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author | David Heinemeier Hansson <david@loudthinking.com> | 2004-11-24 01:04:44 +0000 |
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committer | David Heinemeier Hansson <david@loudthinking.com> | 2004-11-24 01:04:44 +0000 |
commit | db045dbbf60b53dbe013ef25554fd013baf88134 (patch) | |
tree | 257830e3c76458c8ff3d1329de83f32b23926028 /actionpack/lib/action_controller/support/class_attribute_accessors.rb | |
download | rails-db045dbbf60b53dbe013ef25554fd013baf88134.tar.gz rails-db045dbbf60b53dbe013ef25554fd013baf88134.tar.bz2 rails-db045dbbf60b53dbe013ef25554fd013baf88134.zip |
Initial
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
Diffstat (limited to 'actionpack/lib/action_controller/support/class_attribute_accessors.rb')
-rw-r--r-- | actionpack/lib/action_controller/support/class_attribute_accessors.rb | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/support/class_attribute_accessors.rb b/actionpack/lib/action_controller/support/class_attribute_accessors.rb new file mode 100644 index 0000000000..786dcf98cb --- /dev/null +++ b/actionpack/lib/action_controller/support/class_attribute_accessors.rb @@ -0,0 +1,57 @@ +# Extends the class object with class and instance accessors for class attributes, +# just like the native attr* accessors for instance attributes. +class Class # :nodoc: + def cattr_reader(*syms) + syms.each do |sym| + class_eval <<-EOS + if ! defined? @@#{sym.id2name} + @@#{sym.id2name} = nil + end + + def self.#{sym.id2name} + @@#{sym} + end + + def #{sym.id2name} + @@#{sym} + end + + def call_#{sym.id2name} + case @@#{sym.id2name} + when Symbol then send(@@#{sym}) + when Proc then @@#{sym}.call(self) + when String then @@#{sym} + else nil + end + end + EOS + end + end + + def cattr_writer(*syms) + syms.each do |sym| + class_eval <<-EOS + if ! defined? @@#{sym.id2name} + @@#{sym.id2name} = nil + end + + def self.#{sym.id2name}=(obj) + @@#{sym.id2name} = obj + end + + def self.set_#{sym.id2name}(obj) + @@#{sym.id2name} = obj + end + + def #{sym.id2name}=(obj) + @@#{sym} = obj + end + EOS + end + end + + def cattr_accessor(*syms) + cattr_reader(*syms) + cattr_writer(*syms) + end +end
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