Hello,
I have an abstract class called AbstractActivity that doesn't map to any tables. I have two concrete classes AActivity and BActivity that map to two separate tables.
Here is the mapping of AActivity
Code:
<hibernate-mapping package="com.mda.acms.database.persistence.hb">
<class name="AActivity" table="aac_activity" >
<id name="id" type="java.lang.Integer" unsaved-value="null">
<column name="id" />
<generator class="sequence">
<param name="sequence">aac_activity_seq</param>
</generator>
</id>
<property name="emailAddress" type="string">
<column name="email_address" length="200" />
</property>
</class>
<query name="AcquisitionActivity.testQuery">
<![CDATA[
some query
]]>
</query>
</hibernate-mapping>
I have a very similar mapping for BActivity. I want to keep these two entities separate in db.
Now here is the code for AActivity:
Code:
public class AActivity extends AbstractActivity
{
private String emailAddress //with getters and setters
public AActivity()
{
super();
}
}
and here is the code for AbstractActivity
Code:
public abstract class AbstractActivity implements Serializable
{
private Integer id; //with getters and setters
}
Now when i create an object from AActivity or BActivity and save it, there is no problem, everything is saved in db.
but I get an exception if i try to call any queries in AActivity's or BActivity's mapping file. Here is the exception:
Code:
09:27:16,195 INFO [AcquisitionActivityManagerEjb] Error: null
09:27:16,195 ERROR [STDERR] java.lang.reflect.UndeclaredThrowableException
09:27:16,195 ERROR [STDERR] at $Proxy80.getNamedQuery(Unknown Source)
09:27:16,195 ERROR [STDERR] at com.mda.acms.database.activity.ejb.AcquisitionActivityManagerEjb.findRequiresManualCheckActivities(Unknown Source)
09:27:16,195 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
09:27:16,195 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
09:27:16,195 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
09:27:16,195 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
09:27:16,195 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
09:27:16,195 ERROR [STDERR] at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
09:27:16,195 ERROR [STDERR] at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
09:27:16,195 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,195 ERROR [STDERR] at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:
54)
09:27:16,195 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,195 ERROR [STDERR] at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:46)
09:27:16,195 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,195 ERROR [STDERR] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
09:27:16,195 ERROR [STDERR] at org.jboss.aspects.tx.TxInterceptor$RequiresNew.invoke(TxInterceptor.java:262)
09:27:16,195 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,195 ERROR [STDERR] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
09:27:16,195 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,195 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
09:27:16,195 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,195 ERROR [STDERR] at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
09:27:16,195 ERROR [STDERR] at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102)
09:27:16,211 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,211 ERROR [STDERR] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
09:27:16,211 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,211 ERROR [STDERR] at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
09:27:16,211 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,211 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:263)
09:27:16,211 ERROR [STDERR] at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
09:27:16,211 ERROR [STDERR] at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
09:27:16,211 ERROR [STDERR] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828)
09:27:16,211 ERROR [STDERR] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681)
09:27:16,211 ERROR [STDERR] at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:358)
09:27:16,211 ERROR [STDERR] at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:412)
09:27:16,211 ERROR [STDERR] at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:239)
09:27:16,211 ERROR [STDERR] Caused by: org.jboss.serial.exception.SerializationException: Could not create instance of org.hibernate.impl.QueryImpl -
org.hibernate.impl.QueryImpl
09:27:16,211 ERROR [STDERR] at org.jboss.serial.classmetamodel.ClassMetaData.newInstance(ClassMetaData.java:342)
09:27:16,211 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:239)
09:27:16,211 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.ja
va:412)
09:27:16,211 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)
09:27:16,211 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerInput.readObject(DataContainer.java:845)
09:27:16,211 ERROR [STDERR] at org.jboss.serial.io.MarshalledObjectForLocalCalls.get(MarshalledObjectForLocalCalls.java:60)
09:27:16,211 ERROR [STDERR] at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:73)
09:27:16,211 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
09:27:16,211 ERROR [STDERR] at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:102)
09:27:16,211 ERROR [STDERR] ... 36 more
09:27:16,211 ERROR [STDERR] Caused by: java.lang.InstantiationException: org.hibernate.impl.QueryImpl
09:27:16,211 ERROR [STDERR] at java.lang.Class.newInstance0(Class.java:335)
09:27:16,211 ERROR [STDERR] at java.lang.Class.newInstance(Class.java:303)
09:27:16,211 ERROR [STDERR] at org.jboss.serial.classmetamodel.ClassMetaData.newInstance(ClassMetaData.java:334)
09:27:16,211 ERROR [STDERR] ... 44 more
Does "java.lang.InstantiationException: org.hibernate.impl.QueryImpl " mean that hibernate cannot understand the way my code is structured and hence cannot instantiate it?
I also tried
Code:
public class AActivity extends AbstractActivity implements Serializable
but no luck.
Any ideas?
thanks in advance
Login
FAQ
Search