Writing a delphi cfx custom tag

Coldfusion documentation makes reference to writing cfx tags
using Delphi,
but nowhere can I find a hint on how to do this. Where do I
look?
Jeremy

I figured out the problem mysql.
I have to add "extern "C" __declspec( dllexport )" before my ProcessTagRequest function, but I also tried only "__declspec( dllexport )", which doesn't work.
Can anyone explain why I really need the extern "C" to work? The visual c++ documentation states that compiler does not require "extern "C" " to export function. Why do I need that for coldfusion?
Thanks.

Similar Messages

Error processing CFX custom tag "CFX_iMSMail".

Hi
I am testing a CF application and this is the error I get.,
when I am trying to 'register for a certain event'.
Error processing CFX custom tag "CFX_iMSMail".
'The CFX custom tag "CFX_iMSMail" was not found in the custom
tag database. Please be sure to add custom tags to the database
before using them. If you have added your tag to the database then
you should check the spelling of the tag within your template to
insure that it matches the database entry.'
Text
The following are the lines of code in one of my cf pages
that seem to be responsible for causing the error.
486 : spooldir="#application.mailPath#/Out/"
487 : priority="0"
488 : smtpfrom="#listPart.contactEmail#"
489 : header_from="#Trim(listPart.contactName)#
<#Trim(listPart.contactEmail)#>"
Is there any fix for the CFX custom tag problem or is there
anything I am missing. I am using CF 7.0 on Windows XP
thanks in advance

You must register CFX custom tags in the CF Administrator.
Until you do, they will not be found by the server. That's what the
error message is trying to tell you.

Excel2Query Custom Tag

I am part of a team that admins 3 Windows 2003 web servers
running ColdFusion MX7. Each of the 3 servers has the
CFX_Excel2Query custom tag registered. The tag works without issue
on our production and development, but not on the test server. On
the test server, we receive the message, "The CFX custom tag
"CFX_excel2query" was nt found in the custom tag database. Please
be sure ...."
Additional info:
I registered the tag in the "CFX Tags" Page
I registered the location of the CFX_Excel2Query to the
"Custom Tag Paths" page
Any help would be greatly appreciated.
Thanks,
Tony

Questions:
1. Have you tried the CFSPREADSHEET tag?
http://help.adobe.com/en_US/ColdFusion/9.0/CFMLRef/WSc3ff6d0ea77859461172e0811cbec17cba-7f 87.html
2. Can you post your code?

Custom Tag - Unable to Load Library

I'm working on a project that needs to access custom tags. .
We are using CFMX Version 6,1,0,63958 Edition Enterprise Operating
system Windows 2003 OS version 5.2
The Web application relies on 4 custom tags written in C++. I
can get the first tag to work. The other tags work on my developer
edition (CFMX 7), but I cannot
get them to work on Version 6.1. I get the error "Unable to
Load Library". These other custom tags each call an external DLL
from within side them and I
believe that this is what's causing the problem. I've tried
researching this problem for months, checking the forums, Google,
etc. but nothing has worked.
I have a deadline coming up soon, so any help or advice to
get me in the right direction
to solve this problem would be greatly appreciated. I don't
know what to do and I need a solution!
Thanks

That worked. It was looking for the dll in CFusionMX\Lib
instead of in the CFX\custom tags folder.

Installing java custom tag

I'm trying to install a custom tag written in java
(cfx_ExcelQuery) and am not having any success.
The tag was in a .jar file which I downloaded to the server
and extracted to the /classes subdirectory. The actual .class file
ended up in a subdirectory several levels below.
I registered the tag as ExcelQuery and wrote a test program
to call the tag according to the specs.
I got a CF error indicating the tag didn't exist until I
added the directory path containing the .class file (the exact
subdirectory). Now I get an internal server error instead (progress
I guess).
I have no experience installing/using java custom tags so I
may be missing something that would be obvious to someone else.
If anyone has any ideas please let me know.
Thanks,
Ken

