See follow-ups intermixed.
| From: Volker Turau <[EMAIL PROTECTED]>
| ...
| Somehow user defined tags are not discussed on this list.
I think it is just lack of an implementation.
| 1. What is the return value of the methods doStartTag(), doEndTag()
| respectively doAfterBody() in the support classes TagSupport and
| BodyTagSupport?
|
| The values you mention in your mail are not documented. The orion
| application server behaves as follows:
| TagSupport:
| doStartTag() returns EVAL_BODY_INCLUDE (and not SKIP_PAGE)
| doEndTag() returns EVAL_PAGE
Note that I had mentioned SKIP_BODY, not SKIP_PAGE.
Thanks. I'll contact the Orion people. It is a bug in the PR2 spec, in
that it does not spell this out. Will be fixed before FCS.
| 2. How do the implementations of doEndTag() differ in the classes
| TagSupport and BodyTagSupport?
|
| It seems odd that BodyTagSupport overrides doEndTag but does not
| override doStartTag. Since these classes will be subclassed by
| users, overriding doEndTag() by super.doEndTag() is even more odd.
I think you misunderstood my answer. BodyTagSupports overrides both.
doStartTag() changes value, while doEndTag() just uses its super, so
it has the same value.
| 3. Is it possible to use the method getPreviousOut() of class
| BodyTagSupport in the implementation of the methods doStartTag() or
| doEndTag() in subclasses of BodyTagSupport? Or can these methods
| only use pageContext.getOut()?
|
| Using getPreviousOut() seems logical. Appartently the orion server
| reports an error when doing so.
|
| 4. Why does the method doInitBody() in class BodyTagSupport not
| include the clause throws JspError?
|
| Bug in PR2, ok
|
| 5. What happend to the method public PageContext getPageContext() in
| class Tag? Why was it deleted?
|
| Providing pageContext as a protected field doesn't seem to be
| consistent with the other J2EE APIs. There only very few protected
| fields in these classes. Why did you choose pageContext as one of
| them? Why is it safer?
Maybe a class going and playing with the page context of another
class?
Let me turn it around. Do you have a specific example for wanting
this information?
| 6. What happened to the method public java.lang.String getTagName() in
| class Tag? Why was it deleted?
|
| I used it only for error reporting (as you mentioned). I found it
| usefull, because introducing the tag name in the tag handler class
| makes it harder to change tag names (it is redundant). Also if you
| subclass tag handlers error reporting using getTagName() was easy.
We will keep this in mind when designing JSP.next.
| Thanks for answering my questions! :-)
|
| volker turau
| FH Wiesbaden Fachbereich Informatik
| Tel.: +49-611-9495-205 FAX +49-611-9495-210
| http://www.informatik.fh-wiesbaden.de/~turau
===========================================================================
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
FAQs on JSP can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
