class Spaceship::Base::DataHash

def get(*keys)
  lookup(keys)
end

def initialize(hash)
  @hash = hash || {}
end

def lookup(keys)
  head, *tail = *keys
  if tail.empty?
    @hash[head]
  else
    DataHash.new(@hash[head]).lookup(tail)
  end
end

def set(keys, value)
  raise "'keys' must be an array, got #{keys.class} instead" unless keys.kind_of?(Array)
  last = keys.pop
  ref = lookup(keys) || @hash
  ref[last] = value
end

def to_json(*a)
  h = @hash.dup
  h.delete(:application)
  h.to_json(*a)
end