I got this error:
Error processing CFX custom tag CFX_net.sourceforge.openxcf.javacfx.text2query.
The CFX custom tag CFX_net.sourceforge.openxcf.javacfx.text2query was not found in the custom tag database. You must add custom tags to the database before using them. If you have added your tag to the database, check the spelling of the tag within your template to ensure that it matches the database entry.
The error occurred in C:\Inetpub\wwwroot\scratch\DataLoad\checkGradData_NEW_July.cfm: line 191
189 :
190 : <cfx_text2Query
191 : file="#FeedPath##FileName#"
192 : firstRowIsHeader="false"
193 : delimiter="#chr(9)#"

Writing Cookie from Custom Tag

Hi Everyone.
I am attempting to write a cookie from a custom tag with the following code.
private void writeCookie(){
 Cookie cookie = new Cookie("TEST", "cookie_value_from_tag");
 cookie.setMaxAge(60*60*24*7* 52);
 cookie.setComment("Test_CookieFromCuttomTag");
 cookie.setPath("/student");
 javax.servlet.http.HttpServletResponse resp = (javax.servlet.http.HttpServletResponse)pageContext.getResponse();
 System.out.println("Adding test cookie from CustomTag");
 resp.addCookie(cookie);
 System.out.println("DONE Adding test cookie from CustomTag");
 }The cookie never appears on my machine.
I see the messages that wrap the resp.addCookie() method
so I know the code is being called.
What am I doing Wrong?
My Browser is set to accept ALL cookies.
I am using Tomcat 4.1.27
Any and all help is greatly appreciated
Sean

Actually, the cookie is not writing when I am using <jsp:include>
It works fine when I do not use include
the jsp I am using to include is
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"
xmlns:registration="urn:jsptld:/WEB-INF/enrollment.tld"
xmlns:html="urn:jsptld:/WEB-INF/struts-html.tld"
xmlns:logic="urn:jsptld:/WEB-INF/struts-logic.tld"
xmlns:bean="urn:jsptld:/WEB-INF/struts-bean.tld"
xmlns:common="urn:jsptld:/WEB-INF/common.tld"
version="2.0" >
<jsp:directive.page language="java" contentType="text/html;charset=UTF-8"/>
<html xmlns:jsp="http://java.sun.com/JSP/Page">
<body>
 <jsp:include flush="true" page="forgotPasswordChallenge.jsp"/>
 <jsp:include flush="true" page="new_forgotPassword.jsp"/>
 <common:validation_message/>
</body>
</html>
</jsp:root>the custom tag is <common:validation_message/>
Any Ideas on why this is occuring?

