public void render(final Listitem item, final Object data, final int index) throws Exception {
final Listbox listbox = (Listbox) item.getParent();
final int size = listbox.getModel().getSize();
// B70-ZK-2555: in order to handle dynamic template name
final String subtype =
item instanceof Listgroup ? "group" : item instanceof Listgroupfoot ? "groupfoot" : null;
final Template tm = resolveTemplate(listbox, item, data, index, size, "model", subtype);
if (tm == null) {
item.setLabel(Objects.toString(data));
item.setValue(data);
} else {
final ForEachStatus iterStatus =
new AbstractForEachStatus() { // provide iteration status in this context
private static final long serialVersionUID = 1L;
public int getIndex() {
return index;
}
public Object getCurrent() {
return data;
}
public Integer getEnd() {
return size;
}
};
final String var = (String) tm.getParameters().get(EACH_ATTR);
final String varnm = var == null ? EACH_VAR : var; // var is not specified, default to "each"
final String itervar = (String) tm.getParameters().get(STATUS_ATTR);
final String itervarnm =
itervar == null
? (var == null ? EACH_STATUS_VAR : varnm + STATUS_POST_VAR)
: itervar; // provide default value if not specified
// bug 1188, EL when nested var and itervar
Object oldVar = listbox.getAttribute(varnm);
Object oldIter = listbox.getAttribute(itervarnm);
listbox.setAttribute(varnm, data);
listbox.setAttribute(itervarnm, iterStatus);
final Component[] items = filterOutShadows(listbox, tm.create(listbox, item, null, null));
// Bug ZK-2789: do not use setAttribute when actually trying to removeAttribute
if (oldVar != null) {
listbox.setAttribute(varnm, oldVar);
} else {
listbox.removeAttribute(varnm);
}
if (oldIter != null) {
listbox.setAttribute(itervarnm, oldIter);
} else {
listbox.removeAttribute(itervarnm);
}
if (items.length != 1)
throw new UiException("The model template must have exactly one item, not " + items.length);
final Listitem nli = (Listitem) items[0];
nli.setAttribute(BinderCtrl.VAR, varnm); // for the converter to get the value
// ZK-2552
recordRenderedIndex(listbox, items.length);
nli.setAttribute(AbstractRenderer.IS_TEMPLATE_MODEL_ENABLED_ATTR, true);
nli.setAttribute(
AbstractRenderer.CURRENT_INDEX_RESOLVER_ATTR,
new IndirectBinding() {
public Binder getBinder() {
return BinderUtil.getBinder(nli, true);
}
@SuppressWarnings("unchecked")
public void setValue(BindELContext ctx, Object value) {
int idx = BindListitemRenderer.this.getRenderedIndex(listbox, nli.getIndex());
ListModel<?> listmodel = listbox.getListModel();
if (idx >= 0 && idx < listmodel.getSize()) {
if (listmodel instanceof ListModelArray) {
((ListModelArray<Object>) listmodel).set(idx, value);
} else if (listmodel instanceof ListModelList<?>) {
((ListModelList<Object>) listmodel).set(idx, value);
}
} else {
// out of range, should ignore to compatible with old version(when we didn't
// implement save) or throw exception?
}
}
public Component getComponent() {
return nli;
}
public Object getValue(BindELContext ctx) {
return listbox
.getModel()
.getElementAt(
BindListitemRenderer.this.getRenderedIndex(listbox, nli.getIndex()));
}
});
addItemReference(
listbox, nli, index, varnm); // kept the reference to the data, before ON_BIND_INIT
nli.setAttribute(itervarnm, iterStatus);
// sync open state
if (nli instanceof Listgroup && item instanceof Listgroup) {
((Listgroup) nli).setOpen(((Listgroup) item).isOpen());
}
// ZK-1787 When the viewModel tell binder to reload a list, the other component that bind a
// bean in the list will reload again
// move TEMPLATE_OBJECT (was set in resoloveTemplate) to current for check in
// addTemplateTracking
Object obj = item.removeAttribute(TemplateResolver.TEMPLATE_OBJECT);
// Bug ZK-2789: do not use setAttribute when actually trying to removeAttribute
if (obj != null) {
nli.setAttribute(TemplateResolver.TEMPLATE_OBJECT, obj);
} else {
nli.removeAttribute(TemplateResolver.TEMPLATE_OBJECT);
}
// add template dependency
addTemplateTracking(listbox, nli, data, index, size);
if (nli.getValue() == null) // template might set it
nli.setValue(data);
item.setAttribute(Attributes.MODEL_RENDERAS, nli);
// indicate a new item is created to replace the existent one
item.detach();
}
}
