38 lines
1 KiB
Ruby
38 lines
1 KiB
Ruby
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require 'active_support/json/variable'
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require 'active_support/json/encoders/object' # Require explicitly for rdoc.
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Dir["#{File.dirname(__FILE__)}/encoders/**/*.rb"].each do |file|
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basename = File.basename(file, '.rb')
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unless basename == 'object'
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require "active_support/json/encoders/#{basename}"
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end
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end
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module ActiveSupport
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module JSON
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class CircularReferenceError < StandardError
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end
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class << self
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REFERENCE_STACK_VARIABLE = :json_reference_stack #:nodoc:
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# Converts a Ruby object into a JSON string.
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def encode(value, options = {})
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raise_on_circular_reference(value) do
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value.send(:to_json, options)
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end
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end
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protected
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def raise_on_circular_reference(value) #:nodoc:
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stack = Thread.current[REFERENCE_STACK_VARIABLE] ||= []
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raise CircularReferenceError, 'object references itself' if
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stack.include? value
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stack << value
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yield
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ensure
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stack.pop
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end
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end
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end
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end
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