Hi Adam,
Indeed, the problem occurs when using tr:selectOneChoice or tr:inputText.
With tr:outputText there is no error, it works fine.
Here is the stack trace:
exception
javax.servlet.ServletException: /pages/Example.xhtml @16,55
value="#{myBean.myObject.myProperty.myId}": Target Unreachable, 'myProperty'
returned null
javax.faces.webapp.FacesServlet.service(FacesServlet.java:202)
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:97)
org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:327)
org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:291)
org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:214)
org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:90)
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)
com.iso_ne_on.foss.ui.util.filter.AuthenticationFilter.doFilter(AuthenticationFilter.java:98)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
root cause
javax.faces.el.PropertyNotFoundException: /pages/Example.xhtml @16,55
value="#{myBean.myObject.myProperty.myId}": Target Unreachable, 'myProperty'
returned null
com.sun.facelets.el.LegacyValueBinding.isReadOnly(LegacyValueBinding.java:84)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.EditableValueRenderer.getReadOnly(EditableValueRenderer.java:233)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.FormElementRenderer.renderAsElement(FormElementRenderer.java:174)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.InputLabelAndMessageRenderer.getLabelFor(InputLabelAndMessageRenderer.java:75)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.LabelAndMessageRenderer$Label.getForId(LabelAndMessageRenderer.java:600)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.OutputLabelRenderer.encodeAll(OutputLabelRenderer.java:84)
org.apache.myfaces.trinidad.render.CoreRenderer.delegateRenderer(CoreRenderer.java:294)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.LabelAndMessageRenderer._renderLabelCell(LabelAndMessageRenderer.java:339)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.LabelAndMessageRenderer.encodeAll(LabelAndMessageRenderer.java:253)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.InputLabelAndMessageRenderer.encodeAll(InputLabelAndMessageRenderer.java:117)
org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:181)
org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:673)
org.apache.myfaces.trinidad.render.RenderUtils.encodeRecursive(RenderUtils.java:67)
org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:255)
org.apache.myfaces.trinidad.render.CoreRenderer.encodeAllChildren(CoreRenderer.java:277)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.PanelPartialRootRenderer.renderContent(PanelPartialRootRenderer.java:70)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.BodyRenderer.renderContent(BodyRenderer.java:134)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.PanelPartialRootRenderer.encodeAll(PanelPartialRootRenderer.java:150)
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.BodyRenderer.encodeAll(BodyRenderer.java:76)
org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:181)
org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:673)
com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:252)
com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:249)
com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:249)
com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:573)
org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:178)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:97)
org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:327)
org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:291)
org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:214)
org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:90)
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)
com.iso_ne_on.foss.ui.util.filter.AuthenticationFilter.doFilter(AuthenticationFilter.java:98)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
Regards,
Magdolna
From: "Adam Winer" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: Drop down list issue when using EL
Date: Tue, 16 Jan 2007 15:54:30 -0800
Can you provide a more complete stack trace? I'm wondering
if this is a problem with ValueBinding.isReadOnly() throwing
an exception when ValueBinding.getValue() does not. The
only obvious difference between h: and tr:selectOneChoice
is that tr:selectOneChoice uses ValueBinding.isReadOnly().
-- Adam
On 1/16/07, magdolna holitska <[EMAIL PROTECTED]> wrote:
Hi again,
Here is a little example for the problem I have.
<tr:selectOneChoice id="tr" unselectedLabel=""
value="#{myBean.myObject.myProperty.myId}"
contentStyle="width:10em">
<f:selectItems value="#{myBean.myProperties}"/>
</tr:selectOneChoice>
If myBean.myObject.myProperty is null, I get an error in the UI:
javax.servlet.ServletException
Target Unreachable, 'myProperty ' returned null
If I am replacing the Trinidad drop down list with regular JSF component,
"#{myBean.myObject.myProperty.myId}" resolves to null without a problem:
<h:selectOneMenu id="h" label="Normal Status" unselectedLabel=""
value="#{myBean.myObject.myProperty.myId}"
contentStyle="width:10em">
<f:selectItems value="#{myBean.myProperties}"/>
</h:selectOneMenu>
Any idea why tr:selectOneChoice creates an exception instead of resolving
the value to null?
Is there a nice workaround?
Thank you,
Magdolna
>From: "magdolna holitska" <[EMAIL PROTECTED]>
>Reply-To: [email protected]
>To: [email protected]
>Subject: Re: Drop down list issue when using EL
>Date: Wed, 10 Jan 2007 11:52:05 -0500
>
>Hi Adam,
>
>Thanks a lot for the reply.
>The reason I tried that is to actually do a check for null value.
>
>In my code I have something like:
> value="#{a.b.c}"
>
>As I understood from the EL documentation - if a.b is null, a.b.c should
>automatically resolve to null.
>
>However in my code, if a.b is null it fails with the error:
> javax.servlet.ServletException:
> ...
> Target Unreachable, 'b' returned null
> javax.faces.webapp.FacesServlet.service(FacesServlet.java:202)
>
>What would be the best way to get around it?
>Thanks again,
>
>Regards,
>Magdolna
>
>
>
>
>>From: "Adam Winer" <[EMAIL PROTECTED]>
>>Reply-To: [email protected]
>>To: [email protected]
>>Subject: Re: Drop down list issue when using EL
>>Date: Tue, 9 Jan 2007 16:19:20 -0800
>>
>>A value expression like #{true ? ... : ...} is not writable -
>>if you call ValueBinding.isReadOnly(), it returns true.
>>As a result, Trinidad automatically turns the
>>selectOneChoice to readOnly mode.
>>
>>For a writable EL expression, you have to just point
>>at a bean property.
>>
>>-- Adam
>>
>>
>>On 1/9/07, magdolna holitska <[EMAIL PROTECTED]> wrote:
>>>Hi all,
>>>I have a drop down list and I am trying to set the value selectively.
>>>Whenever I use EL in the code, the drop down list disappears and
instead,
>>>it
>>>has the appearance of an output text.
>>>Any hints?
>>>
>>>Thank you,
>>>Magdolna
>>>
>>>
>>>Here is a simple example:
>>><tr:selectOneChoice id="ex" label="Example" value="#{true ? 'L1' :
>>>'L2'}">
>>> <tr:selectItem label="L1" value="L1"/>
>>> <tr:selectItem label="L2" value="L2"/>
>>> <tr:selectItem label="L3" value="L3"/>
>>></tr:selectOneChoice>
>>>
>>>_________________________________________________________________
>>>Buy what you want when you want it on Sympatico / MSN Shopping
>>>http://shopping.sympatico.msn.ca/content/shp/?ctId=2,ptnrid=176,ptnrdata=081805
>>>
>>>
>
>_________________________________________________________________
>Your opinion matters. Please tell us what you think and be entered into
a
>draw for a grand prize of $500 or one of 20 $50 cash prizes.
>http://www.youthographyinsiders.com/R.aspx?a=116
>
_________________________________________________________________
Don't waste time standing in line—try shopping online. Visit Sympatico /
MSN
Shopping today! http://shopping.sympatico.msn.ca
_________________________________________________________________
Buy, Load, Play. The new Sympatico / MSN Music Store works seamlessly with
Windows Media Player. Just Click PLAY.
http://musicstore.sympatico.msn.ca/content/viewer.aspx?cid=SMS_Sept192006
