# File lib/AWS/EC2/image_attributes.rb, line 77
77:       def describe_image_attribute( options = {} )
78: 
79:         # defaults
80:         options = {:image_id => "",
81:                    :attribute => "launchPermission"
82:                    }.merge(options)
83: 
84:         raise ArgumentError, "No ':image_id' provided" if options[:image_id].nil? || options[:image_id].empty?
85:         raise ArgumentError, "No ':attribute' provided" if options[:attribute].nil? || options[:attribute].empty?
86: 
87:         params = { "ImageId" => options[:image_id], "Attribute" => options[:attribute] }
88: 
89:         # test options provided and make sure they are valid
90:         case options[:attribute]
91:         when "launchPermission", "productCodes"
92:           # these args are ok
93:         else
94:           raise ArgumentError, "attribute : #{options[:attribute].to_s} is not an known attribute."
95:         end
96: 
97:         return response_generator(:action => "DescribeImageAttribute", :params => params)
98: 
99:       end