For your reference: A real life AppleScript script regarding custom tags

I'm working through a collection of photographs from iPhoto. One problem I have is that I have more than one set of the photographs and trying to eradicate duplicates and identify the true original images is rather difficult.
One thing that can help is referring to the complete EXIF data from the image file. Unfortunately, Aperture doesn't give us the complete EXIF set, only a subset. In addition, Aperture doesn't allow us to see the File date/time; only the Image date/time.
So I wrote this script. Before running the script, I batch renamed all of the images in my subject project using '<counter 4>—<Master Name>' to be sure that every image had a unique name. I then exported the masters from the subject project using '<Version Name>', the reason being that Aperture doesn't allow access to the file name via AppleScript. GraphicConverter will read the EXIF data from this exported set and the script will write most of the EXIF data back to the image in Aperture via custom tags.
One caveat: Aperture is *slow*. It requires almost 4 seconds to write each custom tag. With 6000+ images in my subject project, this script will take a while to complete.
The script:
tell application "Aperture"
activate
tell project "untitled Project" of folder ""
-- set theImages to every image version
-- move through the images one by one, deleting and creating the appropriate
-- custom tags from exif text obtained from exported versions via GraphicConverter.
repeat with i from 1 to theImages's length
tell theImages's item i
-- tell image version id "++s5iIgRT1uKC8lrxd5bMg" -- test image
delete (every custom tag whose name begins with "GC–")
set exifdata to getEXIF(name) of me
repeat with i from 1 to exifdata's length
copy ("GC– " & exifdata's item i's first item) to tName
copy (exifdata's item i's second item) to tValue
make new custom tag with properties {name:tName, value:tValue}
end repeat
end tell
end repeat
end tell
end tell
return
property exportedImagesFolder : alias "Bulbul:- exported from Aperture -:Canon IXUS 2:"
property exifTagsToIgnore : {"Make", ¬
"Model", ¬
"Resolution unit", ¬
"Y and C positioning", ¬
"Exposure time", ¬
"F number", ¬
"Exif version", ¬
"Meaning of each component", ¬
"Shutter speed", ¬
"Aperture", ¬
"Exposure bias", ¬
"Maximum lens aperture", ¬
"Metering mode", ¬
"Flash", ¬
"Lens focal length", ¬
"Unknown tag (1)", ¬
"Owner Name", ¬
"Color Space", ¬
"Interoperability Index", ¬
"Focal plane resolution unit", ¬
"White balance", ¬
"Resolution unit", ¬
"Offset to JPEG SOI", ¬
"Bytes of JPEG data"}
to getEXIF(vName)
copy alias ((exportedImagesFolder as string) & vName & ".jpg") to vFile
tell application "GraphicConverter"
copy (get file exif of vFile) to theEXIF
end tell
set AppleScript's text item delimiters to ","
repeat with i from 1 to theEXIF's length
set theEXIF's item i to ¬
{text item 3 of theEXIF's item i, text from text item 4 to -1 of theEXIF's item i}
end repeat
set AppleScript's text item delimiters to ""
set newEXIF to {}
set fileDate to ""
set imageDate to ""
repeat with i from 1 to theEXIF's length
copy theEXIF's item i's first item to tName
if tName is not in exifTagsToIgnore and ¬
tName does not start with "Unknown" then
set end of newEXIF to theEXIF's item i
if tName begins with "File date and time" then
set fileDate to date (theEXIF's item i's second item)
else if tName begins with "Date and time of original" then
set imageDate to date (theEXIF's item i's second item)
end if
end if
end repeat
if fileDate is not "" and imageDate is not "" then
if fileDate is less than (imageDate + 24 * 60 * 60) then
set end of newEXIF to {"File & Image Same Date", "True"}
else
set end of newEXIF to {"File & Image Same Date", "False"}
end if
end if
return newEXIF
end getEXIF

Correction 1:
please uncomment the line near the top of the script that reads:
-- set theImages to every image version
Correction 2:
writing the custom tags via AppleScript gets faster after Aperture's done it a few times.

Creating an action link in a custom tag

What is the recommended way of creating an action url (and some parameters) through code, not through a netui tag? I'm writing a custom tag that is being used in a PageFlow application. Ultimately the tag puts out a set of links based on some data it collects. I want the links to be action links to the current pageflow and to 'play nice' with the current page flow and other tags.
Since it's in my own custom tag I don't really have the option of using the netui:anchor tag, I need to create the URL for the action invocation through code.
Thanks for any tips.
-Chris

Closing the thread...

Escaping HTML in a Custom Tag

Hello, all. I am sadly failing to find a library function to escape HTML in Java. I'm writing a tag that used to use JSTL as a custom tag and don't know exactly where to find the functionality the JSTL is using. Consider the old JSP:
<c:forEach items="${versions}" var="version">
 <tr>
 <td><c:out value="${version.version}"/></td>
 <td><c:out value="${version.releaseDate}"/></td>
 </tr>
</c:forEach>and the new custom tag class:
public class VersionTableTag implements Tag
 private PageContext context;
 private Tag parent;
 public int doEndTag() throws JspException
 return EVAL_PAGE;
 public int doStartTag() throws JspException
 JspWriter out = context.getOut();
 List versions;
 try
 versions = (List)(context.getVariableResolver().resolveVariable("versions"));
 } catch (ELException e)
 versions = new ArrayList();
 try
 out.println("<table>");
 out.println("<tr>");
 out.println("<th>Version</th>");
 out.println("<th>Release Date</th>");
 out.println("</tr>");
 for (Object o : versions)
 VersionVO version = (VersionVO)o;
 out.println("<tr>");
 out.println("<td>");
 out.println(version.getVersion()); // NOTE: not properly escaped
 out.println("</td><td>");
 out.println(version.getReleaseDate().toString()); // NOTE: not properly escaped
 out.println("</td>");
 out.println("</tr>");
 out.println("</table>");
 } catch (IOException e)
 throw new JspException(e);
 return SKIP_BODY;
}My questions are as follows:
*1.* Is it possible to define a tag using a JSP document rather than a Java class? All I'm really after is something similar to an include but I want to be able to provide attributes to it in the long run.
*2.* Is there some library function I can use to escape the HTML in the VO above?

