Class: Class

Inherits:
Object
  • Object
show all
Defined in:
lib/rets4r/core_ext/class/attribute_accessors.rb

Overview

Extends the class object with class and instance accessors for class attributes, just like the native attr* accessors for instance attributes.

class Person
  cattr_accessor :hair_colors
end

Person.hair_colors = [:brown, :black, :blonde, :red]

Instance Method Summary collapse

Instance Method Details

#cattr_accessor(*syms, &blk) ⇒ Object 



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# File 'lib/rets4r/core_ext/class/attribute_accessors.rb', line 54

def cattr_accessor(*syms, &blk)
  cattr_reader(*syms)
  cattr_writer(*syms, &blk)
end

#cattr_reader(*syms) ⇒ Object 



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# File 'lib/rets4r/core_ext/class/attribute_accessors.rb', line 13

def cattr_reader(*syms)
  syms.flatten.each do |sym|
    next if sym.is_a?(Hash)
    class_eval(<<-EOS, __FILE__, __LINE__ + 1)
      unless defined? @@#{sym}  # unless defined? @@hair_colors
        @@#{sym} = nil          #   @@hair_colors = nil
      end                       # end
                                #
      def self.#{sym}           # def self.hair_colors
        @@#{sym}                #   @@hair_colors
      end                       # end
                                #
      def #{sym}                # def hair_colors
        @@#{sym}                #   @@hair_colors
      end                       # end
    EOS
  end
end

#cattr_writer(*syms) ⇒ Object 



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# File 'lib/rets4r/core_ext/class/attribute_accessors.rb', line 32

def cattr_writer(*syms)
  options = syms.extract_options!
  syms.flatten.each do |sym|
    class_eval(<<-EOS, __FILE__, __LINE__ + 1)
      unless defined? @@#{sym}                       # unless defined? @@hair_colors
        @@#{sym} = nil                               #   @@hair_colors = nil
      end                                            # end
                                                     #
      def self.#{sym}=(obj)                          # def self.hair_colors=(obj)
        @@#{sym} = obj                               #   @@hair_colors = obj
      end                                            # end
                                                     #
      #{"                                            #
      def #{sym}=(obj)                               # def hair_colors=(obj)
        @@#{sym} = obj                               #   @@hair_colors = obj
      end                                            # end
      " unless options[:instance_writer] == false }  # # instance writer above is generated unless options[:instance_writer] == false
    EOS
    self.send("#{sym}=", yield) if block_given?
  end
end