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1. Re: selectOneMenu - NPE
w17chm4n Nov 19, 2007 4:47 AM (in response to w17chm4n)Exception
10:40:36,766 ERROR [STDERR] Nov 19, 2007 10:40:36 AM com.sun.facelets.FaceletViewHandler handleRenderException SEVERE: Error Rendering View[/question.xhtml] java.lang.NullPointerException at org.jboss.seam.ui.converter.EntityConverterStore.getEntityManager(EntityConverterStore.java:81) at org.jboss.seam.ui.converter.EntityConverterStore.put(EntityConverterStore.java:60) 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:40) 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:106) at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91) at org.jboss.seam.ui.converter.EntityConverterStore_$$_javassist_0.put(EntityConverterStore_$$_javassist_0.java) at org.jboss.seam.ui.converter.EntityConverter.getAsString(EntityConverter.java:67) 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.render.Renderer.encodeChildren(Renderer.java:137) at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892) at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592) 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$FilterChainImpl.doFilter(SeamFilter.java:83) at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44) at org.jboss.seam.servlet.SeamFilter$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:595)
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2. Re: selectOneMenu - NPE
marius.oancea Nov 19, 2007 4:48 AM (in response to w17chm4n)Please post the whole NPE exception.
Are you sure questionCategoryList is outjected? -
3. Re: selectOneMenu - NPE
marius.oancea Nov 19, 2007 4:54 AM (in response to w17chm4n)Ah. I posted my message before you posted the exception.
Anyway: please make sue you are using the entityManager (and is named entityManager). This seems correct according to your posted XML.
Your entity has to have a @Id. Make sure of that.
NPE seems to be at
EntityIdentifier key = new EntityIdentifier(entity, getEntityManager());
Eventually make a brackpoint here and see what is null. -
4. Re: selectOneMenu - NPE
pmuir Nov 19, 2007 5:14 AM (in response to w17chm4n)Which version of Seam?
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5. Re: selectOneMenu - NPE
w17chm4n Nov 19, 2007 5:27 AM (in response to w17chm4n)@Pete
Seam 2.0.0.GA
@Marius
Yes I`m sure that questionCategoryList is outjected. Anyway, this code works on Seam 1.2.1.GA...
questionCategory entity@Entity @Scope(ScopeType.EVENT) @Name("questionCategory") @Table(name="QuestionCategories") public class QuestionCategory implements Serializable { @Id @GeneratedValue private Long id; @NotNull @Length(min=3, max=100) private String categoryName; @OneToMany @JoinColumn(name="category_id") private List<Question> questionList; @Temporal(value = TemporalType.TIMESTAMP) private Date created; @Override public boolean equals(Object obj) { if (!(obj instanceof QuestionCategory) || this.id == null) { return false; } return this.id.equals(((QuestionCategory)obj).getId()); } public QuestionCategory() { this.questionList = new ArrayList<Question>(); } public QuestionCategory(String categoryName) { this.categoryName = categoryName; this.questionList = new ArrayList<Question>(); } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getCategoryName() { return categoryName; } public void setCategoryName(String categoryName) { this.categoryName = categoryName; } public List<Question> getQuestionList() { return questionList; } public void setQuestionList(List<Question> questionList) { this.questionList = questionList; } public Date getCreated() { return created; } public void setCreated(Date created) { this.created = created; } }
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6. Re: selectOneMenu - NPE
dhinojosa Nov 19, 2007 11:43 AM (in response to w17chm4n)1. What does the bean that generates questionCategoryList look like?
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7. Re: selectOneMenu - NPE
w17chm4n Nov 20, 2007 2:33 AM (in response to w17chm4n)@Stateful @Scope(ScopeType.SESSION) @Name("QuestionCategoryController") public class QuestionCategoryControllerBean implements QuestionCategoryController { @Logger private Log log; @In(create = true) private QuestionCategoryManager questionCategoryManager; @DataModel private List<QuestionCategory> questionCategoryList; @In(create = true) @DataModelSelection private QuestionCategory questionCategory; public void addCategory() { log.info("Adding category [#{questionCategory.categoryName}]"); questionCategoryManager.addCategory(questionCategory); getAllQuestionsCategories(); } public void removeCategory() { questionCategoryList.remove(questionCategory); questionCategoryManager.removeCategory(questionCategory); questionCategory = null; getAllQuestionsCategories(); } @Factory(value="questionCategoryList") public void getAllQuestionsCategories() { questionCategoryList = questionCategoryManager.getAllQuestionCategories(); } @Remove @Destroy public void destroy() {} }
Session contextQuestionCategoryController QuestionController facelets.ui.DebugOutput javax.faces.request.charset org.jboss.seam.core.conversationEntries org.jboss.seam.international.localeSelector org.jboss.seam.international.timeZoneSelector org.jboss.seam.security.identity org.jboss.seam.web.session questionCategoryList
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9. Re: selectOneMenu - NPE
pmuir Nov 21, 2007 5:24 AM (in response to w17chm4n)If you can create a runnable example and provide steps to reproduce please put an issue into JIRA so I can take a look.