instiki/vendor/rails/activeresource/test/setter_trap.rb

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class SetterTrap < BasicObject
class << self
def rollback_sets(obj)
returning yield(setter_trap = new(obj)) do
setter_trap.rollback_sets
end
end
end
def initialize(obj)
@cache = {}
@obj = obj
end
def respond_to?(method)
@obj.respond_to?(method)
end
def method_missing(method, *args, &proc)
@cache[method] ||= @obj.send($`) if method.to_s =~ /=$/
@obj.send method, *args, &proc
end
def rollback_sets
@cache.each { |k, v| @obj.send k, v }
end
end