble.com/ManagedInterfaces-tp2438473p2462075.html
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--
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AW: AW: AW: AW: ManagedInterfaces
Posted by "Scherer, Annette" <An...@huk-coburg.de>.
Hi,
How exactly should this be done.
1. Annotate interfaces (as @ManagedInterface) a n d additionally implementing classes (as @Entity)
or
2. Annotate only classes and not use ManagedInterfaces at all
To my experience the latter one would implicate that we cannot type class attributes to interfaces. For example we now use
public class KategorieImpl implements Kategorie, Serializable {
private String name;
private List<Typ> typListe;
............
}
We would have to change List<Typ> into List<TypImpl>. Is this correct??
public class KategorieImpl implements Kategorie, Serializable {
private String name;
private List<TypImpl> typListe;
............
}
This would limit flexibility to change implementation behind an interface. So, we depend on using interfaces.
In case of 2.
Is there another altenative to use JPA with the definitions above?
greetings
Annette Scherer
Abteilung Informatik
-----Ursprüngliche Nachricht-----
Von: Pinaki Poddar [mailto:ppoddar@apache.org]
Gesendet: Mittwoch, 11. März 2009 16:51
An: users@openjpa.apache.org
Betreff: Re: AW: AW: AW: ManagedInterfaces
Hi,
> We put the annotations only on Interfaces. (See examples below).
> Therefore we only inserted Interfaces > into persistence.xml.
1. As you require to invoke non-bean methods (e.g. fetchDomainData()) of
your implementation class, then you need to annotate them as @Entity.
2. You need to specify these implementation classes in persistence.xml
<class> clause
3. You need to instantiate these classes directly rather than calling
OpenJPAEntityManager.newInstance(InterfaceX.class), because otherwise
OpenJPA will not know that actually you want an instance of your
implementation class InterfaceXImpl and *not* a dynamically generated class
that implements InterfaceX.
> When inserting interface and implementing class into persistenc.xml, for
> example ParameterDatumAtomar
> and .ParameterDatumAtomarImpl we receive following Exception.
This exception is raised because ParameterDatumAtomarImpl is not annotated
as @Entity.
--
View this message in context: http://n2.nabble.com/ManagedInterfaces-tp2438473p2462075.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: AW: AW: AW: ManagedInterfaces
Posted by Pinaki Poddar <pp...@apache.org>.
Hi,
> We put the annotations only on Interfaces. (See examples below).
> Therefore we only inserted Interfaces > into persistence.xml.
1. As you require to invoke non-bean methods (e.g. fetchDomainData()) of
your implementation class, then you need to annotate them as @Entity.
2. You need to specify these implementation classes in persistence.xml
<class> clause
3. You need to instantiate these classes directly rather than calling
OpenJPAEntityManager.newInstance(InterfaceX.class), because otherwise
OpenJPA will not know that actually you want an instance of your
implementation class InterfaceXImpl and *not* a dynamically generated class
that implements InterfaceX.
> When inserting interface and implementing class into persistenc.xml, for
> example ParameterDatumAtomar
> and .ParameterDatumAtomarImpl we receive following Exception.
This exception is raised because ParameterDatumAtomarImpl is not annotated
as @Entity.
--
View this message in context: http://n2.nabble.com/ManagedInterfaces-tp2438473p2462075.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
AW: AW: AW: ManagedInterfaces
Posted by "Scherer, Annette" <An...@huk-coburg.de>.
Here is my persistence.xml
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
version="1.0">
<persistence-unit name="Selektionen_DB">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<jta-data-source>java:comp/jdbc/selektionendb</jta-data-source>
<class>de.huk.vtp.selektionen.bo.Typ</class>
<class>de.huk.vtp.selektionen.bo.Kategorie</class>
<class>de.huk.vtp.selektionen.bo.Parameter</class>
<class>de.huk.vtp.selektionen.bo.ParameterAtomar</class>
<class>de.huk.vtp.selektionen.bo.ParameterTextAtomar</class
<class>de.huk.vtp.selektionen.bo.ParameterListeAtomar</class>
<properties>
<property name="openjpa.TransactionMode" value="managed"/>
<property name="openjpa.ConnectionFactoryMode" value="managed"/>
<property name="openjpa.jdbc.DBDictionary" value="db2"/>
<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema"/>
<property name="openjpa.Log" value="DefaultLevel=WARN, Runtime=INFO, Tool=INFO, SQL=TRACE"/>
</properties>
</persistence-unit>
</persistence>
We put the annotations only on Interfaces. (See examples below). Therefore we only inserted Interfaces into persistence.xml
When inserting interface and implementing class into persistenc.xml, for example ParameterDatumAtomar and .ParameterDatumAtomarImpl we receive following Exception.
[10.03.09 09:39:59:703 CET] 0000001e ExceptionUtil E CNTR0020E: EJB hat eine unerwartete (nicht deklarierte) Ausnahme beim Aufruf der Methode "testJPASelektion" für Bean "BeanId(Selektionen_JPA_EAR#Selektionen_JPA_EJB.jar#SelektionenJPATest, null)" ausgelöst. Ausnahmedaten: <openjpa-1.2.0-r422266:683325 fatal user error> org.apache.openjpa.persistence.ArgumentException: Type "class de.huk.vtp.selektionen.bo.ParameterDatumAtomarImpl" does not have persistence metadata.
at org.apache.openjpa.jdbc.meta.MappingTool.getMapping(MappingTool.java:682)
at org.apache.openjpa.jdbc.meta.MappingTool.buildSchema(MappingTool.java:748)
at org.apache.openjpa.jdbc.meta.MappingTool.run(MappingTool.java:646)
at org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory.synchronizeMappings(JDBCBrokerFactory.java:153)
at org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory.newBrokerImpl(JDBCBrokerFactory.java:119)
at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:189)
at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:142)
at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:192)
at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:145)
at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:56)
at de.huk.vtp.selektionen.bo.prototyp.InitNeu.getOpenEm(InitNeu.java:618)
at de.huk.vtp.selektionen.bo.prototyp.InitNeu.initErgebnisSpaltenMap(InitNeu.java:461)
at de.huk.vtp.selektionen.jpa.ejb.SelektionenJPATestBean.testJPASelektion(SelektionenJPATestBean.java:119)
at de.huk.vtp.selektionen.jpa.ejb.EJSRemoteStatelessSelektionenJPATest_b1c5ee64.testJPASelektion(EJSRemoteStatelessSelektionenJPATest_b1c5ee64.java:27)
at de.huk.vtp.selektionen.jpa.ejb._SelektionenJPATest_Stub.testJPASelektion(_SelektionenJPATest_Stub.java:264)
at de.huk.vtp.selektionen.jpa.web.SelektionenJPATestServlet.doWork(SelektionenJPATestServlet.java:46)
at de.huk.vtp.selektionen.jpa.web.SelektionenJPATestServlet.doGet(SelektionenJPATestServlet.java:34)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:463)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3129)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:238)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:811)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:93)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:274)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
at com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:194)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:741)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:863)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1510)
[10.03.09 09:39:59:781 CET] 0000001e ServiceLogger I com.ibm.ws.ffdc.IncidentStreamImpl initialize FFDC0009I: FFDC hat die Datenstromdatei C:\Programme\IBM\SDP70_1\runtimes\base_v61\profiles\AppSrv02\logs\ffdc\server1_43804380_09.03.10_09.39.59_0.txt für das Ereignis geöffnet.
[10.03.09 09:39:59:828 CET] 0000001e ServiceLogger I com.ibm.ws.ffdc.IncidentStreamImpl resetIncidentStream FFDC0010I: FFDC hat die Datenstromdatei C:\Programme\IBM\SDP70_1\runtimes\base_v61\profiles\AppSrv02\logs\ffdc\server1_43804380_09.03.10_09.39.59_0.txt für das Ereignis geschlossen.
[10.03.09 09:39:59:859 CET] 0000001e SystemOut O RemoteException occurred in server thread; nested exception is:
java.rmi.RemoteException: ; nested exception is:
<openjpa-1.2.0-r422266:683325 fatal user error> org.apache.openjpa.persistence.ArgumentException: Type "class de.huk.vtp.selektionen.bo.ParameterDatumAtomarImpl" does not have persistence metadata.
Annette Scherer
Abteilung Informatik
-----Ursprüngliche Nachricht-----
Von: Rick Curtis [mailto:curtisr7@gmail.com]
Gesendet: Montag, 9. März 2009 20:47
An: users@openjpa.apache.org
Betreff: Re: AW: AW: ManagedInterfaces
Annette -
Have you confirmed that de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl
has been enhanced?
-Rick
Scherer, Annette wrote:
>
> I call org.apache.openjpa.enhance.PCEnhancer
>
> Annette
>
>
> Annette Scherer
> Abteilung Informatik
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: Rick Curtis [mailto:curtisr7@gmail.com]
> Gesendet: Montag, 9. März 2009 14:24
> An: users@openjpa.apache.org
> Betreff: Re: AW: ManagedInterfaces
>
>
> Annette -
> How are you enhancing your Entities?
