Contents

require 'active_support/dependencies'

module ActiveSupport
  # This module provides an internal implementation to track descendants
  # which is faster than iterating through ObjectSpace.
  module DescendantsTracker
    @@direct_descendants = Hash.new { |h, k| h[k] = [] }

    def self.direct_descendants(klass)
      @@direct_descendants[klass]
    end

    def self.descendants(klass)
      @@direct_descendants[klass].inject([]) do |descendants, _klass|
        descendants << _klass
        descendants.concat _klass.descendants
      end
    end

    def self.clear
      @@direct_descendants.each do |klass, descendants|
        if ActiveSupport::Dependencies.autoloaded?(klass)
          @@direct_descendants.delete(klass)
        else
          descendants.reject! { |v| ActiveSupport::Dependencies.autoloaded?(v) }
        end
      end
    end

    def inherited(base)
      self.direct_descendants << base
      super
    end

    def direct_descendants
      DescendantsTracker.direct_descendants(self)
    end

    def descendants
      DescendantsTracker.descendants(self)
    end
  end
end

Version data entries

43 entries across 43 versions & 3 rubygems

Version	Path
social_url_stats-0.0.1	vendor/ruby/1.9.1/gems/activesupport-3.0.0/lib/active_support/descendants_tracker.rb
activesupport-3.0.20	lib/active_support/descendants_tracker.rb
activesupport-3.0.19	lib/active_support/descendants_tracker.rb
activesupport-3.0.18	lib/active_support/descendants_tracker.rb
activesupport-3.0.17	lib/active_support/descendants_tracker.rb
activesupport-3.0.16	lib/active_support/descendants_tracker.rb
activesupport-3.0.15	lib/active_support/descendants_tracker.rb
activesupport-3.0.14	lib/active_support/descendants_tracker.rb
activesupport-3.0.13	lib/active_support/descendants_tracker.rb
activesupport-3.0.13.rc1	lib/active_support/descendants_tracker.rb
activesupport-3.0.12	lib/active_support/descendants_tracker.rb
activesupport-3.0.12.rc1	lib/active_support/descendants_tracker.rb
activesupport-3.0.11	lib/active_support/descendants_tracker.rb
messagebus_ruby_api-0.4.7	spec/ruby/1.9.1/gems/activesupport-3.0.9/lib/active_support/descendants_tracker.rb
messagebus_ruby_api-0.4.4	spec/ruby/1.9.1/gems/activesupport-3.0.9/lib/active_support/descendants_tracker.rb
activesupport-3.0.10	lib/active_support/descendants_tracker.rb
activesupport-3.0.10.rc1	lib/active_support/descendants_tracker.rb
activesupport-3.0.9	lib/active_support/descendants_tracker.rb
activesupport-3.0.9.rc5	lib/active_support/descendants_tracker.rb
activesupport-3.0.9.rc4	lib/active_support/descendants_tracker.rb