class Sheng::DataSet
Attributes
raw_hash[RW]
Public Class Methods
new(hsh)
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# File lib/sheng/data_set.rb, line 7 def initialize(hsh) raise ArgumentError.new("must be initialized with a Hash") unless hsh.is_a?(Hash) @raw_hash = hsh.deep_symbolize_keys end
Public Instance Methods
fetch(key, **options)
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# File lib/sheng/data_set.rb, line 20 def fetch(key, **options) raise ArgumentError.new("must provide a string") unless key.is_a?(String) key_parts = key.split(/\./) current_result = raw_hash key_parts.each_with_index do |key_part, i| begin value = current_result.fetch(key_part.to_sym) rescue KeyError if options.has_key?(:default) value = options[:default] else raise KeyNotFound, "#{key} (at #{key_part})" end end if (i + 1) < key_parts.length raise_key_too_long(key, key_part) if !(value.is_a?(Hash)) end current_result = value end raise_key_too_short(key) if current_result.is_a?(Hash) current_result end
raise_key_too_long(key, key_part)
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# File lib/sheng/data_set.rb, line 12 def raise_key_too_long(key, key_part) raise KeyNotFound, "in #{key}, #{key_part} did not return a Hash" end
raise_key_too_short(key)
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# File lib/sheng/data_set.rb, line 16 def raise_key_too_short(key) raise KeyNotFound, "result at #{key} is a Hash" end