>
> -Rick
>
>
> Scherer, Annette wrote:
>>
>> Hi,
>>
>> unfortunately this approach does not lead to desired behaviour. When
>> instantiating our implemented class with ParameterListeAtomar pc = new
>> ParameterListeAtomarImpl(...) as suggested, we receive another error:
>>
>> Exception in thread "main" <openjpa-1.2.0-r422266:683325 nonfatal user
>> error> org.apache.openjpa.persistence.ArgumentException: Attempt to cast
>> instance "de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl@10e35d5" to
>> PersistenceCapable failed. Ensure that it has been enhanced.
>>
>>
>> This corresponds to Apache OpenJPA User's Gide
>> (http://openjpa.apache.org/builds/1.2.0/apache-openjpa-1.2.0/docs/manual/manual.html#ref_guide_pc_interfaces)
>>
>> What else can we do?
>>
>>
>> Greetings
>> Annette Scherer
>>
>>
>>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Pinaki Poddar [mailto:ppoddar@apache.org]
>> Gesendet: Sonntag, 8. März 2009 19:50
>> An: users@openjpa.apache.org
>> Betreff: Re: ManagedInterfaces
>>
>>
>> Hi,
>> > 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
>> objects
>>
>> This method will create a class *dynamically* which implements the
>> given
>> interface.
>> As the stacktrace shows, it has created a class named
>> 'de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl'.
>> But this dynamically generated class does not know what do when some
>> calls its fetchDomainAssociation() method on it and simply will throw
>> exception. It only knows how to behave for its bean-style get/set
>> methods.
>>
>> So, for this use case where you not only use ManagedInterface but also
>> have implemented these interfaces, you should instantiate your
>> implemented
>> class directly i.e.
>> ParameterListeAtomar pc = new ParameterListeAtomarImpl(...);
>>
>> You can continue using the interface for find() or query such as
>> ParameterListeAtomar pc = em.find(ParameterListeAtomar.class, someId);
>> This should return you an instance of ParameterListeAtomarImpl which
>> has
>> the correct implementation of fetchDomainAssociation().
>>
>>
>>
>>
>>
>> Annette Scherer wrote:
>>>
>>> Hello,
>>>
>>> we have several problems using OpenJPA with managed interfaces.
>>> I try to explain:
>>>
>>> preconditions
>>> 1. we use the model below. Each interface is implemented by a class with
>>> postfix Impl
>>> 2. we continuously use ManagedInterfaces
>>> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
>>> objects
>>>
>>>
>>> problems
>>> 1. when reading a kategorie object with openJPAEm.find(Kategorie.class,
>>> String name) we get an openjpa object like this, which differs from our
>>> implementations.
>>>
>>>
>>>
>>> When trying to call a method of one of our implementations (for example
>>> fetchDomainAssociation on ParameterListeAtomarImpl, we get this
>>> exception:
>>> [05.03.09 15:34:29:796 CET] 00000020 SystemErr R
>>> java.lang.UnsupportedOperationException
>>> [05.03.09 15:34:29:812 CET] 00000020 SystemErr R at
>>> de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl.fetchDo
>>> mainAssociation(Unknown Source)
>>>
>>> How can we avoid this problem? It is a killer argument for using JPA in
>>> our
>>> applications, for using interfaces is a corporation wide paradigma.
>>>
>>>
>>>
>>> 2. another problem is the use of inheritance. With annotations we used
>>> for
>>> Parameter, ParameterAtomar for example, we receive this exeption:
>>> [04.03.09 14:17:47:004 CET] 00000021 SystemOut O [04 Mär 2009 14:17:46]
>>> DEBUG [LifecycleImpl.java:259 -- phase] - afterPhase(RESTORE_VIEW
>>> 1,com.icesoft.faces.context.BridgeFacesContext@60ae60ae) threw
>>> exception:
>>> <openjpa-1.2.0-r422266:683325 fatal user error>
>>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>>> "ATOMAR" is used for two different classes in the same inheritance tree:
>>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>>> "de.huk.vtp.selektionen.bo.ParameterAtomar" Discriminator value "ATOMAR"
>>> is
>>> used for two different classes in the same inheritance tree: "interface
>>> de.huk.vtp.selektionen.bo.ParameterAtomar",
>>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>>
>>> <openjpa-1.2.0-r422266:683325 fatal user error>
>>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>>> "ATOMAR" is used for two different classes in the same inheritance tree:
>>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>>
>>> at
>>> org.apache.openjpa.jdbc.meta.strats.ValueMapDiscriminatorStrategy.mapDiscrim
>>> inatorValue(ValueMapDiscriminatorStrategy.java:116)
>>>
>>> Thanks for you´r advice
>>>
>>> Annette Scherer
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> extract of our model:
>>>
>>> @Entity
>>> @Table(name="TAKATEGORIE")
>>> @ManagedInterface
>>> public interface Kategorie extends Serializable{
>>> @Id
>>> @Column(name="NAME", length=50)
>>> public String getName();
>>> public void setName(String newName);
>>>
>>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>>> public java.util.List<Typ> getTypListe();
>>> public void setTypListe(java.util.List<Typ> newTypListe);
>>>
>>> public void addToTypListe(Typ o);
>>> public void removeFromTypListe(Typ o);
>>> }
>>>
>>>
>>> @Entity
>>> @Table(name="TATYP")
>>> @ManagedInterface
>>> public interface Typ extends Serializable {
>>> @Id
>>> @Column(name="SELEKTIONSNUMMER", length=4)
>>> public String getSelectionID();
>>> public void setSelectionID(String newOperationId);
>>>
>>> @Column(name="NAME", length=60)
>>> public String getName();
>>> public void setName(String newName);
>>>
>>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>>> public java.util.List<Parameter> getParameterListe();
>>> public void setParameterListe(java.util.List<Parameter>
>>> newParameterListe);
>>>
>>> public void addToParameterListe(Parameter o);
>>> public void removeFromParameterListe(Parameter o);
>>> }
>>>
>>>
>>> @Entity
>>> @Table(name="TAPARAMETER")
>>> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
>>> @DiscriminatorColumn(name="Typ",
>>> discriminatorType=DiscriminatorType.STRING)
>>> @ManagedInterface
>>> public interface Parameter extends Serializable{
>>> @Id
>>> @GeneratedValue(strategy=GenerationType.IDENTITY)
>>> public long getId();
>>> public void setId(long newId);
>>>
>>> @Column(name="KOMPONENTENTYP", length=50)
>>> public String getKomponentenTyp();
>>> public void setKomponentenTyp(String newKomponentenTyp);
>>> }
>>>
>>>
>>> @Entity(name="ATOMAR")
>>> @ManagedInterface
>>> public interface ParameterAtomar extends Parameter {
>>>
>>> @Column(name="NAME", length=50)
>>> public String getName();
>>> public void setName(String newName);
>>>
>>> @Column(name="BEZEICHNUNG", length=50)
>>> public String getBezeichnung();
>>> public void setBezeichnung(String bezeichnung);
>>> }
>>>
>>> @Entity
>>> @ManagedInterface
>>> public interface ParameterListeAtomar extends ParameterAtomar {
>>> public String getInhalt();
>>> public void setInhalt(String newInhalt);
>>>
>>> public void addToListenWerte(String o);
>>> public void removeFromListenWerte(String o);
>>>
>>> public DomainAssociation fetchDomainAssociation();
>>> }
>>>
>>> public class KategorieImpl implements Kategorie, Serializable {
>>> ..............
>>> }
>>>
>>> public class TypImpl implements Typ, Serializable {
>>> .............
>>> }
>>>
>>> public abstract class ParameterImpl implements Parameter, Serializable {
>>> ............
>>> }
>>>
>>> public abstract class ParameterAtomarImpl extends ParameterImpl
>>> implements
>>> ParameterAtomar {
>>> ...........
>>> }
>>>
>>>
>>> public class ParameterListeAtomarImpl extends ParameterAtomarImpl
>>> implements
>>> ParameterListeAtomar{
>>> private String inhalt;
>>> private List<String> listenWerte;
>>>
>>> public ParameterListeAtomarImpl() {
>>> }
>>>
>>> private String getInhalt() {
>>> return this.inhalt;
>>> }
>>>
>>> private void setInhalt(String newInhalt) {
>>> this.inhalt = newInhalt;
>>> // do something else
>>> }
>>>
>>> private java.util.List getListenWerte() {
>>> return this.listenWerte;
>>> }
>>>
>>> private void setListenWerte(java.util.List newListenWerte) {
>>> this.listenWerte = newListenWerte;
>>> // do something else
>>> }
>>>
>>> public void addToListenWerte(String o) {
>>> this.getListenWerte().add(o);
>>> // do something else
>>> }
>>>
>>> public void removeFromListenWerte(String o) {
>>> this.getListenWerte().remove(o);
>>> // do something else }
>>>
>>>
>>> public DomainAssociation fetchDomainAssociation(){
>>> DomainAssociation da = //fetch a special object for further use
>>> return da;
>>> }
>>> }
>>>
>>>
>>>
>>>
>>>
>>>
>>
>> --
>> View this message in context:
>> http://n2.nabble.com/ManagedInterfaces-tp2438473p2445629.html
>> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>>
>>
>>
>
> --
> View this message in context:
> http://n2.nabble.com/ManagedInterfaces-tp2438473p2448900.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>
>
>
--
View this message in context: http://n2.nabble.com/ManagedInterfaces-tp2438473p2451233.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: AW: AW: ManagedInterfaces
Posted by Rick Curtis <cu...@gmail.com>.
Annette -
Have you confirmed that de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl
has been enhanced?
-Rick
Scherer, Annette wrote:
>
> I call org.apache.openjpa.enhance.PCEnhancer
>
> Annette
>
>
> Annette Scherer
> Abteilung Informatik
>
> HUK-COBURG
> Bahnhofsplatz
> 96444 Coburg
> Telefon 09561 96-1718
> Telefax 09561 96-3671
> E-Mail Annette.Scherer@HUK-COBURG.de
> Internet www.HUK.de
> =============================================================
> HUK-COBURG Haftpflicht-Unterstützungs-Kasse kraftfahrender Beamter
> Deutschlands a. G. in Coburg
> Reg.-Gericht Coburg HRB 100; St.-Nr. 9212/101/00021
> Sitz der Gesellschaft: Bahnhofsplatz, 96444 Coburg
> Vorsitzender des Aufsichtsrats: Werner Strohmayr.
> Vorstand: Rolf-Peter Hoenen (Sprecher), Wolfgang Flaßhoff, Stefan
> Gronbach, Klaus-Jürgen Heitmann, Dr. Christian Hofer, Dr. Wolfgang Weiler.
> =============================================================
>
>
> -----Ursprüngliche Nachricht-----
> Von: Rick Curtis [mailto:curtisr7@gmail.com]
> Gesendet: Montag, 9. März 2009 14:24
> An: users@openjpa.apache.org
> Betreff: Re: AW: ManagedInterfaces
>
>
> Annette -
> How are you enhancing your Entities?
>
> -Rick
>
>
> Scherer, Annette wrote:
>>
>> Hi,
>>
>> unfortunately this approach does not lead to desired behaviour. When
>> instantiating our implemented class with ParameterListeAtomar pc = new
>> ParameterListeAtomarImpl(...) as suggested, we receive another error:
>>
>> Exception in thread "main" <openjpa-1.2.0-r422266:683325 nonfatal user
>> error> org.apache.openjpa.persistence.ArgumentException: Attempt to cast
>> instance "de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl@10e35d5" to
>> PersistenceCapable failed. Ensure that it has been enhanced.
>>
>>
>> This corresponds to Apache OpenJPA User's Gide
>> (http://openjpa.apache.org/builds/1.2.0/apache-openjpa-1.2.0/docs/manual/manual.html#ref_guide_pc_interfaces)
>>
>> What else can we do?
>>
>>
>> Greetings
>> Annette Scherer
>>
>>
>>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Pinaki Poddar [mailto:ppoddar@apache.org]
>> Gesendet: Sonntag, 8. März 2009 19:50
>> An: users@openjpa.apache.org
>> Betreff: Re: ManagedInterfaces
>>
>>
>> Hi,
>> > 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
>> objects
>>
>> This method will create a class *dynamically* which implements the
>> given
>> interface.
>> As the stacktrace shows, it has created a class named
>> 'de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl'.
>> But this dynamically generated class does not know what do when some
>> calls its fetchDomainAssociation() method on it and simply will throw
>> exception. It only knows how to behave for its bean-style get/set
>> methods.
>>
>> So, for this use case where you not only use ManagedInterface but also
>> have implemented these interfaces, you should instantiate your
>> implemented
>> class directly i.e.
>> ParameterListeAtomar pc = new ParameterListeAtomarImpl(...);
>>
>> You can continue using the interface for find() or query such as
>> ParameterListeAtomar pc = em.find(ParameterListeAtomar.class, someId);
>> This should return you an instance of ParameterListeAtomarImpl which
>> has
>> the correct implementation of fetchDomainAssociation().
>>
>>
>>
>>
>>
>> Annette Scherer wrote:
>>>
>>> Hello,
>>>
>>> we have several problems using OpenJPA with managed interfaces.
>>> I try to explain:
>>>
>>> preconditions
>>> 1. we use the model below. Each interface is implemented by a class with
>>> postfix Impl
>>> 2. we continuously use ManagedInterfaces
>>> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
>>> objects
>>>
>>>
>>> problems
>>> 1. when reading a kategorie object with openJPAEm.find(Kategorie.class,
>>> String name) we get an openjpa object like this, which differs from our
>>> implementations.
>>>
>>>
>>>
>>> When trying to call a method of one of our implementations (for example
>>> fetchDomainAssociation on ParameterListeAtomarImpl, we get this
>>> exception:
>>> [05.03.09 15:34:29:796 CET] 00000020 SystemErr R
>>> java.lang.UnsupportedOperationException
>>> [05.03.09 15:34:29:812 CET] 00000020 SystemErr R at
>>> de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl.fetchDo
>>> mainAssociation(Unknown Source)
>>>
>>> How can we avoid this problem? It is a killer argument for using JPA in
>>> our
>>> applications, for using interfaces is a corporation wide paradigma.
>>>
>>>
>>>
>>> 2. another problem is the use of inheritance. With annotations we used
>>> for
>>> Parameter, ParameterAtomar for example, we receive this exeption:
>>> [04.03.09 14:17:47:004 CET] 00000021 SystemOut O [04 Mär 2009 14:17:46]
>>> DEBUG [LifecycleImpl.java:259 -- phase] - afterPhase(RESTORE_VIEW
>>> 1,com.icesoft.faces.context.BridgeFacesContext@60ae60ae) threw
>>> exception:
>>> <openjpa-1.2.0-r422266:683325 fatal user error>
>>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>>> "ATOMAR" is used for two different classes in the same inheritance tree:
>>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>>> "de.huk.vtp.selektionen.bo.ParameterAtomar" Discriminator value "ATOMAR"
>>> is
>>> used for two different classes in the same inheritance tree: "interface
>>> de.huk.vtp.selektionen.bo.ParameterAtomar",
>>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>>
>>> <openjpa-1.2.0-r422266:683325 fatal user error>
>>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>>> "ATOMAR" is used for two different classes in the same inheritance tree:
>>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>>
>>> at
>>> org.apache.openjpa.jdbc.meta.strats.ValueMapDiscriminatorStrategy.mapDiscrim
>>> inatorValue(ValueMapDiscriminatorStrategy.java:116)
>>>
>>> Thanks for you´r advice
>>>
>>> Annette Scherer
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> extract of our model:
>>>
>>> @Entity
>>> @Table(name="TAKATEGORIE")
>>> @ManagedInterface
>>> public interface Kategorie extends Serializable{
>>> @Id
>>> @Column(name="NAME", length=50)
>>> public String getName();
>>> public void setName(String newName);
>>>
>>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>>> public java.util.List<Typ> getTypListe();
>>> public void setTypListe(java.util.List<Typ> newTypListe);
>>>
>>> public void addToTypListe(Typ o);
>>> public void removeFromTypListe(Typ o);
>>> }
>>>
>>>
>>> @Entity
>>> @Table(name="TATYP")
>>> @ManagedInterface
>>> public interface Typ extends Serializable {
>>> @Id
>>> @Column(name="SELEKTIONSNUMMER", length=4)
>>> public String getSelectionID();
>>> public void setSelectionID(String newOperationId);
>>>
>>> @Column(name="NAME", length=60)
>>> public String getName();
>>> public void setName(String newName);
>>>
>>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>>> public java.util.List<Parameter> getParameterListe();
>>> public void setParameterListe(java.util.List<Parameter>
>>> newParameterListe);
>>>
>>> public void addToParameterListe(Parameter o);
>>> public void removeFromParameterListe(Parameter o);
>>> }
>>>
>>>
>>> @Entity
>>> @Table(name="TAPARAMETER")
>>> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
>>> @DiscriminatorColumn(name="Typ",
>>> discriminatorType=DiscriminatorType.STRING)
>>> @ManagedInterface
>>> public interface Parameter extends Serializable{
>>> @Id
>>> @GeneratedValue(strategy=GenerationType.IDENTITY)
>>> public long getId();
>>> public void setId(long newId);
>>>
>>> @Column(name="KOMPONENTENTYP", length=50)
>>> public String getKomponentenTyp();
>>> public void setKomponentenTyp(String newKomponentenTyp);
>>> }
>>>
>>>
>>> @Entity(name="ATOMAR")
>>> @ManagedInterface
>>> public interface ParameterAtomar extends Parameter {
>>>
>>> @Column(name="NAME", length=50)
>>> public String getName();
>>> public void setName(String newName);
>>>
>>> @Column(name="BEZEICHNUNG", length=50)
>>> public String getBezeichnung();
>>> public void setBezeichnung(String bezeichnung);
>>> }
>>>
>>> @Entity
>>> @ManagedInterface
>>> public interface ParameterListeAtomar extends ParameterAtomar {
>>> public String getInhalt();
>>> public void setInhalt(String newInhalt);
>>>
>>> public void addToListenWerte(String o);
>>> public void removeFromListenWerte(String o);
>>>
>>> public DomainAssociation fetchDomainAssociation();
>>> }
>>>
>>> public class KategorieImpl implements Kategorie, Serializable {
>>> ..............
