RE: Iterate certain number of times?
jakarta taglibs has a utility:for tag - http://jakarta.apache.org/taglibs Mac Ferguson Senior Developer, Communicopia Inc. -Original Message- From: shunhui zhu [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 01, 2001 1:05 PM To: [EMAIL PROTECTED] Subject: RE: Iterate certain number of times? Hi, I have a similar problem. I'd like to use the iterate tag to present a list of objects in a tabular form, but I'd like to specify how many per row. Is there an easy way to do that using only the tags? Thanks. Shunhui --- [EMAIL PROTECTED] wrote: Does anyone know if any of the other taglibs provides a for loop? Dave [EMAIL PROTECTED] on 04/30/2001 01:27:07 PM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: David Hay/Lex/Lexmark) Subject: RE: Iterate certain number of times? Hey that's pretty cool. I got it working in about 10 minutes. One question though. I had to move my iterate bean from Request to Session scope. Is there any way to keep it at the request level? Thanks, Donnie Hall |+-- || kbasel@freemail.| || absa.co.za | || | || 04/27/2001 03:21| || PM | || Please respond | || to struts-user | || | |+-- --- -| | | | To: [EMAIL PROTECTED] | | cc: (bcc: Donnie Hall/Enron Communications) | | Subject: RE: Iterate certain number of times?| --- -| Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave __ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/
RE: Iterate certain number of times?
Does anyone know if any of the other taglibs provides a for loop? Dave [EMAIL PROTECTED] on 04/30/2001 01:27:07 PM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: David Hay/Lex/Lexmark) Subject: RE: Iterate certain number of times? Hey that's pretty cool. I got it working in about 10 minutes. One question though. I had to move my iterate bean from Request to Session scope. Is there any way to keep it at the request level? Thanks, Donnie Hall |+-- || kbasel@freemail.| || absa.co.za | || | || 04/27/2001 03:21| || PM | || Please respond | || to struts-user | || | |+-- | || | To: [EMAIL PROTECTED] | | cc: (bcc: Donnie Hall/Enron Communications) | | Subject: RE: Iterate certain number of times?| | Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave
RE: Iterate certain number of times?
Hi, I have a similar problem. I'd like to use the iterate tag to present a list of objects in a tabular form, but I'd like to specify how many per row. Is there an easy way to do that using only the tags? Thanks. Shunhui --- [EMAIL PROTECTED] wrote: Does anyone know if any of the other taglibs provides a for loop? Dave [EMAIL PROTECTED] on 04/30/2001 01:27:07 PM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: David Hay/Lex/Lexmark) Subject: RE: Iterate certain number of times? Hey that's pretty cool. I got it working in about 10 minutes. One question though. I had to move my iterate bean from Request to Session scope. Is there any way to keep it at the request level? Thanks, Donnie Hall |+-- || kbasel@freemail.| || absa.co.za | || | || 04/27/2001 03:21| || PM | || Please respond | || to struts-user | || | |+-- | | | | To: [EMAIL PROTECTED] | | cc: (bcc: Donnie Hall/Enron Communications) | | Subject: RE: Iterate certain number of times?| | Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave __ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/
Re: Iterate certain number of times?
Levi, Thanks for your thoughts. However, I believe I am doing things correctly as follows: this page displays a formatted version of a logfile on the server. This logfile can be up to 50 MB in size, and a filtering mechanism is provided so the user can browse the whole file, or certain categories of log entries. Obviously, with a file of this size, it is not feasible to load it all into memory at one time, and use a pager tag to display it. Instead, I do the necessary filtering, and create a list of file pointers to the log entries the use wishes to see (things are further complicated as the variably length log entries have to be reversed to display in chronologically descending order, instead of ascending). When the user requests the next page, the next chunk of log entries are retrieved from the file through the action and displayed. Everything is working nicely, and I want to put the finishing touches on it to simply display links to each page, rather than just next and previous. In my initial action I calculate how many pages I have etc. and simply want to do a for loop to create the links. As Niall pointed out, I could load these page numbers into a Collection and then use the iterate tag, but this seems to be be overkill. Is there really not a Struts tag to do a for loop?!!! If not, I belive that it is a major lack. Are there any plans to introduce one, maybe when the logic tags are improved? Thanks. Any other ideas gratefully received! Dave Levi Cook [EMAIL PROTECTED] on 04/27/2001 05:38:22 PM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: David Hay/Lex/Lexmark) Subject: Re: Iterate certain number of times? Of course I have no idea what your system actually looks like, but I would question its retrieving data all the way up to the view layer and then not displaying it. If possible I would reconsider the design of the controllers responsible for constructing the Collection you are interested in iterating over. Consider the following method signatures in a hypothetical controller for searching a product catalog: public Collection findProducts(ProductInfo searchCriteria) vs. public Collection findProducts(int startIndex, int count, ProductInfo searchCriteria) vs. public Iterator findProducts(int startIndex, int count, ProductInfo searchCriteria) I would expect the first to return a collection of every product in my entire system. I believ this is probably what your system is doing and I wouldn't consider it especially useful in a controller responsible for supporting a view. The second approach introduces a bit more flexibility by allowing the view the decide how many products its interested in displaying. The third approach is probably what I would prefer, I think it just clarifies the intent of the method for view builders.. Might be a little stronger form of encapsulation too. Just my thoughts anyway, hope its useful, Levi Cook - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, April 27, 2001 3:46 PM Subject: RE: Iterate certain number of times? Thanks, but I don't need all that functionality. I have already set up the paging in my actions, but want to generate the links myself simply looping through. Is there not a way to loop through some HTML a set number of times in struts (rather than over a collection)?! Dave Karl Basel [EMAIL PROTECTED] on 04/27/2001 04:21:17 PM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: David Hay/Lex/Lexmark) Subject: RE: Iterate certain number of times? Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave
RE: Iterate certain number of times?
