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