Class: Julewire::Core::Integration::IvarState

Inherits:
Object
  • Object
show all
Defined in:
lib/julewire/core/integration/ivar_state.rb

Instance Method Summary collapse

Constructor Details

#initialize(marker) ⇒ IvarState

Returns a new instance of IvarState.



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# File 'lib/julewire/core/integration/ivar_state.rb', line 8

def initialize(marker)
  @marker = marker
end

Instance Method Details

#fetch(owner) ⇒ Object 



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# File 'lib/julewire/core/integration/ivar_state.rb', line 12

def fetch(owner)
  return unless owner.respond_to?(:instance_variable_get)

  owner.instance_variable_get(@marker)
rescue StandardError
  nil
end

#fetch_or_store(owner) ⇒ Object 



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# File 'lib/julewire/core/integration/ivar_state.rb', line 29

def fetch_or_store(owner)
  existing = fetch(owner)
  return existing if existing

  store(owner, yield)
end

#store(owner, value) ⇒ Object 



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# File 'lib/julewire/core/integration/ivar_state.rb', line 20

def store(owner, value)
  return value unless owner.respond_to?(:instance_variable_set)

  owner.instance_variable_set(@marker, value)
  value
rescue StandardError
  value
end