Hi!

I'm having great pains getting DynaValidatorForm to validate only the
"page=" attributed field elements in my validation.xml file.

It's the usual scenario: one DynaValidatorForm which is completed over
several JSP pages. 
I want validation to occur as each page is submitted, using the
Validator plugin.

However I receive the following NullPointerException when I submit the
first page of my wizard:

2004-09-29 14:30:28 StandardWrapperValve[action]: Servlet.service() for
servlet action threw exception
java.lang.NullPointerException
        at
org.apache.struts.validator.DynaValidatorForm.setPageFromDynaProperty(Dy
naValidatorForm.java:142)
        at
org.apache.struts.validator.DynaValidatorForm.validate(DynaValidatorForm
.java:99)
        at
org.apache.struts.action.RequestProcessor.processValidate(RequestProcess
or.java:921)
        at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
206)
        at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
        at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:237)
        {snip}

I am only attempting to get server side validation working at the
moment. My browser has JavaScript disabled.
I'm using Struts 1.2.4, I've not attempted to try this with Struts 1.1

I've added what I think are the relevant code snippets to the bottom of
this mail - longer snippets are available if needed!

Please could anyone help, or point me to an online working example (with
source!) that can get me past my problems?

Many Thanks in Advance,

Mark.




---------------------------------------------------
struts-config.xml:

  <form-beans>

    <!-- WizardForm form bean -->
    <form-bean name="WizardForm"
type="org.apache.struts.validator.DynaValidatorForm">
      <form-property name="page" type="java.lang.Integer"/>
      <form-property name="firstName" type="java.lang.String"/>
{snip}

    <!-- WizardPage1Submit -->
    <action path="/WizardPage1Submit"
                        type="com.messagelabs.wizard.WizardBaseAction"
                name="WizardForm"
                input="/WEB-INF/web/WizardPage1.jsp"
                scope="session"
                validate="true">
      <forward name="success" path="/WEB-INF/web/WizardPage2.jsp"/>
    </action>

{snip}
---------------------------------------------------

---------------------------------------------------
validation.xml:

    <formset>
        <form name="WizardForm">
            <field property="firstName"
                    depends="required,maxlength"
                    page="1">
                <arg0 key="WizardForm.firstName.displayname"/>
                <arg1 key="${var:maxlength}" name="maxlength"
resource="false"/>
                <var>
                    <var-name>maxlength</var-name>
                    <var-value>64</var-value>
                </var>
            </field>
{snip}
---------------------------------------------------

---------------------------------------------------
wizardpage1.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="/tags/struts-bean" prefix="bean" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>
<%@ taglib uri="/tags/struts-logic" prefix="logic" %>

<html:html>
<head>
<title><bean:message key="WizardPage1.title"/></title>
<html:base/>
</head>
<body bgcolor="white">

<html:hidden property="page" value="1"/>

{snip}
---------------------------------------------------



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