Re: Status of this project
On 5/4/06, dizzi [EMAIL PROTECTED] wrote: Thx, with speed in which ive got answer i see that velocity is not dead :) I have one more question (pretty much offtopic) Im using eclipse, im curious which plugins are you using to develop tomcat+struts+velocity applications or which you can recommend. (it will be probably better reply to my email than this list) Yeah, it's not so much dead as so stable as to not need to upgrade. I've been using 1.3.1 for years as has the Cayenne project. I typically use VelocityUI/velocity editor or Veloeclipse (one is a fork of the other). - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to use DateTool
On 4/4/06, Dominik Bruhn [EMAIL PROTECTED] wrote: So how do I use this tool? http://jakarta.apache.org/velocity/tools/javadoc/org/apache/velocity/tools/generic/DateTool.html - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Release of Velosurf 1.4
My Understanding (and I've never actually used it) is that it's a direct view-to-database framework. I've recommended velosurf in the past to someone who was trying to convert a Cold Fusion project to j2ee as a first pass. I've never looked at Torque, though. On 3/12/06, Tom Schindl [EMAIL PROTECTED] wrote: What's the difference to projects already existing like e.g. torque, which also uses velocity? Tom Claude Brisson wrote: I'm pleased to anounce the release of Velosurf 1.4 About : Velosurf is a thin but efficient database mapping tool meant to be used with Jakarta Velocity. Its aim is to generate a set of context variables that automatically map database tables and relationships, without the need for any recomplation. Changes : The main purpose of this release is to allow the use of POJOs (Plain Old Java Objects) as row instances. Getters and setters of those POJOs are discovered using Java reflection. Homepage: http://velosurf.sourceforge.net/ List: http://lists.sourceforge.net/lists/listinfo/velosurf-devel Tarball: http://prdownloads.sourceforge.net/velosurf/velosurf-1.4.tgz?download - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Background material on Template Engines?
Friday, February 3, 2006, 6:12:11 PM, Elmar Juergens wrote: However, for the thesis itself, I would like to write some background paragraphs on template engines, on topics like: - how did template engines evolve? On 2/3/06, Daniel Dekany [EMAIL PROTECTED] wrote: Like, for example, Velocity was a me-too project after WebMacro due licensing issues with WebMacro. (So it's maybe a good idea to put this question on the list of some other template engines too, where the template engine was made because of technical reasons, rather than from political reasons.) For what it's worth, here's an early template engine (wow, 10 years old now!) I originally used. When I switched from ObjC to Java, I converted my templates to velocity fairly painlessly. http://www.misckit.com/Documentation/IntroMiscMergeKit.htmld/index.html Here's what appears to be current contact info for Don, although I haven't talked with him in a few years :) I'm pretty sure he'd be happy to discuss template engine evolution, at least from his own standpoint. http://www.yacktman.org/don/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Date Formatting
If you're using a standalone-application, you can just manually add
the tool to your context.
context.put(dateTool, new DateTool());
or you can write your own toolbox loader.
Note that I used the following in a struts application to create an
email toolbox, and it's also for v1.1, so it's only good as a
reference:
public VelocityContext getEmailToolboxContext() throws ChainedException
{
try
{
ServletContext servletContext = getServletContext();
/* check the servlet config for a toolbox */
String toolboxFile = /WEB-INF/email.toolbox.xml;
XMLToolboxManager mgr = null;
InputStream is = null;
try
{
// get the bits
is = servletContext.getResourceAsStream(toolboxFile);
if (toolboxFile != null)
{
// little fix up
if (!toolboxFile.startsWith(/))
{
toolboxFile = / + toolboxFile;
}
// get config file pathname
String pathname = servletContext.getRealPath(toolboxFile);
}
else
{
Velocity.info(VelocityViewServlet: No toolbox
entry in configuration.);
}
InputStream inputStreamFromToolboxFile = is;
// InputStream inputStreamFromToolboxFile = new
FileInputStream(toolbox.xml);
class MyToolboxManager extends XMLToolboxManager{};
mgr = new MyToolboxManager();
mgr.load(inputStreamFromToolboxFile);
}
finally
{
try
{
if (is != null)
{
is.close();
}
}
catch(Exception ee) {}
}
ToolboxContext toolCtx = mgr.getToolboxContext(null);
return new VelocityContext(toolCtx);
}
catch (Exception anException)
{
ChainedException newChainedException = new
ChainedException(anException, Unable to create Toolbox Context );
throw newChainedException;
}
}
On 1/17/06, Edward Song [EMAIL PROTECTED] wrote:
Hi,
I have been trying to get the generic velocity tools to work with my java
application.
The application sends out emails, and I am using Velocity to generate the
HTML string to be sent in the email.
The one thing I am looking to do is to have a java.util.Date object
formatted for presentation.
I saw and downloaded the velocity tools packages and added
velocity-tools-generic-1.2.jar to my classpath.
I then restarted my app and found that the DateTool still does not format
the date.
I take a look at the examples, and a lot of the examples use the
VelocityViewServlet and pass in a parameter pointing to toolbox.xml. My
application is standalone and has no use for struts. Without this
configuration it seems that VelocityTools will not know where to look for
toolbox.xml.
How do I specify this location in a standalone application?
Ed
-Original Message-
From: Edward Song [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 17, 2006 11:44 AM
To: 'Velocity Users List'
Subject: RE: Date Formatting
Nevermind, found the DateTools.
http://jakarta.apache.org/velocity/tools/javadoc/org/apache/velocity/tools/g
eneric/DateTool.html
-Original Message-
From: Edward Song [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 17, 2006 11:37 AM
To: 'Velocity Users List'
Subject: Date Formatting
Hi all,
Is there a way to perform simple date formatting from a date object within a
velocity template?
I haven't found anything in the user guide and developer guide about date
formatting.
I don't think that the developer should have to format the date and add it
to the context.
Shouldn't template editors have this capability?
I would think that it exists, I just don't know where to look, can someone
point me to the correct resource.
Thanks for your time,
Ed
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Re: How to put # in the string
The most reliable way to do this is to use
#set ($h = '#')
And then ${h} whenever you want a # to appear. (or ${esc.h} without
the #set if you have the escape tool installed)
This works in all cases exactly as you'd expect. Avoid using \ to
escape things -- it's not intuitively obvious how it works.
On 11/18/05, Will Glass-Husain [EMAIL PROTECTED] wrote:
Velocity's silly escaping rules insist that you put the slash before a
directive \#if
but not before a # by itself. Just leave off the slash.
WILL
- Original Message -
From: Gérard BUNEL [EMAIL PROTECTED]
To: velocity-user@jakarta.apache.org
Sent: Friday, November 18, 2005 1:07 AM
Subject: How to put # in the string
Hello,
I need to insert a # character in my template but doing so, like in
example2 modified below, I get an Error:
String s = We are using $project $name to render this.\\#;
w = new StringWriter();
try
{
Velocity.evaluate( context, w, mystring, s );
}
ParseErrorException : org.apache.velocity.exception.ParseErrorException:
Lexical
error: org.apache.velocity.runtime.parser.TokenMgrError: Lexical error at
line
1, column 47. Encountered: EOF after :
So how could I insert this character in my template ?
--
BUNEL Gerard - ATLANTIDE
Consultant
Tel. : +33 (0)2 98 05 43 21
http://www.ago.fr/
--
Technopôle Brest Iroise
Site du Vernis - CS 23866
29238 Brest Cedex 3 - France
Tel. : +33 (0)2 98 05 43 21
Fax. : +33 (0)2 98 05 20 34
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Re: Situation jsp versus vm
Have you tried:
#set ( $a = $request.getAttribute(a) )
#set ( $x = ${a}b )
#set ( $y = $request.getAttribute($x) );
Or just
#set ( $y = $request.getAttribute(${request.getAttribute(a)}b) );
On 11/17/05, Marcel de Koster [EMAIL PROTECTED] wrote:
Hi,
I want to use velocity, but I'm faced with a problem I don't know thie
answer for:
JSP:
%
String a = request.getAttribute(a).toString();
String x = a + b;
String y = request.getAttribute(x).toString();
%
Velocity:
#set ($x = $a + b) -- doesn't work
#set ($y = ???) -- how do I get a variable from the context if you do not
yet know the name, since it depends on another variable value.
--
Met Vriendelijke Groet,
Marcel de Koster
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Re: how to use a macro along with onClick
Velocity is server-side web page generation. It generates the data you see when you use View Source. What you want is to execute code client-side. You'll need to write javascript to execute code client-side. On 11/17/05, jill han [EMAIL PROTECTED] wrote: I tried to use a macro along with onClick. I expected the macro will be called only after the image was clicked. However it did not turn out as the way I expected. There are scripting error. When I looked at the source codes, onClick = ' Table . ' a href='#' onClick = '#vlmacro($val $va2 $vaList)' img name='image' src='image.gif'/a Is there anyway to use a macro along with onClick? Thanks in advance. Jill - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Is there a line continuation character in Velocity?
Well, it's a misnomer to call ## a line continuation character. It's
a to-end-of-line comment character.
You can't use it to make velocity statements into multiline statements.
You can only use it to make literal text into multiline literal text.
On 11/17/05, Glenn Holmer [EMAIL PROTECTED] wrote:
On Thursday 10 November 2005 08:43, Mike Kienenberger wrote:
Yes, ## comments out the newline and any other trailing text.
I can't get that to work. I have:
$text.get(label.labelsPrinted, ##
[$purchaseOrder.formattedLabelsPrintedDate])
but I get an error:
Encountered ##\n at line 91, column 40. Was expecting one of:
[ ... ... true ... false ... ... ... { ...
What am I doing wrong?
--
Glenn Holmer [EMAIL PROTECTED]
Software Engineerphone: 414-908-1809
Weyco Group, Inc. fax: 414-908-1601
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Re: Is there a line continuation character in Velocity?
