Module: LoyalCore::Memoist
- Defined in:
- lib/loyal_core/memoist.rb
Defined Under Namespace
Modules: InstanceMethods
Class Method Summary collapse
- .escape_punctuation(string) ⇒ Object
- .extract_reload!(method, args) ⇒ Object
- .memoist_eval(klass, *args, &block) ⇒ Object
- .memoized_ivar_for(method_name, identifier = nil) ⇒ Object
- .memoized_prefix(identifier = nil) ⇒ Object
- .unmemoized_method_for(method_name, identifier = nil) ⇒ Object
- .unmemoized_prefix(identifier = nil) ⇒ Object
Instance Method Summary collapse
Class Method Details
.escape_punctuation(string) ⇒ Object
27 28 29 |
# File 'lib/loyal_core/memoist.rb', line 27 def self.escape_punctuation(string) string.sub(/\?\Z/, '_query').sub(/!\Z/, '_bang') end |
.extract_reload!(method, args) ⇒ Object
39 40 41 42 43 44 |
# File 'lib/loyal_core/memoist.rb', line 39 def self.extract_reload!(method, args) if args.length == method.arity + 1 && (args.last == true || args.last == :reload) reload = args.pop end reload end |
.memoist_eval(klass, *args, &block) ⇒ Object
31 32 33 34 35 36 37 |
# File 'lib/loyal_core/memoist.rb', line 31 def self.memoist_eval(klass, *args, &block) if klass.respond_to?(:class_eval) klass.class_eval(*args, &block) else klass.singleton_class.class_eval(*args, &block) end end |
.memoized_ivar_for(method_name, identifier = nil) ⇒ Object
11 12 13 |
# File 'lib/loyal_core/memoist.rb', line 11 def self.memoized_ivar_for(method_name, identifier=nil) ["@#{memoized_prefix(identifier)}", escape_punctuation(method_name.to_s)].join("_") end |
.memoized_prefix(identifier = nil) ⇒ Object
19 20 21 |
# File 'lib/loyal_core/memoist.rb', line 19 def self.memoized_prefix(identifier=nil) ["_memoized", identifier].compact.join("_") end |
.unmemoized_method_for(method_name, identifier = nil) ⇒ Object
15 16 17 |
# File 'lib/loyal_core/memoist.rb', line 15 def self.unmemoized_method_for(method_name, identifier=nil) [unmemoized_prefix(identifier), method_name].join("_").to_sym end |
.unmemoized_prefix(identifier = nil) ⇒ Object
23 24 25 |
# File 'lib/loyal_core/memoist.rb', line 23 def self.unmemoized_prefix(identifier=nil) ["_unmemoized", identifier].compact.join("_") end |
Instance Method Details
#memoize(*method_names) ⇒ Object
92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 |
# File 'lib/loyal_core/memoist.rb', line 92 def memoize(*method_names) if method_names.last.is_a?(Hash) identifier = method_names.pop[:identifier] end method_names.each do |method_name| unmemoized_method = Memoist.unmemoized_method_for(method_name, identifier) memoized_ivar = Memoist.memoized_ivar_for(method_name, identifier) Memoist.memoist_eval(self) do include InstanceMethods if method_defined?(unmemoized_method) raise "Already memoized #{method_name}" end alias_method unmemoized_method, method_name if instance_method(method_name).arity == 0 # define a method like this; # def mime_type(reload=true) # skip_cache = reload || !memoized?(:abc) # set_cache = skip_cache && !frozen? # # if skip_cache # value = _unmemoized_mime_type # else # value = @_memoized_mime_type[0] # end # # if set_cache # @_memoized_mime_type = [value] # end # # value # end module_eval <<-EOS, __FILE__, __LINE__ + 1 def #{method_name}(reload = false) skip_cache = reload || !defined?(#{memoized_ivar}) || #{memoized_ivar}.empty? set_cache = skip_cache && !frozen? if skip_cache value = #{unmemoized_method} else value = #{memoized_ivar}[0] end if set_cache #{memoized_ivar} = [value] end value end EOS else # define a method like this; # def mime_type(*args) # reload = Memoist.extract_reload!(method(:_unmemoized_mime_type), args) # # skip_cache = reload || !memoized_with_args?(:mime_type, args) # set_cache = skip_cache && !frozen # # if skip_cache # value = _unmemoized_mime_type(*args) # else # value = @_memoized_mime_type[args] # end # # if set_cache # @_memoized_mime_type ||= {} # @_memoized_mime_type[args] = value # end # # value # end module_eval <<-EOS, __FILE__, __LINE__ + 1 def #{method_name}(*args) reload = Memoist.extract_reload!(method(#{unmemoized_method.inspect}), args) skip_cache = reload || !(defined?(#{memoized_ivar}) && #{memoized_ivar} && #{memoized_ivar}.has_key?(args)) set_cache = skip_cache && !frozen? if skip_cache value = #{unmemoized_method}(*args) else value = #{memoized_ivar}[args] end if set_cache #{memoized_ivar} ||= {} #{memoized_ivar}[args] = value end value end EOS end if private_method_defined?(unmemoized_method) private method_name elsif protected_method_defined?(unmemoized_method) protected method_name end end end end |