Extracted the policy driven classes into their own library for now "wsf_policy_driven.ecf"

Updated the restbucksCRUD example to demonstrate both approaches.

library/server/wsf/policy_driven/wsf_delete_helper.e

@@ -0,0 +1,66 @@
+note
+
+	description: "[
+						Policy-driven helpers to implement the DELETE method.
+					  ]"
+	date: "$Date$"
+	revision: "$Revision$"
+
+class WSF_DELETE_HELPER
+
+inherit
+
+	WSF_METHOD_HELPER
+
+feature {NONE} -- Implementation
+	
+	send_response (req: WSF_REQUEST; res: WSF_RESPONSE; a_handler: WSF_SKELETON_HANDLER; a_header: HTTP_HEADER; a_new_resource: BOOLEAN)
+			-- Write response to deletion of resource named by `req' into `res'.
+			-- Upto four execution variables may be set on `req':
+			-- "NEGOTIATED_MEDIA_TYPE"
+			-- "NEGOTIATED_LANGUAGE"
+			-- "NEGOTIATED_CHARSET"
+			-- "NEGOTIATED_ENCODING"
+		local
+			l_dt: STRING
+			l_ok: BOOLEAN
+		do
+			a_handler.delete (req)
+			l_ok := a_handler.response_ok (req)
+			if l_ok then
+				if a_handler.includes_response_entity (req) then
+					a_handler.ensure_content_available (req)
+					l_ok := a_handler.response_ok (req)
+					if l_ok then
+						a_header.put_content_length (a_handler.content_length (req).as_integer_32)
+					end
+					-- we don't bother supporting chunked responses for DELETE.
+				else
+					a_header.put_content_length (0)
+				end
+				if attached req.request_time as l_time then
+					l_dt := (create {HTTP_DATE}.make_from_date_time (l_time)).rfc1123_string
+					a_header.put_header_key_value ({HTTP_HEADER_NAMES}.header_date, l_dt)
+					generate_cache_headers (req, a_handler, a_header, l_time)
+				end
+				if a_handler.delete_queued (req) then
+					res.set_status_code ({HTTP_STATUS_CODE}.accepted)
+					res.put_header_text (a_header.string)
+					res.put_string (a_handler.content (req))
+				elseif a_handler.deleted (req) then
+					if a_handler.includes_response_entity (req) then
+						res.set_status_code ({HTTP_STATUS_CODE}.ok)
+						res.put_header_text (a_header.string)
+						res.put_string (a_handler.content (req))
+					else
+						res.set_status_code ({HTTP_STATUS_CODE}.no_content)
+						res.put_header_text (a_header.string)
+					end
+				end
+			end
+			if not l_ok then
+				write_error_response (req, res)
+			end
+		end
+
+end