lib/alf/operator/relational/wrap.rb in alf-0.10.1 vs lib/alf/operator/relational/wrap.rb in alf-0.11.0

@@ -1,22 +1,20 @@
 module Alf
-  module Operator::Relational
-    class Wrap < Alf::Operator()
-      include Operator::Relational, Operator::Transform
-  
-      signature do |s|
-        s.argument :attributes, AttrList, []
-        s.argument :as, AttrName, :wrapped
-      end
-      
-      protected 
-  
-      # (see Operator::Transform#_tuple2tuple)
-      def _tuple2tuple(tuple)
-        wrapped, others = @attributes.split(tuple)
-        others[@as] = wrapped
-        others
-      end
-  
-    end # class Wrap
-  end # module Operator::Relational
+  module Operator
+    module Relational
+      class Wrap
+        include Relational, Unary
+
+        signature do |s|
+          s.argument :attributes, AttrList, []
+          s.argument :as, AttrName, :wrapped
+        end
+
+        # (see Operator#compile)
+        def compile
+          Engine::Wrap.new(operand, attributes, as, false)
+        end
+
+      end # class Wrap
+    end # module Relational
+  end # module Operator
 end # module Alf