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Contents
module Oj
# A Hash subclass that normalizes the hash keys to allow lookup by the
# key.to_s or key.to_sym. It also supports looking up hash values by methods
# that match the keys.
class EasyHash < Hash
# Initializes the instance to an empty Hash.
def initialize()
end
# Replaces the Object.respond_to?() method.
# @param [Symbol] m method symbol
# @return [Boolean] true for any method that matches an instance
# variable reader, otherwise false.
def respond_to?(m)
return true if super
return true if has_key?(key)
return true if has_key?(key.to_s)
has_key?(key.to_sym)
end
def [](key)
return fetch(key, nil) if has_key?(key)
return fetch(key.to_s, nil) if has_key?(key.to_s)
fetch(key.to_sym, nil)
end
# Handles requests for Hash values. Others cause an Exception to be raised.
# @param [Symbol|String] m method symbol
# @return [Boolean] the value of the specified instance variable.
# @raise [ArgumentError] if an argument is given. Zero arguments expected.
# @raise [NoMethodError] if the instance variable is not defined.
def method_missing(m, *args, &block)
if m.to_s.end_with?('=')
raise ArgumentError.new("wrong number of arguments (#{args.size} for 1 with #{m}) to method #{m}") if args.nil? or 1 != args.length
m = m[0..-2]
return store(m.to_s, args[0]) if has_key?(m.to_s)
return store(m.to_sym, args[0]) if has_key?(m.to_sym)
return store(m, args[0])
else
raise ArgumentError.new("wrong number of arguments (#{args.size} for 0 with #{m}) to method #{m}") unless args.nil? or args.empty?
return fetch(m, nil) if has_key?(m)
return fetch(m.to_s, nil) if has_key?(m.to_s)
return fetch(m.to_sym, nil) if has_key?(m.to_sym)
end
raise NoMethodError.new("undefined method #{m}", m)
end
end # EasyHash
end # Oj
Version data entries
85 entries across 85 versions & 2 rubygems