s:entityConverter NullPointerException with Hibernate
Seam version 2.0.1.GA
I got a NullPointerException when I tried to use s:convertEntity with Hibernate. Here are my settings.
components.xml
<persistence:hibernate-session-factory
name="hibernateSessionFactory" />
<persistence:managed-hibernate-session name="session"
auto-create="true" session-factory-jndi-name="java:/sessionFactory" />
<component name="org.jboss.seam.ui.converter.EntityConverter">
<property name="session">#{session}</property>
</component><h:selectOneMenu value="#{mybean.gown.gownColor}" required="true">
<s:selectItems value="#{mybean.gownColors}" var="gownColor" label="#{gownColor.color}" noSelectionLabel="Please Select..."/>
<s:convertEntity/>
</h:selectOneMenu>mybean (gown object is initialized with execute method in pages.xml)
private Gown gown;
public Gown getGown() {
return gown;
}
public void setGown(Gown gown) {
this.gown = gown;
}Exception java.lang.NullPointerException at org.jboss.seam.ui.converter.entityConverter.EntityLoader.getPersistenceContext(EntityLoader.java:30) at org.jboss.seam.ui.converter.entityConverter.EntityLoader.getPersistenceContext(EntityLoader.java:24) at org.jboss.seam.ui.converter.entityConverter.AbstractEntityLoader.put(AbstractEntityLoader.java:46) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.seam.util.Reflections.invoke(Reflections.java:21) at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56) at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:38) at org.jboss.seam.util.Work.workInTransaction(Work.java:41) at org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:32) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107) at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102) at org.jboss.seam.ui.converter.entityConverter.EntityLoader_$$_javassist_3.put(EntityLoader_$$_javassist_3.java) at org.jboss.seam.ui.converter.EntityConverter.getAsString(EntityConverter.java:77) at org.jboss.seam.ui.converter.PrioritizableConverter.getAsString(PrioritizableConverter.java:67) at org.jboss.seam.ui.converter.ConverterChain.getAsString(ConverterChain.java:123) at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getFormattedValue(HtmlBasicRenderer.java:469) at com.sun.faces.renderkit.html_basic.MenuRenderer.renderOption(MenuRenderer.java:502) at com.sun.faces.renderkit.html_basic.MenuRenderer.renderOptions(MenuRenderer.java:757) at com.sun.faces.renderkit.html_basic.MenuRenderer.renderSelect(MenuRenderer.java:811) at com.sun.faces.renderkit.html_basic.MenuRenderer.encodeEnd(MenuRenderer.java:335) at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:836) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:896) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892) at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592) at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108) at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:189) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:147) at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:276) at org.ajax4jsf.Filter.doFilter(Filter.java:175) at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) at java.lang.Thread.run(Thread.java:613)
Lets carefully review the exception
(org.jboss.seam.ui.converter.entityConverter.EntityLoader.getPersistenceContext(EntityLoader.java:30)). why is it looking for EntityLoader? Shouldn't it be looking for HibernateEntityLoader? Looking at the code below from EntityConverter it should create HibernateEntityLoader instance. So when getPersistenceContextName is called, a session
string is returned. Why is it still looking for entityManager?
Is this due to a misconfiguration? Would appreciate any help.
EntityConverter
@Create
public void create()
{
if (getEntityManager() == null && getSession() != null)
{
store = HibernateEntityLoader.instance();
}
else
{
store = EntityLoader.instance();
}
}