Forum:

EL Syntax error

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Hello I am trying to write a simple EL example. I am getting "EL Syntax Error" on my jsp page. No able to resolve it. Here is the code:

caseContacts.jsp

Output:
Case Contact List Information

Tue Aug 09 16:26:26 CDT 2011
The key is:${cont:caseContact_pk()}

CaseContactDto.java

caseContact.tld

CaseContactListImpl.java

Paul Clapham

Marshal

Posts: 27987

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Well, I have to say I haven't used taglibs exactly this way. But if your TLD says the function signature is "int getCaseContact_pk()" then shouldn't you call it as "${cont:getCaseContact_pk()}"? Or is there some rule that says you should apply the JavaBeans standards and drop the "get"?

Java 8 (verified skill)
Skill verified by Paul Clapham

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

May be you are right, I got the example on Head First Servlets and Jsp, page 389, where it specifies function name in the Tld file different from the one method name defined in the class. It is not like a java bean. I changed my code to look like this:

Tld file:caseContact.tld

I removed the CaseContactDto.java as I realized it is not like java bean. When I try to output it still comes the same:

Case Contact List Information

Tue Aug 09 16:26:26 CDT 2011
The key is:${cont:caseContact_pk()}

Please help. Thanks.

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Is any EL being evaluates on your JSPs?

[Asking smart questions] [About Bear] [Books by Bear]

HTML 5 (verified skill)
Skill verified by Jeanne Boyarsky

CSS 3 (verified skill)
Skill verified by Jeanne Boyarsky

JavaScript (verified skill)
Skill verified by Jeanne Boyarsky

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

P.S. Your tld URI should be a URI.

[Asking smart questions] [About Bear] [Books by Bear]

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

You are right, No EL is being evaluated. Here is my web.xml if any suggestions.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app id="WebApp">
     <display-name>neddsWeb</display-name>
	
     <servlet>
        <servlet-name>ProcessResultServlet</servlet-name>
        <servlet-class>ne.dds.java.messagepoller.ProcessResultServlet</servlet-class>
    </servlet>

<servlet-mapping>
	<servlet-name>ProcessResultServlet</servlet-name>
	<url-pattern>servlet/*</url-pattern>
    </servlet-mapping>	
	
	
	<servlet>
		<servlet-name>caseCtctDtl</servlet-name>
		<servlet-class>ne.dds.caseControl.efi.actions.CaseContactAction</servlet-class>
	</servlet>

<servlet-mapping>
		<servlet-name>caseCtctDtl</servlet-name>
		<url-pattern>/googleAbout.do</url-pattern>
	</servlet-mapping>
	
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Your web.xml is declared using the Servlets 2.3 DTD. This disables the EL.

Use the Servlets Schema declaration as appropriate to the actual version of Servlets you are using.

See the JspFaq for more info.

[Asking smart questions] [About Bear] [Books by Bear]

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Thanks for the reply. Can you please forward me a link of how to migrate from Servlet 2.3 to Servlet 2.4, if I change the Web-app to the Servlet 2.4 on the Web.xml, I am getting lots of exceptions. I am using RAD 7.5.5.2. Please help.

Thanks,
Luke.

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

What version of Servlets and JSP is support by your server? You'll only be able to use the level that it supports.

[Asking smart questions] [About Bear] [Books by Bear]

Paul Clapham

Marshal

Posts: 27987

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

If you're using RAD then you right click on the Web project and look for the "Migrate" option. If I recall right it isn't right there on the drop-down menu, you have to choose one of the obscurely-named options and "Migrate" is at the second level.

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Bear, I am using IBM Websphere Application Server 6.1, it support Servlets 2.4 and Jsp 2.0

Paul - I right clicked on the project - J2EE - Specifications Migration Wizard. I tried to migrate but still getting the errors.

