7 Replies Latest reply on Feb 27, 2009 7:32 PM by salski22

pagination - jsp, xhtml, tld

salski22 Feb 22, 2009 10:25 PM

In jsp I have found pagination that uses tld so I can add tag in jsp to display paging with dataTable, does anybody know how to do pagination using xhtml and dataTable?

JSP page with working pagination

<html>
   <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
   <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
   <%@ taglib uri="http://corejsf.com/pager" prefix="corejsf" %>

   <f:view>
      <head>                  
         <link href="styles.css" rel="stylesheet" type="text/css"/>
         <title>Test komponentu przewijania</title>
      </head>
      <body>
         <h:form>
            <h:dataTable id="timezones" value="#{bb.data}" var="row" rows="10">
               <h:column>
                  <h:selectBooleanCheckbox value="{bb.dummy}" onchange="submit()"/>
               </h:column>
               <h:column>
                  <h:outputText value="#{row}" />
               </h:column>
            </h:dataTable>
            <corejsf:pager dataTableId="timezones" 
               showpages="20" selectedStyleClass="currentPage"/>
               <h:commandButton value="foo"/>
         </h:form>
      </body>
   </f:view>
</html>

I cant make it work in seam project with xhtml
Link or sample may be helpfull

Regards

1. Re: pagination - jsp, xhtml, tld

niox.nikospara.yahoo.com Feb 23, 2009 11:18 AM (in response to salski22)

Hi,

You need to define a Facelet tag for this job. Having the component and renderer ready for it, it is really easy.

(I guess your code comes from http://www.javapassion.com/handsonlabs/jsfdatatable/)

1) Add a context-param in web.xml (or modify the existing by appending the path to your file):

     <context-param>
          <param-name>facelets.LIBRARIES</param-name>
          <param-value>/WEB-INF/myOwnFacelet.taglib.xml</param-value>
     </context-param>

2) Create the mentioned file:

/WEB-INF/myOwnFacelet.taglib.xml

3) The file contents like this:

<!DOCTYPE facelet-taglib PUBLIC "-//Sun Microsystems, Inc.//DTD Facelet Taglib 1.0//EN" "http://java.sun.com/dtd/facelet-taglib_1_0.dtd">
<facelet-taglib>
     <namespace>http://anything</namespace>
     <tag>
          <tag-name>pager</tag-name>
          <component>
               <component-type>javax.faces.Output</component-type>
               <renderer-type>com.corejsf.Pager</renderer-type>
          </component>
     </tag>
</facelet-taglib>

4) Use it, by defining the proper namespace in your xhtml (note the URL must be the same as in .taglib.xml):

<html
     xmlns="http://www.w3.org/1999/xhtml"
     xmlns:h="http://java.sun.com/jsf/html"
     xmlns:f="http://java.sun.com/jsf/core"
     xmlns:c="http://java.sun.com/jstl/core" 
     xmlns:ui="http://java.sun.com/jsf/facelets"
     xmlns:corejsf="http://anything" 
>

From http://www.javapassion.com/handsonlabs/jsfdatatable/ you need to keep the changes in faces-config.xml, and of course PageRenderer.java. The tag file and class are redundant in a Facelets environment.

Hope it helps!

2. Re: pagination - jsp, xhtml, tld

salski22 Feb 25, 2009 8:55 PM (in response to salski22)

Thanks for reply,
I tried to follow your steps. First I have problems with

<!DOCTYPE facelet-taglib PUBLIC "-//Sun Microsystems, Inc.//DTD Facelet Taglib 1.0//EN" 
"http://java.sun.com/dtd/facelet-taglib_1_0.dtd">
<facelet-taglib>
     <namespace>http://corejsf.com/pager</namespace>
     <tag>
          <tag-name>pager</tag-name>
          <component>
               <component-type>javax.faces.Output</component-type>
               <renderer-type>com.corejsf.Pager</renderer-type>
          </component>
     </tag>
</facelet-taglib>

even thought I have jsf-facelets.jar in librares I get worning

The file cannot be validated as the XML Schema "http://java.sun.com/dtd/facelet-taglib_1_0.dtd" 
that is specified as describing the syntax of the file cannot be located.
     pagerfacelet.taglib.xml     paging/WebContent/WEB-INF     line 2     XML Problem