>>> }
>>>
>>> public class TypImpl implements Typ, Serializable {
>>> .............
>>> }
>>>
>>> public abstract class ParameterImpl implements Parameter, Serializable {
>>> ............
>>> }
>>>
>>> public abstract class ParameterAtomarImpl extends ParameterImpl
>>> implements
>>> ParameterAtomar {
>>> ...........
>>> }
>>>
>>>
>>> public class ParameterListeAtomarImpl extends ParameterAtomarImpl
>>> implements
>>> ParameterListeAtomar{
>>> private String inhalt;
>>> private List<String> listenWerte;
>>>
>>> public ParameterListeAtomarImpl() {
>>> }
>>>
>>> private String getInhalt() {
>>> return this.inhalt;
>>> }
>>>
>>> private void setInhalt(String newInhalt) {
>>> this.inhalt = newInhalt;
>>> // do something else
>>> }
>>>
>>> private java.util.List getListenWerte() {
>>> return this.listenWerte;
>>> }
>>>
>>> private void setListenWerte(java.util.List newListenWerte) {
>>> this.listenWerte = newListenWerte;
>>> // do something else
>>> }
>>>
>>> public void addToListenWerte(String o) {
>>> this.getListenWerte().add(o);
>>> // do something else
>>> }
>>>
>>> public void removeFromListenWerte(String o) {
>>> this.getListenWerte().remove(o);
>>> // do something else }
>>>
>>>
>>> public DomainAssociation fetchDomainAssociation(){
>>> DomainAssociation da = //fetch a special object for further use
>>> return da;
>>> }
>>> }
>>>
>>>
>>>
>>>
>>>
>>>
>>
>> --
>> View this message in context:
>> http://n2.nabble.com/ManagedInterfaces-tp2438473p2445629.html
>> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>>
>>
>>
>
> --
> View this message in context:
> http://n2.nabble.com/ManagedInterfaces-tp2438473p2448900.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>
>
>
--
View this message in context: http://n2.nabble.com/ManagedInterfaces-tp2438473p2451233.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
AW: AW: ManagedInterfaces
Posted by "Scherer, Annette" <An...@huk-coburg.de>.
I call org.apache.openjpa.enhance.PCEnhancer
Annette
Annette Scherer
Abteilung Informatik
HUK-COBURG
Bahnhofsplatz
96444 Coburg
Telefon 09561 96-1718
Telefax 09561 96-3671
E-Mail Annette.Scherer@HUK-COBURG.de
Internet www.HUK.de
=============================================================
HUK-COBURG Haftpflicht-Unterstützungs-Kasse kraftfahrender Beamter Deutschlands a. G. in Coburg
Reg.-Gericht Coburg HRB 100; St.-Nr. 9212/101/00021
Sitz der Gesellschaft: Bahnhofsplatz, 96444 Coburg
Vorsitzender des Aufsichtsrats: Werner Strohmayr.
Vorstand: Rolf-Peter Hoenen (Sprecher), Wolfgang Flaßhoff, Stefan Gronbach, Klaus-Jürgen Heitmann, Dr. Christian Hofer, Dr. Wolfgang Weiler.
=============================================================
-----Ursprüngliche Nachricht-----
Von: Rick Curtis [mailto:curtisr7@gmail.com]
Gesendet: Montag, 9. März 2009 14:24
An: users@openjpa.apache.org
Betreff: Re: AW: ManagedInterfaces
Annette -
How are you enhancing your Entities?
-Rick
Scherer, Annette wrote:
>
> Hi,
>
> unfortunately this approach does not lead to desired behaviour. When
> instantiating our implemented class with ParameterListeAtomar pc = new
> ParameterListeAtomarImpl(...) as suggested, we receive another error:
>
> Exception in thread "main" <openjpa-1.2.0-r422266:683325 nonfatal user
> error> org.apache.openjpa.persistence.ArgumentException: Attempt to cast
> instance "de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl@10e35d5" to
> PersistenceCapable failed. Ensure that it has been enhanced.
>
>
> This corresponds to Apache OpenJPA User's Gide
> (http://openjpa.apache.org/builds/1.2.0/apache-openjpa-1.2.0/docs/manual/manual.html#ref_guide_pc_interfaces)
>
> What else can we do?
>
>
> Greetings
> Annette Scherer
>
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: Pinaki Poddar [mailto:ppoddar@apache.org]
> Gesendet: Sonntag, 8. März 2009 19:50
> An: users@openjpa.apache.org
> Betreff: Re: ManagedInterfaces
>
>
> Hi,
> > 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
> objects
>
> This method will create a class *dynamically* which implements the
> given
> interface.
> As the stacktrace shows, it has created a class named
> 'de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl'.
> But this dynamically generated class does not know what do when some
> calls its fetchDomainAssociation() method on it and simply will throw
> exception. It only knows how to behave for its bean-style get/set methods.
>
> So, for this use case where you not only use ManagedInterface but also
> have implemented these interfaces, you should instantiate your implemented
> class directly i.e.
> ParameterListeAtomar pc = new ParameterListeAtomarImpl(...);
>
> You can continue using the interface for find() or query such as
> ParameterListeAtomar pc = em.find(ParameterListeAtomar.class, someId);
> This should return you an instance of ParameterListeAtomarImpl which has
> the correct implementation of fetchDomainAssociation().
>
>
>
>
>
> Annette Scherer wrote:
>>
>> Hello,
>>
>> we have several problems using OpenJPA with managed interfaces.
>> I try to explain:
>>
>> preconditions
>> 1. we use the model below. Each interface is implemented by a class with
>> postfix Impl
>> 2. we continuously use ManagedInterfaces
>> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
>> objects
>>
>>
>> problems
>> 1. when reading a kategorie object with openJPAEm.find(Kategorie.class,
>> String name) we get an openjpa object like this, which differs from our
>> implementations.
>>
>>
>>
>> When trying to call a method of one of our implementations (for example
>> fetchDomainAssociation on ParameterListeAtomarImpl, we get this
>> exception:
>> [05.03.09 15:34:29:796 CET] 00000020 SystemErr R
>> java.lang.UnsupportedOperationException
>> [05.03.09 15:34:29:812 CET] 00000020 SystemErr R at
>> de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl.fetchDo
>> mainAssociation(Unknown Source)
>>
>> How can we avoid this problem? It is a killer argument for using JPA in
>> our
>> applications, for using interfaces is a corporation wide paradigma.
>>
>>
>>
>> 2. another problem is the use of inheritance. With annotations we used
>> for
>> Parameter, ParameterAtomar for example, we receive this exeption:
>> [04.03.09 14:17:47:004 CET] 00000021 SystemOut O [04 Mär 2009 14:17:46]
>> DEBUG [LifecycleImpl.java:259 -- phase] - afterPhase(RESTORE_VIEW
>> 1,com.icesoft.faces.context.BridgeFacesContext@60ae60ae) threw exception:
>> <openjpa-1.2.0-r422266:683325 fatal user error>
>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>> "ATOMAR" is used for two different classes in the same inheritance tree:
>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar" Discriminator value "ATOMAR"
>> is
>> used for two different classes in the same inheritance tree: "interface
>> de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>
>> <openjpa-1.2.0-r422266:683325 fatal user error>
>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>> "ATOMAR" is used for two different classes in the same inheritance tree:
>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>
>> at
>> org.apache.openjpa.jdbc.meta.strats.ValueMapDiscriminatorStrategy.mapDiscrim
>> inatorValue(ValueMapDiscriminatorStrategy.java:116)
>>
>> Thanks for you´r advice
>>
>> Annette Scherer
>>
>>
>>
>>
>>
>>
>>
>>
>> extract of our model:
>>
>> @Entity
>> @Table(name="TAKATEGORIE")
>> @ManagedInterface
>> public interface Kategorie extends Serializable{
>> @Id
>> @Column(name="NAME", length=50)
>> public String getName();
>> public void setName(String newName);
>>
>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>> public java.util.List<Typ> getTypListe();
>> public void setTypListe(java.util.List<Typ> newTypListe);
>>
>> public void addToTypListe(Typ o);
>> public void removeFromTypListe(Typ o);
>> }
>>
>>
>> @Entity
>> @Table(name="TATYP")
>> @ManagedInterface
>> public interface Typ extends Serializable {
>> @Id
>> @Column(name="SELEKTIONSNUMMER", length=4)
>> public String getSelectionID();
>> public void setSelectionID(String newOperationId);
>>
>> @Column(name="NAME", length=60)
>> public String getName();
>> public void setName(String newName);
>>
>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>> public java.util.List<Parameter> getParameterListe();
>> public void setParameterListe(java.util.List<Parameter>
>> newParameterListe);
>>
>> public void addToParameterListe(Parameter o);
>> public void removeFromParameterListe(Parameter o);
>> }
>>
>>
>> @Entity
>> @Table(name="TAPARAMETER")
>> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
>> @DiscriminatorColumn(name="Typ",
>> discriminatorType=DiscriminatorType.STRING)
>> @ManagedInterface
>> public interface Parameter extends Serializable{
>> @Id
>> @GeneratedValue(strategy=GenerationType.IDENTITY)
>> public long getId();
>> public void setId(long newId);
>>
>> @Column(name="KOMPONENTENTYP", length=50)
>> public String getKomponentenTyp();
>> public void setKomponentenTyp(String newKomponentenTyp);
>> }
>>
>>
>> @Entity(name="ATOMAR")
>> @ManagedInterface
>> public interface ParameterAtomar extends Parameter {
>>
>> @Column(name="NAME", length=50)
>> public String getName();
>> public void setName(String newName);
>>
>> @Column(name="BEZEICHNUNG", length=50)
>> public String getBezeichnung();
>> public void setBezeichnung(String bezeichnung);
>> }
>>
>> @Entity
>> @ManagedInterface
>> public interface ParameterListeAtomar extends ParameterAtomar {
>> public String getInhalt();
>> public void setInhalt(String newInhalt);
>>
>> public void addToListenWerte(String o);
>> public void removeFromListenWerte(String o);
>>
>> public DomainAssociation fetchDomainAssociation();
>> }
>>
>> public class KategorieImpl implements Kategorie, Serializable {
>> ..............