Here is my
org.eclipse.wst.common.project.facet.core.xml
<?xml version="1.0" encoding="UTF-8"?>
<faceted-project>
<runtime name="was.base.v61"/>
<fixed facet="jst.java"/>
<fixed facet="jst.web"/>
<installed facet="com.ibm.websphere.coexistence.web" version="6.1"/>
<installed facet="jst.java" version="5.0"/>
<installed facet="jst.web" version="2.4"/>
<installed facet="com.ibm.websphere.extended.web" version="6.1"/>
</faceted-project>

and

org.eclipse.jst.common.project.facet.core.prefs.
classpath.helper/org.eclipse.jst.server.core.container\:\:com.ibm.ws.ast.st.runtime.runtimeTarget.v61\:\:was.base.v61/owners=jst.web\:2.4
classpath.helper/org.eclipse.jdt.launching.JRE_CONTAINER\:\

rg.eclipse.jdt.internal.debug.ui.launcher.StandardVMType\:\:WebSphere\ v6.1\ JRE/owners=jst.java\:5.0
eclipse.preferences.version=1

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Luke Zechariah wrote:Bear, I am using IBM Websphere Application Server 6.1, it support Servlets 2.4 and Jsp 2.0

Then there is no reason that you should not be able to declare the app as a servlets 2.4 app.

I've moved this to the Websphere forum for the Websphere-savvy to have a look.

[Asking smart questions] [About Bear] [Books by Bear]

Paul Clapham

Marshal

Posts: 27987

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

I'm more of a Websphere bumbler, but I did just migrate a project from 2.3 to 2.4 in Websphere so I will see if there's anything useful I might say by accident. Here's the start of my web.xml file:

Here's the start of one of my JSPs:

As for the files you posted, I've seen them occasionally when I synchronize the project with the repository but I don't know where to find them in the project, so I can't post my versions.

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

I have ugraded my application from 2.3 to 2.5 successfully. Now it is identifying EL's and there is a new problem for the code on the jsp:

I am getting exceptions:

Error Message:JSPG0227E: Exception caught while translating /caseControl/caseContacts.jsp: /caseControl/caseContacts.jsp(0,1) --> JSPG0122E: Unable to parse EL function ${cont:caseContact_pk()}.

Root Cause:com.ibm.ws.jsp.translator.JspTranslationException: JSPG0227E: Exception caught while translating /caseControl/caseContacts.jsp: /caseControl/caseContacts.jsp(0,1) --> JSPG0122E: Unable to parse EL function ${cont:caseContact_pk()}. at com.ibm.ws.jsp.translator.visitor.validator.ELValidator.validateElFunction(ELValidator.java:497) at com.ibm.ws.jsp.translator.visitor.validator.ELValidator.validateELExpression(ELValidator.java:119) at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.visitJspELTextStart(ValidateVisitor.java:1237) at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.visitCDataTag(ValidateVisitor.java:873) at com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:405) at com.ibm.ws.jsp.translator.visitor.JspVisitor.processChildren(JspVisitor.java:419) at com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:234) at com.ibm.ws.jsp.translator.visitor.JspVisitor.visit(JspVisitor.java:216) at com.ibm.ws.jsp.translator.JspTranslator.processVisitors(JspTranslator.java:127) at com.ibm.ws.jsp.translator.utils.JspTranslatorUtil.translateJsp(JspTranslatorUtil.java:239) at com.ibm.ws.jsp.translator.utils.JspTranslatorUtil.translateJspAndCompile(JspTranslatorUtil.java:109) at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.translateJsp(AbstractJSPExtensionServletWrapper.java:465) at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper._checkForTranslation(AbstractJSPExtensionServletWrapper.java:433) at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.checkForTranslation(AbstractJSPExtensionServletWrapper.java:292) at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:142) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:325) at ne.dds.caseControl.efi.actions.CaseContactAction.doGet(CaseContactAction.java:42) at javax.servlet.http.HttpServlet.service(HttpServlet.java:718) at javax.servlet.http.HttpServlet.service(HttpServlet.java:831) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1449) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:790) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:443) at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175) at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:859) at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1557) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:173) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:272) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113) at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165) at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161) at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138) at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:202) at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:766) at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:896) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)

Please help, thanks,
Luke.

