jsf - Refreshing PrimeFaces form element dataTable (code details provided) -

i have search form. after clicking on search button data refreshes, datatable columns not (columns refreshed on second button click). apparently doing wrong. dynamic column code inspired primefaces showcase

myform.xhtml:

<h:form id="my_form">     #{mybean.initbean()}     ...     <h:panelgrid id="main">         <h:panelgrid id="buttons">             <p:commandbutton id="submitsearch"                              value="#{msg['button.execute']}"                              actionlistener="#{mybean.submitsearch}"                              update="resultpanel"/>         </h:panelgrid>     </h:panelgrid>      <h:panelgrid id="resultpanel" border="0">         <p:datatable id="resulttable" var="result" value="#{mybean.searchresults}">             <p:columns value="#{mybean.columns}" var="column" columnindexvar="colindex">                 <f:facet name="header">                     <h:outputtext value="#{column.header}" />                 </f:facet>                 <h:outputtext value="#{result[column.property]}" />             </p:columns>         </p:datatable>     </h:panelgrid> </h:form> 

i've called column calculation method createcolumns() mybean.initbean() , mybean.submitsearch() same result (i see works correctly debugger).

@managedbean("mybean") @scope(value = "session") public class mybean {     private arraylist<hashmap<string,object>> searchresults;     private list<columnmodel> columns;     ...     public void initbean() {         ...         createcolumns(selecteddates);     }      public void submitsearch() {         ...         arraylist<hashmap<string, object>> results = prprepository.getsearchresultbyparams(searchparams);         createcolumns(selecteddates);     }      private void createcolumns(arraylist<string> selecteddates){         columns = new arraylist<columnmodel>();            columns.add(new columnmodel("name", "name"));         columns.add(new columnmodel("amount", "amount"));          (int = 0; < selecteddates.size(); i++) {             columns.add(new columnmodel(selecteddates.get(i), "date" + i));         }          setcolumns(columns);     }      public list<columnmodel> getcolumns() {         return columns;     }      public void setcolumns(list<columnmodel> columns) {         this.columns = columns;     } } 

additional information: using:

• oracle's implementation of jsf 2.1 specification
• javaserver pages api 2.2
• springframework 3.1.2 (incl. spring-context, spring-web)
• glassfish javax.annotation 3.1.1

the problem columns calculted once time in org.primefaces.component.datatable.datatabe

public list<uicolumn> getcolumns() {        // if(columns == null) {                  columns = new arraylist<uicolumn>();             facescontext context = getfacescontext();             char separator = uinamingcontainer.getseparatorchar(context);                         for(uicomponent child : this.getchildren()) {                 if(child instanceof column) {                     columns.add((uicolumn) child);                 }                 else if(child instanceof columns) {                     columns uicolumns = (columns) child;                                         string uicolumnsclientid = uicolumns.getclientid(context);                     uicolumns.updatemodel(); /* missed code */                     for(int i=0; < uicolumns.getrowcount(); i++) {                         dynamiccolumn dynacolumn = new dynamiccolumn(i, uicolumns);                         dynacolumn.setcolumnkey(uicolumnsclientid + separator + i);                         columns.add(dynacolumn);                     }                 }             }        // }                 return columns;     } 

you comment , overwrite class file, or find datatable object , setcolumns null inside createcolumns method