# File lib/aws/s3/policy.rb, line 54
        def resource_arn resource
          prefix = 'arn:aws:s3:::'
          case resource
          when Bucket
            "#{prefix}#{resource.name}"
          when S3Object
            "#{prefix}#{resource.bucket.name}/#{resource.key}"
          when ObjectCollection 
            "#{prefix}#{resource.bucket.name}/#{resource.prefix}*"
          when /^arn:/
            resource
          else 
            "arn:aws:s3:::#{resource}"
          end
        end