>> }
>>
>> public class TypImpl implements Typ, Serializable {
>> .............
>> }
>>
>> public abstract class ParameterImpl implements Parameter, Serializable {
>> ............
>> }
>>
>> public abstract class ParameterAtomarImpl extends ParameterImpl
>> implements
>> ParameterAtomar {
>> ...........
>> }
>>
>>
>> public class ParameterListeAtomarImpl extends ParameterAtomarImpl
>> implements
>> ParameterListeAtomar{
>> private String inhalt;
>> private List<String> listenWerte;
>>
>> public ParameterListeAtomarImpl() {
>> }
>>
>> private String getInhalt() {
>> return this.inhalt;
>> }
>>
>> private void setInhalt(String newInhalt) {
>> this.inhalt = newInhalt;
>> // do something else
>> }
>>
>> private java.util.List getListenWerte() {
>> return this.listenWerte;
>> }
>>
>> private void setListenWerte(java.util.List newListenWerte) {
>> this.listenWerte = newListenWerte;
>> // do something else
>> }
>>
>> public void addToListenWerte(String o) {
>> this.getListenWerte().add(o);
>> // do something else
>> }
>>
>> public void removeFromListenWerte(String o) {
>> this.getListenWerte().remove(o);
>> // do something else }
>>
>>
>> public DomainAssociation fetchDomainAssociation(){
>> DomainAssociation da = //fetch a special object for further use
>> return da;
>> }
>> }
>>
>>
>>
>>
>>
>>
>
> --
> View this message in context:
> http://n2.nabble.com/ManagedInterfaces-tp2438473p2445629.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>
>
>
--
View this message in context: http://n2.nabble.com/ManagedInterfaces-tp2438473p2448900.html
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Re: AW: ManagedInterfaces
Posted by Rick Curtis <cu...@gmail.com>.
Annette -
How are you enhancing your Entities?
-Rick
Scherer, Annette wrote:
>
> Hi,
>
> unfortunately this approach does not lead to desired behaviour. When
> instantiating our implemented class with ParameterListeAtomar pc = new
> ParameterListeAtomarImpl(...) as suggested, we receive another error:
>
> Exception in thread "main" <openjpa-1.2.0-r422266:683325 nonfatal user
> error> org.apache.openjpa.persistence.ArgumentException: Attempt to cast
> instance "de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl@10e35d5" to
> PersistenceCapable failed. Ensure that it has been enhanced.
>
>
> This corresponds to Apache OpenJPA User's Gide
> (http://openjpa.apache.org/builds/1.2.0/apache-openjpa-1.2.0/docs/manual/manual.html#ref_guide_pc_interfaces)
>
> What else can we do?
>
>
> Greetings
> Annette Scherer
>
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: Pinaki Poddar [mailto:ppoddar@apache.org]
> Gesendet: Sonntag, 8. März 2009 19:50
> An: users@openjpa.apache.org
> Betreff: Re: ManagedInterfaces
>
>
> Hi,
> > 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
> objects
>
> This method will create a class *dynamically* which implements the
> given
> interface.
> As the stacktrace shows, it has created a class named
> 'de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl'.
> But this dynamically generated class does not know what do when some
> calls its fetchDomainAssociation() method on it and simply will throw
> exception. It only knows how to behave for its bean-style get/set methods.
>
> So, for this use case where you not only use ManagedInterface but also
> have implemented these interfaces, you should instantiate your implemented
> class directly i.e.
> ParameterListeAtomar pc = new ParameterListeAtomarImpl(...);
>
> You can continue using the interface for find() or query such as
> ParameterListeAtomar pc = em.find(ParameterListeAtomar.class, someId);
> This should return you an instance of ParameterListeAtomarImpl which has
> the correct implementation of fetchDomainAssociation().
>
>
>
>
>
> Annette Scherer wrote:
>>
>> Hello,
>>
>> we have several problems using OpenJPA with managed interfaces.
>> I try to explain:
>>
>> preconditions
>> 1. we use the model below. Each interface is implemented by a class with
>> postfix Impl
>> 2. we continuously use ManagedInterfaces
>> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
>> objects
>>
>>
>> problems
>> 1. when reading a kategorie object with openJPAEm.find(Kategorie.class,
>> String name) we get an openjpa object like this, which differs from our
>> implementations.
>>
>>
>>
>> When trying to call a method of one of our implementations (for example
>> fetchDomainAssociation on ParameterListeAtomarImpl, we get this
>> exception:
>> [05.03.09 15:34:29:796 CET] 00000020 SystemErr R
>> java.lang.UnsupportedOperationException
>> [05.03.09 15:34:29:812 CET] 00000020 SystemErr R at
>> de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl.fetchDo
>> mainAssociation(Unknown Source)
>>
>> How can we avoid this problem? It is a killer argument for using JPA in
>> our
>> applications, for using interfaces is a corporation wide paradigma.
>>
>>
>>
>> 2. another problem is the use of inheritance. With annotations we used
>> for
>> Parameter, ParameterAtomar for example, we receive this exeption:
>> [04.03.09 14:17:47:004 CET] 00000021 SystemOut O [04 Mär 2009 14:17:46]
>> DEBUG [LifecycleImpl.java:259 -- phase] - afterPhase(RESTORE_VIEW
>> 1,com.icesoft.faces.context.BridgeFacesContext@60ae60ae) threw exception:
>> <openjpa-1.2.0-r422266:683325 fatal user error>
>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>> "ATOMAR" is used for two different classes in the same inheritance tree:
>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar" Discriminator value "ATOMAR"
>> is
>> used for two different classes in the same inheritance tree: "interface
>> de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>
>> <openjpa-1.2.0-r422266:683325 fatal user error>
>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>> "ATOMAR" is used for two different classes in the same inheritance tree:
>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>
>> at
>> org.apache.openjpa.jdbc.meta.strats.ValueMapDiscriminatorStrategy.mapDiscrim
>> inatorValue(ValueMapDiscriminatorStrategy.java:116)
>>
>> Thanks for you´r advice
>>
>> Annette Scherer
>>
>>
>>
>>
>>
>>
>>
>>
>> extract of our model:
>>
>> @Entity
>> @Table(name="TAKATEGORIE")
>> @ManagedInterface
>> public interface Kategorie extends Serializable{
>> @Id
>> @Column(name="NAME", length=50)
>> public String getName();
>> public void setName(String newName);
>>
>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>> public java.util.List<Typ> getTypListe();
>> public void setTypListe(java.util.List<Typ> newTypListe);
>>
>> public void addToTypListe(Typ o);
>> public void removeFromTypListe(Typ o);
>> }
>>
>>
>> @Entity
>> @Table(name="TATYP")
>> @ManagedInterface
>> public interface Typ extends Serializable {
>> @Id
>> @Column(name="SELEKTIONSNUMMER", length=4)
>> public String getSelectionID();
>> public void setSelectionID(String newOperationId);
>>
>> @Column(name="NAME", length=60)
>> public String getName();
>> public void setName(String newName);
>>
>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>> public java.util.List<Parameter> getParameterListe();
>> public void setParameterListe(java.util.List<Parameter>
>> newParameterListe);
>>
>> public void addToParameterListe(Parameter o);
>> public void removeFromParameterListe(Parameter o);
>> }
>>
>>
>> @Entity
>> @Table(name="TAPARAMETER")
>> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
>> @DiscriminatorColumn(name="Typ",
>> discriminatorType=DiscriminatorType.STRING)
>> @ManagedInterface
>> public interface Parameter extends Serializable{
>> @Id
>> @GeneratedValue(strategy=GenerationType.IDENTITY)
>> public long getId();
>> public void setId(long newId);
>>
>> @Column(name="KOMPONENTENTYP", length=50)
>> public String getKomponentenTyp();
>> public void setKomponentenTyp(String newKomponentenTyp);
>> }
>>
>>
>> @Entity(name="ATOMAR")
>> @ManagedInterface
>> public interface ParameterAtomar extends Parameter {
>>
>> @Column(name="NAME", length=50)
>> public String getName();
>> public void setName(String newName);
>>
>> @Column(name="BEZEICHNUNG", length=50)
>> public String getBezeichnung();
>> public void setBezeichnung(String bezeichnung);
>> }
>>
>> @Entity
>> @ManagedInterface
>> public interface ParameterListeAtomar extends ParameterAtomar {
>> public String getInhalt();
>> public void setInhalt(String newInhalt);
>>
>> public void addToListenWerte(String o);
>> public void removeFromListenWerte(String o);
>>
>> public DomainAssociation fetchDomainAssociation();
>> }
>>
>> public class KategorieImpl implements Kategorie, Serializable {
>> ..............
