[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-4382) s:selectItems doesn't reload when backing collection content changes

[Christof Van Hove (JIRA)]

s:selectItems doesn't reload when backing collection content changes
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                 Key: JBSEAM-4382
                 URL: https://jira.jboss.org/jira/browse/JBSEAM-4382
             Project: Seam
          Issue Type: Bug
          Components: JSF Controls
    Affects Versions: 2.1.2.GA
         Environment: Seam 2.1.2.GA / jdk1.6.0_14/ windows xp / jboss-5.1.0.GA
            Reporter: Christof Van Hove


links to the problem in the forum:

http://seamframework.org/Community/SselectItemsDoesntReloadWhenObjectIsAddedToBackingCollection
http://seamframework.org/Community/SselectItemsValueAttributeNotUpdated

The selectItems only get updated if the reference to the backing collection changes:

explanation  from Gena:
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it's a bug the line 159 within the Method Object org.jboss.seam.ui.component.UISelectItems.getValue():

Line 159: if (selectItems == null || originalValue == null || !originalValue.equals(super.getValue())) 

and as you can see, originalValue.equals(super.getValue()) is always true as of implementation of AbstractList

Line 479: AbstractList.equals  if (o == this) return true
So if our base collection still be the same, selectItems doesn't refresh. And this occurs, if the selectItems was already initialized within the same request but with another count of elements (ie. for validate/convert the applied request values) there is no chance to refresh the selectItems unless recreating the collecion - so it's a bug. The new collection resolves the problem, because is not equals to cached one as of AbstractList contract.



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