Generating Methods from Messagekeys

MessageMethods.xtend

Iterators.forEnumeration(resourceBundle.keys).forEach [ key |
  cls.addMethod(key.keyToMethodName) [
    patternVariables.forEach [ patternVariable, index |
      addParameter("arg" + index, patternVariable.argumentType(context))
    ]
    returnType = string
    body = '''
      «String» pattern = bundle.getString("«key»");
      «MessageFormat» format = new «MessageFormat»(pattern);
      return format.format(new «Object»[]{«parameters.join(", ")[simpleName]»});
    '''
  ]
]