Module: Structure::ClassMethods

Defined in:
lib/structure/double.rb,
lib/structure/class_methods.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#attribute_names ⇒ Object (readonly)

Returns the value of attribute attribute_names.



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# File 'lib/structure/class_methods.rb', line 5

def attribute_names
  @attribute_names
end

Class Method Details

.extended(base) ⇒ Object 



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# File 'lib/structure/class_methods.rb', line 7

def self.extended(base)
  base.instance_variable_set :@attribute_names, []
end

Instance Method Details

#__overwrite_initialize__ ⇒ Object 



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# File 'lib/structure/class_methods.rb', line 43

def __overwrite_initialize__
  class_eval do
    unless method_defined?(:__custom_initialize__)
      define_method :__custom_initialize__ do |*args|
        @__mutex__ = ::Thread::Mutex.new
        __original_initialize__(*args)
      end
    end

    return if instance_method(:initialize) ==
              instance_method(:__custom_initialize__)

    alias_method :__original_initialize__, :initialize
    alias_method :initialize, :__custom_initialize__
  end
end

#attribute(name, &block) ⇒ Object 



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# File 'lib/structure/class_methods.rb', line 11

def attribute(name, &block)
  name = name.to_s

  if name.chomp!('?')
    module_eval <<-CODE, __FILE__, __LINE__ + 1
      def #{name}?
        #{name}
      end
    CODE
  end

  module_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}
      @__mutex__.synchronize {
        return @#{name} if defined?(@#{name})

        @#{name} = __#{name}__
        @#{name}.freeze unless @#{name}.is_a?(Structure)

        @#{name}
      }
    end
  CODE

  define_method "__#{name}__", block
  private "__#{name}__"

  @attribute_names << name

  name.to_sym
end

#double ⇒ Object 



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# File 'lib/structure/double.rb', line 5

def double
  klass = Class.new(self)

  (
    private_instance_methods(false) +
    protected_instance_methods(false) -
    [:initialize]
  ).each do |name|
    klass.send :undef_method, name
  end

  klass.module_eval do
    def initialize(data = {})
      data.each do |key, value|
        unless value.is_a?(Structure) ||
               (defined?(::RSpec::Mocks::Double) &&
                value.is_a?(::RSpec::Mocks::Double))
          value.freeze
        end

        instance_variable_set :"@#{key}", value
      end
    end

    attribute_names.each do |name|
      module_eval <<-CODE, __FILE__, __LINE__ + 1
        def __#{name}__
          @#{name}
        end
      CODE
      private "__#{name}__"
    end

    module_eval(&Proc.new) if block_given?
  end

  class << klass
    undef_method :double
  end

  klass
end