Class: Perpetuity::IdentityMap

Inherits:
Object
  • Object
show all
Defined in:
lib/perpetuity/identity_map.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ IdentityMap

Returns a new instance of IdentityMap.



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# File 'lib/perpetuity/identity_map.rb', line 3

def initialize
  @map = Hash.new { |hash, key| hash[key] = {} }
end

Instance Method Details

#<<(object) ⇒ Object 



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# File 'lib/perpetuity/identity_map.rb', line 11

def << object
  klass = object.class
  id = object.instance_variable_get(:@id)
  @map[klass][id] = object
end

#[](klass, id) ⇒ Object 



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# File 'lib/perpetuity/identity_map.rb', line 7

def [] klass, id
  @map[klass][id]
end

#ids_for(klass) ⇒ Object 



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# File 'lib/perpetuity/identity_map.rb', line 17

def ids_for klass
  @map[klass].keys
end