@Override
public Resource child(String childName) throws NotAuthorizedException, BadRequestException {
if (children == null) {
// attempt to locate singly, ie without loading entire list of children
// first check if it has already been loaded singly
if (singlyLoadedChildItems != null && singlyLoadedChildItems.hasChild(childName)) {
return singlyLoadedChildItems.get(childName);
}
// try to load singly using ChildOf annotation, if present
// childTriValue can be null, the child source object, or a special value indicating no search
Object childTriValue = annoFactory.childOfAnnotationHandler.execute(this, childName);
if (childTriValue == null) {
// return null; // definitely not found
// well, actually. ChildOf can just apply to a certain sort of child, so if its not found
// that doesnt mean that there might not be some othe child
// so we can't assume in any circumstance that a null means not found. Must always fall
// through to ChildrenOf
} else if (childTriValue.equals(ChildOfAnnotationHandler.NOT_ATTEMPTED)) {
// there is no ChildOf method, so fall through to iterating over all children
} else {
// got one!
AnnoResource r = (AnnoResource) childTriValue;
if (singlyLoadedChildItems == null) {
singlyLoadedChildItems = new ResourceList();
}
singlyLoadedChildItems.add(r);
return r;
}
}
for (Resource r : getChildren()) {
if (r.getName().equals(childName)) {
return r;
}
}
return null;
}