There was talk at one point about allowing multi-line statements, but I don't know what relesae of velocity (if any) this feature was scheduled for. On 11/17/05, Glenn Holmer [EMAIL PROTECTED] wrote: On Thursday 17 November 2005 11:33, Mike Kienenberger wrote: Well, it's a misnomer to call ## a line continuation character. It's a to-end-of-line comment character. You can't use it to make velocity statements into multiline statements. You can only use it to make literal text into multiline literal text. Oh nuts. I've an even worse one later in that file... so there's no way to make a 257-character line more readable, then? -- Glenn Holmer [EMAIL PROTECTED] Software Engineerphone: 414-908-1809 Weyco Group, Inc. fax: 414-908-1601 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Newline issues
If you end a line with ##, the rest of the line, including the
newline, is discarded from the output.
So you'd do
#macro (getMonths $month)##
#if ($month == 0)##
Jan #elseif($month == 1)##
Feb##
and so on.
On 11/15/05, Heimerl, Kurtis [EMAIL PROTECTED] wrote:
I have a number of velocity macros that seem to be adding newlines, and i'm
wondering if there is any easy way around this problem. The two offending
macros are:
#macro (getMonths $month)
#if ($month == 0)
Jan #elseif($month == 1)
Feb
#elseif($month == 2)
Mar
#elseif($month == 3)
Apr
#elseif($month == 4)
May
#elseif($month == 5)
Jun
#elseif($month == 6)
Jul
#elseif($month == 7)
Aug
#elseif($month == 8)
Sept
#elseif($month == 9)
Oct
#elseif($month == 10)
Nov
#elseif($month == 11)
Dec
#else
##nothing
#end
#end
and
#macro (adjustYear2k $year)##plus 1900, date object returns years since 1900
#set ($year = $year + 1900)
$year
#end
when put into this block of vm code (ignore the depreciated date object)
#set ($year = ${popupModel.batchInfo.getBatchStartDate().getYear()})
#set ($month = ${popupModel.batchInfo.getBatchStartDate().getMonth()})
#set ($hour = ${popupModel.batchInfo.getBatchStartDate().getHours()})
#set ($minute = ${popupModel.batchInfo.getBatchStartDate().getMinutes()})
#set ($temp = #getMonth($month))
#set ($temp2 = #adjustYear2k($year))
#set ($temp = ${popupModel.batchInfo.getBatchStartDate().getDate()} ${temp}
${temp2})
tdUpload Start Datebr/input type=text readonly=readonly
value='${temp}'//td
i get the following html:
tdUpload Start Datebr/input type=text readonly=readonly value='27 Oct
2005
'/
This causes the 2005 to not be rendered, as it's outside the input object's
one line. I need to remove the newlines that are causing the spacing after
the macro calls, but i can't seem to find where/how to do this. The extra
sets are my feeble attempts to diagnose the issue. I've tried removing all
the newlines from the macros, making them single line functions. This didn't
work. There has to be an easy way to do this, vtl is a templating language,
it's all about data formatting!
Any help would be appreciated.
Kurtis
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Re: Is there a line continuation character in Velocity?
Yes, ## comments out the newline and any other trailing text. On 11/10/05, Jenny Mathew -X (jenmathe - Infosys at Cisco) [EMAIL PROTECTED] wrote: ## seems to provide the line continuation ability. Probably with a prepended so as to ensure that the arguments are separated by white space #set($command=foo) #set($args2=bar) #set($args1=bar) #set($args3=bar) #set($args4=bar) $command $args1 ## $args2 ## $args3 ## $args4 Gives the following output foo bar bar bar bar -Original Message- From: Jenny Mathew -X (jenmathe - Infosys at Cisco) Sent: Thursday, November 10, 2005 11:21 AM To: Velocity Users List Subject: Is there a line continuation character in Velocity? Hi, I have a situation where some lines in the template script may be quite long and for readability purposes we would like to write part of the line on the next line but the merged output should be displayed as a single line. Is there a way to ensure that the same line is stored in the StringWriter after the merge process as a single line? In otherwords is there a line continuation character in velocity? Thanks in advance! Jennifer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Question about ##
You need to use this:
#set ($h = '#')
NumberFormat ss:Format=${h},${h}${h}0.0/
To be safe, you should always escape # and $ symbols.
On 11/7/05, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Hi everyone, I'm using Velocity for generating Excel file. I save my
source file in excel xml format. After that, I add the Velocity tag in
it to be able to parse it. Everything work great eccept the faq that
Excel save the format of a Cell in the format #,##0.0. So Velocity trap
that as a comment and wipe the rest of the line.
The file became a not valid xml after that of course.
So my question is: Is there a way to tell Velocity to not parse the
comment ? Or does exist a way to change the comment sing ? If not,
Someone have a good idea to overcome that issue? I can't espace ## sign
in the template because Excel will not recognize it after that.
Here a example of the tag in problem.
Style ss:ID=s34
Font ss:FontName=Arial Narrow x:Family=Swiss/
NumberFormat ss:Format=#,##0.0/
/Style
Sorry for the bad english. I'm french.
Thanks everyone for your help. Sorry if the question already been ask. I
search on the archive of the mailing list and found nothing.
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Re: whitespaces, why?
Use ## for blank lines.
Use ## at the end of every non-blank line.
This will get rid of all newlines.
For example:
#macro(relation $lrelations $number)##
##
#set($i = 0)##
##
#foreach($rel in $lrelations)##
##
#set($i = $i+1)##
##
#if($number == $i)##
##
$rel##
##
#end## if
##
#end## foreach
##
#end## macro
On 11/4/05, Pascual Queralt [EMAIL PROTECTED] wrote:
Hi to everyone.
Well, I am starting with Velocity and I have a problem with the whitespaces
that appear when I call a Velocimacro.
My Velocimacro is the next.
#*
* Obtenemos el nombre de la relacion $number
* que se encuentra en en el conjunto de relations
*#
#macro(relation $lrelations $number)
#set($i = 0)
#foreach($rel in $lrelations)
#set($i = $i+1)
#if($number == $i)
$rel
#end
#end
#end
and the sentence that call this velocimacro is the next:
##
ceq ModelGenHidden (#relation($relations 1) ; ? Set{ N, M } ? Model ?
TargetMM ?
##
but the result I get in the console is :
##
ceq ModelGenHidden (
Package2Schema
; ? Set{ N, M } ? Model ? TargetMM ? TracMM)
##
Does anybody know how I can prevent this white spaces??
Many thanks.
Pascual
-
Correo Yahoo!
Comprueba qué es nuevo, aquí
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Re: Best practice for escaping?
These two techniques are what I've used to write templates that
generate other velocity templates. As Ahmed says, it makes the code
hard to read, but there aren't any better options in Velocity yet.
In the Objective C templating engine I used before Velocity, it was
handled by changing the starting and ending delimiters. Ie, instead
of #{if}, you'd change the delimiters to *if*.
Velocity doesn't currently support changing delimiters (or even
starting/ending delimiters for directives), so you'll have to use
something else if you aren't willing to live with escaping all # and $
symbols.While maintaining such templates is a nightmare, creating
them initially isn't a big deal since you can just do a global find
and replace of both symbols.
On 10/27/05, Nathan Bubna [EMAIL PROTECTED] wrote:
personally, my recommendation would be to ditch the escaping rules for
variables and go with the following:
#set( $D = '$' )
${D}myVar
or you can add the new EscapeTool (in VelocityTools 1.2-rc1) to your
context and do:
${esc.d}myVar
escaping is really a pain if you aren't sure whether a variable will
be there or not. i haven't done it to generate another velocity
template, but the thought is unpleasant. :)
On 10/27/05, Ahmed Mohombe [EMAIL PROTECTED] wrote:
Hi,
Is there a best practice on how to escape a velocity template.
(so in order to generate another velocity template?).
The escaping rules are clear however it seems a nightmare to me
to apply them because of the fact that 'undefined' variables are threated
different by the escape rule.
The problem is that some variables exist both in the source and the target
template.
At the moment I tried so many 'tweakings' and I never get what I expect.
I'm at the point to use another template engine to generate velocity
templates,
just to avoid the escaping nightmare.
Thanks in advance,
Ahmed.
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Re: url rewriting in Velocity
In Struts with velocity, I did this by creating a subclass of linkTool that encoded the url and creating a servlet that decoded the url and forwarded it to my real servlet.My goal wasn't to just encode the url but to preserve page-scoped values, so it's not a direct match, but the same ideas should work. Note that the matching between the encoded and unencoded urls was stored in the session for each user. I suppose another way to do it would be to simply encrypt the url and then you'd just need to store the encryption key in your application. On 10/12/05, Sreeni Gali [EMAIL PROTECTED] wrote: Hi guys, How to do url rewriting in Velocity. In my velocity page there is an anchor link to another velocity page. example has given below http://localhost:8080/rgcip/ViewProjectFinancialSummary.vm?tabName=ProjectssearchMessage=Project%20Financialname=FinancialusDotNo1=US123456 i don't want to expose this name and value pair in the browser . How to do URL rewriting in velocity so then i can use that to rewrite my url so the person con't understand the url. is there any suggestion to do this? Thanks advance. Regards Gali - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Whitespace and Nitpicking
Not all output can be run through a cleaner. One of the things I use Velocity for is to generate plain-text email. It requires that I have complete control over line-breaks and output. A general purpose templating language must have a known methodology for generating whitespace. Velocity has one, but it's not inituitive. On 10/8/05, Andrew Mason [EMAIL PROTECTED] wrote: Can I just make a quick point on the whole whitespace issue. Velocity provides you with a couple of ways to handle your own output. For example using String writers etc...I use a really nice set of classes called JTidy for HTML output, you can run your output through that and create perfectly tidy HTML (and valid if your designer isn't so talented). There is also nothing to stop you from writing your own cleaner for other languages where an implementation isn't already there. I can understand why people want these features in velocity, Yes it would be handy, yes it should be added as enough people want it, but I'm not sure it's as critical as many people make it out to be (i could be wrong). You are given methods to allow you to run the output through what ever classes you want. The only time where this may not work is when your doing servlets with the old VelocityServlet (i still don't use VelocityViewServlet yet so the option maybe available in that too). Andrew - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: What's the ideal syntax? Was: [ANN] Viento - WHY?
