Method Wrapper

Lightweight method wrapper in Ruby.

Introduction

alias_method_chain alternative. How easy to wrap new features around existing methods with method_wrapper.

Installation

gem install method_wrapper

Examples

• Wrap multi methods to a feature in a line.

• Be able to call wrap_methods before methods defined. require ‘method_wrapper’

• Call original method(origin_method_name). Note: I take different style from alias_method_chain because we don’t want users to know what feature has been wrapped.

Examples

class Klass
  include MethodWrapper
  wrap_methods [:save!, :query] => :log

  def save!
    "save"
  end

  def query
    "update"
  end

  def save_with_log!
    origin_save! + " with log"
  end

  def query_with_log
    origin_query! + " with log"
  end
end

obj = Klass.new
obj.save!
 => "save with log"
obj.origin_save!
 => "save"

You can also open the existing classes to wrap methods. Note: Be careful, you know what you are doing.

require 'method_wrapper'

class String
  include MethodWrapper
  wrap_methods :reverse => :upcase

  def reverse_with_upcase
    origin_reverse.upcase
  end
end

"nuhhc gnanmas".reverse
 => SAMNANG CHHUN