lib/openwfe/expressions/fe_value.rb in openwferu-0.9.8 vs lib/openwfe/expressions/fe_value.rb in openwferu-0.9.9

@@ -42,14 +42,10 @@
 require 'openwfe/workitem'
 require 'openwfe/flowexpressionid'
 require 'openwfe/expressions/flowexpression'
 
 
-#
-# expressions like 'set' and 'unset' and their utility methods
-#
-
 module OpenWFE
 
     #
     # The 'set' expression is used to set the value of a (process) variable or
     # a (workitem) field.
@@ -59,14 +55,21 @@
     #     <set variable="/stage" field-value="f_stage" />
     #     <set field="stamp" value="${r:Time.now.to_i}" />
     #
     # (Notice the usage of the dollar notation in the last exemple).
     #
+    # 'set' expressions may be placed outside of a process-definition body,
+    # they will be evaluated sequentially before the body gets applied 
+    # (executed).
+    #
     class SetValueExpression < FlowExpression
 
+        is_definition
+
         names :set
 
+
         def apply (workitem)
 
             if @children.length < 1
                 workitem.attributes[FIELD_RESULT] = lookup_value(workitem)
                 reply(workitem)
@@ -118,22 +121,10 @@
                     reply(workitem)
                 else
                     get_expression_pool().apply(child, workitem)
                 end
             end
-
-            #def determine_value (workitem)
-            #    if @children.length > 0
-            #        child = @children[0]
-            #        if child.kind_of? FlowExpressionId
-            #            return "nada"
-            #        else
-            #            return child
-            #        end
-            #    end
-            #    return lookup_value(workitem)
-            #end
     end
 
     #
     # 'unset' removes a field or a variable.
     #
@@ -157,12 +148,9 @@
                 raise "attribute 'variable' or 'field' is missing for 'unset' expression"
             end
 
             reply_to_parent(workitem)
         end
-
-        #def reply (workitem)
-        #end
     end
 
 end