module ActiveFedora::AttributeMethods::ClassMethods

def class_method_defined_within?(name, klass, superklass = klass.superclass) # :nodoc:

:nodoc: 
def class_method_defined_within?(name, klass, superklass = klass.superclass) # :nodoc:
  if klass.respond_to?(name, true)
    if superklass.respond_to?(name, true)
      klass.method(name).owner != superklass.method(name).owner
    else
      true
    end
  else
    false
  end
end

def dangerous_attribute_method?(name) # :nodoc:

:nodoc:
not by any ancestors. (So 'puts' is not dangerous but 'save' is.)
A method name is 'dangerous' if it is already (re)defined by Active Fedora, but 
def dangerous_attribute_method?(name) # :nodoc:
  method_defined_within?(name, Base)
end

def dangerous_class_method?(method_name)

not by any ancestors. (So 'puts' is not dangerous but 'new' is.)
A class method is 'dangerous' if it is already (re)defined by Active Record, but 
def dangerous_class_method?(method_name)
  RESTRICTED_CLASS_METHODS.include?(method_name.to_s) || class_method_defined_within?(method_name, Base)
end

def generate_method(name)

Parameters:
  • name (Symbol) -- name of the attribute to generate 
def generate_method(name)
  generated_attribute_methods.synchronize do
    define_attribute_methods name
  end
end

def inherited(child_class) # :nodoc:

:nodoc: 
def inherited(child_class) # :nodoc:
  child_class.initialize_generated_modules
  super
end

def initialize_generated_modules # :nodoc:

:nodoc: 
def initialize_generated_modules # :nodoc:
  @generated_attribute_methods = GeneratedAttributeMethods.new { extend Mutex_m }
  @attribute_methods_generated = false
  include @generated_attribute_methods
  super
end

def instance_method_already_implemented?(method_name)

# => false
Person.instance_method_already_implemented?(:name)

# => ActiveFedora::DangerousAttributeError: save is defined by Active Record. Check to make sure that you don't have an attribute or method with the same name.
Person.instance_method_already_implemented?(:save)

end
end
'already defined by Active Fedora'
def save
class Person < ActiveRecord::Base

\Active \Record method is defined in the model, otherwise +false+.
Raises an ActiveFedora::DangerousAttributeError exception when an 
def instance_method_already_implemented?(method_name)
  raise DangerousAttributeError, "#{method_name} is defined by Active Fedora. Check to make sure that you don't have an attribute or method with the same name." if dangerous_attribute_method?(method_name)
  if superclass == Base
    super
  else
    # If ThisClass < ... < SomeSuperClass < ... < Base and SomeSuperClass
    # defines its own attribute method, then we don't want to overwrite that.
    defined = method_defined_within?(method_name, superclass, Base) &&
              !superclass.instance_method(method_name).owner.is_a?(GeneratedAttributeMethods)
    defined || super
  end
end

def method_defined_within?(name, klass, superklass = klass.superclass) # :nodoc:

:nodoc: 
def method_defined_within?(name, klass, superklass = klass.superclass) # :nodoc:
  if klass.method_defined?(name) || klass.private_method_defined?(name)
    if superklass.method_defined?(name) || superklass.private_method_defined?(name)
      klass.instance_method(name).owner != superklass.instance_method(name).owner
    else
      true
    end
  else
    false
  end
end