Creating deferred-value custom tags

I'm creating my own custom tag using the /WEB-INF/tags/ implementation
(see page: http://today.java.net/pub/a/today/2003/11/14/tagfiles.html)
I need to pass a deferred value attribute but I get an error that states "According to the TLD, the attribute is not a deferred-value but the specified value contains a #-expression.
Any ideas what I'm missing?
Thanks,
Corinne
Message was edited by:
CEckel

No, there is no workaround I am aware of for this.
I would recommend you just copy the struts tld, map it to a different URI and then add your custom extension stuff to that.

Similar Messages

How to create a new custom tag in JSF 1.2

Hi there,
In JSF 1.2, all the classes (CommandButtonTag, CommandLinkTag, DataTableTag,...) in package com.sun.faces.taglib.html_basic are defined as final class. In JSF 1.1, we can create a custom tag that extends the tag in JSF taglib; it save us lots of time.
Could anybody know how to create a new custom tag in JSF 1.2?
Many thanks,
Emily

If I recall, it was done because how tags were to be handled in 1.2 was very different from 1.1 and it was felt that developers shouldn't rely on implementation specific classes (unless they were SPI) for several other reasons (application portability being the big one here).
If it's felt that this was the wrong decision, please feel free to log an issue [1] against the RI (to date, no one has).
As to the 'borked' dependency URLs, please log an issue [1] if you find these. We have nightly builds going that work from a clean workspace and checking today's result, it seems ok.
[1] https://javaserverfaces.dev.java.net/issues

Where to place tld,tag class files to create a small custom tag

hi ,
please any one help me to create a small custom plugin wothout using JSTL

Your TLD will reside in the WEB-INF/ directory, whereas your tag class will be put into WEB-INF/classes/ directory, depending on your package it'll live in a directory somewhere under that. Of course, you could also put the TLD and tag class into a JAR file and place that under WEB-INF/lib/

Problem creating custom tag

I tried to create a simple custom tag using apache webserver. my jsp file is HelloWorld.jsp (for presentation, codes listed below), my HelloWorld.java class (listed below) ,a and my TLD file is called WoaTagLibDesc (also listed below). I ran this and I got this error message below:
HTTP status 404
type status report
message:
description The requested resource () is not available.
Apache Tomcat/6.0.18
Can anybody advise me on what to do please
(1) HelloWorld.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@taglib uri="/WEB-INF/woatags/WoaTagLibDesc.tld" prefix="mt" %>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <mt:helloWorld/>
    </body>
</html>
(2) WoaTagLibDesc.tld<?xml version="1.0" encoding="UTF-8"?>
<taglib version="2.0" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-jsptaglibrary_2_0.xsd">
<tlib-version>1.0</tlib-version>
<short-name>woataglibdesc</short-name>
<uri>/WEB-INF/woatags/WoaTagLibDesc</uri>
<tag>
<name>helloWorld</name>
<tag-class>woatag.HelloWorldTag</tag-class>
<body-content>empty</body-content>
</tag>
</taglib>
(3) HelloWorldTag.java
import java.io.IOException;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public class HelloWorldTag implements Tag {
    private PageContext pageContext;
    private Tag parent;
    public HelloWorldTag() {
        super();
    public void setPageContext(final PageContext pageContext) {
        this.pageContext = pageContext;
    public void setParent(final Tag parent) {
        this.parent = parent;
    public javax.servlet.jsp.tagext.Tag getParent() {
        return parent;
    public int doStartTag() throws JspException {
        return SKIP_BODY;
    public int doEndTag() throws JspException {
        try {
            pageContext.getOut().write("Hello World!");
        } catch (IOException e) {
            throw new JspTagException("IO Error: " + e.getMessage());
        return EVAL_PAGE;
    public void release() {
}

Your class (according to what is posted) is in the package mytag.
So in your tld: <tagclass>tag.Hello</tagclass>should be<tagclass>mytag.Hello</tagclass>cheers,
evnafets

Trying to create custom tag library

I'm a novice trying to create a simple custom tag library application. As such I need a couple import statements like
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext;
This statements will not compile. I'm using Java 2 1.4_03 and WSDP 1.3. My CLASSPATH currently holds
c:\jwsdp\common\lib\servlet-api.jar
and
c:\j2sdk\lib\mysql-connector-java-3.0.11-stable-bin.jar.
I've got JAVA_HOME set to c:\j2sdk and JWSDP_HOME set to c:\jwsdp.
Thank you very much for any assistance you are able to render.

