[richfaces-issues] [JBoss JIRA] (RF-7524) rich:columns throws Exception when value is null

[Tom Caflisch (JIRA)]

    [ https://issues.jboss.org/browse/RF-7524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12742744#comment-12742744 ] 

Tom Caflisch commented on RF-7524:
----------------------------------

As a workaround you can just use a ternary operator to check for null like this:

<rich:columns value="#{myBacker.columns == null ? '' : myBacker.columns}"
                
> rich:columns throws Exception when value is null
> ------------------------------------------------
>
>                 Key: RF-7524
>                 URL: https://issues.jboss.org/browse/RF-7524
>             Project: RichFaces
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: component-tables
>    Affects Versions: 3.3.1, 3.3.2.SR1
>         Environment: Windows Vista, Java 6, JBoss 4.2.2.GA, JBoss Seam 2.1.1.GA
>            Reporter: Markus Merder
>            Priority: Minor
>             Fix For: 3.Future
>
>
> Since Richfaces Version 3.3.1.GA an exception is thrown, when value of rich:columns is null. 
> For example:
> <rich:columns value="#{someList[0].years}" var="year" index="index" rendered="#{not empty someList[0].years}">...</rich:columns>
> throws: 
> javax.servlet.jsp.JspTagException: FOREACH_BAD_ITEMS
> 	at org.richfaces.iterator.SimpleForEachIterator.toForEachIterator(SimpleForEachIterator.java:135)
> 	at org.richfaces.iterator.SimpleForEachIterator.supportedTypeForEachIterator(SimpleForEachIterator.java:98)
> 	at org.richfaces.taglib.ColumnsHandler.prepare(ColumnsHandler.java:304)
> 	at org.richfaces.taglib.ColumnsHandler.apply(ColumnsHandler.java:489)
> 	at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
>         ....
> because supportedTypeForEachIterator(Object o) in SimpleForEachIterator is called with null.

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