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Submitted by Kurt on October 22, 2006 - 7:04pm.

UMLETA specializes in software tools and development for LAMP environments. We support UML and meta-model translation tools. We also develop general software; everything from websites to custom system software.

Not working in Java? Our open-source tools can translate UML and other meta-models into Perl and Ruby.

Working in multiple languages? Translate a single model or meta-model into multiple target languages.

Need a special model or meta-model transformation? Let us craft a custom solution for you!

UMMF is the Universal Meta-Model Framework. It is an open-source implementation of the UML 1.5 meta-model and MOF 1.4 meta-models written in Perl. It can transform meta-models, and models from popular UML editors, such as Poseidon, into executable Perl, Java and Ruby code.

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Multimethod: Ruby Package for Multimethod Dispatching

Submitted by Kurt on November 21, 2006 - 4:15pm.

metaprogramming | multimethod | object | ruby

See: http://rubyforge.org/projects/multimethod/

The RubyForge package multimethod
implements multimethod dispatch of methods based on argument types.

require 'multimethod'

class A
  multimethod %q{
  def foo(x) # matches any argument type
     "#{x.inspect}"
  end
  }

  multimethod %q{
  def foo(Fixnum x) # matches any Fixnum
     "Fixnum #{x.inspect}"
  end
  }

  multimethod %q{
  def foo(Numeric x) # matches any Numeric
     "Numeric #{x.inspect}"
  end
  }
end

a = A.new
puts a.foo(:symbol) # ==> ":symbol"
puts a.foo(45)      # ==> "Fixnum 45"
puts a.foo(12.34)   # ==> "Numeric 12.34"

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