class ActiveSupport::XmlMini_NokogiriSAX::HashBuilder

def characters(string)
  current_hash[CONTENT_KEY] << string
end

def current_hash
  @hash_stack.last
end

def end_document
  raise "Parse stack not empty!" if @hash_stack.size > 1
end

def end_element(name)
  if current_hash.length > current_hash.delete(HASH_SIZE_KEY) && current_hash[CONTENT_KEY].blank? || current_hash[CONTENT_KEY] == ""
    current_hash.delete(CONTENT_KEY)
  end
  @hash_stack.pop
end

def error(error_message)
  raise error_message
end

def start_document
  @hash = {}
  @hash_stack = [@hash]
end

def start_element(name, attrs = [])
  new_hash = { CONTENT_KEY => +"" }.merge!(Hash[attrs])
  new_hash[HASH_SIZE_KEY] = new_hash.size + 1
  case current_hash[name]
  when Array then current_hash[name] << new_hash
  when Hash  then current_hash[name] = [current_hash[name], new_hash]
  when nil   then current_hash[name] = new_hash
  end
  @hash_stack.push(new_hash)
end