I tried to use just facelet-taglib10.dtd

<!DOCTYPE facelet-taglib PUBLIC "-//Sun Microsystems, Inc.//DTD Facelet Taglib 1.0//EN" 
"facelet-taglib_1_0.dtd">
<facelet-taglib>
     <namespace>http://corejsf.com/pager</namespace>
     <tag>
          <tag-name>pager</tag-name>
          <component>
               <component-type>javax.faces.Output</component-type>
               <renderer-type>com.corejsf.Pager</renderer-type>
          </component>
     </tag>
</facelet-taglib>>

by adding facelet-taglib10.dtd into WEB-INF still I've got worning and finally error when try to run it :(

20:35:47,247 ERROR [STDERR] 2009-02-25 20:35:47 com.sun.facelets.compiler.TagLibraryConfig loadImplicit
INFO: Added Library from: jar:file:/C:/jbdevstudio/jboss-eap/jboss-as/server/default/deploy/paging.war/WEB-INF/lib/jboss-seam-ui.jar!/META-INF/seam-ui.taglib.xml
20:35:47,720 INFO  [STDOUT] Hibernate: select aaa0_.id as id2_, aaa0_.name as name2_, aaa0_.version as version2_ from aaa aaa0_
20:35:47,748 ERROR [STDERR] 2009-02-25 20:35:47 com.sun.facelets.FaceletViewHandler handleRenderException
SEVERE: Error Rendering View[/aaaList.xhtml]
java.lang.NullPointerException
     at com.corejsf.PagerRenderer.encodeBegin(PagerRenderer.java:17)
     at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:808)
     at org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:280)
     at org.ajax4jsf.framework.renderer.RendererBase.renderChildren(RendererBase.java:262)
     at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:189)
     at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:184)
     at org.ajax4jsf.framework.renderer.RendererBase.encodeChildren(RendererBase.java:121)

It is pointing to PagerRenderer.class which I heve in scr/model in package com.corejsf

Is it because of facelet-taglib10.dtd ????

3. Re: pagination - jsp, xhtml, tld

niox.nikospara.yahoo.com Feb 26, 2009 5:03 PM (in response to salski22)
Hello again,

Is the NullPointerException in this line:

while (!(parent instanceof UIForm)) parent = parent.getParent();

If so, make sure that the <corejsf:pager> is included in a <h:form>, just like the example from javapassion.com.

As for the DTD, it is most probably irrelevant to the error. Never mind it for now, since it will not stop your development, just annoy you with the warnings.

Good luck!
Actions
4. Re: pagination - jsp, xhtml, tld

salski22 Feb 26, 2009 6:57 PM (in response to salski22)
Great many thanks

That was the problem, h:form worked fine but...

in tld file, showpages is set as integer

attribute> <name>showpages</name> <deferred-value> <type>int</type> </deferred-value> </attribute>

and in pageRenderer it is passed to integer as well

Integer a = (Integer) component.getAttributes().get("showpages");

but if I will not set a to static for example like this

Integer a = 20;

and will not remove from xhtml file

showpages="20"

I will get error

java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer

how come????
Actions
5. Re: pagination - jsp, xhtml, tld

niox.nikospara.yahoo.com Feb 27, 2009 10:26 AM (in response to salski22)
Hi,

About the ClassCastException: The TLD is irrelevant, as Facelets uses a completely different technology than JSP for custom tags. So you have a problem indeed. Based on a similar case I had run into, I suggest replacing the renderer code:

Integer a = (Integer) component.getAttributes().get("showpages");

with:

Object o = component.getAttributes().get("showpages"); Integer showpages = null; if( o != null ) { if( o instanceof Integer ) showpages = (Integer) o; else if( o instanceof String ) showpages = Integer.valueOf((String) o); ...and so on, you could also check if o is Number... }

Another suggestion:
The code you are using from the lab page is OK for lab purposes, but I dont think it is really suitable for production applications. In either case I suggest you consider RichFaces. It is much richer and more professional.
Actions
6. Re: pagination - jsp, xhtml, tld

salski22 Feb 27, 2009 6:43 PM (in response to salski22)

O meeeen

RichFaces is working without any problem and it looks so nice.

Ones again thanks for all your HELP

Regards
Actions
7. Re: pagination - jsp, xhtml, tld

salski22 Feb 27, 2009 7:32 PM (in response to salski22)

One more thing, do you know why richfaces is not displaying properly in firefox and it is OK in IE ??
Is there solution for this?
Actions

Go to original post