TestBean tb = (TestBean) itemId;
String identifier = "Item " + itemId + "/" + columnId;
Button btnCol3 = new NativeButton(identifier);
btnCol3.setId("cacheTestButton-" + tb.getCol1() + "-"
+ tb.getCol2());
btnCol3.addClickListener(new Button.ClickListener() {
@Override
public void buttonClick(ClickEvent event) {
log.log("Button " + event.getButton().getCaption()
+ " clicked. Row index: "
+ indexOfId(source, itemId));