[#SM-50] NullPointerException when using useMenuDisplayer tag without id attribute

Struts Menu

NullPointerException when using useMenuDisplayer tag without id attribute

Created: 14/Jul/06 04:28 AM Updated: 06/Oct/06 12:35 AM

Component/s:

Displayers

Affects Version/s:

2.4.1

Fix Version/s:

2.4.2

Description

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Hi,

if I try the examples that comes with struts-menu 2.4.1, I receive the following NPE:

java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:393)
at org.apache.jasper.runtime.PageContextImpl.setAttribute(PageContextImpl.java:234)
at net.sf.navigator.taglib.UseMenuDisplayerTag.doStartTag(UseMenuDisplayerTag.java:223)
at org.apache.jsp.coolmenu4_jsp._jspx_meth_menu_useMenuDisplayer_0(coolmenu4_jsp.java:159)
at org.apache.jsp.coolmenu4_jsp._jspService(coolmenu4_jsp.java:83)

This is caused because the id attribute on the useMenuDisplayer tag is not specified in the examples.
For instance, the following JSP code causes this exception:

<menu:useMenuDisplayer name="CoolMenu" bundle="org.apache.struts.action.MESSAGE">
    <menu:displayMenu name="ToDoListMenuFile"/>
    <menu:displayMenu name="ToDoListMenuEdit"/>
    <menu:displayMenu name="CaseDetailMenuCase"/>
</menu:useMenuDisplayer>

After adding an id attribute, everything worked well

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Matt Raible - 14/Jul/06 08:40 AM

Can you point to a URL where this happens on the demo site?

http://demo.raibledesigns.com/struts-menu

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Maarten Coene - 14/Jul/06 10:13 AM

No, this happens when I deploy the examples on my local tomcat (version 4.1.30).

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Matt Raible - 14/Jul/06 10:19 AM

What's the local URL (with localhost:8080, etc.)?

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Maarten Coene - 14/Jul/06 10:23 AM

http://127.0.0.1:8080/struts-menu-2.4.1/coolmenu4.jsp