Re: c:forEach items=${%=CONSTANT.MY_C%}...
If you want to use constant fields, check out the archives for this
list...There have been some good posts in the last couple of weeks on how
to accomplish this...JSTL does not provide a mechanism for retrieving
constant values from classes...Of course, there is a tag for it in the
unstandard library...But something about an unstandard library as part of
a standard library just gives me a headache...So, I would stay away from
that and use solutions based on the J2EE spec...
Since you're using Struts, the application resources file is a good place
to stick constant values as well...
On Sat, 26 Jul 2003, Vincent Peytavin wrote:
- Original Message -
From: David M. Karr [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Saturday, July 26, 2003 8:10 AM
Subject: Re: c:forEach items=${%=CONSTANT.MY_C%}...
Vincent == Vincent Peytavin [EMAIL PROTECTED]
writes:
If you need to reference constant values, you can have
your Action or Servlet code put your constants into a bean in some scope.
This
particular issue has been discussed numerous times on this list.
Well, I change my question to this one :
when you have stg like that c:forEach var=my_device
items=${devices_list}
varStatus=index_device
it means that in your Action (suppose you use struts) you do a
session.setAttribute(devices_list, listDevices).
But I'd like to do the same thing by placing the listDevices bean under a
key specified by
Constants.DEVICES_LIST_KEY.
(in Constants class : public static final String DEVICES_LIST_KEY =
devices_list; )
session.setAttribute(Constants.DEVICES_LIST_KEY, listDevices)
How to use this session bean with c:forEach ?
Isn't it a good way to do this kind of thing? I'm newbie with struts/Tag
Libraries and so, i'm waiting for you advice and website documentation.
Thanks for your help!
--
Vincent
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Eric Hauser
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Re: c:forEach items=${%=CONSTANT.MY_C%}...
On Sat, 26 Jul 2003, Eric W Hauser wrote: If you want to use constant fields, check out the archives for this list...There have been some good posts in the last couple of weeks on how to accomplish this...JSTL does not provide a mechanism for retrieving constant values from classes...Of course, there is a tag for it in the unstandard library...But something about an unstandard library as part of a standard library just gives me a headache...So, I would stay away from that and use solutions based on the J2EE spec... The reason why I make sure people are aware of the unstandard-library approach is that they may not have Actions or Servlets. The Java community has a very bad habit of assuming that every situation requires Java coding. This is pretty bad for a web-designer who doesn't understand Java but is quite happy with tags. Unstandard taglib exists primarily for people who do not have a Servlet or use one of the Model-2 MVC setups. Something I do plan to add is a more powerful un:bindAll tag which will bind all constants in a class/interface into the session. I seem to recall that Java web containers also have the ability to run a class on startup (?) so another approach might be to have something nice tucked in there. Hen - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: c:forEach items=${%=CONSTANT.MY_C%}...
On Sat, 26 Jul 2003, Henri Yandell wrote: On Sat, 26 Jul 2003, Eric W Hauser wrote: If you want to use constant fields, check out the archives for this list...There have been some good posts in the last couple of weeks on how to accomplish this...JSTL does not provide a mechanism for retrieving constant values from classes...Of course, there is a tag for it in the unstandard library...But something about an unstandard library as part of a standard library just gives me a headache...So, I would stay away from that and use solutions based on the J2EE spec... The reason why I make sure people are aware of the unstandard-library approach is that they may not have Actions or Servlets. The Java community has a very bad habit of assuming that every situation requires Java coding. This is pretty bad for a web-designer who doesn't understand Java but is quite happy with tags. Unstandard taglib exists primarily for people who do not have a Servlet or use one of the Model-2 MVC setups. Something I do plan to add is a more powerful un:bindAll tag which will bind all constants in a class/interface into the session. I seem to recall that Java web containers also have the ability to run a class on startup (?) so another approach might be to have something nice tucked in there. Hen That approach requires using the interface ServletContextListener and setting that up in your web.xml...That is my prefered way of achieving those results... --- Eric Hauser [EMAIL PROTECTED] (317) 679-4766 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