Sure there is.
This is handled by the Objective-C MiscMergeKit template engine by
having all variables and directives enclosed in a starting and ending
tag.
Ie, #if (x)# text #else# text #endif#
or ${if (x)} text ${else} text ${endif}
The actual starting and ending tags can at any point be changed using a
#delimiters new-left-delimiter new-closing-delimiter # directive.
Ie,
## write html template info
#delimiters {$ $} #
write shell script template info
{$delimiters # # $}
write more html template info
I haven't found it all that useful to switch delimiters in the middle of a
template, but I definitely have found it useful to switch delimiters
at the start of a file.
On 10/8/05, Jason Pettiss [EMAIL PROTECTED] wrote:
It's an interesting question... I guess it's a tradeoff between syntax
stability and error robustness. The former favors smart users who are
used to dealing with the absolutes imposed by programming languages, the
latter, artsy-fartsy types who honestly have trouble terminating html
elements properly.
JSP for example has absolute delimiters which are glaring (and ugly).
You get one of those wrong, your whole page breaks fantastically, and
without a nice error system or checking the logs, you won't know where
the problem is. Taglibs just make things worse because in a page that's
designed to generate HTML they hide really well... and still even one
mistake and BOOM! Developers dislike it, artists fear it...
Velocity needs just a single character most of the time, and it's very
tolerant of mistakes. Most of the time it'll spit out a full page and
the non-technical user can see exactly where they screwed up, and why.
This makes it very friendly for the user, and intuitive for most
purposes, but at the expense of having an absolute way to escape and
delimit... which means sometimes the mechanism breaks down. Typically
this is just a minor annoyance to a non-technical user, who most of the
time doesn't grasp the difference between dynamic and static content
anyway-- and so is using trial and error, and will do so here, to get
over the little stumbling blocks imposed by a very liberal syntax.
Due to the lack of reliable escaping, Velocity would break down entirely
if the page being generated were, say... oh I dunno... another Velocity
template! Fortunately this is highly uncommon and I don't think it's
the intention of the language. Velocity also isn't well suited for
strict content where whitespace and newlines really matter-- like
certain WML-- but then again, JSP is pretty terrible at this too. As a
general purpose template language in a world awash with XML and HTML
lookalikes, Velocity does well. If the web were composed of shell
scripts I am sure it wouldn't be as well accepted.
I do think there's got to be a way to get the flexibility and liberal
syntax in the 90% scenario, yet have a way to reliably escape, delimit,
control whitespace conventions, etc, in the other cases. Also-- the
template language I want also lets me choose the syntax markers and
define them in the content. Then all I have to do is choose delimiters
which don't appear that often in the page, and I'm always basking in the
sunny 90% scenario... ;-)
About the macro-with-body... that's really just two macros on either
side of some content, isn't it? Its nice to not have to remember to
close, but you have to do that with for loops and if statements and
comments anyway, right?
--jason
Daniel Dekany wrote:
Friday, October 7, 2005, 11:12:21 PM, Chad Meadows wrote:
I simply don't quite understand what seems to be a pushback to
acknowledging there is a community of people who do not like the syntax. I
have shown the syntax of velocity side by side with freemarker among those
who had never seen either. Velocity was preferred.
[snip]
DISCLAIMER: This will NOT be a FreeMarker advertisement. Also, I do NOT
like the FreeMarker syntax (but not because of it usage of cryptic
delimiters... there other things historically bungled in it), although I
surely prefer it over Velocity's.
meta-discussion
The unimportant thing what I want to say is that Jonathan behaves
roughly in this case because he becomes angry when he faces exactly the
same case of, well, apparent lack of professional experience (read:
***IGNORANCE!!!***, just I don't wanted to say that :)) again and again
and again... the syntax stuff. (Plus, he is pissed of on Jakarta people
in general, so it's not the place where he will try to keep cool his
blood when it wants to boil.)
/meta-discussion
So, what apparent lack of professional experience do I refer to?
One thing is that evaluating a template language primarily based on the
first impression look and feel goodness of its syntax is, well... Even
evaluation a template engine primarily based on it syntax is, well...
(as far as the syntax is within the borders of sanity, that is). But let
this alone now
Re: What's the ideal syntax? Was: [ANN] Viento - WHY?
Daniel Dekany wrote: No template language can be too good at that... Simply, the basic idea of a template languages is incompatible with strict white-space control. On the contrary, template languages are *IDEAL* for strict white-space control. That's the whole template part of template language. A template language is a means to specify an exact output format, and whitespace is part of that. Even velocity has strict white-space control. It just happens to have a non-intuitive implementation. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: What's the ideal syntax? Was: [ANN] Viento - WHY?
On 10/8/05, Jonathan Revusky [EMAIL PROTECTED] wrote: Again, the fact that it is possible to achieve precise control of whitespace is not the key point. It is that you want such control while having a reasonable, human-readable template. That is the raison d'être of templates really. In a word, No. The reason for having templates is to generate controlled formatted output. The key point is that control over whitespace is often a necessity. A worthy subgoal might be that the template is easy to read, but that's just a nice extra, not a key point. I can live without the templates being easy to read. I can't live with uncontrollable formatting. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [ANN] Viento
And add java and jsp/jsf and javascript.
Probably some others as well.
On 10/8/05, Will Glass-Husain [EMAIL PROTECTED] wrote:
Hi,
I really like how JSP 2.0 HTML escapes all references by default. Makes
life simpler. It's only the references that matter anyway.
In Velocity 1.5 we've added a special ReferenceInsertionHandler that will
automatically escape all references. This can be configured in
velocity.properties with regular expressions, allowing some expressions to
be escaped and others not. There's also a choice of HTML, XML, and
Javascript escaping. Probably we should add CSS (escape '@' character) and
URL.
Best,
WILL
- Original Message -
From: Austin Taylor [EMAIL PROTECTED]
To: Velocity Users List velocity-user@jakarta.apache.org; Daniel
Dekany [EMAIL PROTECTED]
Sent: Saturday, October 08, 2005 7:17 AM
Subject: Re: [ANN] Viento
What's if you have } in the static text (CSS, JavaScript)?
You're rather obligated to escape it. Right now the stop gap is
$escape('}'). That's going to get old pretty quick. I'm still thinking about
what to do there.
Austin
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Re: Clean way to iterate over a distinct set of items?
Don't draw unwarranted conclusions. I never said anything about using the template as MVC :) In fact, the context makes available a data model, and I use several templates to generate various files based on the data in that model. In this particular case, the task I need to perform should all be done in the view layer anyway. John Withers provided an excellent example of using [] to create the sublist, and when I revisit my templates again, I'll change over to using that method. Thanks, John! On 10/5/05, Daniel Dekany [EMAIL PROTECTED] wrote: Monday, October 3, 2005, 10:04:34 PM, Mike Kienenberger wrote: Yes, the problem is that I don't have access to the context in this situation, only to the template. I needed a 100% VTL solution since I couldn't add anything to the context. That's an ugly situation. An MVC template language can't be used alone for generating pages. It's only works in pair with the action or whatever you call the part that calculates the stuff to display. Otherwise the whole point of it, the separation, lost... -- Best regards, Daniel Dekany - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Clean way to iterate over a distinct set of items?
I'm looking for a clean way to iterate over a distinct set of items. As an example. consider #foreach $employee in $employeeList where $employee.getDepartment() may or may not return a unique value. What I really want to iterate over is the unique set of departments in the employee list. Ideas? And this isn't really what I'm trying to do -- the real example is much more complicated, and there's no easy way to add a tool to the context so that I could have the equivalent of $tool.getUniqueDepartmentsForEmployeeList($employeeList). -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Clean way to iterate over a distinct set of items?
Yes, the problem is that I don't have access to the context in this situation, only to the template. I needed a 100% VTL solution since I couldn't add anything to the context. On 10/3/05, Will Glass-Husain [EMAIL PROTECTED] wrote: Myself, I usually do this in the controller and pass the unique list to Velocity. More often I have a single object (e.g. $form) and just make a method that translates: $form.employeeList $form.uniqueEmployeeList each method drawing from the same original data source. WILL - Original Message - From: Mike Kienenberger [EMAIL PROTECTED] To: Velocity Users List velocity-user@jakarta.apache.org Sent: Monday, October 03, 2005 12:14 PM Subject: Clean way to iterate over a distinct set of items? I'm looking for a clean way to iterate over a distinct set of items. As an example. consider #foreach $employee in $employeeList where $employee.getDepartment() may or may not return a unique value. What I really want to iterate over is the unique set of departments in the employee list. Ideas? And this isn't really what I'm trying to do -- the real example is much more complicated, and there's no easy way to add a tool to the context so that I could have the equivalent of $tool.getUniqueDepartmentsForEmployeeList($employeeList). -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Clean way to iterate over a distinct set of items?
Thanks. Creating a HashSet was my first thought at well, but I
couldn't remember the syntax, nor under what situations it was allowed
:)
What I have works, and while it's ugly, it's good enough :) If I'd
seen the newInstance() example first, I would have went with that,
though.
And congrats, Nathan! Your addition to the core velocity
contributors has been a long time coming!
On 10/3/05, Nathan Bubna [EMAIL PROTECTED] wrote:
well, since Will's proposed security enhancements haven't yet arrived,
why not do something like:
#set( $set = $anything.class.forName('java.util.HashSet').newInstance() )
#foreach( $thing in $list )##
$!set.add($thing.subThing)##
#end
#foreach( $subThing in $set )
$subThing
#end
:)
On 10/3/05, Mike Kienenberger [EMAIL PROTECTED] wrote:
Yes, the problem is that I don't have access to the context in this
situation, only to the template. I needed a 100% VTL solution since I
couldn't add anything to the context.
