Class: DataMapper::IdentityMap

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ IdentityMap

Returns a new instance of IdentityMap.



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# File 'lib/data_mapper/identity_map.rb', line 6

def initialize
  @cache = Hash.new { |h,k| h[k] = Support::WeakHash.new }
end

Instance Method Details

#get(klass, key) ⇒ Object 



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# File 'lib/data_mapper/identity_map.rb', line 10

def get(klass, key)
  @cache[klass][key]
end

#set(instance) ⇒ Object 



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# File 'lib/data_mapper/identity_map.rb', line 14

def set(instance)
  raise "Can't store an instance with a nil key in the IdentityMap" if instance.key == nil
    
  @cache[instance.class][instance.key] = instance
end