My understanding regarding custom tags

Posted on 2011-10-24
Last Modified: 2012-05-12
Hi Friends,
The doAfterBody method(in TagSupport class) is called after the body content is evaluated it means for the first time body content is evaluated by doStartTag method after that it is evaluated by doAfterBody method,right?and what is the difference between doAfterBody method in TagSupport class and BodyTagSupport class?
Question by:PrakashVarma
    LVL 20

    Expert Comment

    by:chaitu chaitu
    The doAfterBody() method is invoked after the first evaluation of the body content (if it is not empty). By returning SKIP_BODY, the doAfterBody() method can tell the JSP container that the processing of the body content is finished:

    public int doAfterBody() throws JspException {
    // do something, or nothing
    return SKIP_BODY;
    }Sometimes the tag handler class must continually process the body content of a custom tag in a loop. You can tell the JSP container to repeatedly evaluate the body content and doAfterBody() invocation by returning EVAL_BODY_TAG from doAfterBody(). Note that because processing can change the body content or its context, each body content evaluation can have differing results.

    public int doAfterBody() throws JspException {
    //do something, or nothing
    return EVAL_BODY_TAG;

    check these links that may help you.
    LVL 20

    Accepted Solution

    BodyTagSupport allows manipulating the content of evaluating tag body. If you use TagSupport, evaluated body is placed to the page, and the user can do nothing with this. When using BodyTagSupport, the user can pick evaluated body from the buffer (BodyContent object) and transform it according his needs.
    LVL 20

    Expert Comment

    by:chaitu chaitu

    Featured Post

    Highfive + Dolby Voice = No More Audio Complaints!

    Poor audio quality is one of the top reasons people don’t use video conferencing. Get the crispest, clearest audio powered by Dolby Voice in every meeting. Highfive and Dolby Voice deliver the best video conferencing and audio experience for every meeting and every room.

    Join & Write a Comment

    Suggested Solutions

    Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption.  Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
    Digital marketing agencies have encountered both the opportunities and difficulties that emerge from working with a wide-ranging organizations.
    Migrating to Microsoft Office 365 is becoming increasingly popular for organizations both large and small. If you have made the leap to Microsoft’s cloud platform, you know that you will need to create a corporate email signature for your Office 365…
    Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

    728 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    20 Experts available now in Live!

    Get 1:1 Help Now