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Merge pull request #3 from ms-tg/simplify-and-clarify-proxy-class

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Simplify and clarify proxy class
This commit is contained in:
Marc Siegel 2013-07-25 08:09:55 -07:00
commit 2783ff283c
1 changed files with 7 additions and 15 deletions
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22
lib/docile/fallback_context_proxy.rb
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@ -2,16 +2,15 @@ require 'set'
module Docile module Docile
class FallbackContextProxy class FallbackContextProxy
NON_PROXIED_METHODS = Set[:object_id, :__send__, :__id__, :==, :equal?, :"!", :"!=", :instance_exec, NON_PROXIED_METHODS = Set[:__send__, :object_id, :__id__, :==, :equal?,
:instance_variables, :instance_variable_get, :instance_variable_set, :"!", :"!=", :instance_exec, :instance_variables,
:instance_variable_get, :instance_variable_set,
:remove_instance_variable] :remove_instance_variable]
NON_PROXIED_INSTANCE_VARIABLES = Set[:@__receiver__, :@__fallback__] NON_PROXIED_INSTANCE_VARIABLES = Set[:@__receiver__, :@__fallback__]
instance_methods.each do |method| instance_methods.each do |method|
unless NON_PROXIED_METHODS.include?(method.to_sym) undef_method(method) unless NON_PROXIED_METHODS.include?(method.to_sym)
undef_method(method)
end
end end
def initialize(receiver, fallback) def initialize(receiver, fallback)
@ -19,22 +18,15 @@ module Docile
@__fallback__ = fallback @__fallback__ = fallback
end end
# Special case to allow proxy instance variables
def instance_variables def instance_variables
# Ruby 1.8.x returns string names, convert to symbols for compatibility # Ruby 1.8.x returns string names, convert to symbols for compatibility
super.select { |v| !NON_PROXIED_INSTANCE_VARIABLES.include?(v.to_sym) } super.select { |v| !NON_PROXIED_INSTANCE_VARIABLES.include?(v.to_sym) }
end end
def method_missing(method, *args, &block) def method_missing(method, *args, &block)
__proxy_method__(method, *args, &block) @__receiver__.__send__(method.to_sym, *args, &block)
end rescue ::NoMethodError => e
@__fallback__.__send__(method.to_sym, *args, &block)
def __proxy_method__(method, *args, &block)
begin
@__receiver__.__send__(method.to_sym, *args, &block)
rescue ::NoMethodError => e
@__fallback__.__send__(method.to_sym, *args, &block)
end
end end
end end
end end