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From "Didier Earith (JIRA)" <j...@apache.org>
Subject [jira] Commented: (VFS-279) ClassCastException in LocalFileSystem when using OnCall caching
Date Mon, 09 Nov 2009 07:35:32 GMT

    [ https://issues.apache.org/jira/browse/VFS-279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12774882#action_12774882
] 

Didier Earith commented on VFS-279:
-----------------------------------

I don't have any simple unit tests to illustrate the behavior.

Just see that fileObject can be an instance of DecoratedFileObject which doesn't inherited
from AbstractFileObject. 
As LocalFile object inherits from AbstractFileObject, if the object file is an DecoratedFileObject
, you'll get a class cast exception.

See also for example doRename function in the LocalFile class. Or you can search for getAbstractFileObject
function, you will see that :

        "LocalFile localFile = (LocalFile) fileObject;" is never used, but 

        "LocalFile localFile = (LocalFile) FileObjectUtils.getAbstractFileObject(fileObject);"
is always used.

And this lacks in the doReplicateFile function.


> ClassCastException in LocalFileSystem when using OnCall caching
> ---------------------------------------------------------------
>
>                 Key: VFS-279
>                 URL: https://issues.apache.org/jira/browse/VFS-279
>             Project: Commons VFS
>          Issue Type: Bug
>    Affects Versions: 1.0, 1.1, 2.0
>            Reporter: Didier Earith
>             Fix For: 1.0, 1.1, 2.0
>
>         Attachments: LocalFileSystem.java
>
>
> When using OnCall caching in the file system, there is a ClassCastException in the LocalFileSystem#doReplicateFile
function.
> To fix the issue, I replaced :
>         final LocalFile localFile = (LocalFile) fileObject;
> by 
>         final LocalFile localFile = (LocalFile) FileObjectUtils.getAbstractFileObject(fileObject);

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