On 10/3/05, Will Glass-Husain [EMAIL PROTECTED] wrote:
Myself, I usually do this in the controller and pass the unique list to
Velocity. More often I have a single object (e.g. $form) and just make a
method that translates:
$form.employeeList
$form.uniqueEmployeeList
each method drawing from the same original data source.
WILL
- Original Message -
From: Mike Kienenberger [EMAIL PROTECTED]
To: Velocity Users List velocity-user@jakarta.apache.org
Sent: Monday, October 03, 2005 12:14 PM
Subject: Clean way to iterate over a distinct set of items?
I'm looking for a clean way to iterate over a distinct set of items.
As an example. consider
#foreach $employee in $employeeList
where $employee.getDepartment() may or may not return a unique value.
What I really want to iterate over is the unique set of departments in
the employee list.
Ideas?
And this isn't really what I'm trying to do -- the real example is
much more complicated, and there's no easy way to add a tool to the
context so that I could have the equivalent of
$tool.getUniqueDepartmentsForEmployeeList($employeeList).
-Mike
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Re: Static calls, and accessing map of maps
On 9/28/05, Daniel Brownell [EMAIL PROTECTED] wrote: I have 2 questions: the first, is, can I get from an int to an integer in the VTL, as so: $Integer.getInteger($String.valueOf($myInt))? It just prints all that text back out, so I don't know if it works. You can't call static methods from Velocity. You can use NumberTool if you install it into your context: http://jakarta.apache.org/velocity/tools/javadoc/org/apache/velocity/tools/generic/NumberTool.html $numbertool.toNumber(0) Note that $myInt should already be a Number since I don't think you can store primitive types in velocity. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Escaping HTML control characters within velocity?
http://wiki.apache.org/jakarta-velocity/EscapeTool
Particularly,
http://svn.apache.org/viewcvs.cgi/jakarta/velocity/tools/trunk/src/java/org/apache/velocity/tools/generic/EscapeTool.java?view=markup
On 9/13/05, Peter Locke [EMAIL PROTECTED] wrote:
I display some text that may or may not contain html control characters (''
, '', etc) - if it does contain them, I would like them to be converted to
their 'safe' representations, such as 'lt;' so that they display and don't
alter the html . Is there a way to do this built into velocity? My initial
thought was to create my own tool and use something like Spring's
HtmlUtils.htmlEscape(...), but I don't want to re-invent the wheel if it is
already possible. As a side note, performance is critical; This method will
theoretically be called on text on our main search results page, which has a
huge number of hits daily, and I want to put as little additional strain on
our application servers as possible.
Any feedback is appreciated.
--
Peter Locke
Senior Engineer / Dev Lead
www.abebooks.com http://www.abebooks.com/
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Re: [OT] JSF and Velocity
Matthias, do you really see the need for JSF/Velocity support with the availability of facelets? I know you took a look at it a few days ago. I'm a long-time user of Velocity, and I'd been waiting for a Velocity rendering kit for some time, but I think facelets is a better fit with JSF, and provides all the same benefits. (The Velocity YMTD article could equally be applied to facelets). -Mike On 7/18/05, Nathan Bubna [EMAIL PROTECTED] wrote: cool! i've long been told and known that you could integrate Velocity into JSF for rendering. it's nice to see someone actually dig in and try it out. :) this sort of thing (if further developed) would probably make me much happier about the possibility of moving to JSF and building components with it. JSF seems to be gaining momentum. it'd be nice to transfer some of my velocity work/skills to that arena. On 7/7/05, Matthias Wessendorf [EMAIL PROTECTED] wrote: Hi guys, just a short link. Yesterday I played with a first (plain) version of a velocity based renderer for JSF UI Components. With renderers like that you are very flexible in changing the *rendering behaivor* of the ui components. see here: http://people.apache.org/~matzew/jsfvelocity.html I'll look deeper into the stuff soon ... ;) Best regards, Matthias - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: handling -ve currency in $number.format('currency',$myNumber) in velocity templates
Kailash Sethy [EMAIL PROTECTED] wrote:
Hi Mike,
If I use the $number.format('currency',$myNumber) for a -ve number,
the output becomes ($number)
$myNumber - -13.55
$number.format('currency',$myNumber)- ( $13.55)
How to show with -ve sign without parenthesis bracket after
formatting?
Your best bet is to ask on the velocity-user@jakarta.apache.org mailing
list, to which I've cc'd this message.
Internally, NumberTool just references NumberFormat:
http://java.sun.com/j2se/1.4.2/docs/api/java/text/NumberFormat.html
You can also cheat and treat the result of
$number.getNumberFormat('number', $number.getLocale())) as a
DecimalFormat, although this may fail for releases other than Velocity 1.3.1
and Velocity Tools 1.1.
#macro (formattedCpac $value $valueIfEmpty)
#set ($cpacFormatter = $number.getNumberFormat('number',
$number.getLocale()))##
${cpacFormatter.setMinimumFractionDigits(5)}##
${cpacFormatter.setMaximumFractionDigits(5)}##
#if($value)${cpacFormatter.format($value)}#else${valueIfEmpty}#end#end
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Re: [vel-tools] LinkTool and Oracle Application Server
Thanks, Shinobu. On 4/15/05, Shinobu Kawai [EMAIL PROTECTED] wrote: Your browser's cookie support might be off. See Servlet Spec SRV.7.1.3 URL Rewriting. Right, I've already read that. However, this is a customer's browser, and it tends to happen in the middle of a session. It seems unlikely (but not impossible) that they turned off cookies at that point. I'm not sure about this one. It shouldn't affect the servlet behaviour. Maybe an OAS problem? ## I've had troubles with OAS in the past, too. Like sessions not supported... Yeah, I'm starting to wonder if OAS uses URL?parameters;jsessionid= rather than URL;jsessionid=?parameters. Unfortunately the Servlet Spec is silent on the ordering when it includes parameters. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[vel-tools] LinkTool and Oracle Application Server
Every once in a great while, I end up with LinkTool generating a URL like /myApp/ViewBillForAccount.do;jsessionid=0afefe11ce615ccf0fdd87a74668c2c9ab6bc8595b0.nk9Dp6Lvr70LnMTBrAjv- AbJphCNaN0Mcybtah0IaxiO- x8Pb2SLbMTyc315wnhaInAjymxbwmhqRcgSHc30Ka2bzmAzGp65Kq35B- AjwokLGml1KakqInRnbmgTxpQOxax4Lax8MbN0Q8Oexfk9Kq2bynknqrkLOlQzNp65In0__?account=0 instead of /myApp/ViewBillForAccount.do?account=0 which causes this code String anAccountIndexValueString = (String)request.getParameter(account); to return null instead of 0. Has anyone else seen this behavior? Thanks, -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to convert string in int
tarun Narang [EMAIL PROTECTED] wrote: Can anyone tell me that how the string can be converted into int in VTL I am recieving the value in count variable through getRequest but this variable has a string value and i have to add some int value in this count variable like $count + 5. #set ($count = $!data.getRequest().getParameter(countRow)) It's only necessary to ask a question once, by the way. I'd perform this conversion using the NumberTool. ie, once you have $numberTool installed in your context, $numberTool.toNumber($count) -- The result of this operation will be of class Number http://jakarta.apache.org/velocity/tools/generic/ http://jakarta.apache.org/velocity/tools/javadoc/org/apache/velocity/tools/generic/NumberTool.html Note that tools like NumberTool are just plain old java objects, and you can put them into your context in many ways, the easiest of which is. context.put(numberTool, new org.apache.velocity.tools.generic.NumberTool()); -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: reading an array's length?
Christofer 'boz' Jennings [EMAIL PROTECTED] wrote: Is there a binary for ArrayTool somewhere or do I just build it? And how would it get configured programmatically (eg. velocity.setProperty())? It's included with the latest (cvs) Velocity tools, I think. It's also available on the Velocity Wiki. http://wiki.apache.org/jakarta-velocity/ArrayTool It's easy enough to just add it to your project as another java file (that's what I'd do). To use it, either configure it via toolbox.xml (if you're using that) or just do a velocityContext.put(arrayTool, new ArrayTool()); - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: reading an array's length?
Christofer 'boz' Jennings [EMAIL PROTECTED] wrote: Ahh. Now I get tools So simple :-) Yeah, that's exactly how I felt. It just took me a lot longer to figure it out. Wonderfully brilliant yet simple idea once you realize that there's nothing special about a tool. :) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: XSLT + Velocity
Gopalakrishnan T [EMAIL PROTECTED] wrote: Is it possible to create dynamic Velocity pages using XSLT + XML combination We are creating Velcoity pages dynamically by getting the form fields(Textbox,Combobox etc.) from a XML file. Is it possible to have a XSLT file for each velocity page and create the form fields dynamically on the fly. Velocity is a server-side technology. You can do whatever you like with the data generated by Velocity once it's on the client side. You can use Velocity to generate html, frames, javascript, XForms, xml, stylesheets, whatever. If that's what you're talking about, then the questions you're asking are not directly relevant to Velocity, but are instead questions about using your web application framework properly to organize things, whatever web app framework that may be. Now if you're talking about transforming xml data into Velocity templates, my question would be Why? Why not just transform those xml templates directly into your final output (html, etc)? Does it really make sense to transform a template (xslt) into another template (velocity), then translate that template into your final output (html)? What are you hoping to gain? [Note that my experience with XSLT is extremely limited, so maybe I'm attributing more power to it than it actually has.] -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: velocity tools init
Charles N. Harvey III [EMAIL PROTECTED] wrote: Quick question about some of the Velocity Tools. How come the Struts Tools and View Tools implement ViewTool and have an init() method but the generic tools do not? How do they actually get initialized? Do I have to just do new DateTool() and it works? It seems like it, but I just wanted to double check. Yep. Tools are plain old java objects. The view tools have to be init'd because they need to be set up with references to the servlet. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Extra space appearing in the if /else block
Gagan 007 [EMAIL PROTECTED] wrote: #if ($obj.isPreviousEmployee())Yes #else NO if the value of isPreviousEmployee() is true then it works ok(it displays Yes) if the values of isPreviousEmployee is false then is displays NO (extra space before NO Appears) as there is a space between #else and NO (we cannot write #elseNO in the template) #if ($obj.isPreviousEmployee())Yes#else#**#NO #* this is a velocity inline comment, good for removing spaces after #directives *# ## this is a velocity to-end-of-line comment, good for removing newlines - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Escaping in VTL (was Re: Velocity JSP Generation)
Will Glass-Husain [EMAIL PROTECTED] wrote:
Doesn't quite work that easily.
