NumberFormatException: For input string: "size"

[legit]

I'm getting this exception when trying to print out the size of a list:

java.lang.NumberFormatException: For input string: "size"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:449)
at java.lang.Integer.parseInt(Integer.java:499)
at javax.el.ListELResolver.toInteger(ListELResolver.java:407)
at javax.el.ListELResolver.getValue(ListELResolver.java:199)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:175)
at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:71)
at org.apache.el.parser.AstValue.getValue(AstValue.java:134)
at org.apache.el.parser.AstDeferredExpression.getValue(AstDeferredExpression.java:42)
at org.apache.el.parser.AstCompositeExpression.getValue(AstCompositeExpression.java:47)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:187)
at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:55)
at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:55)
at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:106)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:190)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:178)
at org.richfaces.component.UIPanel.getHeader(UIPanel.java:118)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at javax.faces.component.UIComponentBase$AttributesMap.get(UIComponentBase.java:2206)
at org.richfaces.renderkit.html.PanelRenderer.encodeEnd(PanelRenderer.java:126)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:879)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1650)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1646)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1646)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:389)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:127)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:269)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:269)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:117)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)

... and so on

The code that is generating this looks like:

<rich:panel id="myPanel" header="#{myClass.myList.size()}">

     ... inside panel stuff

</rich:panel>

this works fine in glassfish but not in JBoss, any idea's on what is happening here because I'm lost?

[nbelaevski]

Hi,

It seems this is happenning because your version of JBoss does not correctly work with the latest version of EL implementation - it is trying to evaluate '.size()' as index of item in the list and is failing. Use fn:length JSTL function. 

[legit]

So.... JBoss AS6 doesn't support the latest?

can you give me an example of how to use the fn:length function?

[nbelaevski]

It should support that - I guess the reason is in different order of EL resolvers then. Anyway, use JSTL fn:length function.

[legit]

I thought it was considered bad practice to use JSP tags inside of JSF 2.0?

[spiritfox26]

Yo can create a property in the bean ej:

public int getListSize(){

     return list.size();

}

in the panel header="#{myClass.listSize}"

Regards

[legit]

Thanks Agustin, I was planning on doing something like that.

Really annoying that I have to create a hack in my code because of a bad implementation in the server though...

[spiritfox26]

Yes, but all have bugs in our apps. Would be worse if you don't have a solution.

Regards

[nbelaevski]

I'd suggest to repost the problem at JBoss AS forum - they should have more information on why this is happenning.

[legit]

http://community.jboss.org/thread/164670