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Contents
require 'ostruct'
module ErpRules
module RulesEngine
##
#OpenStruct is part of ruby stdlib
#This class adds methods to allow hash-like
#behavior
class Context < OpenStruct
def initialize(hash=nil)
if hash
hash.each do |k,v|
if v.class == Hash
result = ErpRules::RulesEngine::Context.new(v)
hash[k] = result
elsif v.class == Array
v.map! do |item|
#ostruct requires objects passed to it on the constructr
#to support #each
if item.is_a? Enumerable
ErpRules::RulesEngine::Context.new(item)
else
item
end
end
#end Array case
end
end
end
super(hash)
end
def [](key)
send(key)
end
##
#This will set a method on the struct
#using array syntax.
#Trying to set the argument in eval led to an error,
#hence the 'send' call following it.
def []=(key, *args)
arg = args[0]
eval("#{key} = nil", binding)
if arg.class == Hash
send("#{key}=", ErpRules::RulesEngine::Context.new(arg))
else
send("#{key}=", arg)
end
end
#need this method in order to mimic []= behavior
#using the method/attr syntax of OpenStruct
def method_missing(mid, *args)
if args[0].class == Hash
args[0] = ErpRules::RulesEngine::Context.new(args[0])
end
super(mid, *args)
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems