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From Nicolas Le Bas <m...@nlebas.net>
Subject Re: nullpointer exception in getAsString of tiles 3.0.4 with EL expressions
Date Thu, 11 Sep 2014 03:11:19 GMT
Hi Susan,

Looking through the code, I believe getAsString does not currently 
support expressions. That's weird, I believe it should not be difficult 
to implement.

Can you file an improvement request on jira? 
(https://issues.apache.org/jira/browse/TILES) I'll see if I can put a 
patch together this week and coordinate a new release.

Thanks,
Nick.

On 14-09-07 01:28 PM, Susan Woodbury wrote:
> Hi.
>
> I'm having an issue with configuring tiles 3.0.4 with spring 3.2.10
>
> the following layout.jsp file succeeds to get the title which is set via value=, while
the css and footer which is set via the el functionality fails
> with a nullpointerexception..
> but the footer only fails in getAsString, but not in insertAttribute, so i believe it
should work in getAsString as well.
> Am I missing something?
>
> ==================================================================================================
> the error is:
> DEBUG org.apache.tiles.template.GetAsStringModel  - Ignoring exception
> java.lang.NullPointerException
>      at org.apache.tiles.template.GetAsStringModel.renderAttribute(GetAsStringModel.java:177)
>      at org.apache.tiles.template.GetAsStringModel.execute(GetAsStringModel.java:122)
>      at org.apache.tiles.jsp.taglib.GetAsStringTag.doTag(GetAsStringTag.java:261)
>      at org.apache.jsp.client.default_.layout.layout_jsp._jspx_meth_tiles_005fgetAsString_005f1(layout_jsp.java:258)
>      at org.apache.jsp.client.default_.layout.layout_jsp._jspService(layout_jsp.java:132)
>      at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
>      at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
>      at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
>      at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
>      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
>      at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
>
> ==============================================================================
> I have a tiles_en.xml of:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE tiles-definitions PUBLIC "-//Apache Software Foundation//DTD Tiles Configuration
3.0//EN" "http://tiles.apache.org/dtds/tiles-config_3_0.dtd">
> <tiles-definitions>
> <definition name="nouser.default.definition" templateExpression="/client/default/layout/layout.jsp">
>   <put-attribute name="client" value="${client}"/>
>      <put-attribute name="title" value="| Default" />
>      <put-attribute name="meta" expression="/client/default/layout/meta.jsp"/>
>      <put-attribute name="css" expression="/client/${client}/layout/css/enerwise_v2.css"/>
>      <put-attribute name="css_print" expression="/client/${client}/layout/css/em_print.css"/>
>      <put-attribute name="header" expression="/client/default/layout/header.jsp"/>
>      <put-attribute name="head" expression="/client/default/layout/head.jsp"/>
>      <put-attribute name="menu" expression="/client/default/layout/menu.jsp"/>
>      <put-attribute name="body" expression="/client/default/layout/body.jsp"/>
>      <put-attribute name="footer" expression="/client/${client}/layout/footer.jsp"/>
> </definition>
>
> <definition name="hello.page" extends="nouser.default.definition">
>          <put-attribute name="title" value="| Welcome" />
>          <put-attribute name="body" value="/jsp/helloWorld.jsp" />
> </definition>
>
> </tiles-definitions>
>
> =================================================================================================
> layout.jsp:
>
> <%@taglib uri="http://www.springframework.org/tags" prefix="bean"%>
> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
> <%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles"%>
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
>
> <html xmlns="http://www.w3.org/1999/xhtml">
>      <head>
>      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
>          <title><bean:message code="label.project" /><tiles:getAsString
name="title" /></title>    <!--SUCCEEDS using value=-->
>          <link rel=stylesheet href="<tiles:getAsString name='css'  ignore='true'
/>"    type="text/css" /><!-- FAILS using expression = -->
>          <link rel=stylesheet href="<tiles:getAsString name='css_print' ignore='true'
/>" type="text/css" media="print" /><!-- FAILS using expression =-->
>          <script src="<%=request.getContextPath()%>/js/CalendarPopup.js" type="text/javascript"></script>
>          <script type="text/javascript">document.write(getCalendarStyles());</script>
>          <script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery-1.6.4.min.js"></script>
>          <script language="javascript1.2" src="<%=request.getContextPath()%>/js/jquery.countdown.min.js"></script>
>      </head>
>      <body>
> <a name="top"></a>
> <!-- begin wrapper -->
> <div id="wrapper">
> <!-- begin header -->
> <tiles:insertAttribute name="header" />
> <!-- end header -->
> <!-- begin navigation -->
> <tiles:insertAttribute name='menu' />
> <!-- end navigation -->
> <!-- begin content -->
> <div id="content">
> <tiles:insertAttribute name='body' />
> <br />
> <!-- begin footer -->
> <tiles:getAsString name="footer" ignore='true' /> <!-- FAILS using expression
=-->
> <tiles:insertAttribute name="footer" ignore='true'/><!-- SUCCEEDS using expression
=-->
> <!-- end footer -->
> </div>
> <!-- end content -->
> </div>
> <!-- end wrapper -->
> </body>
> </html>
> ====================================================================================
> Susan M. Woodbury
>
> _______________________________________
>

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