lib/alf/operator/unary.rb in alf-0.10.1 vs lib/alf/operator/unary.rb in alf-0.11.0

@@ -3,36 +3,14 @@
     # 
     # Specialization of Operator for operators that work on a unary input
     #
     module Unary
       include Operator 
-      
-      # 
-      # Sets the operator input
-      #
-      def pipe(input, env = environment)
-        self.environment = env
-        self.datasets = [ input ]
-        self
-      end
 
-      protected
-    
-      #
-      # Simply returns the first dataset
-      #
-      def input
-        Iterator.coerce(datasets.first, environment)
+      # Simply returns the first operand
+      def operand
+        operands.first
       end
-      
-      # 
-      # Yields the block with each input tuple.
-      #
-      # This method should be preferred to <code>input.each</code> when possible.
-      #
-      def each_input_tuple
-        input.each(&Proc.new)
-      end
-      
+
     end # module Unary
   end # module Operator
 end # module Alf