class AWS::Record::Model::Attributes::SortableIntegerAttr

Public Class Methods

deserialize(string_value, options = {}) click to toggle source

# File lib/aws/record/model/attributes.rb, line 80
def self.deserialize string_value, options = {}
  offset_and_precision(options) do |offset,precision|
    string_value.to_i - offset
  end
end

new(name, options = {}) click to toggle source

# File lib/aws/record/model/attributes.rb, line 42
def initialize name, options = {}
  range = options[:range]
  raise ArgumentError, "missing required option :range" unless range
  raise ArgumentError, ":range should be a integer range" unless
    range.is_a?(Range) and range.first.is_a?(Integer)
  super(name, options)
end

serialize(integer, options = {}) click to toggle source

Returns a serialized representation of the integer value suitable for storing in SimpleDB.

attribute.serialize(123)
#=> '123'

# padded to the correct number of digits
attribute.serialize('123', :range => (0..10_000)
#=> '00123'

# offset applied to make all values positive
attribute.serialize('-55', :range => (-100..10_000)
#=> '00045'

@param [Integer] integer The number to serialize. @param [Hash] options @option options [required,Range] :range A range that represents the

minimum and maximum values this integer can be.
The returned value will have an offset applied (if min is
less than 0) and will be zero padded.

@return [String] A serialized representation of the integer.

# File lib/aws/record/model/attributes.rb, line 71
def self.serialize integer, options = {}
  expect(Integer, integer) do
    check_range(integer, options)
    offset_and_precision(options) do |offset,precision|
      "%0#{precision}d" % (integer.to_i + offset)
    end
  end
end

Protected Class Methods

check_range(number, options) click to toggle source

# File lib/aws/record/model/attributes.rb, line 99
def self.check_range number, options
  unless options[:range].include?(number)
    msg = "unable to serialize `#{number}`, falls outside " +
     "the range #{options[:range]}"
    raise msg
  end
end

offset_and_precision(options) { |offset, precision| ... } click to toggle source

# File lib/aws/record/model/attributes.rb, line 87
def self.offset_and_precision options, &block

  min = options[:range].first
  max = options[:range].last

  offset = min < 0 ? min * -1 : 0
  precision = (max + offset).to_s.length

  yield(offset, precision)

end