Sha256: 7eccc7515a51a0f6983038be905af02b908fb1973eff4cd1b43e77a146afe4a2
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Size: 1.47 KB
Versions: 18
Compression:
Stored size: 1.47 KB
Contents
# -*- encoding : utf-8 -*-
module Dao
class Extractor < BlankSlate
attr :target
attr :extracted
attr :strategies
def initialize(target, *args, &block)
@target = target
@strategies = Map.new
@extracted = Map.new
extracts(*args)
end
def inspect
@extracted.inspect
end
def extracts(*args, &block)
hashes = []
args.each do |arg|
if arg.is_a?(Hash)
hashes.push(arg)
else
if block
hashes.push(arg => block)
end
end
end
hashes.each do |hash|
hash.each do |key, val|
next unless val.respond_to?(:call)
@strategies[key] = val
end
end
self
end
def method_missing(method, *args, &block)
super unless @strategies.has_key?(method)
extract(method, &@strategies[method])
end
def extract(attribute, &block)
return @extracted[attribute] if @extracted.has_key?(attribute)
if @target.respond_to?(attribute)
value = @target.send(attribute)
@extracted[attribute] = value
return @extracted[attribute]
end
ivar = "@#{ attribute }"
if @target.instance_variable_defined?(ivar)
value = @target.instance_variable_get(ivar)
@extracted[attribute] = value
return @extracted[attribute]
end
if block
@extracted[attribute] = block.call
return @extracted[attribute]
end
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems