public void setParent(Feed parent) {
this.parent = parent;
setParentId(parent == null ? null : parent.getId());
}
public String getPath() {
return parent == null ? name : parent.getPath() + "/" + name;
}
public void addChild(Feed feed) {
if (children == null) children = new ArrayList();
feed.setParent(this);
children.add(feed);
}