diff options
Diffstat (limited to 'activesupport/lib/active_support/dependencies.rb')
-rw-r--r-- | activesupport/lib/active_support/dependencies.rb | 91 |
1 files changed, 55 insertions, 36 deletions
diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb index 8cd4d15e4c..100b48312a 100644 --- a/activesupport/lib/active_support/dependencies.rb +++ b/activesupport/lib/active_support/dependencies.rb @@ -5,6 +5,7 @@ require 'active_support/core_ext/module/aliasing' require 'active_support/core_ext/module/attribute_accessors' require 'active_support/core_ext/module/introspection' require 'active_support/core_ext/module/anonymous' +require 'active_support/core_ext/module/qualified_const' require 'active_support/core_ext/object/blank' require 'active_support/core_ext/load_error' require 'active_support/core_ext/name_error' @@ -70,14 +71,20 @@ module ActiveSupport #:nodoc: # # This is handled by walking back up the watch stack and adding the constants # found by child.rb to the list of original constants in parent.rb - class WatchStack < Hash + class WatchStack + include Enumerable + # @watching is a stack of lists of constants being watched. For instance, # if parent.rb is autoloaded, the stack will look like [[Object]]. If parent.rb # then requires namespace/child.rb, the stack will look like [[Object], [Namespace]]. def initialize @watching = [] - super { |h,k| h[k] = [] } + @stack = Hash.new { |h,k| h[k] = [] } + end + + def each(&block) + @stack.each(&block) end # return a list of new constants found since the last call to watch_namespaces @@ -88,7 +95,7 @@ module ActiveSupport #:nodoc: @watching.last.each do |namespace| # Retrieve the constants that were present under the namespace when watch_namespaces # was originally called - original_constants = self[namespace].last + original_constants = @stack[namespace].last mod = Inflector.constantize(namespace) if Dependencies.qualified_const_defined?(namespace) next unless mod.is_a?(Module) @@ -101,7 +108,7 @@ module ActiveSupport #:nodoc: # element of self[Object] will be an Array of the constants that were present # before parent.rb was required. The second element will be an Array of the # constants that were present before child.rb was required. - self[namespace].each do |namespace_constants| + @stack[namespace].each do |namespace_constants| namespace_constants.concat(new_constants) end @@ -125,13 +132,14 @@ module ActiveSupport #:nodoc: Inflector.constantize(module_name).local_constant_names : [] watching << module_name - self[module_name] << original_constants + @stack[module_name] << original_constants end @watching << watching end + private def pop_modules(modules) - modules.each { |mod| self[mod].pop } + modules.each { |mod| @stack[mod].pop } end end @@ -229,11 +237,15 @@ module ActiveSupport #:nodoc: end def load(file, *) - load_dependency(file) { super } + result = false + load_dependency(file) { result = super } + result end def require(file, *) - load_dependency(file) { super } + result = false + load_dependency(file) { result = super } + result end # Mark the given constant as unloadable. Unloadable constants are removed each @@ -353,12 +365,13 @@ module ActiveSupport #:nodoc: end # Is the provided constant path defined? - def qualified_const_defined?(path) - names = path.sub(/^::/, '').to_s.split('::') - - names.inject(Object) do |mod, name| - return false unless local_const_defined?(mod, name) - mod.const_get name + if Module.method(:const_defined?).arity == 1 + def qualified_const_defined?(path) + Object.qualified_const_defined?(path.sub(/^::/, '')) + end + else + def qualified_const_defined?(path) + Object.qualified_const_defined?(path.sub(/^::/, ''), false) end end @@ -417,11 +430,12 @@ module ActiveSupport #:nodoc: end def load_once_path?(path) - autoload_once_paths.any? { |base| path.starts_with? base } + # to_s works around a ruby1.9 issue where #starts_with?(Pathname) will always return false + autoload_once_paths.any? { |base| path.starts_with? base.to_s } end # Attempt to autoload the provided module name by searching for a directory - # matching the expect path suffix. If found, the module is created and assigned + # matching the expected path suffix. If found, the module is created and assigned # to +into+'s constants with the name +const_name+. Provided that the directory # was loaded from a reloadable base path, it is added to the set of constants # that are to be unloaded. @@ -478,10 +492,6 @@ module ActiveSupport #:nodoc: qualified_name = qualified_name_for from_mod, const_name path_suffix = qualified_name.underscore - trace = caller.reject {|l| l.starts_with? __FILE__ } - name_error = NameError.new("uninitialized constant #{qualified_name}") - name_error.set_backtrace(trace) - file_path = search_for_file(path_suffix) if file_path && ! loaded.include?(File.expand_path(file_path)) # We found a matching file to load @@ -500,11 +510,12 @@ module ActiveSupport #:nodoc: return parent.const_missing(const_name) rescue NameError => e raise unless e.missing_name? qualified_name_for(parent, const_name) - raise name_error end - else - raise name_error end + + raise NameError, + "uninitialized constant #{qualified_name}", + caller.reject {|l| l.starts_with? __FILE__ } end # Remove the constants that have been autoloaded, and those that have been @@ -523,7 +534,7 @@ module ActiveSupport #:nodoc: class ClassCache def initialize - @store = Hash.new { |h, k| h[k] = Inflector.constantize(k) } + @store = Hash.new end def empty? @@ -534,23 +545,24 @@ module ActiveSupport #:nodoc: @store.key?(key) end - def []=(key, value) - return unless key.respond_to?(:name) - - raise(ArgumentError, 'anonymous classes cannot be cached') if key.name.blank? - - @store[key.name] = value + def get(key) + key = key.name if key.respond_to?(:name) + @store[key] ||= Inflector.constantize(key) end + alias :[] :get - def [](key) + def safe_get(key) key = key.name if key.respond_to?(:name) - - @store[key] + @store[key] || begin + klass = Inflector.safe_constantize(key) + @store[key] = klass + end end - alias :get :[] - def store(name) - self[name] = name + def store(klass) + return self unless klass.respond_to?(:name) + raise(ArgumentError, 'anonymous classes cannot be cached') if klass.name.empty? + @store[klass.name] = klass self end @@ -567,10 +579,17 @@ module ActiveSupport #:nodoc: end # Get the reference for class named +name+. + # Raises an exception if referenced class does not exist. def constantize(name) Reference.get(name) end + # Get the reference for class named +name+ if one exists. + # Otherwise returns nil. + def safe_constantize(name) + Reference.safe_get(name) + end + # Determine if the given constant has been automatically loaded. def autoloaded?(desc) # No name => anonymous module. |