I am getting a "Exception occurred inside setter of..." an attribute at session.flush() eventhough this attribute is no where being set in my code. Root cause is a NullPointerException.
This is the full exception:
Code:
Exception occurred inside setter of com.forisent.framework.itemOrganizer.store.entity.OneToManyRelationship.element
net.sf.hibernate.PropertyAccessException: Exception occurred inside setter of com.forisent.framework.itemOrganizer.store.entity.OneToManyRelationship.element
at net.sf.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:49)
at net.sf.hibernate.persister.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:225)
at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:869)
at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:817)
at net.sf.hibernate.impl.SessionImpl.saveWithGeneratedIdentifier(SessionImpl.java:740)
at net.sf.hibernate.impl.SessionImpl.save(SessionImpl.java:717)
at net.sf.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:1322)
at com.forisent.framework.itemOrganizer.store.factory.PersistanceManager.persist(PersistanceManager.java:65)
at com.forisent.framework.tests.itemOrganizer.store.factory.PersistanceManagerTest.testPersistOneRelationship(PersistanceManagerTest.java:59)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at org.apache.cactus.server.runner.ServletTestRunner.run(ServletTestRunner.java:313)
at org.apache.cactus.server.runner.ServletTestRunner.doGet_aroundBody0(ServletTestRunner.java:209)
at org.apache.cactus.server.runner.ServletTestRunner.doGet_aroundBody1$advice(ServletTestRunner.java:151)
at org.apache.cactus.server.runner.ServletTestRunner.doGet(ServletTestRunner.java)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurityMgrRealm.java:228)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(ContainerStatsValve.java:76)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:65)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:601)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:534)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at net.sf.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:38)
... 71 more
Caused by: java.lang.NullPointerException
at com.forisent.framework.itemOrganizer.store.ElementReference.<init>(ElementReference.java:17)
at com.forisent.framework.itemOrganizer.store.entity.OneToManyRelationship.setElement(OneToManyRelationship.java:214)
... 76 more
This is the JUnit test that executes:
Code:
Relationship element = (Relationship) new OneToManyRelationship("Product Category", "Category");
manager.persist(element);
All the manager.persiste() method does is:
Code:
public void persist(Object obj) throws HibernateException{
Session session = _SessionFactory.openSession();
log.info("Persisting object: " + obj.getClass().toString());
session.saveOrUpdate(obj);
session.flush();
log.info("Done Saving!");
session.close();
}
Here is are the getter and setter methods of element in my class OneToManyRelationship code:
Code:
/**
* @hibernate.many-to-one
* class="com.forisent.framework.itemOrganizer.store.ElementReference"
* column="elementReferenceID"
* not-null="true"
* cascade="all"
*/
private ElementReference getElement(){
return this.element;
}
....
public void setElement(Identifiable element)
throws ElementTypeException {
//Set just one element since this is OneToMany relationship
this.element = new ElementReference(element);
}
The strange part is, setElement is called nowhere in my code. So, I am assuming that hibernate calls this setter during persisting this class. What happens is that setElement is called with a null element value and the wrapper class ElementReference throws a null pointer exception in its construtor since the attributes of Identifiable are called in the ElementReference constructor.
First, am I correct and Two, what can I do about it?
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