The problem is that if #directive is not an actual macro, than
\#directive
is shown verbatim. You only should escape when the same code is legit in
both the source and the generated Velocity. This can be a little
confusing.
Now, see, that's exactly the kind of garbage I avoid. I see now I left off
another rule that I follow.
- Always perform escaping with variable replace (preferrably EscapeTool).
Ie, ${esc.hash} or ${poundSign} and not \#
-Mike
- Original Message -
From: Mike Kienenberger [EMAIL PROTECTED]
To: Shinobu Kawai [EMAIL PROTECTED]; Velocity Users List
velocity-user@jakarta.apache.org
Cc: Velocity Users List velocity-user@jakarta.apache.org
Sent: Thursday, February 24, 2005 7:07 PM
Subject: Re: Escaping in VTL (was Re: Velocity JSP Generation)
Shinobu Kawai [EMAIL PROTECTED] wrote:
Escaping the VTL properly was a little challenging, but otherwise it
was
no
big deal.
I still don't get the whole escaping scheme, partly because I can't
find any documentation that is completely correct. We might want a
document totally devoted to escaping in VTL. :(
Escape all [$], [#], [], [!] and [']. (actually, ! might be overkill,
but
better safe than sorry.) Just use your tool :)
Always use formal notation ${x}
That's always worked for me, and never surprises me.
-Mike
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Re: Velocity JSP Generation
Florin Vancea [EMAIL PROTECTED] wrote: But really, what if (only what if) one would provide the Struts validator and config files (which are info-rich-enough), along with the *.properties containing messages, and at the startup of the WAR (or even at build time) Velocity would generate a set of Velocity templates for all required pages (maybe even Action classes). I take a Cayenne database model, run it through Velocity and create a combination of nine struts-config files, validator xml files, java actions, and velocity templates for generating reports on database entities and creating/editing database entities. Cayenne takes the same database model, runs it through velocity and creates database layer objects. I just give my ant task a database table entity and out comes a report component and editing tool. The only thing I might do afterward is swap a few fields on the html.vm template to organize the form differently. That and update my main struts-config.xml file to include all of the new pieces. So it's certainly doable. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Escaping in VTL (was Re: Velocity JSP Generation)
Shinobu Kawai [EMAIL PROTECTED] wrote:
Escaping the VTL properly was a little challenging, but otherwise it was
no
big deal.
I still don't get the whole escaping scheme, partly because I can't
find any documentation that is completely correct. We might want a
document totally devoted to escaping in VTL. :(
Escape all [$], [#], [], [!] and [']. (actually, ! might be overkill, but
better safe than sorry.) Just use your tool :)
Always use formal notation ${x}
That's always worked for me, and never surprises me.
-Mike
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Re: VelocityViewServlet Differences with VelocityServlet
Steve O'Hara [EMAIL PROTECTED] wrote:
I was invalidating the session when the user sends a logout request. It's
a
bit belt and braces but it insures that the session is destroyed and gets
the user back to known state i.e. as though they were first visiting the
site.
I've been doing the same thing with Velocity 1.3.1 and Struts 1.1 for more
than a year, and I haven't had this problem.
My logout vm file doesn't have any unresolvable references or references
that would cause it to need to search the session or servlet context.
Steve, my suggestion is also to clean up your template (either by removing
those references from the template, or copying your servlet context
attributes into your request attributes in your logout action), or fix the
code in ChainedContext.getAttribute() to skip over invalidated sessions. I
don't think there's a lot of benefit to creating a more convoluted
workaround that still fails to read attributes from the servlet context when
it's easy enough to fix the problem directly in Velocity Tools.
Unfortunately, the morons who came up with the HttpSession interface didn't
bother to provide an isInvalidated() method.
I've been hit by this problem before when iterating through sessions, and
the best you can do is this:
try
{
o = session.getAttribute(key);
}
catch (IllegalStateException e)
{
// Handle invalidated session state
// o = null; // only here to show how it's
handled -- should already be
null
}
Sorry, Nathan, but that's really the only option for dealing with
invalidated sessions. You can at least localize the error trapping to the
one line, though. [And that's the patch -- replace line 194 in
org.apache.velocity.tools.view.context.ChainedContext.java,v 1.6 from
VelTools 1.1 final]
-Mike
-Original Message-
From: Nathan Bubna [mailto:[EMAIL PROTECTED]
Sent: 11 February 2005 01:18
To: [EMAIL PROTECTED]
Cc: Velocity Users List
Subject: Re: VelocityViewServlet Differences with VelocityServlet
On Fri, 11 Feb 2005 01:09:10 -, Steve O'Hara
[EMAIL PROTECTED] wrote:
Hi Nate,
Thanks for your explanation, it makes sense, but it does raise a couple
of
questions.
a) It sounds as though the search for any Velocity variables that are
not
defined in a template will cause this error i.e. #if ($blahblah). Surely
this is a problem in most apps where they are checking for the existence
of
a variable?
no. this is only a problem when a invalidated session object exists
and Velocity is looking for an undefined variable (or one defined only
in the servlet context attributes). most of the time in most apps,
the session object either doesn't exist or is still valid. otherwise,
this would have popped up long ago. :)
b) Your explanation points to a performance degradation over the
original
VelocityServlet - is this, or could it be, significant?
doubtful. when it comes to finding reference values, the only
degradation in direct comparison to the VelocityServlet should be when
looking for references that are undefined. if the app is designed
ideally, this should rarely happen, and even when it does, the extra
cost of looking up values further down the chain is quite negligible
in comparison to the rest of what's happening during the processing of
a servlet request and rendering of a template.
I've coded round the problem by only invalidating the session in the
requestCleanup method.
so you're doing the session invalidation during the processing of the
view? hmm. ok, if that works best for you, but just so you know,
that's not very MVC. :) and out of curiousity, where were you doing
that before?
Steve
-Original Message-
From: Nathan Bubna [mailto:[EMAIL PROTECTED]
Sent: 10 February 2005 18:56
To: [EMAIL PROTECTED]
Subject: Re: VelocityViewServlet Differences with VelocityServlet
the quick answer to your question (re: differences between the
servlets) is that the VelocityViewServlet uses a chained context. the
ChainedContext looks for references in the toolbox, current (normal)
context, request attributes, session attributes, and servlet context
attributes. when looking for a reference in a template, it searches
those in that order until the matching key is found.
so the problem is, that in the template being rendered at the end of
the request which is invalidating the session, there is a reference
within the block of an #if statement that is not being found in the
toolbox, normal context, or request attributes. so, the
ChainedContext being used by the VelocityViewServlet continues on to
check the session attributes for that reference. of course, it's
smart enough to make sure the session isn't null before trying that,
but it doesn't have a way to check if the session is valid or not.
so,
Re: Immutable pojos as context objects
Serge Knystautas [EMAIL PROTECTED] wrote: I was wondering if there is a convenient way to restrict method calls on objects I put into VelocityContext. I use Velocity templates to do dynamic renders high-traffic websites, and I instantiate VelocityEngine objects along with various POJOs that Spring assembles. These POJOs are sort of like macros and/or scripting support, have been configured with setter-injection, and are exposed to templates using a VelocityContext object. My problem is that I intend to reuse these VelocityEngine and POJOs across multiple requests, so I do not want to allow template authors to call setter methods and effectively reconfigure the POJOs. Is there an easy way to either have Velocity prevent certain method calls on context objects, Well, the easy answer to this part of the question is to implement a custom Uberspect. http://jakarta.apache.org/velocity/api/org/apache/velocity/util/introspection/Uberspect.html There's examples of this on the wiki: http://wiki.apache.org/jakarta-velocity/MultiUberspect http://wiki.apache.org/jakarta-velocity/LuceneDocumentUberspect or otherwise a way to make these POJOs immutable? Outside of the scope of velocity, but really the heart of the problem even with a custom Uberspect. At some point you either need to enumerate all objects you want to be immutable (or mutable), or you need to only stick immutable objects into the context. Personally, I think the second method is easier and safer. Why don't you stick your POJOs into the template as a wrapper object (delegate), with only the getter methods exposed? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Immutable pojos as context objects
Serge Knystautas [EMAIL PROTECTED] wrote: Mike Kienenberger wrote: Well, the easy answer to this part of the question is to implement a custom Uberspect. http://jakarta.apache.org/velocity/api/org/apache/velocity/util/introspection/Uberspect.html There's examples of this on the wiki: http://wiki.apache.org/jakarta-velocity/MultiUberspect http://wiki.apache.org/jakarta-velocity/LuceneDocumentUberspect I was looking to extend VelocityContext to add a putImmutable(key, object) method. This would create an AOP-style proxy object that will fail on any set method but otherwise just hand calls to the underlying POJO. Probably something CGLIB could do for me. Yeah, that's something you could do with an Uberspect. Set up something so you can do Uberspect.putImmutable(context, key, object) which will add it to the context, and add it to a list of objects to which you disallow set method calls. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Restrict access to Velocity's capabilities
Ben [EMAIL PROTECTED] wrote:
Hi
I have been using Velocity throughout my site and I am in awe with its
capabilities. However there are situations where I need to restrict
its capabilities to a certain extend.
For example, my site allows users to upload templates and be able to
use a number of predefined variables. What I don't want them to do is
to use Velocity to abuse the system, such as using directives and
writing macros.
Is there a way to create a Velocity instance with directives and other
features disabled? The only thing I need is reference to variables.
The best thing to do is simply escape all # symbols when it's uploaded.
Ie, replace them with $esc.hash or something equivalent.
Personally, I'd go a step further and escape all $ symbols as well, then
manually unescape any instance of ${esc.dollar}allowed_variable_name back to
${allowed_variable_name} where allowed variable name is in a preset list.
-
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Re: Email VM DateTool Usage Problem
John Mahan [EMAIL PROTECTED] wrote:
I would appreciate some insight into how one tells the Velociy instance to
import java.util.date and/or the DateTool.
I'm using the following Velocity code that works OK in my main instance
but
will not render in the Email instance:
$date.format('E, d ',$!FormatItem.newDate)
The easiest way is to use:
context.put(date, new DateTool());
Another way is to use Edgar Poce's standalone toolbox loader posted to the
velocity-dev list (search or browse the velocity mail archives) or write
your own toolbox loader:
Date: Fri, 10 Dec 2004 18:13:07 -0300
From: Edgar Poce [EMAIL PROTECTED]
Subject: Re: standalone toolbox loader
To: Velocity Developers List velocity-dev@jakarta.apache.org
Reply-to: Velocity Developers List velocity-dev@jakarta.apache.org
Message-id: [EMAIL PROTECTED]
-
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Re: Email VM DateTool Usage Problem
John Mahan [EMAIL PROTECTED] wrote: I'm using a standalone class to instantiate a Velocity engine that allows context.puts() into Velocity templates to format Email content.. which works OK except the DateTool does not format dates. I suspect this is caused because I'm not properly importing the DateTool or setting the right Velocity properties when the Email Velocity instance is invoked. I don't know of anything you've mentioned that would stop it from working. DateTool is a plain old java object. Perhaps you could post the relevent java code for setting up the context and the velocity code where you're using the DateTool. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Usage question.
Andrew Wilson [EMAIL PROTECTED] wrote:
Id like to include the following code in my Velocity Template:
${request.getProperty(Request.ID)}
Unfortunately, this doesn't compile.
Is there a clever way I can do this with a Macro?
Since request is an instance of Request I would also be happy with
${request.getProperty(${request.ID})}
If Request.ID is a literal, put it in quotes.
If it's not a literal, you'll have to provide us with more information.
-Mike
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Re: Chop output...
Dimitrios Kolovos [EMAIL PROTECTED] wrote: When iterating a collection/array it is usual that you add something after each iteration except for the last. #foreach ($i in [1..10])$i,#end produces 1,2,3..10, The only way I know in which I can omit the last comma is to use velocityount. Nevertheless, I think it would be more elegant if there was a variable (e.g. $output) in the context that represented the so far produced text. Most of us just use an #if statement and only output the comma on non-first elements. Here's one way to do it off the top of my head -- could be syntax errors. Some of the ##s are probably overkill, but better safe than sorry. Or you could cram it all on one line. #set( $tempFirstOne = true )## #foreach ($i in [1..10])## #if ($tempFirstOne = true)## #set( $tempFirstOne = false )## #else## not $tempFirstOne ,## #end###if ($tempFirstOne = true) $i## #end##foreach ($i in [1..10]) -Mike And as long as we're talking about #foreach#else#end, how about #onFirst? #onLast? #onEmpty? :-) Not unreasonable in a templating language, and definitely more readable than the above. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Question on using text from resource bundles
Chris Bailey [EMAIL PROTECTED] wrote: I¹m relatively new to Velocity and have one issue I¹m trying to find out more info on. I¹m using Velocity for a web app, and one that will be localized in many languages. So, for my web pages (which are all done via Velocity), I¹d like to retrieve text via a resource bundle, and further, to have some of the abilities provided by MessageFormat. Essentially, I¹m looking for something similar to the ³fmt² JSTL tags (³fmt:message² and its subtag ³fmt:param²). Or, a better question might be, what would the ³best practices² be for Velocity in this regard? How are people doing this type of thing when using Velocity? It seems reasonable to put this in your view/Velocity markup, as it¹s view/presentation specific, but I haven¹t been able to find any information on this kind of thing. I use Struts and velocity. Struts contains a MessageResource class to handle this, and Velocity makes it available via the Struts tools. I believe that the MessageResource classes have now been made into a separate Apache Commons MessageResources class, and that might be something for you to look into. Or you could just write your own custom velocity tool (perhaps using the struts one as a basis) if that's not a good fit. A velocity tool is just a java class that's stuck into the Velocity context so you can call methods on it. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Context availability during method invocation / ReferenceInsertionEventHandler
Vincent van Beveren [EMAIL PROTECTED] wrote: I would like to simplify the following piece Velocity code: $locale = ... user defined locale ... // this is done while setting up the context Description: $product.description.toString($locale) Title: $product.title.toString($locale) In which the class product has a method 'getDescription' which returens a home-made object of the class LocaleData. LocaleData is basically a map with as key a locale and as value an object, usually a string. Somewhat like a ResourceBundle (but not quite) The simplified version would be like this. $locale = ... user defined locale ...// this is done while setting up the context Description: $product.description Title: $product.title Anyone has any idea how to accompish automatic parsing of localized data? What about setting up a localizer velocity tool helper class that handles this for you? ] $localizer = ... helper tool with user defined locale ...// this is done while setting up the context ] ] Description: $localizer.get($product.description) ] Title: $localizer.get($product.title) Or if you wanted to get the localization completely out of the template, use ] Description: $product.localeDescription ] Title: $product.localeTitle and have those two methods directly call the localizer helper class. Note that this is actually a question about the use of velocity and not the development of velocity, so I've changed the destination mailing list from velocity-dev@jakarta.apache.org to velocity-user@jakarta.apache.org -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[Vel-Tools] Converting a long return type into a formatted Date
I'm trying to figure out how to convert File.lastModified (type long) into a formatted date in Velocity. It appears that I need to use DateTool.toDate(Long obj) to go from a long value to a Date. However, neither NumberTool nor MathTool provides a method to convert a long to a Long. I can convert it to an Integer with MathTool.toInteger(). Or MathTool.toNumber() and -- if the number is large enough -- it'll force it to be a Long, but it's not guaranteed. Perhaps DateTool should be modified to handle toDate(Number obj). Or MathTool modified to provide toLong(), toFloat(), etc. Or both. Hopefully, I'm overlooking something obvious, which is why I posted to user and not dev. Thanks, -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [Vel-Tools] Converting a long return type into a formatted Date
Nathan Bubna [EMAIL PROTECTED] wrote: in VTL, long and Long are the same. have you tried just using DateTool.toDate(Long) with the long? Just tried it, and it works fine. I didn't realize that primitive types would convert like that inside nested method calls. I figured (wrongly) that primitive-to-object conversions would only take place on the outer-most call when the value was actually rendered. Thanks! -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: menus, header, footer, etc with velocity
Shinobu Kawai [EMAIL PROTECTED] wrote: I'd like to generate some web pages containing menus, header, footer, etc... Can someone give me some clues (good practices, pointers) to properly organize this with velocity. Take a look at VelocityLayoutServlet and TilesTool. http://jakarta.apache.org/velocity/tools/view/index.html#VelocityLayoutServlet http://jakarta.apache.org/velocity/tools/struts/TilesTool.html I recommend VelocityLayoutServlet over Tiles. Here's a couple of previously-posted examples. (Weird that the one is only available from google cache.) [Google search for velocity kienenberger header footer -- you probably just left off the kienenberger search term :) ] http://www.mail-archive.com/velocity-user@jakarta.apache.org/msg13821.html http://64.233.161.104/search?q=cache:aLlyisxTJzYJ:www.mail- archive.com/velocity- user%40jakarta.apache.org/msg12074.html+velocity+kienenberger+header+footerhl=enclient=firefox- a - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Disable direct acces to vm's when using velocity + struts + tiles
Matt Higgins [EMAIL PROTECTED] wrote: Is it possible to disable direct access to vm files ? When using velocity and tiles, the user never sees the .vm but if you know the correct url you could access /myapp/pages/foo/template.vm This would render a bogus pages as it did not go through the tiles processor or any of my struts actions. I think that anything you put into WEB-INF is no longer directly accessible. My velocity templates are in ./WEB-INF/pages and other such subdirectories. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: adding vm file to existing Struts based Application
Anaparthi Subrahmanyam [EMAIL PROTECTED] wrote:
I have one application based on struts framework.I want to adda velocity
file after few web pages in the application ,which will add few parameters
to the session.
Can anyone help me out the process to do so.
I have just written the html file having form with few pararmeters
renamed
to vm. BUt how to add it to struts framework otherwise i think struts will
not able to read the data.
This is just a matter of setting up a standard struts action form and bean.
There's nothing really velocity-related to the process, unless you get fancy
and pre-populate the form fields. Just make sure you've installed
velocity-tools for doing struts form support.
