Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/jrubyfx-fxmlloader.rb

Direct Known Subclasses

RelativeFXMLString

Instance Method Summary collapse

Instance Method Details

#constantize_by(splitter = "::") ⇒ Object

steal handy methods from activesupport Tries to find a constant with the name specified in the argument string.

‘Module’.constantize # => Module ‘Test::Unit’.constantize # => Test::Unit

The name is assumed to be the one of a top-level constant, no matter whether it starts with “::” or not. No lexical context is taken into account:

C = ‘outside’ module M C = ‘inside’ C # => ‘inside’ ‘C’.constantize # => ‘outside’, same as ::C end

NameError is raised when the name is not in CamelCase or the constant is unknown.



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# File 'lib/jrubyfx-fxmlloader.rb', line 765

def constantize_by(splitter="::")
  camel_cased_word = self
  names = camel_cased_word.split(splitter)
  names.shift if names.empty? || 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 it it's owned
      # directly before we reach Object or the end of ancestors.
      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