Re: if/elseif tag?
The "struts-logic" library includes quite a few
variations of an "if" tag that
can perform different sorts of conditional checks
for you. At the moment,
however, there is nothing that provides the "else"
or "elseif" construct. This
is mostly because I've yet to see a syntax for this
that is:
* consistent with the XML syntax required by JSP
custom tags
* easily understood by page authors
* not butt-ugly to look at or to type
I'm open to suggestions for a solution to these
issues.
Mike Campbellemail: [EMAIL PROTECTED]
Craig
I'm not too familiar with custom tag writing, so I don't know how
technically feasible this is, but... how about a "cond" tag (similar to
lisp's cond), whose body can contain multiple "test" tags. The first
test which evaluates to true is allowed to render its body, and then
further processing is inhibited. This would have the effect of "if,
else if, else if ...".
logic:cond
logic:equal name="name" property="property" value="A"The value is
A/logic:equal
logic:equal name="name" property="property" value="B"The value is
B/logic:equal
logic:equal name="name" property="property" value="C"The value is
C/logic:equal
logic:trueAn unexpected value?/logic:true
/logic:cond
... which should be equivalent to ...
if (name.getProperty().equals("A")) {
out.write("The value is A");
}
else if (name.getProperty().equals("B")) {
out.write("The value is B");
}
else if (name.getProperty().equals("C")) {
out.write("The value is C");
}
else if (true) {
out.write("An unexpected value?");
}
Jim N.
Re: if/elseif tag?
Mike Campbell wrote: Are there any tags in the struts library (or do you know of any anywhere) which allow an if elseif elseif . . . end if type of construct? The "struts-logic" library includes quite a few variations of an "if" tag that can perform different sorts of conditional checks for you. At the moment, however, there is nothing that provides the "else" or "elseif" construct. This is mostly because I've yet to see a syntax for this that is: * consistent with the XML syntax required by JSP custom tags * easily understood by page authors * not butt-ugly to look at or to type I'm open to suggestions for a solution to these issues. Mike Campbell email: [EMAIL PROTECTED] Craig
Re: if/elseif tag?
Check out chapter 14 of the book "Core Servlets and JSP" by Marty Hall. There is a web site with the sources at http://archive.coreservlets.com/ --- "Craig R. McClanahan" [EMAIL PROTECTED] wrote: Mike Campbell wrote: Are there any tags in the struts library (or do you know of any anywhere) which allow an if elseif elseif . . . end if type of construct? The "struts-logic" library includes quite a few variations of an "if" tag that can perform different sorts of conditional checks for you. At the moment, however, there is nothing that provides the "else" or "elseif" construct. This is mostly because I've yet to see a syntax for this that is: * consistent with the XML syntax required by JSP custom tags * easily understood by page authors * not butt-ugly to look at or to type I'm open to suggestions for a solution to these issues. Mike Campbellemail: [EMAIL PROTECTED] Craig __ Do You Yahoo!? Yahoo! Photos - Share your holiday photos online! http://photos.yahoo.com/
Re: if/elseif tag?
On 12/22/2000 at 4:22 PM Mike Campbell wrote: As luck would have it, that book arrived at my door just last night, so I'll be checking that out over the holidays. It's a good read, you'll enjoy it. I just finished a quick skim of Core JSP (1st edition), but haven't quite decided about it. There's a healthy amount of hard information, but the writing is choppy. But I guess that comes with being a 1st edition. No question about Marty Hall's though. A definite keeper. *** REPLY SEPARATOR *** "TH" == Ted Husted [EMAIL PROTECTED] writes: TH See http://archive.coreservlets.com , Chapter 14, Using Nested Tags. TH This is the source code from Marty Hall's Core Servlets and JavaServer TH Pages. Excellent. Thanks again Ted!
