Module: Treequel::Delegation

Included in:
Branch, BranchCollection, Directory, Model::ObjectClass
Defined in:
lib/treequel/mixins.rb

Overview

A collection of various delegation code-generators that can be used to define delegation through other methods, to instance variables, etc.

Class Method Summary collapse

Class Method Details

.def_ivar_delegators(ivar, *delegated_methods) ⇒ Object

Define the given delegated_methods as delegators to the like-named method of the specified ivar. This is pretty much identical with how ‘Forwardable’ from the stdlib does delegation, but it’s reimplemented here for consistency.

class MyClass
  extend Treequel::Delegation

  # Delegate the #each method to the @collection ivar
  def_ivar_delegators :@collection, :each

end



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# File 'lib/treequel/mixins.rb', line 58

def def_ivar_delegators( ivar, *delegated_methods )
	delegated_methods.each do |name|
		body = make_ivar_delegator( ivar, name )
		define_method( name, &body )
	end
end

.def_method_delegators(delegate_method, *delegated_methods) ⇒ Object

Define the given delegated_methods as delegators to the like-named method of the return value of the delegate_method.

class MyClass
  extend Treequel::Delegation

  # Delegate the #bound?, #err, and #result2error methods to the connection
  # object returned by the #connection method. This allows the connection
  # to still be loaded on demand/overridden/etc.
  def_method_delegators :connection, :bound?, :err, :result2error

  def connection
    @connection ||= self.connect
  end
end



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# File 'lib/treequel/mixins.rb', line 38

def def_method_delegators( delegate_method, *delegated_methods )
	delegated_methods.each do |name|
		body = make_method_delegator( delegate_method, name )
		define_method( name, &body )
	end
end