Re: JSTL and DynaValidatorForm

[Alexander Kirsch]

Hallo all!

Kris Schneider wrote:
Are you using a JSP 2.0 container (like Tomcat 5)? If not, you can't use JSTL
1.1, you have to use JSTL 1.0. For a quick sanity check, what do you get with
the following:
I'am using the JSP 2.0 Container Tomcat 5.0.14

<h1>JSTL: <c:out value="${lvform.map.method}"/></h1>
<h1>Struts: <bean:write name="lvform" property="method"/></h1>
The Struts-Tags work, but not the JSTL-Tags!

If you really are using a JSP 2.0 container, you can also try:

<h1>JSP: ${lvform.map.method}</h1>

Also make sure you're using a Servlet 2.4 deployment descriptor:

<web-app xmlns="http://java.sun.com/xml/ns/j2ee";
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";
         version="2.4">
  ...
</web-app>
Since I change the deployment discriptor, there is a exception in all JSTL Tags.

javax.servlet.jsp.el.ELException: Unable to find a value for "map" in object of 
class "org.apache.struts.validator.DynaValidatorForm" using operator "."
org.apache.commons.el.Logger.logError(Logger.java:481)
org.apache.commons.el.Logger.logError(Logger.java:498)
org.apache.commons.el.Logger.logError(Logger.java:611)
org.apache.commons.el.ArraySuffix.evaluate(ArraySuffix.java:340)
org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:263) 
org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:190)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:936)
org.apache.jsp.pages.lv_jsp._jspx_meth_html_html_0(lv_jsp.java:143)
org.apache.jsp.pages.lv_jsp._jspService(lv_jsp.java:101)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856) 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856) 
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1014)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:417) 
org.apache.struts.action.RequestProcessor.processActionForward(RequestProcessor.java:390)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:271)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:492)
javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

Quoting Alexander Kirsch <[EMAIL PROTECTED]>:


Hallo all,

I have some problems with the JSTL 1.1 (From SUN jwsdp 1.3) Tags together
with
Struts 1.1 DynaValidatorForms.
I have defined the following DynaValidatorForm:

<form-bean name="lvForm"
type="org.apache.struts.validator.DynaValidatorForm">
        ...
        <form-property name="method" type="java.lang.String"/>
        ...
</form-bean>
The Form is populated by an Action:

public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
        DynaValidatorForm lvform = (DynaValidatorForm) form;
        ...
        lvform.set("method", "add");
        ...
        request.setAttribute(mapping.getAttribute(), lvform);
        return mapping.findForward("continue");
}
After this the Fields in the Form-JSP are filled correct.

Depending on what method I use I want to output different messages.

For this I tried to use these JSTL-Tags:

<c:choose>
    <c:when test="${lvForm.map.method == 'update'}">
        <h1><bean:message key="lvform.update"/></h1>
    </c:when>
    <c:when test="${lvForm.map.method == 'delete'}">
        <h1><bean:message key="lvform.delete"/></h1>
    </c:when>
    <c:otherwise>
        <h1><bean:message key="lvform.add"/></h1>   
    </c:otherwise>        
</c:choose>
But I allways run into the otherwise tree.

I also tries this without success:

<c:when test="${lvForm.map['method'] == 'update'}">
   <h1><bean:message key="lvform.update"/></h1>
</c:when>
So I hope that anybody can help me to solve this problem.

Kind Regards and thank you very much

Alexander Kirsch


Kind Regards and thank you very much

Alexander Kirsch

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