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https://issues.apache.org/jira/browse/TAPESTRY-1065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesse Kuhnert resolved TAPESTRY-1065.
-------------------------------------

    Resolution: Fixed
      Assignee: Jesse Kuhnert

Looks like it's already been resolved to me. 

> TreeDataView.renderComponent() and TreeTableDataView.generateNodeList()  
> cause ClassCastException in ITreeDataModel.getUniqueKey()
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: TAPESTRY-1065
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-1065
>             Project: Tapestry
>          Issue Type: Bug
>          Components: Contrib
>    Affects Versions: 4.0.2
>         Environment: Tapestry 4.0.2
> Java 1.5
> Windows XP
>            Reporter: Ryan Holmes
>         Assigned To: Jesse Kuhnert
>             Fix For: 4.1.2
>
>
> TreeDataView.renderComponent()  calls  ITreeDataModel.getUniqueKey() with a 
> root node object when it should be passing in a rootUID object (line 86 in 
> TreeDataView.java):
>                 Object objChildUID = objTreeModel.getTreeDataModel()
>                         .getUniqueKey(objChild, objRoot);
> Instead of objRoot, objRootUID should be used, which has already been fetched 
> on line 62:
>         Object objRoot = objTreeDataModel.getRoot();
>         Object objRootUID = objTreeDataModel.getUniqueKey(objRoot, null);
> This causes a ClassCastException on line 80 of 
> SimpleTreeDataModel.getUniqueKey():
>               TreePath objPath = (TreePath)objParentUniqueKey;
> SimpleTreeDataModel implements ITreeDataModel correctly (which specifies that 
> a parent UID is to be passed into getUniqueKey() rather than a parent node), 
> and other callers to ITreeDataModel.getUniqueKey() pass in a parent UID, so I 
> believe this is a straightforward bug in TreeDataView and TreeTableDataView.
> The same bug exists in TreeTableDataView.generateNodeList() on line 117:
>                     Object objChildUID = 
> objTreeModel.getTreeDataModel().getUniqueKey(
>                             objChild,
>                             objRoot);

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