1. Is it possible to define a tag using a JSP document rather than a Java class? All I'm really after is something similar to an include but I want to be able to provide attributes to it in the long run.Yes. It was introduced with JSP2.0: tag files.
Just like a JSP lets you write a servlet easily, a tag file lets your write a Custom tag class easily.
http://java.sun.com/javaee/5/docs/tutorial/doc/bnama.html
2. Is there some library function I can use to escape the HTML in the VO above?
There is one provided in the jakarta commons "lang" library.
http://commons.apache.org/lang/
They provide a class "StringEscapeUtils" which will do most of the common escaping that you require.
How hard is it to write something that replaces & < and > though?

Custom Tag Calling

Can someone describe the process that JSF Servers use to call a tag. I'm writing a custom tag (actually a library of them) and I need one to call another tag.
in other words:
instead of:
<my:tag1> <my:tag2>
i'm creating a class called my:tag3, that will call both my:tag1 and my:tag2.
That's the short of it, my:tag3 is actually going to do some nifty stuff on the back end, but thats not required for this question. So, how do I get my:tag3's encodeEnd(...) function to create my:tag1 and my:tag2 in the javacode?
Thanks for any help.

I'm writing a custom tag [...] and I need one to call another tag.
in other words:
instead of:
<my:tag1> <my:tag2>
i'm creating a class called my:tag3, that will call both my:tag1 and my:tag2.Do you really need JSP tags for <my:tag1> and <my:tag2>? A tag is just one way of creating a JSF component.
Another way is to associate (in faces-config.xml) a JSF component (of type UITag3) with the tag <my:tag3>. This UITag3 will have 2 sub-components, of type UITag1 and UITag2 and these components are created (and added to the UITag3 component) in the setProperties() method in UITag3Tag.
For example:
public class MyTag3Tag extends UIComponentTag {
 public String getComponentType() { return "my.tag3"; }
 public String getRendererType() { return null; }
 protected void setProperties(UIComponent component) {
 super.setProperties(component);
 List children = component.getChildren();
 UITag1 child1 = new UITag1();
 child1.setValue("XXX");
 children.add(child1);
 UITag2 child2 = new UITag2();
 child2.setValue("YYY");
 children.add(child2);
}Geoff Rimmer

JSP in custom tag attributes...

Sirs,
 A very nice feature from a development perspective, would be the ability
 to use JSP code within custom tags. Say I have a page on which I wish
 to give all the information on a widget. Say further that I have
 implemented a tag that writes out all the info of a widget as HTML
 table. I would like to write something like this:
 <mytaglib:widgetTag widgetID="<%=request.getParameter("widget_id")%>"
 />
 As far as I know, in the current implementation of custom taglibs this
 does not seem to be possible. Instead you end up writing something like
 this:
 <mytaglib:widgetTag>
 <mytaglib:getWidget><%=request.getParameter("widget_id")%>"</mytaglib:getWidget>
 <mytaglib:displayWidget />
 </mytaglib:widgetTag>
 Which is much more like a scripting language than a heirarchical XML .
 Now, I could always just use the request object within the tag helper
 classes, but this gives up flexibility and can introduce security
 issues, and it also makes the tags much more difficult to work with...
 In short, we should push for JSP evaluation of tag attributes. Weblogic
 could leap ahead of other app servers in this area (making up for the
 custom tag performance issues, to be solve in sp6) and Sun would, once
 again, follow Weblogic's lead and rewrite the standard to include this
 functionality.
 Regards,
 Carson Gross


