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From Giovanni Azua <g...@imc.nl>
Subject adding validation leads to NullPointerException
Date Thu, 29 Nov 2007 11:07:29 GMT
hi,

I have a JSP (snippet below) that works fine without validation, I need 
to conditionally include certain
fields, I prefer that to the other choice of having two different copies 
of slightly similar input form JSP
that I will then have to keep in sync.

Only when I add a validation xml file corresponding to the target Action 
I get the
NullPointerException stacktrace below.

TIA,
regards,
Giovanni

****************************** stacktrace 
***********************************

SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
    at 
org.apache.jsp.jsp.form.formAngleAlgoConf_jsp._jspService(formAngleAlgoConf_jsp.java:105)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
    at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
    at 
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:557)
    at 
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:481)
...
    at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:619)
Nov 29, 2007 12:04:07 PM 
org.apache.tiles.jsp.context.JspTilesRequestContext include
SEVERE: JSPException while including path 
'/jsp/form/formAngleAlgoConf.jsp'.
javax.servlet.jsp.JspException: ServletException while including page.
    at org.apache.tiles.jsp.context.JspUtil.doInclude(JspUtil.java:102)
    at 
org.apache.tiles.jsp.context.JspTilesRequestContext.include(JspTilesRequestContext.java:88)
    at 
org.apache.tiles.jsp.context.JspTilesRequestContext.dispatch(JspTilesRequestContext.java:82)
    at 
org.apache.tiles.context.TilesRequestContextWrapper.dispatch(TilesRequestContextWrapper.java:72)
    at 
org.apache.struts2.tiles.StrutsTilesRequestContext.dispatch(StrutsTilesRequestContext.java:87)
    at 
org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:465)
...
    at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
    at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.jasper.JasperException: An exception occurred 
processing JSP page /jsp/form/formAngleAlgoConf.jsp at line 6

3: <%@ taglib prefix="sx" uri="/struts-dojo-tags" %>
4:
5: <s:form action="%{targetAction}" method="post" theme="%{currentTheme}">
6:     <% if (request.getAttribute("buttonLabel").equals("Simulate")) { %>
7:         <!-- fields required only for Simulation -->
8:
9:         <sx:datetimepicker  label="Begin Date" name="beginDate" 
displayFormat="yyyy.MM.dd" toggleType="fade" toggleDuration="500" />

Stacktrace:
    at 
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:524)
    at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:435)
    at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)

****************************** mypage.jsp 
***********************************

<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%@ taglib prefix="sx" uri="/struts-dojo-tags" %>

<s:form action="%{targetAction}" method="post" theme="%{currentTheme}">
    <% if (request.getAttribute("buttonLabel").equals("Simulate")) { %>
        <!-- fields required only for Simulation -->

        <sx:datetimepicker label="Begin Date" name="beginDate" 
displayFormat="yyyy.MM.dd" toggleType="fade" toggleDuration="500" />
        <sx:datetimepicker label="End Date" name="endDate" 
displayFormat="yyyy.MM.dd" toggleType="fade" toggleDuration="500" />
    <% } else { %>       
        <!-- fields required only for CRUD operations -->

        <s:textfield tooltip="Provide a name" label="Name" 
cssStyle="width: 250px;" name="name" />
    <% } %>                   
   
    <sx:datetimepicker label="On Time" tooltip="Provide the On Time" 
name="onTime" type="time" toggleType="fade" toggleDuration="500" />
    <sx:datetimepicker label="Off Time" tooltip="Provide the Off Time" 
name="offTime" type="time" toggleType="fade" toggleDuration="500" />   


// etc etc

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