Facelets: Setter not found for property class

by Duck Ranger on May 15, 2010 · 11 Comments

“Setter not found for property class” is one of the most frustrating errors you can get in a Seam / facelets project.

It usually appears late, and you spend a long time trying to solve it. The solution is so simple you have to bang your hand when you finally find it.

I write this in the hope that it shows first in Google searches for this error…

The stack trace

The stack trace is not very useful:

java.lang.IllegalArgumentException: Setter not found for property class
at javax.faces.component.UIComponentBase$AttributesMap.put(UIComponentBase.java:1594)
at javax.faces.component.UIComponentBase$AttributesMap.put(UIComponentBase.java:1499)
at com.sun.facelets.tag.jsf.ComponentRule$LiteralAttributeMetadata.applyMetadata(ComponentRule.java:49)
at com.sun.facelets.tag.MetadataImpl.applyMetadata(MetadataImpl.java:36)
at com.sun.facelets.tag.MetaTagHandler.setAttributes(MetaTagHandler.java:62)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:144)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.ui.DefineHandler.applyDefinition(DefineHandler.java:64)
at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:131)
at com.sun.facelets.impl.DefaultFaceletContext$TemplateManager.apply(DefaultFaceletContext.java:337)
at com.sun.facelets.impl.DefaultFaceletContext.includeDefinition(DefaultFaceletContext.java:307)
at com.sun.facelets.tag.ui.InsertHandler.apply(InsertHandler.java:68)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
at com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:140)
at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:113)
at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:524)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:567)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)

The issue is actually quite simple – you used a class attribute on a non-html element. I always get it when I translate our designer’s pages to JSF:

...

See the problem? the <s:div> element actually requires a styleClass attribute, not a class.

...

Popularity: 16% [?]

Tagged with: Facelets • Seam

11 Responses to Facelets: Setter not found for property class

Albertoimpl says:

August 18, 2010 at 21:03

Thanks! With tags are allowed?
I have a div with and with one should I use, and how?
Thanks you!
Duck Ranger says:

August 19, 2010 at 14:03

@Albertoimpl – Do you mean which UI tags are allowed? This depends on what tag libraries you are using.
gunhed says:

September 3, 2010 at 22:07

Thank you so much !! You made me win some precious time !! Indeed the exception ‘s cause is not so easy to figure out because with “class” in its label we thing about a Java class and are not focused on the html tag class attribute ‘class=”" !

Bye,
Gunhed french guy
Peter says:

February 7, 2011 at 10:43

Thanks a lot! You have saved my time!!!!

cheers
Duck Ranger says:

February 21, 2011 at 23:12

@gunhed, @Peter – happy to help
Kevin says:

April 29, 2011 at 14:40

Thank you.
Bruno says:

May 17, 2011 at 06:57

Thank you!
Chistiano says:

August 19, 2011 at 03:27

It solve my problem. Thank you!
tharun says:

October 22, 2011 at 02:18

Thanks
Marcio K says:

December 21, 2011 at 02:54

Nailed it, saved me a lot of time. Thanks.
Medovarszki says:

January 28, 2012 at 04:22

This post saved my hair from falling out but yeah, I beat my head against the wall now too