Thanks for your reply. I'm using the TextPad editor, which uses CLASSPATH.
I've figured out the answer. I needed to add
c:\jwsdp\common\lib\jsp-api.jar
to my CLASSPATH.
Again, thanks.

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.

Custom tag - setProperties() not called

Hi all,
I've created my first custom tag with it's own component class, Tag Class, Renderer and TLD. However, when the JSP first loads, the encode() method fails in trying to get the attribute values from the attribute Map - the Map is empty. Upon further debugging I can see that the Tag class is called and the setter methods are called for each attribute but the setProperties() method is never called before release(), so the attributes are never stored in the UIComponent's attribute Map.
Anybody know what I'm doing wrong?
Some code:
Tag Class...
public class ListShuttleTag extends UIComponentTag
public void setProperites(UIComponent component)
super.setProperties(component);
ComponentTagHelper.setString(component, "sourceValue", sourceValue);
ComponentTagHelper.setString(component, "targetValue", targetValue);
ComponentTagHelper.setInteger(component, "size", size);
ComponentTagHelper.setInteger(component, "targetListWidth", targetListWidth);
ComponentTagHelper.setInteger(component, "sourceListWidth", sourceListWidth);
ComponentTagHelper.setString(component, "sourceCaption", sourceCaption);
ComponentTagHelper.setString(component, "targetCaption", targetCaption);
...TLD...
<taglib>
    <tlib-version>1.1</tlib-version>
    <jsp-version>2.1</jsp-version>
    <tag>
      <name>listShuttle</name>
      <tag-class>com.katun.jsf.tag.ListShuttleTag</tag-class>
      <description>A listShuttle allows the moving of items from one listBox to another</description>
      
      <attribute>
        <name>binding</name>
        <description>
             A binding that points to a bean property
        </description>
      </attribute>
      <attribute>
        <name>id</name>
        <description>The client id of this component</description>
      </attribute>
      <attribute>
        <name>rendered</name>
        <description>Is this component rendered?</description>
      </attribute>
      <attribute>
        <name>disabled</name>
        <description>Is this component disabled?</description>
      </attribute>
      <attribute>
        <name>required</name>
        <description>Is this component required?</description>
      </attribute>
      
      <attribute>
        <name>sourceValue</name>
        <required>true</required>
        <description>A binding for the items in the source list</description>
      </attribute>
      <attribute>
        <name>targetValue</name>
        <description>A binding for the items in the target list</description>
      </attribute>
      <attribute>
        <name>size</name>
        <description>Defines the number of items visible in each list</description>
      </attribute>
      <attribute>
        <name>sourceListWidth</name>
        <description>Width of the source list</description>
      </attribute>
      <attribute>
        <name>targetListWidth</name>
        <description>Width of the target list</description>
      </attribute>
      <attribute>
        <name>sourceCaption</name>
        <description>Label displayed above the source list</description>
      </attribute>
      <attribute>
        <name>targetCaption</name>
        <description>Label displayed above the target list</description>
      </attribute>
    </tag>
...

Gotcha........
First, this is what the jsp spec has to say in sec 1.14.1
When using scriptlet expressions, the expression must
appear by itself (multiple expressions, and mixing of expressions and string
constants are not permitted). Multiple operations must be performed within the
expression.Simple, isnt it ? All you have to is evaluate the expression as a whole.
<form:toolbaritem id="icon_cancelar" action="<%="javascript:listingAction('" + request.getContextPath() + "/logout.do;')"%>" icon<%= request.getContextPath() + " /images/toolbar/Cancelar_32.gif " %>"/>cheers,
ram.

