module Reraises

Rescue exceptions and raise them as others.

Usage example:

class Adapter
  extend Reraises

  reraise UglyException, as: PrettyException, in: "bar"

  def query
    raise UglyException, "This exception will be reraised as a PrettyException"
  end
end

Constants

VERSION

Public Instance Methods

reraise(old_exception, options) click to toggle source

Rescue a given exception and raise another.

old_exception - The Exception to rescue. options - A Hash of options:

:as - The Exception class to raise.
:in - A String or Array of Strings describing affected methods.

Calls superclass method

# File lib/reraises.rb, line 24
def reraise old_exception, options
  new_exception = options.fetch :as
  methods       = options.fetch :in

  methods = [methods] unless methods.respond_to? :each

  proxy = Module.new do
    methods.each do |method|
      define_method method do |*args|
        begin
          super *args
        rescue old_exception => exception
          raise new_exception, exception
        end
      end
    end
  end

  class_eval do
    prepend proxy
  end
end