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From "John MccLain" <jmccl...@tcshealthcare.com>
Subject Why no paramters in TLD function???
Date Fri, 27 May 2005 16:59:58 GMT
This is strange,
I have a jsp that accessess a function declared in a TLD file. The function
has NO paramters passed to it. When I try to compile the jsp into a servlet
via tomcat jasper, I get:

C:\Tomcat\webapps\Acuity\build.xml:98: org.apache.jasper.JasperException:
The class  specified in the method signature in TLD for the function
rules:getAutoRefresh1 cannot be found.

OK - but I have done this before a million times and I know it works, so I
looked at working examples of my code where I did this and the only
difference is that this function takes no parameters. So for an experiment,
I changed the TLD, the jsp and the class to have a dummy int parmater passed
to the function - not used just passed - AND IT COMPILED!?! WHY DOES IT
MATTER IF THERE ARE PARAMTERS OR NOT - AM I DOING SOMETHING WRONG??? IS IT
BECAUSE IT IS A GET METHOD???
here is the test jsp and .tld file


THIS DOESNT WORK...
JSP
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="rules" uri="/WEB-INF/tlds/rules.tld" %>
<%@ page isELIgnored="false" %>
<c:set var="autoRefresh" value="${rules:getAutoRefresh1()}" />
<html>
<head>
</head>
<body>
</body>
</html>

RULES.TLD
<?xml version="1.0" encoding="UTF-8" ?>

<taglib 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/j2eeweb-jsptaglibrary_2_0.x
sd"
  version="2.0">

  <description>TCS Rule Engine Library</description>
  <display-name>TCS Rule Engine Functions</display-name>
  <tlib-version>1.0</tlib-version>
  <short-name>rules</short-name>
  <uri>/WEB-INF/tags/Rules.tld</uri>

   <function>
    <name>getAutoRefresh1</name>
    <description>
      Retrieves the auto refresh token setting
    </description>
    <function-class>tcsServices.RulesMgr</function-class>
    <function-signature>java.lang.String
GetAutoRefresh1()</function-signature>
  </function>
</taglib>

CODE
 public static String GetAutoRefresh1()
  {
    String refresh = "N";
    if( autoRefresh )
    {
      refresh = "Y";
    }

    return refresh;
  }



THIS WORKS?!?....
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="rules" uri="/WEB-INF/tlds/rules.tld" %>
<%@ page isELIgnored="false" %>
<c:set var="autoRefresh" value="${rules:getAutoRefresh1(1)}" />
<html>
<head>
</head>
<body>
</body>
</html>

RULES.TLD
<?xml version="1.0" encoding="UTF-8" ?>

<taglib 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/j2eeweb-jsptaglibrary_2_0.x
sd"
  version="2.0">

  <description>TCS Rule Engine Library</description>
  <display-name>TCS Rule Engine Functions</display-name>
  <tlib-version>1.0</tlib-version>
  <short-name>rules</short-name>
  <uri>/WEB-INF/tags/Rules.tld</uri>

   <function>
    <name>getAutoRefresh1</name>
    <description>
      Retrieves the auto refresh token setting
    </description>
    <function-class>tcsServices.RulesMgr</function-class>
    <function-signature>java.lang.String
GetAutoRefresh1(int)</function-signature>
  </function>
</taglib>

CODE
 public static String GetAutoRefresh1(int i)
  {
    String refresh = "N";
    if( autoRefresh )
    {
      refresh = "Y";
    }

    return refresh;
  }



John McClain
Senior Software Engineer
TCS Healthcare
jmcclain@tcshealthcare.com
(530)886-1700x235
"Skepticism is the first step toward truth"


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