In user descriptor doesn't work pageContext.getOut("")

Question

I have a next question. In jsp page I use menu for 2 users ( tutor and student) in dependence on role I choose which from menu files I should include. Smth like this

<c:if test="${role eq 'Tutor'}">
                <c:import url="/page/menuForTutor.html" charEncoding="UTF-8"/>
</c:if>
<c:if test="${role eq 'Student'}">
             <c:import url="/page/menuForStudent.html" charEncoding="UTF-8"/>
</c:if>

I should use user descriptor

public class MenuTag extends TagSupport{

    private static final String PARAM_ROLE_TUTOR = "Tutor";
    private static final String PARAM_ROLE_STUDENT = "Student";

    @Override
    public int doStartTag(){
        HttpServletRequest request = (HttpServletRequest)pageContext.
                                                   getRequest();
        HttpSession session = request.getSession();
        String role = (String) session.getAttribute("role");
        if (PARAM_ROLE_TUTOR.equals(role)){
            try {
                pageContext.getOut().print("<c:import url=\"/page/menuForTutor.html\" charEncoding=\"UTF-8\"/>");
            } catch (IOException ex) {
                Logger.getLogger(MenuTag.class.getName()).log(Level.SEVERE, null, ex);
            }
        } else if(PARAM_ROLE_STUDENT.equals(role)){
        }
        return SKIP_BODY;
    }       
}

When I use debag I see that I do all steps but menu for tutor wasn't showed on jsp. Any ideas?

where have you set "session.putValue("role", PARAM_ROLE_TUTOR);" — moskito-x, May 26 '12 at 13:58

moskito-x · Accepted Answer · 2012-06-02T20:23:34.053

1

I assume that session("role") is set in another code part!

set JspWriter out = pageContext.getOut();

is something like following in the code

JspFactory  factory     = JspFactory.getDefaultFactory();
PageContext pageContext = factory.getPageContext(
this,
request,
response,
null,  // errorPageURL
false, // needsSession
JspWriter.DEFAULT_BUFFER,
true   // autoFlush
);

    ....
            JspWriter   out     = pageContext.getOut();
            HttpSession session = request.getSession();
            String role = (String) session.getAttribute("role");
            if (PARAM_ROLE_TUTOR.equals(role)){
                try {
                    out.println("<c:import url=\"/page/menuForTutor.html\" charEncoding=\"UTF-8\"/>");
                    out.flush();
                    // Evaluate the body if there is one
                    return EVAL_BODY_BUFFERED;
.......

else return SKIP_BODY;

EDIT see code: you have to "return EVAL_BODY_BUFFERED;"

edited Jun 02 '12 at 20:23

answered May 26 '12 at 14:18

moskito-x

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No, I use pageContext as field class TagSupport. And when I close out I don't on page anything, I think that problem in <с:import> – Ray May 26 '12 at 15:49
and when you call out.flush(); – moskito-x May 26 '12 at 15:53
and when I call out.flash() also. I can print on jsp different numbers and string but othe file doesn't want(( – Ray May 26 '12 at 16:13
Sorry use EVAL_BODY_BUFFERED instaed. – moskito-x Jun 02 '12 at 20:22

In user descriptor doesn't work pageContext.getOut("")

1 Answers1