Create a gist now

Instantly share code, notes, and snippets.

What would you like to do?
require 'java'
#require 'clojure-1.0.0.jar'
Dir["#{File.dirname(__FILE__)}/*.jar"].each { |jar| puts "requiring: #{jar}"; require jar }
import "clojure.lang.RT"
class CljHelper
def initialize *pkgs
@mappings = {}
@ns_map = RT.var "clojure.core", "ns-map"
@symbol = RT.var "clojure.core", "symbol"
@require = RT.var "clojure.core", "require"
pkgs.each do |pkg|
_import pkg
end
end
# TODO: can we import all of a package's symbols?
def _import pkg_name, sym=nil, sym_alais=nil
#pkg_name = pkg_name.gsub '-', '_'
puts "calling clojure.core/require #{pkg_name}"
@require.invoke @symbol.invoke(pkg_name)
if sym
sym_alias ||= sym
@mappings[sym_alias] = RT.var pkg_name, sym
return
end
puts "Importing all symbols from #{pkg_name}"
pkg = @symbol.invoke pkg_name
puts " => #{pkg}"
@ns_map.invoke(pkg).each do |sym,var|
#puts "importing: #{sym} => #{var}"
@mappings[sym.to_s] = var
end
end
def _invoke m, *args
fun = @mappings[m.to_s] || @mappings[m.to_s.gsub "_", "-"]
unless fun
raise "Error, no current binding for symbol=#{m}"
end
fun.invoke *args
end
def method_missing symbol, *args
_invoke symbol, *args
end
end
clj = CljHelper.new
puts "clj=#{clj}"
#clj._import 'clojure.core', 'prn'
clj._import 'clojure.core'
clj.prn "Hello Clojure, this is JRuby"
clj._invoke "prn", "Hello Clojure, this is JRuby"
# Further Work:
# Array.to_clj => convert to clojure array type or sequence, preferably immutable
# Map.to_clj => convert to clojure or java Map type, prefereably immutable
str_utils = CljHelper.new 'clojure.contrib.str-utils'
puts "Join: #{str_utils._invoke "str-join", ":", ["a", "b", "c"]}"
puts "Join: #{str_utils.str_join ":", ["a", "b", "c"]}"
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment