Getting results for questionnaire JSF

Question

I have just one idea as realize getting user's answers. I decide use List<String> questionsWithAnswers and put in this list pairs like '1_1', '1_2', '1_3', '2_1'. Something like this. But even with this idea I have a problem. And also important I'll use web-service (it's a constraint for using map for example as structure for saving pairs question and answer).

******** My bean ********

    public class TestBean implements Serializable{
    
        private static final long serialVersionUID = 1L;
        
        private List<Test> testList;
        private List<Answer> answerList;
        private List<Subject> subjectList;
        private Map<Question, List<QuestionAnswer>> mapQestionsWithAnswers;
        private List<String> questionAnswerList;
        
        private Long subjectId = 0L;
        private Test test;
//...
}

getTest.xhtml

<c:forEach items="#{test.testBean.mapQestionsWithAnswers}"
                    var="entry">
                    <h:inputHidden value="#{entry.key.questionId}" />
                    <h:outputText value="#{entry.key.question}" rendered="#{not empty entry.value}"/>                   
                    <h:selectManyCheckbox value="#{test.testBean.questionAnswerList}" layout="pageDirection">
                        <f:selectItems value="#{entry.value}" var="ans"
                            itemValue="#{fnc:concat(ans.answer.answerId, entry.key.questionId)}"
                            itemLabel="${ans.answer.answer}" />                         
                    </h:selectManyCheckbox>
                </c:forEach>
                <h:commandButton value="#{msgs['page.content.passtest']}" action="#{test.passTest}" />

For concatination questionId with answerId I use concat. I find this in Concatenate strings in JSF/JSP EL and Javascript

But I cant get value entry.key.questionId inside itemValue="#{fnc:concat(ans.answer.answerId, entry.key.questionId)}"

I don't understand why.

Where can I make a mistake? And I want to ask some source on more logic and simple decision similar problem. Thanks

why areyou using JSTL in a jsf 2 project? Much better to use the jsf `` tag — Steve Atkinson, Nov 17 '12 at 21:09
@SteveAtkinson because I read about problems with output Map in jsf — Ray, Nov 17 '12 at 21:19
where? I've never had problems using maps or lists with ui:repeat. The problem with JSTL tags is that they execute in the wrong part of the lifecycle and cause unexpected results. See http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense — Steve Atkinson, Nov 18 '12 at 08:50
@SteveAtkinson Ok, I try rewrite with . What do you think about my idea with List? May be that's will be the best solution my problem that's why I'm going to use web services — Ray, Nov 18 '12 at 09:39

score 2 · Accepted Answer · answered Nov 20 '12 at 22:42

2

You don't need to concatenate :

itemValue="#{fnc:concat(ans.answer.answerId, entry.key.questionId)}"

could be as simple as :

itemValue="#{ans.answer.answerId}, #{entry.key.questionId}"

answered Nov 20 '12 at 22:42

Alexandre Lavoie

8,711
3
31
72

What do you think about idea with `List` and `JSTL` istead of `ui:repeat`? – Ray Nov 21 '12 at 05:19
I agree that ui:repear and c:forEach are not executed in the same lifecycle so that it can cause problem. – Alexandre Lavoie Nov 21 '12 at 18:48
Do you prefer jstl or jsf tags in case map? – Ray Nov 21 '12 at 20:00
It depend of every project, in your case I think ui:repeat will work better. – Alexandre Lavoie Nov 21 '12 at 20:02

score 1 · Answer 2 · answered Nov 17 '12 at 18:22

1

Why not using your own method to concatenate? You can use a bean named concatenatorBean having method

String customConcat(String str1, String str2) { return str1+"_"+str2; }

Then in getTest.xhtml you can use your own concatenator to solve the problem.

answered Nov 17 '12 at 18:22

Sazzadur Rahaman

6,938
1
30
52

My problem that's I get empty questionAnswerList – Ray Nov 17 '12 at 21:43
How you are initializing questionAnswerList? you can initialize it when creating TestBean (in the constructor of TestBean). – Sazzadur Rahaman Nov 18 '12 at 03:40
I initialize list in constructor TestBean. problem that this list is empty, not null. – Ray Nov 18 '12 at 09:36
If you don't have getter setter of questionAnswerList please add them and try again. – Sazzadur Rahaman Nov 18 '12 at 10:38
can you give me the actual stack trace of the Exception? – Sazzadur Rahaman Nov 18 '12 at 16:36
I think the problem is anywhere else. can you post in more details? – Sazzadur Rahaman Nov 21 '12 at 15:03

Getting results for questionnaire JSF

2 Answers2