Prime faces ajax filtering

controller.java

  private Date fromDate;
  private Date toDate;
  
  public void filterDataTable() {
      items = getFacade().findAll();
      for (Iterator<ActivityData> iterator = items.iterator(); iterator.hasNext();) {
          Date date = iterator.next().getDate();
          if (getFromDate() != null && date.before(getFromDate())
              || getToDate() != null && date.after(getToDate())) {
              iterator.remove();
          }
      }
  }
    

primefaces.jsp

                    <p:column filterBy="#{item.date}">
                        <f:facet name="filter">
                            <p:calendar id="from" value="#{adminActivityDataController.fromDate}" styleClass="calendarFilter">
                                <p:ajax event="dateSelect" listener="#{adminActivityDataController.dateRangeFilter()}" update="activityDataTable"/>
                            </p:calendar>
                            <p:calendar id="to" value="#{adminActivityDataController.toDate}" styleClass="calendarFilter">
                                <p:ajax event="dateSelect" listener="#{adminActivityDataController.dateRangeFilter()}" update="activityDataTable"/>
                            </p:calendar>
                        </f:facet>
                        <h:outputText value="#{item.date}">
                            <f:convertDateTime pattern="dd/MM/yyyy" />
                        </h:outputText>
                    </p:column>