Custom Tag with boolean Attribute problems

Hi,
I've created a simple custom tag that is expecting a boolean attribute called "disabled". In my Tag derived class I've created a setDisabled(boolean b) method and set the following in the tag descriptor:
<attribute>
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     <required>false</required>
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</attribute>I'm using a JSTL expression "${someExpression}" which, when I do a c:out on the value, returns true.
I call the tag like this:
<mytag disabled="${someExpression}"/>However, in my custom tag class the value is passed as false. I can get true passed in if I hard code it, but that isn't going to work.
I've tried a number of different combinations and even read through this forum for the last 2 hours and cannot seem to figure it out.
What am I doing wrong?
Thanks,
John

TLD File, per your previous recommendation:
<attribute>
     <name>disabled</name>
     <required>false</required>
     <rtexprvalue>true</rtexprvalue>
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</attribute>My Tag class (snippet):
public class ButtonTag extends TagSupport
private boolean disabled;
public ButtonTag() {}
public boolean isDisabled()
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public void setDisabled(boolean b)
    disabled = b;
}A sample of the jsp file invoking it:
<c:set var="result" value="${computedValue}"/>
<ltm:button disabled="${result}"/>Regardless of the value of result, ("true" or "false") it always passes false to the setDisabled method of the button tag class.

Using gateway'd URLs in JSP custom tag attributes

Hello,
I am running Plumtree G6 using a gateway prefix to gateway Javascript from a remote server. I have recently discovered, thanks to people's help on the forum here, that in certain cases, you need to wrap a URL in a pt:url tag in order for Plumtree to recognize it as a URL that has to be gateway'd (i.e. a URL inside of a Javascript function).
However, I have a custom tag that contains a contextPath attribute. This custom tag then includes other XML files that get included in the final page that is displayed. I am passing this value as my contextPath:
<mytag:body sessionName="mysession" campusName="SampleCampus" contextPath="<pt:url pt:href='http://localhost:7021/application/scripts' xmlns:pt='http://www.plumtree.com/xmlschemas/ptui/'/>"/>
However, in the resulting content that is created from this custom tag, the contextPath value is still set to <pt:url pt:href=......./>, and not the actual gateway'd URL. I would have thought that Plumtree would have recognized and gateway'd this URL before it got substituted in the custom tag.
Does anyone have any thoughts on how to get around a problem like this? One thought I had was to get ahold of the gateway URL value and pass that value directly in my contextPath attribute. Is it possible to get that gateway value, or is there a better solution here?
Thanks again for any help you can provide.

Chris,
I added your code, changed the portlet's web service to send a login token for this portlet, and was then getting some ClassNotFoundExceptions related to Axis classes. So, I went and added all of the jar files from the devkit's lib directory (i.e. plumtree\ptedk\5.3\devkit\WEB-INF\lib), recompiled, and those errors went away. But, now I see the following error:
java.lang.NoSuchFieldError: RPC
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     at com.plumtree.remote.prc.soap.QueryInterfaceAPIServiceLocator.getQueryInterfaceAPI(QueryInterfaceAPIServiceLocator.java:43)
     at com.plumtree.remote.prc.soap.QueryInterfaceProcedures.(QueryInterfaceProcedures.java:37)
     at com.plumtree.remote.prc.xp.XPRemoteSession.(XPRemoteSession.java:202)
     at com.plumtree.remote.prc.xp.XPRemoteSessionFactory.GetTokenContext(XPRemoteSessionFactory.java:80)
     at com.plumtree.remote.portlet.xp.XPPortletContext.getRemotePortalSession(XPPortletContext.java:261)
     at com.plumtree.remote.portlet.PortletContextWrapper.getRemotePortalSession(PortletContextWrapper.java:45)
     at jsp_servlet._collabrasuite.__riarooms._jspService(__riarooms.java:325)
     at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
     at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
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     at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6718)
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I am using version 5.3 of the EDK, and running Plumtree Foundation G6. Have you ever seen an error like this before?
Thanks again for all of your help.

Custom tag attribute values..

          hi,
          I have created custom tags from my EJB using ejb2jsp tool. I tried the following,
          1 works and the other doesn't,
          a) This works.
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          />
          ----++++++ java.lang.ClassCastException: java.lang.Object at javax.servlet.jsp.tagext.TagData.getAttributeString(TagData.java:165)
          at com.niteo.projects.intelXML.xbrl.ejb.jsp_tags._XBRLContentProvider_se tIdTagTEI.isValid(_XBRLContentProvider_setIdTagTEI.java:37)
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          thx in advance -jay


It seems like you want to be able to clear the default attribute and set an empty attribute in you custom tag. One way around this would be to pass a blank character in. That would force the default to be cleared with the blank. You could take it a step further and trim the attribute value before storing it. Alternatively you could set an overriding attribute such as:
<slasher:foo name="slasher" ignorewhatever="true" />
protected String whatever = "some default Value";
public void setWhatever(String whatever)
     this.whatever = whatever;
public void setIgnorewhatever(String ignore)
     if(ignore.equals("true"))
          this.whatever = "";
}Cliff

Is it possible to pass dynamic values to custom tag?

