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author | Sam Stephenson <sam@37signals.com> | 2005-12-27 03:11:03 +0000 |
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committer | Sam Stephenson <sam@37signals.com> | 2005-12-27 03:11:03 +0000 |
commit | e567a5eb1afe1ac38f1da37f1c1e3922bbf79d2a (patch) | |
tree | 47baca37670f0ad23d803c2f939199147efe4287 /activesupport/lib/active_support/json.rb | |
parent | 0b55ce7191b167d67ec7ccc7eb8db2e5fac4f2e1 (diff) | |
download | rails-e567a5eb1afe1ac38f1da37f1c1e3922bbf79d2a.tar.gz rails-e567a5eb1afe1ac38f1da37f1c1e3922bbf79d2a.tar.bz2 rails-e567a5eb1afe1ac38f1da37f1c1e3922bbf79d2a.zip |
Add ActiveSupport::JSON and Object#to_json for converting Ruby objects to JSON strings
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3356 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
Diffstat (limited to 'activesupport/lib/active_support/json.rb')
-rw-r--r-- | activesupport/lib/active_support/json.rb | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/json.rb b/activesupport/lib/active_support/json.rb new file mode 100644 index 0000000000..77c7225c66 --- /dev/null +++ b/activesupport/lib/active_support/json.rb @@ -0,0 +1,28 @@ +require 'active_support/json/encoders' + +module ActiveSupport + module JSON #:nodoc: + class CircularReferenceError < StandardError; end + + class << self + REFERENCE_STACK_VARIABLE = :json_reference_stack + + def encode(value) + raise_on_circular_reference(value) do + Encoders[value.class].call(value) + end + end + + protected + def raise_on_circular_reference(value) + stack = Thread.current[REFERENCE_STACK_VARIABLE] ||= [] + raise CircularReferenceError, 'object references itself' if + stack.include? value + stack << value + yield + ensure + stack.pop + end + end + end +end |