Module: Aruba::EventBus::NameResolver::ResolveHelpers

Included in:
StringResolver, SymbolResolver
Defined in:
lib/aruba/event_bus/name_resolver.rb

Overview

Helpers for Resolvers

Instance Method Summary collapse

Instance Method Details

#camel_case(underscored_name) ⇒ Object

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# File 'lib/aruba/event_bus/name_resolver.rb', line 12

def camel_case(underscored_name)
  underscored_name.to_s.split("_").map { |word| word.upcase[0] + word[1..] }.join
end

#constantize(camel_cased_word) ⇒ Object

Thanks ActiveSupport (Only needed to support Ruby 1.9.3 and JRuby)

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# File 'lib/aruba/event_bus/name_resolver.rb', line 18

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)

      next candidate if constant.const_defined?(name, false)

      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.
      constant = constant.ancestors.inject do |const, ancestor|
        break const    if ancestor == Object
        break ancestor if ancestor.const_defined?(name, false)

        const
      end

      # owner is in Object, so raise
      constant.const_get(name, false)
    end
  end
end