>> }
>>
>> public class TypImpl implements Typ, Serializable {
>> .............
>> }
>>
>> public abstract class ParameterImpl implements Parameter, Serializable {
>> ............
>> }
>>
>> public abstract class ParameterAtomarImpl extends ParameterImpl
>> implements
>> ParameterAtomar {
>> ...........
>> }
>>
>>
>> public class ParameterListeAtomarImpl extends ParameterAtomarImpl
>> implements
>> ParameterListeAtomar{
>> private String inhalt;
>> private List<String> listenWerte;
>>
>> public ParameterListeAtomarImpl() {
>> }
>>
>> private String getInhalt() {
>> return this.inhalt;
>> }
>>
>> private void setInhalt(String newInhalt) {
>> this.inhalt = newInhalt;
>> // do something else
>> }
>>
>> private java.util.List getListenWerte() {
>> return this.listenWerte;
>> }
>>
>> private void setListenWerte(java.util.List newListenWerte) {
>> this.listenWerte = newListenWerte;
>> // do something else
>> }
>>
>> public void addToListenWerte(String o) {
>> this.getListenWerte().add(o);
>> // do something else
>> }
>>
>> public void removeFromListenWerte(String o) {
>> this.getListenWerte().remove(o);
>> // do something else }
>>
>>
>> public DomainAssociation fetchDomainAssociation(){
>> DomainAssociation da = //fetch a special object for further use
>> return da;
>> }
>> }
>>
>>
>>
>>
>>
>>
>
> --
> View this message in context:
> http://n2.nabble.com/ManagedInterfaces-tp2438473p2445629.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>
>
>
--
View this message in context: http://n2.nabble.com/ManagedInterfaces-tp2438473p2448900.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: AW: ManagedInterfaces
Posted by Pinaki Poddar <pp...@apache.org>.
Hi,
is "de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl" mentioned in
<class> clause of META-INF/persstence.xml? as well as
"de.huk.vtp.selektionen.bo.ParameterListeAtomar" ?
Scherer, Annette wrote:
>
> Hi,
>
> unfortunately this approach does not lead to desired behaviour. When
> instantiating our implemented class with ParameterListeAtomar pc = new
> ParameterListeAtomarImpl(...) as suggested, we receive another error:
>
> Exception in thread "main" <openjpa-1.2.0-r422266:683325 nonfatal user
> error> org.apache.openjpa.persistence.ArgumentException: Attempt to cast
> instance "de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl@10e35d5" to
> PersistenceCapable failed. Ensure that it has been enhanced.
>
>
> This corresponds to Apache OpenJPA User's Gide
> (http://openjpa.apache.org/builds/1.2.0/apache-openjpa-1.2.0/docs/manual/manual.html#ref_guide_pc_interfaces)
>
> What else can we do?
>
>
> Greetings
> Annette Scherer
>
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: Pinaki Poddar [mailto:ppoddar@apache.org]
> Gesendet: Sonntag, 8. März 2009 19:50
> An: users@openjpa.apache.org
> Betreff: Re: ManagedInterfaces
>
>
> Hi,
> > 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
> objects
>
> This method will create a class *dynamically* which implements the
> given
> interface.
> As the stacktrace shows, it has created a class named
> 'de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl'.
> But this dynamically generated class does not know what do when some
> calls its fetchDomainAssociation() method on it and simply will throw
> exception. It only knows how to behave for its bean-style get/set methods.
>
> So, for this use case where you not only use ManagedInterface but also
> have implemented these interfaces, you should instantiate your implemented
> class directly i.e.
> ParameterListeAtomar pc = new ParameterListeAtomarImpl(...);
>
> You can continue using the interface for find() or query such as
> ParameterListeAtomar pc = em.find(ParameterListeAtomar.class, someId);
> This should return you an instance of ParameterListeAtomarImpl which has
> the correct implementation of fetchDomainAssociation().
>
>
>
>
>
> Annette Scherer wrote:
>>
>> Hello,
>>
>> we have several problems using OpenJPA with managed interfaces.
>> I try to explain:
>>
>> preconditions
>> 1. we use the model below. Each interface is implemented by a class with
>> postfix Impl
>> 2. we continuously use ManagedInterfaces
>> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
>> objects
>>
>>
>> problems
>> 1. when reading a kategorie object with openJPAEm.find(Kategorie.class,
>> String name) we get an openjpa object like this, which differs from our
>> implementations.
>>
>>
>>
>> When trying to call a method of one of our implementations (for example
>> fetchDomainAssociation on ParameterListeAtomarImpl, we get this
>> exception:
>> [05.03.09 15:34:29:796 CET] 00000020 SystemErr R
>> java.lang.UnsupportedOperationException
>> [05.03.09 15:34:29:812 CET] 00000020 SystemErr R at
>> de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl.fetchDo
>> mainAssociation(Unknown Source)
>>
>> How can we avoid this problem? It is a killer argument for using JPA in
>> our
>> applications, for using interfaces is a corporation wide paradigma.
>>
>>
>>
>> 2. another problem is the use of inheritance. With annotations we used
>> for
>> Parameter, ParameterAtomar for example, we receive this exeption:
>> [04.03.09 14:17:47:004 CET] 00000021 SystemOut O [04 Mär 2009 14:17:46]
>> DEBUG [LifecycleImpl.java:259 -- phase] - afterPhase(RESTORE_VIEW
>> 1,com.icesoft.faces.context.BridgeFacesContext@60ae60ae) threw exception:
>> <openjpa-1.2.0-r422266:683325 fatal user error>
>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>> "ATOMAR" is used for two different classes in the same inheritance tree:
>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar" Discriminator value "ATOMAR"
>> is
>> used for two different classes in the same inheritance tree: "interface
>> de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>
>> <openjpa-1.2.0-r422266:683325 fatal user error>
>> org.apache.openjpa.persistence.ArgumentException: Discriminator value
>> "ATOMAR" is used for two different classes in the same inheritance tree:
>> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
>> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>>
>> at
>> org.apache.openjpa.jdbc.meta.strats.ValueMapDiscriminatorStrategy.mapDiscrim
>> inatorValue(ValueMapDiscriminatorStrategy.java:116)
>>
>> Thanks for you´r advice
>>
>> Annette Scherer
>>
>>
>>
>>
>>
>>
>>
>>
>> extract of our model:
>>
>> @Entity
>> @Table(name="TAKATEGORIE")
>> @ManagedInterface
>> public interface Kategorie extends Serializable{
>> @Id
>> @Column(name="NAME", length=50)
>> public String getName();
>> public void setName(String newName);
>>
>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>> public java.util.List<Typ> getTypListe();
>> public void setTypListe(java.util.List<Typ> newTypListe);
>>
>> public void addToTypListe(Typ o);
>> public void removeFromTypListe(Typ o);
>> }
>>
>>
>> @Entity
>> @Table(name="TATYP")
>> @ManagedInterface
>> public interface Typ extends Serializable {
>> @Id
>> @Column(name="SELEKTIONSNUMMER", length=4)
>> public String getSelectionID();
>> public void setSelectionID(String newOperationId);
>>
>> @Column(name="NAME", length=60)
>> public String getName();
>> public void setName(String newName);
>>
>> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
>> public java.util.List<Parameter> getParameterListe();
>> public void setParameterListe(java.util.List<Parameter>
>> newParameterListe);
>>
>> public void addToParameterListe(Parameter o);
>> public void removeFromParameterListe(Parameter o);
>> }
>>
>>
>> @Entity
>> @Table(name="TAPARAMETER")
>> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
>> @DiscriminatorColumn(name="Typ",
>> discriminatorType=DiscriminatorType.STRING)
>> @ManagedInterface
>> public interface Parameter extends Serializable{
>> @Id
>> @GeneratedValue(strategy=GenerationType.IDENTITY)
>> public long getId();
>> public void setId(long newId);
>>
>> @Column(name="KOMPONENTENTYP", length=50)
>> public String getKomponentenTyp();
>> public void setKomponentenTyp(String newKomponentenTyp);
>> }
>>
>>
>> @Entity(name="ATOMAR")
>> @ManagedInterface
>> public interface ParameterAtomar extends Parameter {
>>
>> @Column(name="NAME", length=50)
>> public String getName();
>> public void setName(String newName);
>>
>> @Column(name="BEZEICHNUNG", length=50)
>> public String getBezeichnung();
>> public void setBezeichnung(String bezeichnung);
>> }
>>
>> @Entity
>> @ManagedInterface
>> public interface ParameterListeAtomar extends ParameterAtomar {
>> public String getInhalt();
>> public void setInhalt(String newInhalt);
>>
>> public void addToListenWerte(String o);
>> public void removeFromListenWerte(String o);
>>
>> public DomainAssociation fetchDomainAssociation();
>> }
>>
>> public class KategorieImpl implements Kategorie, Serializable {
>> ..............