Hi there, I'm trying to build a calendar custom tag so I can drop the calendar into an existing webpage easily.
I have got the calendar displaying on the page but the problem I have is when I try to create 'previous' and 'next' links. Is it possible to pass parameters to a custom tag that have dynamic values?
In PHP it would looks something like:
<a href="bla.php?page=$pagenumber">next page</a>When I create the calendar object I set it to the current date so when I try to increase or decrease the month (next/prev month) it doesn't work because the code is run again and hence setting the current date again.
Any ideas?
Cheers in advance
Message was edited by:
MajorMahem

for eg
<a href=" Display.jsp?id='+<%=customerId%>">Result Page</a>
Please try this,
i didn't work out, any how apply this sample to your code

Problem in creating a custom tag

Hi All,
I'm new to jstl. I want to create a custom tag. I created a sample java class and sample tld file and I used this file at my page it give me an error. The java and tag file code is as follow
package mytag;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
* This is a simple tag example to show how content is added to the
* output stream when a tag is encountered in a JSP page.
public class Hello extends TagSupport {
     private String name=null;
      * Getter/Setter for the attribute name as defined in the tld file
      * for this tag
public void setName(String value){
    name = value;
     public String getName(){
          return(name);
* doStartTag is called by the JSP container when the tag is encountered
    public int doStartTag() {
       try {
        JspWriter out = pageContext.getOut();
        out.println("<table border=\"1\">");
          if (name != null)
           out.println("<tr><td> Hello " + name + " </td></tr>");
        else
           out.println("<tr><td> Hello World </td></tr>");
       } catch (Exception ex) {
         throw new Error("All is not well in the world.");
       // Must return SKIP_BODY because we are not supporting a body for this
       // tag.
       return SKIP_BODY;
* doEndTag is called by the JSP container when the tag is closed
     public int doEndTag(){
        return EVAL_PAGE;
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN"
"http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
<taglib>
     <tlibversion>1.0</tlibversion>
     <jspversion>1.1</jspversion>
     <shortname>sample</shortname>
     <info>My sample tag</info>
<tag>
    <name>hello</name>
    <tagclass>tag.Hello</tagclass>
    <bodycontent>empty</bodycontent>
    <info>
     This is a simple hello tag.
    </info>
<attribute>
      <name>name</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
</taglib>And I use this tld file in my jsp code I got below error
* org.apache.jasper.JasperException: /mytag.jsp(9,15) Unable to load tag handler class "tag.Hello" for tag "sample:hello"
Help me about this problem.
Edited by: Get2win4world on Dec 15, 2009 1:12 AM

Your class (according to what is posted) is in the package mytag.
So in your tld: <tagclass>tag.Hello</tagclass>should be<tagclass>mytag.Hello</tagclass>cheers,
evnafets

Trying to create a custom tag

I want to create a custom tag that has a attribute that ask
for a number. like below...
<cf_makeattributes number="?">
Now say I made that number something like 5
<cf_makeattributesnumber=
"5">
I would like for the tag to take that number and make 5
attributes called "Form" in a array from 1 to 5 like below...
<cfset attributes.form = arraynew(1)>
<cfloop index="i" from="1" to="#attributes.number#">
#attributes.form
</cfloop>
Is it possible to make a tag that ask for a number like 5 and
make 5 attributes and within the same tag assign values to those 5
attributes. for example consider the above.
<cf_makeattributes number="5" attribute1="hi"
attribute2="hello" attribute3="howdy" attribute4="hey"
attribute5="HOWE!">
or say i want to make 2 attributes and assign 2 values to
those attributes
<cf_makeattributes number="2" attribute1="This tag asked
for 2 numbers" attribute2="and therefore gave me the ability to
make 2 attributes">
I also have another question that kinda applies to the
question above.
How does the coldfusion server read the tags. for example
look at below
<cf_makeattributes number="2" attribute1="hello"
attribute2="world">
would the server read it like this...
step 1
<
cf_makeattributes number="2" attribute1="hello"
attribute2="world">
step 2
<cf_makeattributes
number="2" attribute1="hello" attribute2="world">
step 3
makeattributes.CFM (it now goes to the template that holds
the tags scripts)
Or does it first read all thats bold below
<cf_makeattributes
number="2" attribute1="hello" attribute2="world">
then goes to the makeattributes template. Is there away I
can compile my script one step at a time like C# and C++ just to
see the steps
PLUS Do i have to put my custom tag into a specific folder or
can I just put it in the same folder as the document thats calling
the custom tag

