Update Datalist value in primefaces - jsf

Question

i am using primefaces datalist , it contains list binded with it ,, datalist contains radio button i want to change / update values of that binded list i tried this code but its not working
<p:dataList var="question" value="#{formTableBean.question}"
type="definition" >
<h:outputText value="#{question.text}"
style="font-size:14px;font-weight:bold" />
<h:panelGrid columns="2" width="100%" style="margin-bottom:10px"
cellpadding="10">
<h:outputText value="Options: " />
<p:selectOneRadio id="options" value="#{question.answer}" >
<f:selectItem itemLabel="Strongly Agree" itemValue="1" />
<f:selectItem style="margin-right:20px" itemLabel="Agree"
itemValue="2" />
<f:selectItem style="margin-right:20px" itemLabel="Disagree"
itemValue="3" />
<f:selectItem itemLabel="Strongly Disagree" itemValue="4" />
<p:spacer width="100"></p:spacer>
</p:selectOneRadio>
</h:panelGrid>
</p:dataList>
bean class package Bean;
import java.util.ArrayList;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.bean.ViewScoped;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import com.liferay.portal.model.User;
import com.liferay.portal.service.UserLocalServiceUtil;
import DAO.Dao;
import DTO.FormDTO;
import DTO.QuestionDTO;
#ManagedBean
#ViewScoped
public class FormTableBean {
FormDTO selectedForm;
List<QuestionDTO> question;
public List<QuestionDTO> getQuestion() {
return question;
}
public void setQuestion(List<QuestionDTO> question) {
this.question = question;
}
public FormDTO getSelectedForm() {
return selectedForm;
}
public void setSelectedForm(FormDTO selectedForm) {
this.selectedForm = selectedForm;
}
boolean renderFormPanal = false;
public boolean getRenderFormPanal() {
return renderFormPanal;
}
public void setRenderFormPanal(boolean renderFormPanal) {
this.renderFormPanal = renderFormPanal;
}
List<FormDTO> formList;
public List<FormDTO> getFormList() {
return formList;
}
public void setFormList(List<FormDTO> formList) {
this.formList = formList;
}
Dao daoclass = new Dao();
public FormTableBean() {
User u = getCurrentUser();
String email = u.getEmailAddress();
int eid = daoclass.emailToEid(email);
formList = new ArrayList<FormDTO>();
formList = daoclass.getAllForm(eid);
}
protected User getCurrentUser() {
User u = null;
FacesContext fc = FacesContext.getCurrentInstance();
ExternalContext externalContext = fc.getExternalContext();
Long id = Long.parseLong(externalContext.getUserPrincipal().getName());
try {
u = UserLocalServiceUtil.getUserById(id);
} catch (com.liferay.portal.kernel.exception.PortalException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (com.liferay.portal.kernel.exception.SystemException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return u;
}
public void showForm() {
question = new ArrayList<QuestionDTO>();
setRenderFormPanal(true);
int formid = selectedForm.getFid();
question = daoclass.getQuestion(formid);
}
public void saveForm() {
for (int i = 0; i < question.size(); i++) {
System.out.print("QID:"+question.get(i).getAnswer());
}
}
}
i want to get answers value updated in list .please help me

Answer 1

Use Ajax on p:selectOneRadio to submit the answer every time user selects an answer.
<p:selectOneRadio id="options" value="#{question.answer}" >
<p:ajax event="valueChange" update="any_component's_id_you_want_to_update" />
....
....
</p:selectOneRadio>