Carson,
 Perhaps the problem is that you are treating custom tags like one would
 construct an imperative language. I have never had to put Java or use beans
 or %= or even parameters to tags into a JSP because of custom tags.
 The real problem is writing/packaging/maintaining all those tags; sure could
 use a tool that did just that ;-)
 Peace,
 Cameron Purdy
 [email protected]
 http://www.tangosol.com
 WebLogic Consulting Available
 "Carson Gross" <[email protected]> wrote in message
 news:[email protected]...
 > Sirs,
 >
 > A very nice feature from a development perspective, would be the ability
 > to use JSP code within custom tags. Say I have a page on which I wish
 > to give all the information on a widget. Say further that I have
 > implemented a tag that writes out all the info of a widget as HTML
 > table. I would like to write something like this:
 >
 > <mytaglib:widgetTag widgetID="<%=request.getParameter("widget_id")%>"
 > />
 >
 > As far as I know, in the current implementation of custom taglibs this
 > does not seem to be possible. Instead you end up writing something like
 > this:
 >
 > <mytaglib:widgetTag>
 >
 >
 <mytaglib:getWidget><%=request.getParameter("widget_id")%>"</mytaglib:getWid
 get>
 >
 > <mytaglib:displayWidget />
 > </mytaglib:widgetTag>
 >
 > Which is much more like a scripting language than a heirarchical XML .
 > Now, I could always just use the request object within the tag helper
 > classes, but this gives up flexibility and can introduce security
 > issues, and it also makes the tags much more difficult to work with...
 >
 > In short, we should push for JSP evaluation of tag attributes. Weblogic
 > could leap ahead of other app servers in this area (making up for the
 > custom tag performance issues, to be solve in sp6) and Sun would, once
 > again, follow Weblogic's lead and rewrite the standard to include this
 > functionality.
 >
 > Regards,
 > Carson Gross
 >

Help! pageContext is NULL in custom tag constructor!

I'm having a problem with a custom tag class, and I'm not sure whether it's because I'm doing something wrong, or because I'm running into a bug with Tomcat, JDK1.4b2, or something else. Basically, I'm finding that the pageContext object is null in the constructor of a custom tag class... something that I'm pretty sure is NOT supposed to happen.
I'm running JDK1.4b2 with Forte CE 3.1 (the bug predates the jumbo fix that brought it up to 3.0) and using Forte's embedded Tomcat.
I'm not sure whether it matters, but here's the sequence of events:
A servlet gets launched,
instantiates an object of type Error_list,
binds Error_list to the request object, and
forwards to a JSP that uses the custom tag defined by ListErrorsTag.
Unfortunately, pageContext is null in ErrorListTag's constructor, so the attempt to get the request object from the pageContext object generates a NullPointerException.
The SERVLET: *****************************************
// relevant lines from the servlet instantiating the object, binding it, and forwarding...
 Error_list errors = new Error_list("BAD_THINGS", "crash and burn");
 request.setAttribute("errors",errors);
 ServletContext sc = this.getServletContext();
 RequestDispatcher rd = sc.getRequestDispatcher("admin_category_create.jsp");
 rd.forward(request,response);
The JSP: ************************************************
In the JSP "admin_category_create.jsp" itself, I specify the taglib:
 <%@ taglib uri='/WEB-INF/AdminTags.tld' prefix = 'admin' %>
and reference it:
 <admin:listErrors>The errors will be listed here</admin:listErrors>
The Explosion of the Taglib: ************************
// beginning of Taglib class:
public class ListErrorsTag extends BodyTagSupport {
 private Error_list errors;
 public ListErrorsTag() {
 super()
 try {
 if (pageContext == null)
 System.out.println("uh oh! pageContext is null");
 ServletRequest request = pageContext.getRequest();
 errors = (Error_list)request.getAttribute("errors");
 catch (NullPointerException e) {
 System.out.println("boom!");
The Result: **************************************
Tomcat's error log:
uh oh! pageContext is null
boom!
if I eliminate the try/catch and allow the NullPointerException to take place, I get:
Error: 500
Location: /admin_category_create.jsp
Internal Servlet Error:
javax.servlet.ServletException
 at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:459)
 at _0002fadmin_0005fcategory_0005fcreate_0002ejspadmin_0005fcategory_0005fcreate_jsp_0._jspService(_0002fadmin_0005fcategory_0005fcreate_0002ejspadmin_0005fcategory_0005fcreate_jsp_0.java:338)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:177)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391)
 at org.netbeans.modules.web.tomcat.JspServlet.service(JspServlet.java:91)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
 at org.apache.tomcat.core.Handler.service(Handler.java:286)
 at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
 at org.apache.tomcat.facade.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:194)
 at admin.processRequest(admin.java:126)
 at admin.doPost(admin.java:144)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
 at org.apache.tomcat.core.Handler.service(Handler.java:286)
 at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
 at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)
 at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
 at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210)
 at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
 at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
 at java.lang.Thread.run(Thread.java:539)
Root cause:
java.lang.NullPointerException
 at AdminTags.ListErrorsTag.(ListErrorsTag.java:32)
 at _0002fadmin_0005fcategory_0005fcreate_0002ejspadmin_0005fcategory_0005fcreate_jsp_0._jspService(_0002fadmin_0005fcategory_0005fcreate_0002ejspadmin_0005fcategory_0005fcreate_jsp_0.java:272)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:177)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391)
 at org.netbeans.modules.web.tomcat.JspServlet.service(JspServlet.java:91)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
 at org.apache.tomcat.core.Handler.service(Handler.java:286)
 at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
 at org.apache.tomcat.facade.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:194)
 at admin.processRequest(admin.java:126)
 at admin.doPost(admin.java:144)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
 at org.apache.tomcat.core.Handler.service(Handler.java:286)
 at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
 at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)
 at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
 at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210)
 at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
 at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
 at java.lang.Thread.run(Thread.java:539)

