Class: JsDuck::Util::NullObject

Inherits:

Object

• Object
• JsDuck::Util::NullObject

Defined in:

lib/jsduck/util/null_object.rb

Overview

A class that does nothing. Responds to all methods by returning self, unless a hash passed to constructor. See: en.wikipedia.org/wiki/Null_Object_pattern

Instance Method Summary

• #initialize(methods = {}) ⇒ NullObject constructor

  Optionally takes a hash of method_name => return_value pairs, making it return those values for those methods, sort of like OpenStruct, but for all other methods self is still returned and any number of arguments is accepted.

• #method_missing(meth, *args, &block) ⇒ Object

Constructor Details

#initialize(methods = {}) ⇒ NullObject

Optionally takes a hash of method_name => return_value pairs, making it return those values for those methods, sort of like OpenStruct, but for all other methods self is still returned and any number of arguments is accepted.

# File 'lib/jsduck/util/null_object.rb', line 13

def initialize(methods={})
  @methods = methods
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(meth, *args, &block) ⇒ Object

# File 'lib/jsduck/util/null_object.rb', line 17

def method_missing(meth, *args, &block)
  @methods.has_key?(meth) ? @methods[meth] : self
end