"bottom"
                                                 paginatorTemplate="{CurrentPageReport}  {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
                                                 rowsPerPageTemplate="5,10,15"
                                                 selection="#{purchaseOrderController.selectedItems}">  

                                        <p:column selectionBox="true" style="width: 30px;"></p:column>

                         