Doing a little more experimentation, I discovered that pageContext is null in the constructor, but not null in the otherDoStartTagOperations() method (called by the doStartTag() method of the tag's class... it's something Forte forces you to do).
Is this normal? I was under the impression that pageContext is supposed to be defined EVERYWHERE in any class that extends BodyTagSupport... including the class' own constructor.
On a related topic, is there documentation somewhere as to what, exactly, Forte is doing behind the scenes when it's managing a taglib (how it keeps track of them, where it puts config files, how the entries it makes in them are different or extended from the normal layout, etc.)? At the moment, I suspect that half of the grief I'm having with writing taglibs is caused by Forte itself forcing me to do things in a roundabout way that bears little resemblance to the ways shown in different books on the topic (and in fact all but ensures that nearly every published example will fail and require major rewriting because of the way it forces tag classes to be structured), but I don't see any easy way to let Forte handle compiling the classes and testing them with its embedded Tomcat, but do the config file housekeeping myself I can be in control of it.

Sub components problem in custom tag

Hi!
Im writing custom tag that do nothing but can contains other components.
So first I create custom tag with hendler that extends UIComponentTag and component class that extends UIComponentBase
now tag work but i dont see sub components on the page
Second i override encodeChildren and getFamily methods with:
public String getFamily() {
        return "MyCaller";
public void encodeChildren(FacesContext context) throws IOException {
        Iterator ch=this.getChildren().iterator();
        while(ch.hasNext()){
             UIComponent oKid = (UIComponent)ch.next();
             if(oKid.isRendered()){
                oKid.encodeBegin(context);
                oKid.encodeChildren(context);
                oKid.encodeEnd(context);
        super.encodeChildren(context);
    }But subcomponents not rendered on page.
So are you know whats wrong

