public static UIComponent findPersistent(
FacesContext context, ServletRequest req, UIComponent parent, String id) throws Exception {
if (context == null) context = FacesContext.getCurrentInstance();
BodyContent body = null;
if (parent == null) {
UIComponentClassicTagBase parentTag =
(UIComponentClassicTagBase) req.getAttribute("caucho.jsf.parent");
parent = parentTag.getComponentInstance();
body = parentTag.getBodyContent();
}
if (parent != null) {
List<UIComponent> children = parent.getChildren();
int size = children.size();
String prevId = null;
for (int i = 0; i < size; i++) {
UIComponent child = children.get(i);
if (id.equals(child.getId())) {
if (body != null) addVerbatim(parent, prevId, body);
return child;
}
if (child.getId() != null) prevId = child.getId();
}
}
return null;
}
private static void addChild(UIComponent parent, String prevId, UIComponent child) {
if (parent != null) {
List<UIComponent> children = parent.getChildren();
int size = children.size();
boolean hasPrev = prevId == null;
int i = 0;
for (; i < size; i++) {
UIComponent oldChild = children.get(i);
if (hasPrev && oldChild.getId() != null) {
children.add(i, child);
return;
} else if (prevId != null && prevId.equals(oldChild.getId())) hasPrev = true;
}
parent.getChildren().add(child);
}
}