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require 'psych/omap'
require 'psych/set'
module Psych
class ClassLoader # :nodoc:
BIG_DECIMAL = 'BigDecimal'
COMPLEX = 'Complex'
DATE = 'Date'
DATE_TIME = 'DateTime'
EXCEPTION = 'Exception'
OBJECT = 'Object'
PSYCH_OMAP = 'Psych::Omap'
PSYCH_SET = 'Psych::Set'
RANGE = 'Range'
RATIONAL = 'Rational'
REGEXP = 'Regexp'
STRUCT = 'Struct'
SYMBOL = 'Symbol'
def initialize
@cache = CACHE.dup
end
def load klassname
return nil if !klassname || klassname.empty?
find klassname
end
def symbolize sym
symbol
sym.to_sym
end
constants.each do |const|
konst = const_get const
define_method(const.to_s.downcase) do
load konst
end
end
private
def find klassname
@cache[klassname] ||= resolve(klassname)
end
def resolve klassname
name = klassname
retried = false
begin
path2class(name)
rescue ArgumentError, NameError => ex
unless retried
name = "Struct::#{name}"
retried = ex
retry
end
raise retried
end
end
CACHE = Hash[constants.map { |const|
val = const_get const
begin
[val, ::Object.const_get(val)]
rescue
nil
end
}.compact]
class Restricted < ClassLoader
def initialize classes, symbols
@classes = classes
@symbols = symbols
super()
end
def symbolize sym
return super if @symbols.empty?
if @symbols.include? sym
super
else
raise DisallowedClass, 'Symbol'
end
end
private
def find klassname
if @classes.include? klassname
super
else
raise DisallowedClass, klassname
end
end
end
end
end