-Mike
Example HTML.vm code:
==
form method=POST action=$link.setAction('ChangeLoggingLevel')
input type=text name=logLevel
value=$loggingLevelForm.logLevel
size=40 maxlength=128 /
input type=submit name=ChangeLoggingLevelButton
value=Change Logging
Level /
/form
==
Example struts-config.xml code:
==
form-bean
name=loggingLevelForm
type=org.apache.struts.validator.DynaValidatorForm
form-property
name=logLevel
type=java.lang.String/
/form-bean
action path=/LoggingLevels
type=com.xyz.struts.actions.AdministrativeTasks.InitializeLoggingLevelsAction
scope=request
name=loggingLevelForm
validate=false
forward name=Success
path=/vm/LoggingLevels.do/
/action
action path=/ChangeLoggingLevel
type=com.xyz.struts.actions.AdministrativeTasks.ChangeLoggingLevelAction
scope=request
name=loggingLevelForm
validate=true
input=/vm/LoggingLevels.do
forward name=Success path=/LoggingLevels.do/
forward name=Failure path=/vm/LoggingLevels.do/
/action
==
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Editing wiki pages [was: Re: unwanted whitespace]
Rob Butler [EMAIL PROTECTED] wrote: I tried to edit the page you suggested, but it said I am not allowed to edit that page, and the bottom of the page says Immutable page. Do I need to login or something? Click on UserPreferences in the top upper-right corner. Once you've created an account, you'll be able to edit pages. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
EscapeTool (and velocity-tool best practices)
I started using EscapeTool today (since it was far more comprehensive that my primitive and misnamed URLEncoder tool), and noticed that it only took String arguments. So if I had did $esc.html($value) and value wasn't a String, I got '$esc.html($value)' returned as a literal. In general, should Velocity tools that operate on a String operate on an Object instead and perform a object.toString() conversion first? Or at least provide Object argument wrapper methods to call the String argument methods? Obviously, I can easily subclass EscapeTool even if no one else agrees with me and add public String html(Object object)-like methods, but I'm curious what we consider to be best-practices -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: EscapeTool (and velocity-tool best practices)
Shinobu Kawai [EMAIL PROTECTED] wrote: Just be sure to check for null. Too late! I didn't, and already got caught by that error and subsequently corrected it. :) Overloading in Tools currently gives strange behaviour. I haven't run into this problem. Maybe it's because the methods are in two separate classes. When you update your class, you could avoid the problem by only having Object argument methods. The overhead of calling String.toString() should be minimal :) -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Velocity tools
What's the best practice for adding a Velocity Tool to the context in a standalone app? is it manually with something like context.put(tool, new *Tool()) or there's a configuration setting I'm missing? Shinobu Kawai [EMAIL PROTECTED] wrote: I guess that's the normal method. Or, you can use the toolbox strategy like VelocityViewServlet and DVSL. ## It's not built into Velocity, so you'll have to implement if yourself, though. If you came up with a standalone toolbox loader using the same format as toolbox.xml and posted it, it might end up in the next version of velocity tools :) XMLToolboxManager probably does most if not all of what you need already. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tiles definitions without tiles-defs.xml
Anthony E. Carlos [EMAIL PROTECTED] wrote: Thanks so much for the response. I'll look into how Tiles works on the jsp side and see if it can be duplicated in Velocity. I consider myself an intermediate level guy, so I don't know if my patches would be worth anything. The problem I'm trying to overcome is that I have content creators (not web programmers) who need to be able to create pages. I'd like them to use Tiles because I'm (I'm the programmer) using Tiles and if I update a Tile, it would be great for the whole site to be updated. The problem is that I want to avoid having content creators touch tiles-defs.xml or struts-config.xml, or have to reload/restart Tomcat. In Struts in Action, page 329, Husted writes that the body-wrap deployment for Tiles is appropriate to avoid creating an extra tile. His example uses insert and put tags to create the definition on the fly. Since this doesn't currently work with Velocity, I'm using Velocity's #parse() directive to simulate some of the tiles stuff. It's a little bit messy, but I think it will work. Have you considered just using the VelocityLayoutServlet and dumping tiles? I started my project a year ago using Tiles, but quickly switched over to using VelocityLayoutServlet and haven't regretted it. Our web designer has been able to easily do everything he wants with VLS. I'd be curious to know what functionality you'd lose by doing this. We use something that boils down to the following as our layout template, html head /head body #parse($header) #parse($leftSideMenu) #parse($body) #parse($footer) /body html We use a version of Ted Husted's ViewAction class which just takes struts parameters and puts them into the velocity context (very trivial class). I can't remember if it's included (or just mentioned) in Struts In Action, but I can put it up on the Wiki if it's not already there. I do let my web designer manage a struts-config-presentation.xml file, but he only makes minor changes in it. An example entry is as follows. He generally just updates the title parts. Anything that's not specifically defined uses the global defaults specified at the top of the config file. action path=/vm/Logout type=us_ok_deq_wqdata.http.ViewAction validate=false parameter=IsExternal;ShouldShowReturnToLastPageLink;Title;leftSideMenu;loginPanel;header;body;footer;bartitle forward name=Title path=Logged out GV E-Bill / forward name=bartitle path=Logged out GV E-Bill / forward name=body path=/WEB-INF/pages/Logout.vm / /action -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [FAQ] How do you check for null?
Shinobu Kawai [EMAIL PROTECTED] wrote: Problem: I want to check for null, something like this: #if ($car.fuel == null) Approach 1: Use the fact that null is evaluated as a false conditional. cf. http://jakarta.apache.org/velocity/user-guide.html#Conditionals #if( ! $car.fuel ) Note : The conditional will also pass if the result of $car.fuel is the boolean false. What this approach is actually checking is whether the reference is null or false. Approach 2: Use the fact that null is quiet references. cf. http://jakarta.apache.org/velocity/user-guide.html#Quiet%20Reference%20Notation #if( $!car.fuel == ) Note : The conditional will also pass if the result of $car.fuel is a blank String. What this approach is actually checking is whether the reference is null or blank. BTW, just checking for blank can be achieved by: #if( $car.fuel == ) So you really either need to use the tool or do this: #if ((! $car.fuel) ($!car.fuel == )) -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [FAQ] How do you check for null?
Simon Christian [EMAIL PROTECTED] wrote: Mike Kienenberger wrote: So you really either need to use the tool or do this: #if ((! $car.fuel) ($!car.fuel == )) -Mike No the first bit isn't necessary, just #if( $!car.fuel == ) covers the eventualities when testing for null. That's not true. car.fuel = is not the same as car.fuel = null, yet both pass the condition. Unless the template designer knows the underlying type of the java object, the only safe solution is to check for (null or false) and (null or empty-string) = if true, must be null. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: XML and velocity
Subbiah Raman [EMAIL PROTECTED] wrote:
I am trying to use a SAX parser in Velocity context and I need to do the
following
#set($temp = $root.getRootElement().getChild(email).getText() )
But it throws
org.apache.velocity.exception.ParseErrorException: Encountered email
In addition to what others have said, you can also use single-quotes inside
your double-quotes.
#set($temp = $root.getRootElement().getChild('email').getText() )
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Re: vm to return a binary file
Ilan Azbel [EMAIL PROTECTED] wrote: I would like a vm to return a binary file and thereby instruct the browser not to display it, but rather to download it. That is, ask the user if they would like to Open or Save the file. I would like to do this without any redirecting statements - so as soon as a user requests a certain .vm file, the corresponding java creates some type of binary data, and the browser immediately asks whether to open or save this data. Ilan, Both your requests to create a csv and a binary file for download are generally outside of the scope of velocity servlets. You'd generally do this using a different servlet. What servlet framework are you using? For example, in struts, you'd do something like this in an action to create a pdf file to download. To create another file type (cvs, binary), you'd simply change the content type and provide a different file generator. response.setContentType(application/pdf); ByteArrayOutputStream memoryOutputStream = new ByteArrayOutputStream(); BillPdfer billPdfer = new BillPdfer(selectedBill, memoryOutputStream); billPdfer.writeBillPdf (); response.setContentLength(memoryOutputStream.size()); ServletOutputStream out = response.getOutputStream(); memoryOutputStream.writeTo(out); out.flush(); return null; You could still use Velocity to create your csv, but you'd do it directly with Velocity.mergeTemplate rather than via a servlet. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: vm to return a binary file
Ilan Azbel [EMAIL PROTECTED] wrote: I am using the Turbine framework. The thing is, I want to leverage off the existing database connections that turbine has already made, so I don't want to create something completely independant. How do I go about doing this? I don't know enough about turbine to say, but if there's separation between the presentation layer and control layer, there must be a way to manually construct a response. In struts, that's done by returning null from an action (indicating that you've already built a response object and to not generate a forward). You might have better chances of getting an answer on the turbine mailing list as this is really a turbine question and not a velocity one. In any case, the code below should be of some help. It shows what values you need to set on a response object and how to write your output into it. That should be pretty much the same for any servlet framework. -Mike -Original Message- From: Mike Kienenberger [mailto:[EMAIL PROTECTED] Sent: 25 November 2004 03:43 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Re: vm to return a binary file Ilan Azbel [EMAIL PROTECTED] wrote: I would like a vm to return a binary file and thereby instruct the browser not to display it, but rather to download it. That is, ask the user if they would like to Open or Save the file. I would like to do this without any redirecting statements - so as soon as a user requests a certain .vm file, the corresponding java creates some type of binary data, and the browser immediately asks whether to open or save this data. Ilan, Both your requests to create a csv and a binary file for download are generally outside of the scope of velocity servlets. You'd generally do this using a different servlet. What servlet framework are you using? For example, in struts, you'd do something like this in an action to create a pdf file to download. To create another file type (cvs, binary), you'd simply change the content type and provide a different file generator. response.setContentType(application/pdf); ByteArrayOutputStream memoryOutputStream = new ByteArrayOutputStream(); BillPdfer billPdfer = new BillPdfer(selectedBill, memoryOutputStream); billPdfer.writeBillPdf (); response.setContentLength(memoryOutputStream.size()); ServletOutputStream out = response.getOutputStream(); memoryOutputStream.writeTo(out); out.flush(); return null; You could still use Velocity to create your csv, but you'd do it directly with Velocity.mergeTemplate rather than via a servlet. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.801 / Virus Database: 544 - Release Date: 2004/11/24 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Errors Building Velocity1.4 with J2EE
Torsten Schmidt [EMAIL PROTECTED] wrote: I want to get my Templates directly from a Database so i must rebuild the Velocity Source with the Build Target jar-J2EE. I installed Ant correctly and tryed to build the Velocity jar with JDK1.4 and other versions. The j2ee.jar is in the correct directory but i became 2 Errors which are like this: ..VelocityServlet.MockServletContext is not abstract and does not override abstract mehtod getResourcePaths(java.lang.String) in javax.servlet.ServletContext ... i became a Note: Recompile with -deprecation but this did'nt work. I can't help with this error, but I'm surprised that you need to rebuild velocity to read templates from a database. You should be able to do what you need to do either via subclassing or by using a custom resource loaders. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Localized data: best practice - insights appreciated
Vincent van Beveren [EMAIL PROTECTED] wrote: Ofcourse I could also build a tool, like the 'localeTool' and do the following: $localeTool.getMessage($product.title) where $product.title would return some object that contains a string for each locale, and LocaleTool would know how to extract the right string from the bunch. But I find this rather verbose, and it makes the code ugly. $msg.get($product.title) isn't all that verbose, to use the struts version. Unless you're going to build localization into every single object, you're going to need something of that form anyway -- A key that says what you want to localize, and a tool to do the localization. In my case information is loaded from a database. That's just a hidden implementation detail, and not really part of the problem definition. I also load my info from a database, but it looks the same in velocity. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Referencing arrays
Steve O'Hara [EMAIL PROTECTED] wrote: I'm trying to reference a 2 dimensional array of strings using the following td valign=top$Results[0][$velocityCount]/td Unfortunately I just get [[Ljava.lang.String;@1684e26[0][x] where x is the $velocityCount. Array notation is not part of the Velocity Template Language. You can download Shinobu Kawai's ArrayTool to add support for arrays, or you can create your own custom tool. http://wiki.apache.org/jakarta-velocity/ArrayTool I played around with ArrayTool earlier today, and it seems to work fine. $array.get($array.get($Results, 0), $velocityCount) -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Velocity DateTool Coding Examples
John Reynolds [EMAIL PROTECTED] wrote:
What I can_t crack is how to use the Date tool IN THE TEMPLATE to format
the string. Any help is appreciated.