>> }
>>
>> public class TypImpl implements Typ, Serializable {
>> .............
>> }
>>
>> public abstract class ParameterImpl implements Parameter, Serializable {
>> ............
>> }
>>
>> public abstract class ParameterAtomarImpl extends ParameterImpl
>> implements
>> ParameterAtomar {
>> ...........
>> }
>>
>>
>> public class ParameterListeAtomarImpl extends ParameterAtomarImpl
>> implements
>> ParameterListeAtomar{
>> private String inhalt;
>> private List<String> listenWerte;
>>
>> public ParameterListeAtomarImpl() {
>> }
>>
>> private String getInhalt() {
>> return this.inhalt;
>> }
>>
>> private void setInhalt(String newInhalt) {
>> this.inhalt = newInhalt;
>> // do something else
>> }
>>
>> private java.util.List getListenWerte() {
>> return this.listenWerte;
>> }
>>
>> private void setListenWerte(java.util.List newListenWerte) {
>> this.listenWerte = newListenWerte;
>> // do something else
>> }
>>
>> public void addToListenWerte(String o) {
>> this.getListenWerte().add(o);
>> // do something else
>> }
>>
>> public void removeFromListenWerte(String o) {
>> this.getListenWerte().remove(o);
>> // do something else }
>>
>>
>> public DomainAssociation fetchDomainAssociation(){
>> DomainAssociation da = //fetch a special object for further use
>> return da;
>> }
>> }
>>
>>
>>
>>
>>
>>
>
> --
> View this message in context:
> http://n2.nabble.com/ManagedInterfaces-tp2438473p2445629.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>
>
>
--
View this message in context: http://n2.nabble.com/ManagedInterfaces-tp2438473p2448429.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
AW: ManagedInterfaces
Posted by "Scherer, Annette" <An...@huk-coburg.de>.
Hi,
unfortunately this approach does not lead to desired behaviour. When instantiating our implemented class with ParameterListeAtomar pc = new ParameterListeAtomarImpl(...) as suggested, we receive another error:
Exception in thread "main" <openjpa-1.2.0-r422266:683325 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: Attempt to cast instance "de.huk.vtp.selektionen.bo.ParameterListeAtomarImpl@10e35d5" to PersistenceCapable failed. Ensure that it has been enhanced.
This corresponds to Apache OpenJPA User's Gide (http://openjpa.apache.org/builds/1.2.0/apache-openjpa-1.2.0/docs/manual/manual.html#ref_guide_pc_interfaces)
What else can we do?
Greetings
Annette Scherer
-----Ursprüngliche Nachricht-----
Von: Pinaki Poddar [mailto:ppoddar@apache.org]
Gesendet: Sonntag, 8. März 2009 19:50
An: users@openjpa.apache.org
Betreff: Re: ManagedInterfaces
Hi,
> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
objects
This method will create a class *dynamically* which implements the given
interface.
As the stacktrace shows, it has created a class named
'de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl'.
But this dynamically generated class does not know what do when some
calls its fetchDomainAssociation() method on it and simply will throw
exception. It only knows how to behave for its bean-style get/set methods.
So, for this use case where you not only use ManagedInterface but also
have implemented these interfaces, you should instantiate your implemented
class directly i.e.
ParameterListeAtomar pc = new ParameterListeAtomarImpl(...);
You can continue using the interface for find() or query such as
ParameterListeAtomar pc = em.find(ParameterListeAtomar.class, someId);
This should return you an instance of ParameterListeAtomarImpl which has
the correct implementation of fetchDomainAssociation().
Annette Scherer wrote:
>
> Hello,
>
> we have several problems using OpenJPA with managed interfaces.
> I try to explain:
>
> preconditions
> 1. we use the model below. Each interface is implemented by a class with
> postfix Impl
> 2. we continuously use ManagedInterfaces
> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
> objects
>
>
> problems
> 1. when reading a kategorie object with openJPAEm.find(Kategorie.class,
> String name) we get an openjpa object like this, which differs from our
> implementations.
>
>
>
> When trying to call a method of one of our implementations (for example
> fetchDomainAssociation on ParameterListeAtomarImpl, we get this exception:
> [05.03.09 15:34:29:796 CET] 00000020 SystemErr R
> java.lang.UnsupportedOperationException
> [05.03.09 15:34:29:812 CET] 00000020 SystemErr R at
> de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl.fetchDo
> mainAssociation(Unknown Source)
>
> How can we avoid this problem? It is a killer argument for using JPA in
> our
> applications, for using interfaces is a corporation wide paradigma.
>
>
>
> 2. another problem is the use of inheritance. With annotations we used for
> Parameter, ParameterAtomar for example, we receive this exeption:
> [04.03.09 14:17:47:004 CET] 00000021 SystemOut O [04 Mär 2009 14:17:46]
> DEBUG [LifecycleImpl.java:259 -- phase] - afterPhase(RESTORE_VIEW
> 1,com.icesoft.faces.context.BridgeFacesContext@60ae60ae) threw exception:
> <openjpa-1.2.0-r422266:683325 fatal user error>
> org.apache.openjpa.persistence.ArgumentException: Discriminator value
> "ATOMAR" is used for two different classes in the same inheritance tree:
> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
> "de.huk.vtp.selektionen.bo.ParameterAtomar" Discriminator value "ATOMAR"
> is
> used for two different classes in the same inheritance tree: "interface
> de.huk.vtp.selektionen.bo.ParameterAtomar",
> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>
> <openjpa-1.2.0-r422266:683325 fatal user error>
> org.apache.openjpa.persistence.ArgumentException: Discriminator value
> "ATOMAR" is used for two different classes in the same inheritance tree:
> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>
> at
> org.apache.openjpa.jdbc.meta.strats.ValueMapDiscriminatorStrategy.mapDiscrim
> inatorValue(ValueMapDiscriminatorStrategy.java:116)
>
> Thanks for you´r advice
>
> Annette Scherer
>
>
>
>
>
>
>
>
> extract of our model:
>
> @Entity
> @Table(name="TAKATEGORIE")
> @ManagedInterface
> public interface Kategorie extends Serializable{
> @Id
> @Column(name="NAME", length=50)
> public String getName();
> public void setName(String newName);
>
> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
> public java.util.List<Typ> getTypListe();
> public void setTypListe(java.util.List<Typ> newTypListe);
>
> public void addToTypListe(Typ o);
> public void removeFromTypListe(Typ o);
> }
>
>
> @Entity
> @Table(name="TATYP")
> @ManagedInterface
> public interface Typ extends Serializable {
> @Id
> @Column(name="SELEKTIONSNUMMER", length=4)
> public String getSelectionID();
> public void setSelectionID(String newOperationId);
>
> @Column(name="NAME", length=60)
> public String getName();
> public void setName(String newName);
>
> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
> public java.util.List<Parameter> getParameterListe();
> public void setParameterListe(java.util.List<Parameter>
> newParameterListe);
>
> public void addToParameterListe(Parameter o);
> public void removeFromParameterListe(Parameter o);
> }
>
>
> @Entity
> @Table(name="TAPARAMETER")
> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
> @DiscriminatorColumn(name="Typ",
> discriminatorType=DiscriminatorType.STRING)
> @ManagedInterface
> public interface Parameter extends Serializable{
> @Id
> @GeneratedValue(strategy=GenerationType.IDENTITY)
> public long getId();
> public void setId(long newId);
>
> @Column(name="KOMPONENTENTYP", length=50)
> public String getKomponentenTyp();
> public void setKomponentenTyp(String newKomponentenTyp);
> }
>
>
> @Entity(name="ATOMAR")
> @ManagedInterface
> public interface ParameterAtomar extends Parameter {
>
> @Column(name="NAME", length=50)
> public String getName();
> public void setName(String newName);
>
> @Column(name="BEZEICHNUNG", length=50)
> public String getBezeichnung();
> public void setBezeichnung(String bezeichnung);
> }
>
> @Entity
> @ManagedInterface
> public interface ParameterListeAtomar extends ParameterAtomar {
> public String getInhalt();
> public void setInhalt(String newInhalt);
>
> public void addToListenWerte(String o);
> public void removeFromListenWerte(String o);
>
> public DomainAssociation fetchDomainAssociation();
> }
>
> public class KategorieImpl implements Kategorie, Serializable {
> ..............
