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namespace attributes logic

This commit is contained in:
geemus 2010-06-07 18:22:31 -07:00
parent 4858fc6594
commit b9fb24963c
3 changed files with 96 additions and 94 deletions

View file

@ -1,96 +1,98 @@
module Attributes
module ClassMethods
module Fog
module Attributes
module ClassMethods
def _load(marshalled)
new(Marshal.load(marshalled))
end
def aliases
@aliases ||= {}
end
def attributes
@attributes ||= []
end
def attribute(name, other_names = [])
class_eval <<-EOS, __FILE__, __LINE__
attr_accessor :#{name}
EOS
@attributes ||= []
@attributes |= [name]
for other_name in [*other_names]
aliases[other_name] = name
def _load(marshalled)
new(Marshal.load(marshalled))
end
def aliases
@aliases ||= {}
end
def attributes
@attributes ||= []
end
def attribute(name, other_names = [])
class_eval <<-EOS, __FILE__, __LINE__
attr_accessor :#{name}
EOS
@attributes ||= []
@attributes |= [name]
for other_name in [*other_names]
aliases[other_name] = name
end
end
def identity(name, other_names = [])
@identity = name
self.attribute(name, other_names)
end
end
def identity(name, other_names = [])
@identity = name
self.attribute(name, other_names)
end
module InstanceMethods
def _dump
Marshal.dump(attributes)
end
def attributes
attributes = {}
for attribute in self.class.attributes
attributes[attribute] = send("#{attribute}")
end
attributes
end
def identity
send(self.class.instance_variable_get('@identity'))
end
def identity=(new_identity)
send("#{self.class.instance_variable_get('@identity')}=", new_identity)
end
def merge_attributes(new_attributes = {})
for key, value in new_attributes
if aliased_key = self.class.aliases[key]
send("#{aliased_key}=", value)
else
send("#{key}=", value)
end
end
self
end
def new_record?
!identity
end
def requires(*args)
missing = []
for arg in [:connection] | args
missing << arg unless send("#{arg}")
end
unless missing.empty?
if missing.length == 1
raise(ArgumentError, "#{missing.first} is required for this operation")
else
raise(ArgumentError, "#{missing[0...-1].join(", ")} and #{missing[-1]} are required for this operation")
end
end
end
private
def remap_attributes(attributes, mapping)
for key, value in mapping
if attributes.key?(key)
attributes[value] = attributes.delete(key)
end
end
end
end
end
module InstanceMethods
def _dump
Marshal.dump(attributes)
end
def attributes
attributes = {}
for attribute in self.class.attributes
attributes[attribute] = send("#{attribute}")
end
attributes
end
def identity
send(self.class.instance_variable_get('@identity'))
end
def identity=(new_identity)
send("#{self.class.instance_variable_get('@identity')}=", new_identity)
end
def merge_attributes(new_attributes = {})
for key, value in new_attributes
if aliased_key = self.class.aliases[key]
send("#{aliased_key}=", value)
else
send("#{key}=", value)
end
end
self
end
def new_record?
!identity
end
def requires(*args)
missing = []
for arg in [:connection] | args
missing << arg unless send("#{arg}")
end
unless missing.empty?
if missing.length == 1
raise(ArgumentError, "#{missing.first} is required for this operation")
else
raise(ArgumentError, "#{missing[0...-1].join(", ")} and #{missing[-1]} are required for this operation")
end
end
end
private
def remap_attributes(attributes, mapping)
for key, value in mapping
if attributes.key?(key)
attributes[value] = attributes.delete(key)
end
end
end
end
end
end

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@ -1,8 +1,8 @@
module Fog
class Collection < Array
extend Attributes::ClassMethods
include Attributes::InstanceMethods
extend Fog::Attributes::ClassMethods
include Fog::Attributes::InstanceMethods
Array.public_instance_methods(false).each do |method|
class_eval <<-RUBY

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@ -1,8 +1,8 @@
module Fog
class Model
extend Attributes::ClassMethods
include Attributes::InstanceMethods
extend Fog::Attributes::ClassMethods
include Fog::Attributes::InstanceMethods
attr_accessor :connection