Module: Lims::Core::Persistence::IdentityMap

Included in:
Class, IdentityMapClass
Defined in:
lib/lims-core/persistence/identity_map.rb

Overview

Mixing giving an identity map behavior ie a map (both way) between id and object

Defined Under Namespace

Classes: Class, DuplicateError, DuplicateIdError, DuplicateObjectError

Instance Method Summary collapse

Instance Method Details

#id_for(object, &block) ⇒ Object

Look for the id associated to an object and yield it to the block if found.



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# File 'lib/lims-core/persistence/identity_map.rb', line 24

def id_for(object, &block)
  @object_to_id[object].andtap(&block)
end

#initialize(*args, &block) ⇒ Object 



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# File 'lib/lims-core/persistence/identity_map.rb', line 43

def initialize(*args, &block)
  super(*args, &block)
  @id_to_object = {}
  @object_to_id = {}
end

#map_id_object(id, object) ⇒ Object

bound an id to an object

Raises:



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# File 'lib/lims-core/persistence/identity_map.rb', line 35

def map_id_object(id, object)
  return nil unless id && object
  raise DuplicateIdError, id unless @id_to_object.fetch(id, object).equal? object
  raise DuplicateObjectError, object unless  @object_to_id.fetch(object, id).equal? id
  @id_to_object[id] = object
  @object_to_id[object] = id
end

#object_for(id, &block) ⇒ Object

Look for the object associated to an object and yield it to the block if found.



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# File 'lib/lims-core/persistence/identity_map.rb', line 30

def object_for(id, &block)
  @id_to_object[id].andtap(&block)
end