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From Henri Yandell <bay...@generationjava.com>
Subject Re: Dynamic string replacement?
Date Wed, 11 Sep 2002 13:32:55 GMT

Yep. Basically this is what we talk about when we discuss JSTLizing the
String library. I would hook up the JEL thingy to the input.

To be honest, I think it would simply involve:

1) Find the code needed in JSTL to implement this
2) Change StringTagSupport. Then all String tags are JEL'd.
3) Figure out which jar is needed to get the JEL code.

JSP 2.0 will invalidate the need for this, but I suspect it's a ways off.
So I'm happy for the String taglib to go ahead and have this and will
implement it if a patch doesn't appear at some point :)

My focus at the moment is to rearrange the tags themselves and commit the
changes all at once [after a notice of upcoming changes to the Users
list] so I don't irritate everyone with a changing library.

Any suggestions here are welcomed :) Possibly I should release a
stable-prior-to-changes-something.jar before breaking things. Will see if
that has approval on the dev list.

Hen

On Wed, 11 Sep 2002 Eric.Lewis@swissinfo.ch wrote:

> Hi all
>
> It looks like I found something to implement in the String Tag Library  :-)
>
> What I'm trying to do is to create links within a text, i.e. replacing 'the
> text' with '<a href="...">the text</a>'. The problem is that both the text
> and the link are dynamic.
> However, the String Tag Library won't let me replace things dynamically.
>
> Consider this:
>
> <c:set var="a" value="This will be replaced"/>
> <c:set var="b" value="The new text"/>
> <c:out value="${a}"/><br>
> <c:out value="${b}"/><br>
> <str:replace replace="This will be replaced" with="The new text">And he
> said: "This will be replaced!".</str:replace>
>
> will show
>
> This will be replaced
> The new text
> And he said: "The new text!".
>
>  - works like a charm! However,
>
> <c:set var="a" value="This will be replaced"/>
> <c:set var="b" value="The new text"/>
> <c:out value="${a}"/><br>
> <c:out value="${b}"/><br>
> <str:replace replace="${a}" with="${b}">And he said: "This will be
> replaced!".</str:replace>
>
> won't replace anything:
>
> This will be replaced
> The new text
> And he said: "This will be replaced!".
>
>
> And
>
> <c:set var="a" value="This will be replaced"/>
> <c:set var="b" value="The new text"/>
> <c:out value="${a}"/><br>
> <c:out value="${b}"/><br>
> <str:replace replace="<c:out value="${a}"/>" with="<c:out
> value="${b}"/>">And he said: "This will be replaced!".</str:replace>
>
> even gives me an exception:
>
> javax.servlet.ServletException: /jsp/test.jsp(206,40) Attribute ${a} has no
> value
>
>
> This would be very, very handy if it worked... actually for all of the
> String tag library.
>
> Thanks & regards,
> Eric
>
>
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>


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