Class: AlphaSimprini::Heap::Packer

Inherits:
Object
  • Object
show all
Defined in:
lib/alpha_simprini/packer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Packer

Returns a new instance of Packer.



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# File 'lib/alpha_simprini/packer.rb', line 12

def initialize
  @classes = {}
  @objects = {}
  @named_objects = {}
  @literals = []
end

Instance Attribute Details

#classes ⇒ Object (readonly)

Returns the value of attribute classes.



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# File 'lib/alpha_simprini/packer.rb', line 11

def classes
  @classes
end

#named_objects ⇒ Object (readonly)

Returns the value of attribute named_objects.



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# File 'lib/alpha_simprini/packer.rb', line 11

def named_objects
  @named_objects
end

#objects ⇒ Object (readonly)

Returns the value of attribute objects.



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# File 'lib/alpha_simprini/packer.rb', line 11

def objects
  @objects
end

Instance Method Details

#pack(object, named = nil) ⇒ Object 



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# File 'lib/alpha_simprini/packer.rb', line 19

def pack(object, named=nil)
  pack_object(object, pack_class(object.class), named)
end

#pack_class(klass) ⇒ Object 



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# File 'lib/alpha_simprini/packer.rb', line 66

def pack_class(klass)
  @classes[klass.name] ||= @classes.size
end

#pack_object(object, class_reference, named = nil) ⇒ Object 



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# File 'lib/alpha_simprini/packer.rb', line 23

def pack_object(object, class_reference, named=nil)
  return object.object_id if @objects[object.object_id]
  @objects[object.object_id] = reference = {} 
   if object.is_a?(Hash)
    reference.merge!\
      CLASS => class_reference,
      ATTRIBUTES => object.inject({}) {|hash, (name, object)| hash[pack(name)] = pack(object); hash }
  elsif object.is_a?(Array)
    reference.merge!\
      CLASS => class_reference,
      ATTRIBUTES => object.map{|item| pack(item) }
  elsif object.is_a?(Numeric)
    reference.merge!\
      CLASS => pack_class(Numeric),
      ATTRIBUTES => @literals.count
    @literals << object
  elsif object.is_a?(Symbol)
    reference.merge!\
      CLASS => pack_class(String),
      ATTRIBUTES => @literals.count
    @literals << object.to_s
  elsif object.is_a?(String)
    reference.merge!\
      CLASS => class_reference,
      ATTRIBUTES => @literals.count
    @literals << object
  else
    reference.merge!\
      CLASS => class_reference,
      ATTRIBUTES => (object.instance_variables.inject({}) do |hash, name|
        value_to_pack = object.instance_variable_get(name)
        if value_to_pack == object
          hash[pack(name)] = object.object_id
        else
          hash[pack(name)] = pack(value_to_pack)
        end
        hash
      end)
  end
  @named_objects[pack(named)] = object.object_id if named
  object.object_id
end

#to_h ⇒ Object 



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# File 'lib/alpha_simprini/packer.rb', line 70

def to_h
  {
    CLASSES => @classes,
    OBJECTS => @objects,
    NAMED_OBJECTS => @named_objects,
    LITERALS => @literals
  }
end