Module: DocumentRecord::Serializer

Defined in:
lib/document_record.rb

Constant Summary collapse

MARSHALL_VERSION = 
0
MESSAGEPACK_VERSION = 
1
DEFAULT_VERSION = 
1

Class Method Summary collapse

Class Method Details

.dump(object, options = {}) ⇒ Object 



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# File 'lib/document_record.rb', line 10

def self.dump object, options = {}
  version = DEFAULT_VERSION
  version = options[:force_version] if options.has_key? :force_version

  binary_dump = 
    case version 
      when 0 then 
        Marshal.dump object
      when 1 then
        object.to_hash.to_bson
      else 
        raise "No serialization version found: #{ version }"
    end

  unless options.has_key? :no_version and options[:no_version]
    stamp = [68, 82, version].pack 'c2S'  # DR<version> In 4 bits
    binary_dump.insert( 0, stamp )
  end

  Base64.encode64 binary_dump
end

.load(data) ⇒ Object 



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# File 'lib/document_record.rb', line 31

def self.load data
  decoded = Base64.decode64 data rescue nil
  version = 0

  if decoded.start_with? "DR"  # Has version Stamp
    version = decoded[2,2].unpack('S').pop # Gets the Version
    decoded[0...4] = '' # Removes version stamp
  end
  
  case version
    when 0 then
      Marshal.load decoded rescue nil
    when 1 then
      Hash.from_bson( StringIO.new( decoded ) )
    else 
      raise "Unrecognized version #{version}"
  end
end