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Posted to users@myfaces.apache.org by Yixing Ma <yi...@interfacemgmt.net> on 2006/01/16 19:24:21 UTC
Exception while rendering children of panel-grid.
I met a Null pointer exception when run my jsp. Does anyone know why?
ERROR [http-8080-Processor23] - Exception while rendering children of
panel-grid.
java.lang.NullPointerException
at
org.apache.myfaces.renderkit.RendererUtils.internalGetSelectItemList(Rendere
rUtils.java:597)
at
org.apache.myfaces.renderkit.RendererUtils.getSelectItemList(RendererUtils.j
ava:505)
at
org.apache.myfaces.renderkit.html.HtmlRendererUtils.internalRenderSelect(Htm
lRendererUtils.java:359)
at
org.apache.myfaces.renderkit.html.HtmlRendererUtils.renderMenu(HtmlRendererU
tils.java:326)
at
org.apache.myfaces.renderkit.html.HtmlMenuRendererBase.encodeEnd(HtmlMenuRen
dererBase.java:67)
at
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:341)
at
org.apache.myfaces.renderkit.RendererUtils.renderChild(RendererUtils.java:49
4)
at
org.apache.myfaces.renderkit.html.HtmlGridRenderer.renderChildren(HtmlGridRe
nderer.java:253)
at
org.apache.myfaces.renderkit.html.HtmlGridRenderer.encodeEnd(HtmlGridRendere
r.java:131)
at
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:341)
at
javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:386)
at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:290)
at
org.apache.myfaces.taglib.UIComponentBodyTagBase.doEndTag(UIComponentBodyTag
Base.java:98)
at
org.apache.jsp.pages.CourseInputPanel_jsp._jspx_meth_h_panelGrid_0(org.apach
e.jsp.pages.CourseInputPanel_jsp:268)
at
org.apache.jsp.pages.CourseInputPanel_jsp._jspx_meth_h_form_0(org.apache.jsp
.pages.CourseInputPanel_jsp:147)
at
org.apache.jsp.pages.CourseInputPanel_jsp._jspService(org.apache.jsp.pages.C
ourseInputPanel_jsp:114)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3
22)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:173)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.
java:672)
at
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatch
er.java:574)
at
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher
.java:499)
at
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:9
66)
at
org.apache.jsp.pages.welcome_jsp._jspx_meth_f_view_0(org.apache.jsp.pages.we
lcome_jsp:148)
at
org.apache.jsp.pages.welcome_jsp._jspService(org.apache.jsp.pages.welcome_js
p:65)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3
22)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:173)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.
java:672)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDis
patcher.java:463)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatch
er.java:398)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher
.java:301)
at
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(Servl
etExternalContextImpl.java:405)
at
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHand
lerImpl.java:280)
at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:300)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:110)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:173)
at
org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsF
ilter.java:112)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:202)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:173)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:178)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126
)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105
)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processC
onnection(Http11BaseProtocol.java:663)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.jav
a:527)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWo
rkerThread.java:80)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:684)
at java.lang.Thread.run(Thread.java:595)
Code
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1">
<title>Untitled Document</title>
<link href="/css/arm.css" rel="stylesheet" type="text/css">
<link rel="stylesheet" type="text/css" href="/css/basic.css">
</head>
<h:form id="CIPForm">
<f:verbatim>
<DIV STYLE="overflow: auto; height: 300px; width: 650px">
</f:verbatim>
<h:panelGrid id="CIP_pg1" columns="4">
<h:outputText id="CIP_pg1_pgp1_o1" value="Requirement
Title:" styleClass="standard"/>
<h:inputText id="CIP_pg1_pgp1_reqTitle"
value="#{requirementEditItemBean.requirementtitle}"/>
<h:outputText id="CIP_pg1_pgp3_o1" value="Units:"
styleClass="standard"/>
<h:inputText id="CIP_pg1_pgp3_units"
value="#{requirementEditItemBean.requirementunits}"/>
<h:outputText id="CIP_pg1_pgp4_o1" value="Section:"
styleClass="standard"/>
<h:selectOneMenu id="CIP_pg1_pgp4_section"
value="#{requirementEditItemBean.selectedsectionid}"
valueChangeListener="#{requirementEditItemBean.getSubsectionAction}"
onchange="this.form.submit();" immediate="true"
style="width: 220px">
<f:converter converterId="toStringConverter" />
<f:selectItem id="CIP_pg1_pgp4_section_i1"
itemValue="blank" itemLabel="Select sections..."/>
<f:selectItems id="CIP_pg1_pgp4_section_i2"
value="#{requirementEditItemBean.sectionMap}"
/>
</h:selectOneMenu>
<h:outputText id="CIP_pg1_pgp6_o1" value="Subsection:"
styleClass="standard"/>
<h:selectOneMenu id="CIP_pg1_pgp6_subSection"
value="#{requirementEditItemBean.selectedsubsectionid}"
valueChangeListener="#{requirementEditItemBean.getSubSectionCourseListAction
}"
onchange="this.form.submit();" immediate="true"
style="width: 220px">
<f:converter converterId="toStringConverter" />
<f:selectItem id="CIP_pg1_pgp6_subSection_i1"
itemValue="blank" itemLabel="Select subsections..."/>
<f:selectItems id="CIP_pg1_pgp6_subSection_i2"
value="#{requirementEditItemBean.subsectionMap}" />
</h:selectOneMenu>
</h:panelGrid>
<h:panelGrid id="CIP_pg4" columns="2">
<h:outputText id="CIP_pg1_pgp16_o1" value="Course List:"
styleClass="standard"/>
<h:dataTable id="dt_courseList"
value='#{requirementEditItemBean.courselist}' var='item'
headerClass="requirementHeader">
<h:column id="dt_courseList_c0">
<f:facet name="header">
<h:outputText id="dt_courseList_c0_ot1"
value="Action"/>
</f:facet>
<h:commandLink id="dt_courseList_c0_col"
value="Del" action="#{requirementEditItemBean.deleteCourseAction}">
<f:param id="dt_courseList_c0_col_p1"
name="selectedCourse" value="#{item.subsectioncourseid}"/>
</h:commandLink>
</h:column>
<h:column id="dt_courseList_c1">
<f:facet name="header">
<h:panelGroup>
<h:outputText id="dt_courseList_c1_ot1"
value="Status"/>
<f:verbatim> </f:verbatim>
</h:panelGroup>
</f:facet>
<h:inputText id="dt_courseList_c1_status"
value="#{item.status}" size="1"/>
</h:column>
<h:column id="dt_courseList_c2">
<f:facet name="header">
<h:outputText id="dt_courseList_c2_ot1"
value="Course"/>
</f:facet>
<h:outputText id="dt_courseList_c2_ot2"
value='#{item.course}'/>
</h:column>
</h:dataTable>
</h:panelGrid>
<f:verbatim>
</DIV>
</f:verbatim>
<h:commandButton id="CIPFormButton"
action="#{RQTreeBacker.modifyTreeAction}" value="Submit"/>
</h:form>
</html>