> I could either make a bunch of attributes that will grab
all the
> values or I could loop out a array of attributes. Thats
my goal
I was with you until that line. The term attributes is
confusing in this context. I'm not sure if you're talking about
attributes in a generic sense or the custom tag attribute
scope.
> Now here wat im thinking now. What if instead I put the
forms in a list. something like this...
> <cf_Formentry
Forms="#Form.one#,#form.two#,#form.three#">
Do you mean form
fields?
Let's try this from a different angle. Can you give a
concrete example of the desired results using this form?
<form>
<input name="username1" value="Alice">
<input name="username2" value="Bob">
<input name="username3" value="Kyle">
<input name="username4" value="Michelle">
<input name="username5" value="Robert">
</form>

Passing Javascript Enabled or Disabled value in a custom tag

Hi,
In my JSP I am using a custom tag.
This custom tag is having one attribute called status(whose value will be jsenabled means true or jsdisabled means false) depending on the browser's javascript enabled or disabled
How can i find the value of javascript enabled or javascript disabled and set the value of the attribute status in my jsp.
This is the custom tag
<t:tab summary="tabs" url="/services/eservicepac/registrationprocess/process.wss" tabNames='<%=tabList%>' currentTab="<%=currentTab%>" zone="WWW_ZONE" fetchText="false" status=" "
</t:tab>
The value of this attribute status=" " should be the value of jsenabled or disabled.
Since the user can visit any page at any time, the jsenabled value is not maintained in session or request, so i can't take from session or request also.
As this is urgent,
--I am expecting the reply

Hi Merlin,
In addition to what was written above, you must make sure that you tell your web application to run as a JSP 2.0 web application.
You do this by defining your web.xml a little differently. Like this at the top:
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-app_2_4.xsd">
That should be what you need to get it working correctly.
Damian Sutton

How to create a custom tag for a custom converter

In Jdeveloper 11g, I have a project where I have created a custom converter class that impements the javax.faces.convert.Converter class. I have registered the converter with an id in the faces-config.xml file of the project, and the converter works fine by using the <f:converter type="myconverter"> tag. However, the custom converter has a field which I would like to set from the tag itself. Hence, I would like to add an attribute to <f:converter> tag if possible or create a custom tag that has the attribute.
I have done some reserach and I found that a custom tag can be implemented: I need to create a class which extends from the ConverterTag class or javax.faces.webapp.ConverterElTag class, which I did, but I also need to create ".tld" (tag library) file which defines the tag itself.
The part about creating the ".tld" file and registring the new tag is what I'm not sure how to do.
Does someone know how to do this?
thank you

Hi frank,
that's a good document, and it explains how to make a custom converter. I already created the custom converter, it converts a number to any currency pattern. I know java already has a currency converter, but it doesn't support Rupee currency format, and I need that format.
My converter works, but I would like to pass the pattern of the format through an attribute in a tag. Since f:converter doesn't seem to support that, I created a custom tag which uses my converter, and it enables me to pass a pattern to the converter.
All of that works, but I need to be able to pass the pattern as an EL expression, and it's not evaluating the expression before passing it to the converter. It just passes the whole expression as a string. I'm thinking It may be something I'm doing wrong.
this is the tag library definition file:
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
<tlib-version>1.2</tlib-version>
<jsp-version>2.1</jsp-version>
<short-name>custom</short-name>
<uri>custom-currency-converter</uri>
<description>
custom currency custom tag library
</description>
<tag>
<name>CurrencyConverter</name>
<tag-class>
converter.Tag.CurrencyConverterTag
</tag-class>
<body-content>JSP</body-content>
<attribute>
<name>pattern</name>
<type>java.util.String</type>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
</taglib>
Edited by: Abraham Ciokler on Feb 4, 2011 11:20 AM

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