the problem was in wrong getComponentType() that return wrong value

Confusing execution sequence in Custom tag

I have a custom tag file with the name make_red.cfm that
makes a text passed to it to the color red.
The calling code looks like this:
Main page 
<cf_make_red result="myVar">
Dont mess with the Zohan!!!
</cf_make_red>
back to the main page 
The code in make_red.cfm looks something like this:
<cfoutput>
<hr>
ThisTag.ExecutionMode is #ThisTag.ExecutionMode# 
ThisTag.GeneratedContent is
#ThisTag.GeneratedContent# 
<hr>
<cfif ThisTag.ExecutionMode IS "Start">
Tag start 
<cfif structkeyexists(attributes,"result")>
<cfset evaluate("caller.#attributes.result# =
""CUSTOM_TAG_COMPLETED""")>
</cfif>
Tag processing 
<cfelseif ThisTag.ExecutionMode IS "End">
Tag processed 
<cfset ThisTag.GeneratedContent = ""&ThisTag.GeneratedContent&" ">
The tag ends here 
</cfif>
</cfoutput>
The output looks like this:
Main page
ThisTag.ExecutionMode is start
ThisTag.GeneratedContent is
Tag start
Tag processing
Dont mess with the Zohan!!!
ThisTag.ExecutionMode is end
ThisTag.GeneratedContent is Dont mess with the Zohan!!!
Tag processed
The tag ends here
back to main page
My question is this:
As per the sequence of the statements in the custom tag code,
the text that appears in the beginning of tag file will be printed
after which the processing for the end tag happens in the
<cfif>. The text passed between the <cf_make_red> and
</cf_make_red> i.e. "Dont mess with the Zohan!!!" appears to
be printing before the end tag executes.
Shouldnt the text passed between the <cf_make_red> and
</cf_make_red> come after the end tag is processed? Because
thats where i am making the text red.
Could someone please explain this?

Doing a little more experimentation, I discovered that pageContext is null in the constructor, but not null in the otherDoStartTagOperations() method (called by the doStartTag() method of the tag's class... it's something Forte forces you to do).
Is this normal? I was under the impression that pageContext is supposed to be defined EVERYWHERE in any class that extends BodyTagSupport... including the class' own constructor.
On a related topic, is there documentation somewhere as to what, exactly, Forte is doing behind the scenes when it's managing a taglib (how it keeps track of them, where it puts config files, how the entries it makes in them are different or extended from the normal layout, etc.)? At the moment, I suspect that half of the grief I'm having with writing taglibs is caused by Forte itself forcing me to do things in a roundabout way that bears little resemblance to the ways shown in different books on the topic (and in fact all but ensures that nearly every published example will fail and require major rewriting because of the way it forces tag classes to be structured), but I don't see any easy way to let Forte handle compiling the classes and testing them with its embedded Tomcat, but do the config file housekeeping myself I can be in control of it.

EL expressions not evaluated in custom tag attribute

I'm writing a custom tag implementation where I need to have some attribute values
dynamically evaluated using EL, such that I can write:
<mytaglib:mytag id="${somevar}"/>
I cannot seem to accomplish this, however. My taglib tag definition looks like this:
 <tag>
 <name>mytag</name>
 <tag-class>myclass</tag-class>
 <body-content>empty</body-content>
 <description>
Foo
 </description>
 <attribute>
 <name>articleId</name>
 <required>true</required>
 <rtexprvalue>true</rtexprvalue>
 <type>java.lang.String</type>
 </attribute>
 </tag>
The implementation of myclass extends TagSupport (since I need to get at the PageContext). The setArticleId() method looks like this:
public void setArticleId(String idStr) throws JspException {
if (logger.isDebugEnabled()) {
logger.debug("idStr = " + idStr);
try {
/* XXX: Somehow, the evaluation should happen automagically, but
* I can't figure out why that doesn't happen!
String articleIdStr = (String)pageContext.getExpressionEvaluator().evaluate(
idStr,
java.lang.String.class, pageContext.getVariableResolver(), null);
this.articleId = Integer.parseInt(articleIdStr);
} catch (ELException e) {
throw new JspException("Failed to parse article id expression");
Why does it not work automagically?

Make sure you are working with a JSP 2 container (like Tomcat 5). Also, you should make sure that your web.xml is configured to use the newest Servlet Spec. Read reply #6 on: http://forum.java.sun.com/thread.jspa?threadID=629437 to make sure it is set up properly.
If you are not using a JSP 2.0 container, then you will not be able to use EL in your custom tag. See: http://forum.java.sun.com/thread.jspa?forumID=45&threadID=725503 for alternatives.

Writing a delphi cfx custom tag

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