Here's one example in macro format (assumes your DateTool is named date):
#macro (formattedDateTime $dateValue)${date.format(h:mm a M d,
(zzz), $dateValue)}#end
Or by itself
${date.format(h:mm a M d, (zzz), $birthday.birthdate)}
-
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Re: Velocity DateTool Coding Examples
John Reynolds [EMAIL PROTECTED] wrote: Hi Mike, thanks for the quick reply! Here is where i think all those beers from college are taking a toll =) == assumes your DateTool is named date == Can in instantiate the tool from within the template? right now i am not putting the tool into the velocity context in my action servlet. You'll probably be better off keeping the discussion on the list. I've been known to give people mis-advice that has to be corrected by others :) No, you have to pre-add tools to the context. You can either do this in code (add it just like any other velocity context attribute -- nothing special about a tool, it's just a java object assigned to an attribute) or you can configure it via web.xml. You can probably also stick into a session/request/application level attribute if you had to, but that's out of my experience. If you're using web.xml, it'd be something like this: !-- Define Velocity template compiler -- servlet servlet-namevelocity/servlet-name servlet-class org.apache.velocity.tools.view.servlet.VelocityLayoutServlet /servlet-class init-param param-nameorg.apache.velocity.toolbox/param-name param-value/WEB-INF/toolbox.xml/param-value /init-param init-param param-nameorg.apache.velocity.properties/param-name param-value/WEB-INF/velocity.properties/param-value /init-param load-on-startup10/load-on-startup /servlet Toolbox.xml looks something like this ?xml version=1.0? toolbox tool keydate/key scopeapplication/scope classorg.apache.velocity.tools.generic.DateTool/class /tool /toolbox - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: #set $var = (boolean exp) == $var = null
Shinobu Kawai [EMAIL PROTECTED] wrote: Well, here's what you /can/ do using 1.3: #set ($listIsEmpty = $list.empty) #if ($listIsEmpty) no elements! #else first element : $list.get(0) #end It looks like it's the expression that Velocity doesn't like, and not the Boolean. (It didn't work for ... = !$list.empty) Thanks for looking into it. Fortunately, out of my hundreds of templates, I only used that construct once, and it was trivial to place it directly in the #if statement. I never thought to check $list.empty, but that's a variable assignment, not a velocity boolean expression. Probably the best news is that it's fixed in 1.4. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Formatting price, decimals etc...
Manish Hatwalne [EMAIL PROTECTED] wrote: How can I format price, decimals etc in VTL? You'll probably need to use NumberTool. http://jakarta.apache.org/velocity/tools/generic/ http://jakarta.apache.org/velocity/tools/javadoc/org/apache/velocity/tools/generic/NumberTool.html - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
#set $var = (boolean exp) == $var = null
I suppose in retrospect since Velocity is String-oriented, this behavior is to be expected, but it sure seems counter-intuitive that #set ($listHasElements = ($list.size() 0)) #if ($listHasElements) for lists containing elements does not work, but #if ($list.size() 0) does. Maybe my pointing this out will save someone else some pain. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: #set $var = (boolean exp) == $var = null
Shinobu Kawai [EMAIL PROTECTED] wrote: Hi Mike, I suppose in retrospect since Velocity is String-oriented, this behavior is to be expected, but it sure seems counter-intuitive that #set ($listHasElements = ($list.size() 0)) #if ($listHasElements) for lists containing elements does not work, but #if ($list.size() 0) does. I wonder why it works in my environment? #set ($listHasElements = ($list.size() 0)) $listHasElements should show $listHasElements, right? But it was true. It worked for both 1.4 and CVS HEAD. Maybe there's something wrong with your $list. Nope, but maybe the behavior changed in 1.4. I'm using 1.3.1. The list definitely exists and has elements. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Conditional display - Approach question
Manish [EMAIL PROTECTED] wrote: (1) Put a conditional check in velocity template while iterating though a list to decide if the book should be displayed. It would be sth like this - #foreach($book in booklist) #if($StockManager.isAvailable($book.number)) ## do whatever here... #end ## don't display anything if book is not available #end (2) Another approach is to check this in VARIOUS actions while creating the list itself if the book should be added to the list at all. First approach sounds easier to implement, but it means that the view part is taking decision about business logic, which sounds not so nice Second approach is difficult because there are many actions that will have to be changed, besides there are many programmers working on various actions, so they all need to take care of that. So I am trying to avoid this However, there's one more advantage here, if I do it this way I can add a unit test to check that only available books are getting added. If you want to be a purist, you probably need to decide if it's business logic or display logic. Is there any chance you'll eventually want to display non-available books? If you decide it's business logic, another option would be to forward everything to a filtering action which then forwards to your display action. The logic would still be separate from the view logic, but you'd have chained them together in your config file. This is probably how I'd do it. p.s. BTW, is there anything similar to Java continue in VTL? If you're talking about #foreach loops, in standard velocity there's nothing. There may-or-may-not be a #stop directive you can install as a patch in the bugzilla database, but I use an #if statement. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Velocity
Wong, RYM (Richard) [EMAIL PROTECTED] wrote: Hi, I cannot find out whether VTL is case sensitive or not in the on-line reference manual. e.g. Are the reference variables $var and $VaR regarded as the same variable? I'm fairly certain they are case sensitive. The easiest and most authoratative way to find out is to just try it, of course :) -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Avoiding Line Breaks in macros
Alexandre Torres [EMAIL PROTECTED] wrote: Hi. It is possible to avoid line break generation when calling a macro? for example: #macro (duh) John #end ... after the joke #daa() said duh. ... This will generate: after the joke John ---line break said duh. I'm trying to generate no HTML content, so, it will be important to control line break and space generation. I took a look in the docs, but can't find much about this. Should I use classes instead of macros (well, macros are much better in my case) I 'm a little bit lost in this line break generation with #comands too, I did search in the past messages but it's hard to find information (or I'm too newbie in velocity). Thanks for any tip. I find whitespace in velocity confusing and somewhat inconsistent. Two general rules are: Whatever line breaks you put in are left in. If a line ends with a #command, the line break is not displayed. So, #macro(duh)John#end is what you want. Your best bet is to play around with stuff until it does what you want it to do. Another useful thing you might need is #**# which is an empty inline comment that you can use to separate other commands and variables. One thing to watch out for is that ending the final line with ## will cause a fatal error. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can we access velocity contexts from inside javascript
Barbara Baughman [EMAIL PROTECTED] wrote: Velocity is rendered on the server side, replacing Velocity code with strings, not any Java or Javascript object. The rendered template is sent to the browser client. When javascript attempts to work on the client side there is no VelocityContext to work with any more. So be sure your rendered code already has the information javascript needs from the Velocity context before sending it to the client. And if you need velocity context data made available to your javascript, then, in your velocity template, you need to generate the javascript code to create that data so the data is available once the web browser receives and interprets the javascript. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: restricting access to velocity templates
Michael Kucera [EMAIL PROTECTED] wrote: Right now if you type something like www.myapp.ca/templates/welcome.vm into the browser the template is rendered for the user but the required data is missing and it looks like a mess. How do I selectively restrict access just to the templates without interfering with the way struts works? Am I missing something simple? Am I totally way off? Any help would be appreciated. Thanks. Move your templates (and anything else you don't want visible via direct access) inside WEB-INF. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: double parsing
Demetz Markus [EMAIL PROTECTED] wrote: hello, i'm very new to velocity i want to do a think like following: my context looks like this: context.put(name1, something), context.put(name2, somethingelse), ... my temlate has a loop: #foreach($record in $list) $name$velocityCount #end the result only is $name1 $name2 but I would like to have the context of $name1 $name2 - something and something else... is this possible? You can do this with the eval method of the RenderTool. http://jakarta.apache.org/velocity/tools/javadoc/org/apache/velocity/tools/generic/RenderTool.html However, you might be better off changing the data struture(s) that you're putting into your context rather than building variables in the template. For example, put the names in a map with the $record as a key, or create a new data struture that contains both record and names and put them in a list, or just put the names in a list. -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Change to allow newlines in directives and + as a string concatenator
Geir Magnusson Jr [EMAIL PROTECTED] wrote: I committed two changes that I think need community review. (Well, the second does). The first is that you can use newlines in directives #foreach($foo in $bar) or #macro( foo $a $b ) etc. The second, which I think we should agree on, is to use '+' as the string concatenation operator, so you can : #set($longstring = this is a long + string that you can do over + multiple lines) Anything that makes Velocity less fragile and more intuitive is a Good Thing in my opinion. Both of these do that. (I had a 20-argument macro all crammed on one line just earlier this week that really could have benefitted from newlines.) -Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
