1. We have moved from vBulletin to XenForo and you are viewing the site in the middle of the move. Though the functional aspect of everything is working fine, we are still working on other changes including the new design on Xenforo.
    Dismiss Notice

a design question in C++

Discussion in 'C++' started by vadi, Oct 12, 2009.

  1. vadi

    vadi New Member

    Joined:
    Oct 12, 2009
    Messages:
    2
    Likes Received:
    0
    Trophy Points:
    0
    Hi,

    I get a request in the format of string. I have to parse this string, get to know what type of request it is and populate different fields in objects of corresponding request class. There are around 6 request classes. These request classses have some fields in common but not all. I want to do parsing the string and getting required fields at only one place and I do not want to repeat this in every request class. how can I achive this? By using which design pattern?
     
  2. vadi

    vadi New Member

    Joined:
    Oct 12, 2009
    Messages:
    2
    Likes Received:
    0
    Trophy Points:
    0
    To further clarify things, I have a class known as RMG2BUF. The request string is parsed and it builds a tree structure, each node being of type RMG2NODE. RMG2BUF class provides a way of traversing this tree and getting the value of any required fields. Now these fields have to be mapped to particular field in objects of 6 different request classes that I told earlier. The different request classes like CreateTTRequest,ModifyTTRequest,CancelTTRequest etc share many common fields. I want to do the fetching of values from RMG2BUF at only one place and I do not want to repeat it in setting common fields of different requests. I want to create something like a utility class which provides functions to set all the fields comprising all the requests but it should set it in the the request class object that I have passed
     
  3. shabbir

    shabbir Administrator Staff Member

    Joined:
    Jul 12, 2004
    Messages:
    15,276
    Likes Received:
    364
    Trophy Points:
    83
    Your problem is not very detailed and so having just a base class parser could help you.
     
  4. xpi0t0s

    xpi0t0s Mentor

    Joined:
    Aug 6, 2004
    Messages:
    3,012
    Likes Received:
    203
    Trophy Points:
    0
    Occupation:
    Senior Support Engineer
    Location:
    England
    Can you give a couple of examples of the kinds of strings you want parsed?
    Also you mention "design pattern". What is that, exactly?
     

Share This Page