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