Module: InstanceOptions

Defined in:
lib/instanceoptions.rb

Overview

Instance utils, creates accessor and merge options arguments Examples: class Foo

include InstanceOptions

end f=Foo.new f.attr_accessor(:test) f.test=123 p f.test #=> ‘123’ f.bar=456 #=> raise error ‘undefined method’ Merge options class Bar

DEFAULT_OPTIONS={:name => 'my name', :city => 'my city', :address => 'my address'}
include InstanceOptions
def initialize(options={})
  @options=options   #The name @options is mandatory
  instance_options(DEFAULT_OPTIONS)  #call method instance_options with hash
 end

end b=Bar.new b.inspect #=> #Bar:0xb79e9730 @city=“my city”, @address=“my address”, @options={}, @name=“my name” b.city #=> ‘my city’ b.city=‘other’ b.city #=> ‘other’

b=Bar.new :name => ‘Shairon’, :city => ‘Gyn’ b.inspect #=> #Bar:0xb79e4ba4 @city=“Gyn”, @address=“my address”, @name=“Shairon”, @options=:city=>“Gyn” b.city #=> ‘Gyn’

b=Bar.new :name => ‘Tom’, :address => ‘can not say!’, :country => ‘Japan’ # NoMethodError: undefined method ‘country=’ for Bar:0xb79de7f4

b=Bar.new b.attr_accessor(:country) b.country=‘Brazil’ b.country #=> ‘Brazil’ b.inspect #=> #Bar:0xb79dbe28 @city=“my city”, @country=“Brazil”, @address=“my address”, @options={}, @name=“my name”

Instance Method Summary collapse

Instance Method Details

#attr_accessor(*args) ⇒ Object

Equivalent to attr_reader and attr_writer



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# File 'lib/instanceoptions.rb', line 54

def attr_accessor(*args)
  attr_reader(args)
  attr_writer(args)
end

#attr_reader(*args) ⇒ Object

Creates method and instance variable for read.



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# File 'lib/instanceoptions.rb', line 39

def attr_reader(*args)
  sym_args=args_to_sym(args)
  sym_args.each do |value|
    self.instance_eval("def #{value}; @#{value};end;")
  end
end

#attr_writer(*args) ⇒ Object

Creates method and instance variable for write.



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# File 'lib/instanceoptions.rb', line 46

def attr_writer(*args)
  sym_args=args_to_sym(args)
  sym_args.each do |value|
    self.instance_eval("def #{value}=(arg); @#{value}=arg;end;")
  end
  
end

#initialize_default_options(options) ⇒ Object

:nodoc:



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# File 'lib/instanceoptions.rb', line 65

def initialize_default_options(options) # :nodoc: 
  
  options.each do |k,v|
    attr_accessor(k)
    self.send(k.to_s+'=',v)      
  end
end

#instance_options(default_options) ⇒ Object

Creates through of the hash methods accessors for each entries and set values



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# File 'lib/instanceoptions.rb', line 74

def instance_options(default_options)
  initialize_default_options(default_options)
  set_instance_options(@options)
end

#set_instance_options(options) ⇒ Object

:nodoc:



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# File 'lib/instanceoptions.rb', line 59

def set_instance_options(options) # :nodoc: 
  options.each do |k,v|
    self.send(k.to_s+"=",v)      
  end
end