> }
>
> public class TypImpl implements Typ, Serializable {
> .............
> }
>
> public abstract class ParameterImpl implements Parameter, Serializable {
> ............
> }
>
> public abstract class ParameterAtomarImpl extends ParameterImpl implements
> ParameterAtomar {
> ...........
> }
>
>
> public class ParameterListeAtomarImpl extends ParameterAtomarImpl
> implements
> ParameterListeAtomar{
> private String inhalt;
> private List<String> listenWerte;
>
> public ParameterListeAtomarImpl() {
> }
>
> private String getInhalt() {
> return this.inhalt;
> }
>
> private void setInhalt(String newInhalt) {
> this.inhalt = newInhalt;
> // do something else
> }
>
> private java.util.List getListenWerte() {
> return this.listenWerte;
> }
>
> private void setListenWerte(java.util.List newListenWerte) {
> this.listenWerte = newListenWerte;
> // do something else
> }
>
> public void addToListenWerte(String o) {
> this.getListenWerte().add(o);
> // do something else
> }
>
> public void removeFromListenWerte(String o) {
> this.getListenWerte().remove(o);
> // do something else }
>
>
> public DomainAssociation fetchDomainAssociation(){
> DomainAssociation da = //fetch a special object for further use
> return da;
> }
> }
>
>
>
>
>
>
--
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Re: ManagedInterfaces
Posted by Pinaki Poddar <pp...@apache.org>.
Hi,
> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
objects
This method will create a class *dynamically* which implements the given
interface.
As the stacktrace shows, it has created a class named
'de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl'.
But this dynamically generated class does not know what do when some
calls its fetchDomainAssociation() method on it and simply will throw
exception. It only knows how to behave for its bean-style get/set methods.
So, for this use case where you not only use ManagedInterface but also
have implemented these interfaces, you should instantiate your implemented
class directly i.e.
ParameterListeAtomar pc = new ParameterListeAtomarImpl(...);
You can continue using the interface for find() or query such as
ParameterListeAtomar pc = em.find(ParameterListeAtomar.class, someId);
This should return you an instance of ParameterListeAtomarImpl which has
the correct implementation of fetchDomainAssociation().
Annette Scherer wrote:
>
> Hello,
>
> we have several problems using OpenJPA with managed interfaces.
> I try to explain:
>
> preconditions
> 1. we use the model below. Each interface is implemented by a class with
> postfix Impl
> 2. we continuously use ManagedInterfaces
> 3. we use OpenJPAEntityManager.createInstance(Class) to instantiate
> objects
>
>
> problems
> 1. when reading a kategorie object with openJPAEm.find(Kategorie.class,
> String name) we get an openjpa object like this, which differs from our
> implementations.
>
>
>
> When trying to call a method of one of our implementations (for example
> fetchDomainAssociation on ParameterListeAtomarImpl, we get this exception:
> [05.03.09 15:34:29:796 CET] 00000020 SystemErr R
> java.lang.UnsupportedOperationException
> [05.03.09 15:34:29:812 CET] 00000020 SystemErr R at
> de.huk.vtp.selektionen.bo.ParameterListeAtomar$1841851848openjpaimpl.fetchDo
> mainAssociation(Unknown Source)
>
> How can we avoid this problem? It is a killer argument for using JPA in
> our
> applications, for using interfaces is a corporation wide paradigma.
>
>
>
> 2. another problem is the use of inheritance. With annotations we used for
> Parameter, ParameterAtomar for example, we receive this exeption:
> [04.03.09 14:17:47:004 CET] 00000021 SystemOut O [04 Mär 2009 14:17:46]
> DEBUG [LifecycleImpl.java:259 -- phase] - afterPhase(RESTORE_VIEW
> 1,com.icesoft.faces.context.BridgeFacesContext@60ae60ae) threw exception:
> <openjpa-1.2.0-r422266:683325 fatal user error>
> org.apache.openjpa.persistence.ArgumentException: Discriminator value
> "ATOMAR" is used for two different classes in the same inheritance tree:
> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
> "de.huk.vtp.selektionen.bo.ParameterAtomar" Discriminator value "ATOMAR"
> is
> used for two different classes in the same inheritance tree: "interface
> de.huk.vtp.selektionen.bo.ParameterAtomar",
> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>
> <openjpa-1.2.0-r422266:683325 fatal user error>
> org.apache.openjpa.persistence.ArgumentException: Discriminator value
> "ATOMAR" is used for two different classes in the same inheritance tree:
> "interface de.huk.vtp.selektionen.bo.ParameterAtomar",
> "de.huk.vtp.selektionen.bo.ParameterAtomar"
>
> at
> org.apache.openjpa.jdbc.meta.strats.ValueMapDiscriminatorStrategy.mapDiscrim
> inatorValue(ValueMapDiscriminatorStrategy.java:116)
>
> Thanks for you´r advice
>
> Annette Scherer
>
>
>
>
>
>
>
>
> extract of our model:
>
> @Entity
> @Table(name="TAKATEGORIE")
> @ManagedInterface
> public interface Kategorie extends Serializable{
> @Id
> @Column(name="NAME", length=50)
> public String getName();
> public void setName(String newName);
>
> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
> public java.util.List<Typ> getTypListe();
> public void setTypListe(java.util.List<Typ> newTypListe);
>
> public void addToTypListe(Typ o);
> public void removeFromTypListe(Typ o);
> }
>
>
> @Entity
> @Table(name="TATYP")
> @ManagedInterface
> public interface Typ extends Serializable {
> @Id
> @Column(name="SELEKTIONSNUMMER", length=4)
> public String getSelectionID();
> public void setSelectionID(String newOperationId);
>
> @Column(name="NAME", length=60)
> public String getName();
> public void setName(String newName);
>
> @OneToMany(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST})
> public java.util.List<Parameter> getParameterListe();
> public void setParameterListe(java.util.List<Parameter>
> newParameterListe);
>
> public void addToParameterListe(Parameter o);
> public void removeFromParameterListe(Parameter o);
> }
>
>
> @Entity
> @Table(name="TAPARAMETER")
> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
> @DiscriminatorColumn(name="Typ",
> discriminatorType=DiscriminatorType.STRING)
> @ManagedInterface
> public interface Parameter extends Serializable{
> @Id
> @GeneratedValue(strategy=GenerationType.IDENTITY)
> public long getId();
> public void setId(long newId);
>
> @Column(name="KOMPONENTENTYP", length=50)
> public String getKomponentenTyp();
> public void setKomponentenTyp(String newKomponentenTyp);
> }
>
>
> @Entity(name="ATOMAR")
> @ManagedInterface
> public interface ParameterAtomar extends Parameter {
>
> @Column(name="NAME", length=50)
> public String getName();
> public void setName(String newName);
>
> @Column(name="BEZEICHNUNG", length=50)
> public String getBezeichnung();
> public void setBezeichnung(String bezeichnung);
> }
>
> @Entity
> @ManagedInterface
> public interface ParameterListeAtomar extends ParameterAtomar {
> public String getInhalt();
> public void setInhalt(String newInhalt);
>
> public void addToListenWerte(String o);
> public void removeFromListenWerte(String o);
>
> public DomainAssociation fetchDomainAssociation();
> }
>
> public class KategorieImpl implements Kategorie, Serializable {
> ..............
> }
>
> public class TypImpl implements Typ, Serializable {
> .............
> }
>
> public abstract class ParameterImpl implements Parameter, Serializable {
> ............
> }
>
> public abstract class ParameterAtomarImpl extends ParameterImpl implements
> ParameterAtomar {
> ...........
> }
>
>
> public class ParameterListeAtomarImpl extends ParameterAtomarImpl
> implements
> ParameterListeAtomar{
> private String inhalt;
> private List<String> listenWerte;
>
> public ParameterListeAtomarImpl() {
> }
>
> private String getInhalt() {
> return this.inhalt;
> }
>
> private void setInhalt(String newInhalt) {
> this.inhalt = newInhalt;
> // do something else
> }
>
> private java.util.List getListenWerte() {
> return this.listenWerte;
> }
>
> private void setListenWerte(java.util.List newListenWerte) {
> this.listenWerte = newListenWerte;
> // do something else
> }
>
> public void addToListenWerte(String o) {
> this.getListenWerte().add(o);
> // do something else
> }
>
> public void removeFromListenWerte(String o) {
> this.getListenWerte().remove(o);
> // do something else }
>
>
> public DomainAssociation fetchDomainAssociation(){
> DomainAssociation da = //fetch a special object for further use
> return da;
> }
> }
>
>
>
>
>
>
--
View this message in context: http://n2.nabble.com/ManagedInterfaces-tp2438473p2445629.html
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