Class: Wref::Implementations::IdClassUnique

Inherits:
Object
  • Object
show all
Defined in:
lib/wref/implementations/id_class_unique.rb

Instance Method Summary collapse

Constructor Details

#initialize(object) ⇒ IdClassUnique

Returns a new instance of IdClassUnique.



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# File 'lib/wref/implementations/id_class_unique.rb', line 2

def initialize(object)
  @id = object.__id__
  @class_name = object.class.name.to_sym
  ObjectSpace.define_finalizer(object, method(:destroy))
  @unique_id = object.__wref_unique_id__ if object.respond_to?(:__wref_unique_id__)
end

Instance Method Details

#alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wref/implementations/id_class_unique.rb', line 41

def alive?
  if get
    return true
  else
    return false
  end
end

#get ⇒ Object 



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# File 'lib/wref/implementations/id_class_unique.rb', line 15

def get
  return nil if !@class_name || !@id

  begin
    object = ObjectSpace._id2ref(@id)
  rescue RangeError
    destroy
    return nil
  end

  #Some times this class-name will be nil for some reason - knj
  object_class_name = object.class.name

  if !object_class_name || @class_name != object_class_name.to_sym || @id != object.__id__
    destroy
    return nil
  end

  if @unique_id
    destroy
    return nil if !object.respond_to?(:__wref_unique_id__) || object.__wref_unique_id__ != @unique_id
  end

  return object
end

#get! ⇒ Object

Raises:



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# File 'lib/wref/implementations/id_class_unique.rb', line 9

def get!
  object = get
  raise ::Wref::Recycled unless object
  return object
end