Bibeault can you please move this to the JSP section as it is related to JSPs and not Websphere.

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Compare your call to the function with its declared signature. Do they match?

[Asking smart questions] [About Bear] [Books by Bear]

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Here is code I have:

caseContact.tld:

caseContacts.jsp

CaseContactListImpl.java

Paul Clapham

Marshal

Posts: 27987

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Your function is expecting an HttpServletRequest parameter, but I don't see that you're passing it one. Can you explain how that works?

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Paul,

Thanks for the reply. Do you mean in my jsp I should write:

If my understanding is wrong, can you please help me understand what you meant?

Thanks.

Paul Clapham

Marshal

Posts: 27987

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

I don't know what you should do. I haven't ever written a function as a taglib. I'm just saying, that configuration doesn't look right to me.

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

What do you think? If you declared a Java method to accept a parameter and didn't pass one, would it work? Of course not. How can your EL function execute if it expects a parameter and you don't pass one?

[Asking smart questions] [About Bear] [Books by Bear]

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Bear and Paul,

Thanks for the reply and yes got the answer and is working now. I changed the code on the jsp as follows:

On the web.xml:

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

You don't need the tld declaration in the deployment descriptor. In fact, its considered a poor practice to put it there.

Rather, make sure that the TLD has a bona fide URI defined, and use that URI to let the container auto-discover the tld.

[Asking smart questions] [About Bear] [Books by Bear]

Bear Bibeault

Sheriff

Posts: 67734

173

I like...

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

P.S.

<uri>CaseContactsList</uri>

CaseContactsList is not a great choice for a URI. Something along the lines of:

http://org.luke-zechariah/contacts-tags

would be a better choice.

[Asking smart questions] [About Bear] [Books by Bear]

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Bear you are right in but it is not working:

See I tried as you say, in my tld the uri is as follows in bold:

In the jsp I used:

But I am getting exceptions:

Error Message:JSPG0227E: Exception caught while translating /caseControl/caseContacts.jsp:  /caseControl/caseContacts.jsp(0,1) --> JSPG0005E: tld file could not be found for uri[CaseContactsList] prefix [cont]
 
Root Cause:com.ibm.ws.jsp.translator.JspTranslationException: JSPG0227E: Exception caught while translating /caseControl/caseContacts.jsp:  /caseControl/caseContacts.jsp(0,1) --> JSPG0005E: tld file could not be found for uri[CaseContactsList] prefix [cont1]	at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.visitJspRootStart(ValidateVisitor.java:491)	at com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:233)	at com.ibm.ws.jsp.translator.visitor.JspVisitor.visit(JspVisitor.java:216)	at com.ibm.ws.jsp.translator.JspTranslator.processVisitors(JspTranslator.java:127)	at com.ibm.ws.jsp.translator.utils.JspTranslatorUtil.translateJsp(JspTranslatorUtil.java:239)	at com.ibm.ws.jsp.translator.utils.JspTranslatorUtil.translateJspAndCompile(JspTranslatorUtil.java:109)	at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.translateJsp(AbstractJSPExtensionServletWrapper.java:465)	at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper._checkForTranslation(AbstractJSPExtensionServletWrapper.java:433)	at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.checkForTranslation(AbstractJSPExtensionServletWrapper.java:292)	at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:142)	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:325)	at ne.dds.caseControl.efi.actions.CaseContactAction.doGet(CaseContactAction.java:42)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:718)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1449)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:790)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:443)	at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175)	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91)	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:859)	at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1557)	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:173)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:272)	at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)	at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)	at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)	at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)	at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)	at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)	at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:202)	at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:766)	at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:896)	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)

Luke Zechariah

Ranch Hand

Posts: 146

posted 12 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Ok Bear I got what you are saying. I changed the taglib-uri in the web.xml to something like this:

and the in the jsp to:

Thanks everyone for all the help. It is finally fixed.

So there I was, trapped in the jungle. And at the last minute, I was saved by this tiny ad:

a bit of art, as a gift, the permaculture playing cards

https://gardener-gift.com