October 6th, 2006

JRuby import


OK, for those of you who thought that importing a class into the current namespace by assigning a constant, here is a small implementation (based on include_class), that lets you use import like you do it in Java:

 require 'java'

class Object
  def import(name)
    unless String === name
      name = name.java_class.inspect
    end
    class_name = name.match(/((.*)\.)?([^\.]*)/)[3]
    clazz = self.kind_of?(Module) ? self : self.class
    unless clazz.const_defined?(class_name)
      if (respond_to?(:class_eval, true))
        class_eval("#{class_name} = #{name}")
      else
        eval("#{class_name} = #{name}")
      end
    end
  end
end

import java.util.TreeMap

x = TreeMap.new
x['foo'] = 'bar'
puts x

5 Comments | By Ola Bini | In: Uncategorized | tags: , , . | #