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Versions: 42
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Contents
module Edgarj
# build map: value -> label on-the-fly
class EnumCache
include Singleton
def initialize
@enum_map = {}
# for stat
@hit = @out = @out_of_enum = 0
end
# return label of 'rec.attr', where attr is enum value.
def label(rec, attr, enum = nil)
if !enum
enum = rec.class.const_get(attr.to_s.camelize)
raise(NameError, "wrong constant name #{attr}") if !enum
end
if !@enum_map[enum]
@enum_map[enum] = {}
end
value = rec.attributes[attr.to_s]
if label = @enum_map[enum][value]
@hit += 1
label
else
member = enum.constants.detect{|m|
enum.const_get(m) == value
}
@enum_map[enum][value] =
if member
@out += 1
rec.class.human_const_name(enum, member)
else
@out_of_enum += 1
'??'
end
end
end
# return statistic information of hit, out, out_of_enum.
def stat
[@hit, @out, @out_of_enum]
end
end
end
Version data entries
42 entries across 42 versions & 1 rubygems