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attributes.rb
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attributes.rb
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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, options = {})
class_eval <<-EOS, __FILE__, __LINE__
def #{name}
attributes[:#{name}]
end
EOS
case options[:type]
when :boolean
class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_#{name})
attributes[:#{name}] = case new_#{name}
when true,'true'
true
when false,'false'
false
end
end
EOS
when :float
class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_#{name})
attributes[:#{name}] = new_#{name}.to_f
end
EOS
when :integer
class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_#{name})
attributes[:#{name}] = new_#{name}.to_i
end
EOS
when :string
class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_#{name})
attributes[:#{name}] = new_#{name}.to_s
end
EOS
when :time
class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_#{name})
attributes[:#{name}] = if new_#{name}.nil? || new_#{name} == "" || new_#{name}.is_a?(Time)
new_#{name}
else
Time.parse(new_#{name})
end
end
EOS
when :array
class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_#{name})
attributes[:#{name}] = [*new_#{name}]
end
EOS
when :readonly
#do not create a setter
else
if squash = options[:squash]
class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_data)
if new_data.is_a?(Hash)
if new_data.has_key?(:'#{squash}')
attributes[:#{name}] = new_data[:'#{squash}']
elsif new_data.has_key?("#{squash}")
attributes[:#{name}] = new_data["#{squash}"]
else
attributes[:#{name}] = [ new_data ]
end
else
attributes[:#{name}] = new_data
end
end
EOS
else
class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_#{name})
attributes[:#{name}] = new_#{name}
end
EOS
end
end
@attributes ||= []
@attributes |= [name]
for new_alias in [*options[:aliases]]
aliases[new_alias] = name
end
end
def identity(name, options = {})
@identity = name
self.attribute(name, options)
end
def ignore_attributes(*args)
@ignored_attributes = args.collect {|attr| attr.to_s }
end
def ignored_attributes
@ignored_attributes ||= []
end
end
module InstanceMethods
def _dump(level)
Marshal.dump(attributes)
end
def attributes
@attributes ||= {}
end
def dup
copy = super
copy.dup_attributes!
copy
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
unless self.class.ignored_attributes.include?(key)
if aliased_key = self.class.aliases[key]
send("#{aliased_key}=", value)
elsif self.respond_to?("#{key}=",true)
send("#{key}=", value)
else
attributes[key] = value
end
end
end
self
end
# Returns true if a remote resource has been assigned an
# identity and we can assume it has been persisted.
#
# @return [Boolean]
def persisted?
!!identity
end
# Returns true if a remote resource has not been assigned an
# identity.
#
# This was added for a ActiveRecord like feel but has been
# outdated by ActiveModel API using {#persisted?}
#
# @deprecated Use inverted form of {#persisted?}
# @return [Boolean]
def new_record?
Fog::Logger.deprecation("#new_record? is deprecated, use !persisted? instead [light_black](#{caller.first})[/]")
!persisted?
end
# check that the attributes specified in args exist and is not nil
def requires(*args)
missing = missing_attributes(args)
if missing.length == 1
raise(ArgumentError, "#{missing.first} is required for this operation")
elsif missing.any?
raise(ArgumentError, "#{missing[0...-1].join(", ")} and #{missing[-1]} are required for this operation")
end
end
def requires_one(*args)
missing = missing_attributes(args)
if missing.length == args.length
raise(ArgumentError, "#{missing[0...-1].join(", ")} or #{missing[-1]} are required for this operation")
end
end
protected
def missing_attributes(args)
missing = []
for arg in [:service] | args
unless send("#{arg}") || attributes.has_key?(arg)
missing << arg
end
end
missing
end
def dup_attributes!
@attributes = @attributes.dup if @attributes
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