Class: Resilience::FSDir::Record

Inherits:
Object
  • Object
show all
Includes:
OnImage
Defined in:
lib/resilience/fs_dir/record.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from OnImage

#image, image, included, restore_pos, #restore_pos, store_pos, #store_pos

Constructor Details

#initialize(attribute) ⇒ Record

Returns a new instance of Record.



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# File 'lib/resilience/fs_dir/record.rb', line 12

def initialize(attribute)
  @attribute = attribute
end

Instance Attribute Details

#attribute ⇒ Object

Returns the value of attribute attribute.



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# File 'lib/resilience/fs_dir/record.rb', line 10

def attribute
  @attribute
end

Class Method Details

.read ⇒ Object 



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# File 'lib/resilience/fs_dir/record.rb', line 16

def self.read
  new(Attribute.read)
end

Instance Method Details

#boundries ⇒ Object 



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# File 'lib/resilience/fs_dir/record.rb', line 31

def boundries
  calc_boundries
  [@key_offset, @key_length, @value_offset, @value_length]
end

#calc_boundries ⇒ Object 



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# File 'lib/resilience/fs_dir/record.rb', line 20

def calc_boundries
  return if @boundries_set
  @boundries_set = true
  
  header         = attribute.unpack('S*')
  @key_offset    = header[2]
  @key_length    = header[3]
  @value_offset  = header[5]
  @value_length  = header[6]
end

#calc_flags ⇒ Object 



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# File 'lib/resilience/fs_dir/record.rb', line 36

def calc_flags
  return if @flags_set
  @flags_set = true
  
  @flags = attribute.unpack('S*')[4]
end

#flags ⇒ Object 



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# File 'lib/resilience/fs_dir/record.rb', line 43

def flags
  calc_flags
  @flags
end

#key ⇒ Object 



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# File 'lib/resilience/fs_dir/record.rb', line 48

def key
  ko, kl, vo, vl = boundries
  attribute.unpack('C*')[ko...ko+kl].pack('C*')
end

#value ⇒ Object 



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# File 'lib/resilience/fs_dir/record.rb', line 53

def value
  ko, kl, vo, vl = boundries
  attribute.unpack('C*')[vo..-1].pack('C*')
end