class ReeMapper::Float

def cast(value)
  if value.is_a?(Numeric)
    value.to_f
  elsif value.is_a?(String)
    begin
      Float(value)
    rescue ArgumentError
      raise ReeMapper::CoercionError.new("is invalid float, got `#{truncate(value.inspect)}`")
    end
  elsif defined?(BigDecimal) && value.is_a?(BigDecimal)
    value.to_f
  else
    raise ReeMapper::TypeError.new("should be a float, got `#{truncate(value.inspect)}`")
  end
end

def db_dump(value)
  serialize(value)
end

def db_load(value)
  cast(value)
end

def serialize(value)
  if value.is_a?(Float)
    value
  else
    raise ReeMapper::TypeError.new("should be a float, got `#{truncate(value.inspect)}`")
  end
end