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author | Gonçalo Silva <goncalossilva@gmail.com> | 2010-06-30 23:01:30 +0100 |
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committer | Gonçalo Silva <goncalossilva@gmail.com> | 2010-06-30 23:01:30 +0100 |
commit | d2c633ba0bfb7baacdee89a46d7d036d24c68817 (patch) | |
tree | 8f0974852b51597652e6ae73da26f3eb80fe878b /activesupport/lib/active_support/descendants_tracker.rb | |
parent | 92c0f17d6d2a958d3a6285b0e5408e9e0e7122e1 (diff) | |
parent | c63cf7bf0db708fe46a929cf57649ab5a92034af (diff) | |
download | rails-d2c633ba0bfb7baacdee89a46d7d036d24c68817.tar.gz rails-d2c633ba0bfb7baacdee89a46d7d036d24c68817.tar.bz2 rails-d2c633ba0bfb7baacdee89a46d7d036d24c68817.zip |
Merge branch 'master' of http://github.com/rails/rails
Diffstat (limited to 'activesupport/lib/active_support/descendants_tracker.rb')
-rw-r--r-- | activesupport/lib/active_support/descendants_tracker.rb | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/descendants_tracker.rb b/activesupport/lib/active_support/descendants_tracker.rb new file mode 100644 index 0000000000..a587d7770c --- /dev/null +++ b/activesupport/lib/active_support/descendants_tracker.rb @@ -0,0 +1,39 @@ +require 'active_support/dependencies' + +module ActiveSupport + # This module provides an internal implementation to track descendants + # which is faster than iterating through ObjectSpace. + module DescendantsTracker + @@descendants = Hash.new { |h, k| h[k] = [] } + + def self.descendants + @@descendants + end + + def self.clear + @@descendants.each do |klass, descendants| + if ActiveSupport::Dependencies.autoloaded?(klass) + @@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 + @@descendants[self] + end + + def descendants + @@descendants[self].inject([]) do |descendants, klass| + descendants << klass + descendants.concat klass.descendants + end + end + end +end
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