/**
* Perform a sanity check on the existing index to verify that it's valid. If the index is
* corrupt, we'll force a rebuild of it.
*
* @return
*/
protected boolean indexCorrupt() {
Index index = getIndex();
if (index == null) {
return true;
}
List<String> categories = index.getCategories();
return categories == null || categories.isEmpty();
};
