class Event::NameResolver
Resolve name to Event name
Public Class Methods
new(default_namespace)
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# File lib/event/name_resolver.rb, line 7 def initialize(default_namespace) @default_namespace = default_namespace end
Public Instance Methods
transform(event_id)
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# File lib/event/name_resolver.rb, line 11 def transform(event_id) case event_id when Class event_id when String constantize(event_id) else constantize("#{@default_namespace}::#{camel_case(event_id)}") end rescue => e raise EventNameResolveError, %Q(Transforming "#{event_id}" into an event class failed: #{e.message}.\n\n#{e.backtrace.join("\n")}) end
Private Instance Methods
camel_case(underscored_name)
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# File lib/event/name_resolver.rb, line 26 def camel_case(underscored_name) if RUBY_VERSION < '1.9.3' underscored_name.to_s.split('_').map { |word| word.upcase.chars.to_a[0] + word.chars.to_a[1..-1].join }.join else underscored_name.to_s.split('_').map { |word| word.upcase[0] + word[1..-1] }.join end end
constantize(camel_cased_word)
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Thanks ActiveSupport (Only needed to support Ruby 1.9.3 and JRuby)
# File lib/event/name_resolver.rb, line 36 def constantize(camel_cased_word) names = camel_cased_word.split('::') # Trigger a built-in NameError exception including the ill-formed constant in the message. Object.const_get(camel_cased_word) if names.empty? # Remove the first blank element in case of '::ClassName' notation. names.shift if names.size > 1 && names.first.empty? names.inject(Object) do |constant, name| if constant == Object constant.const_get(name) else candidate = constant.const_get(name) if RUBY_VERSION < '1.9.3' next candidate if constant.const_defined?(name) else next candidate if constant.const_defined?(name, false) end next candidate unless Object.const_defined?(name) # Go down the ancestors to check if it is owned directly. The check # stops when we reach Object or the end of ancestors tree. # rubocop:disable Style/EachWithObject constant = constant.ancestors.inject do |const, ancestor| break const if ancestor == Object break ancestor if ancestor.const_defined?(name, false) const end # rubocop:enable Style/EachWithObject # owner is in Object, so raise constant.const_get(name, false) end end end