Hey that's pretty cool. I got it working in about 10 minutes. One question though. I had to move my iterate bean from Request to Session scope. Is there any way to keep it at the request level? Thanks, Donnie Hall |+-- || kbasel@freemail.| || absa.co.za | || | || 04/27/2001 03:21| || PM | || Please respond | || to struts-user | || | |+-- | || | To: [EMAIL PROTECTED] | | cc: (bcc: Donnie Hall/Enron Communications) | | Subject: RE: Iterate certain number of times?| | Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave
RE: Iterate certain number of times?
Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave
RE: Iterate certain number of times?
Thanks, but I don't need all that functionality. I have already set up the paging in my actions, but want to generate the links myself simply looping through. Is there not a way to loop through some HTML a set number of times in struts (rather than over a collection)?! Dave Karl Basel [EMAIL PROTECTED] on 04/27/2001 04:21:17 PM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: David Hay/Lex/Lexmark) Subject: RE: Iterate certain number of times? Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave
Re: Iterate certain number of times?
Of course I have no idea what your system actually looks like, but I would question its retrieving data all the way up to the view layer and then not displaying it. If possible I would reconsider the design of the controllers responsible for constructing the Collection you are interested in iterating over. Consider the following method signatures in a hypothetical controller for searching a product catalog: public Collection findProducts(ProductInfo searchCriteria) vs. public Collection findProducts(int startIndex, int count, ProductInfo searchCriteria) vs. public Iterator findProducts(int startIndex, int count, ProductInfo searchCriteria) I would expect the first to return a collection of every product in my entire system. I believ this is probably what your system is doing and I wouldn't consider it especially useful in a controller responsible for supporting a view. The second approach introduces a bit more flexibility by allowing the view the decide how many products its interested in displaying. The third approach is probably what I would prefer, I think it just clarifies the intent of the method for view builders.. Might be a little stronger form of encapsulation too. Just my thoughts anyway, hope its useful, Levi Cook - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, April 27, 2001 3:46 PM Subject: RE: Iterate certain number of times? Thanks, but I don't need all that functionality. I have already set up the paging in my actions, but want to generate the links myself simply looping through. Is there not a way to loop through some HTML a set number of times in struts (rather than over a collection)?! Dave Karl Basel [EMAIL PROTECTED] on 04/27/2001 04:21:17 PM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: David Hay/Lex/Lexmark) Subject: RE: Iterate certain number of times? Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave
RE: Iterate certain number of times?
Or a related feature, to know how many times you've iterated? I had need to know when I was on my last iteration so I could not put in an HR. I think it could be done differently, but right now, I'm actually porting an existing site to struts. I broke down and just put some Java code in to have a counter that I could check. I do hope improving the logic tags is on the list somewhere. They are pretty restrictive if you don't want to extend them. Scott -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, April 27, 2001 1:46 PM To: [EMAIL PROTECTED] Subject: RE: Iterate certain number of times? Thanks, but I don't need all that functionality. I have already set up the paging in my actions, but want to generate the links myself simply looping through. Is there not a way to loop through some HTML a set number of times in struts (rather than over a collection)?! Dave Karl Basel [EMAIL PROTECTED] on 04/27/2001 04:21:17 PM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: David Hay/Lex/Lexmark) Subject: RE: Iterate certain number of times? Hi, There's a good pager taglib at jsptags.com. I've used it in a struts app and does the job quite well when embedded in the iterate tags. logic:iterate pg:item Item Details /pg:item /logic:iterate Hope it helps, karl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: 27 April 2001 09:29 To: [EMAIL PROTECTED] Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave
RE: Iterate certain number of times?
I know its not that elegant, but generate an array of page numbers in your
ActionForm based on the count
private int pageCount;
public String[] getPages() {
String[] pages = new String[pageCount];
for (int i = 0; i pageCount; i++) {
int j = i + 1;
pages[i] = +j;
}
return pages;
}
Alternatively, write your own Tag which will look up a specified value in
your bean and loop the appropriate number of times.
Niall
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: 27 April 2001 20:29
To: [EMAIL PROTECTED]
Subject: Iterate certain number of times?
Hi.
Am wanting to iterate a certain number of times, based on a value
in my form
bean, to create a set of page links for the number of pages the
user can view
(similar to at the bottom of most search engine results).
How do I do this with Struts? Obviously I am not iterating over
a collection.
But surely it is possible - what am I missing?
Many thanks,
Dave
Re: Iterate certain number of times?
Dave Try the pager taglib from jsptags.com http://jsptags.com/tags/ Vince - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, April 27, 2001 8:28 PM Subject: Iterate certain number of times? Hi. Am wanting to iterate a certain number of times, based on a value in my form bean, to create a set of page links for the number of pages the user can view (similar to at the bottom of most search engine results). How do I do this with Struts? Obviously I am not iterating over a collection. But surely it is possible - what am I missing? Many thanks, Dave
