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From "Niall Pemberton (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (IO-230) DirectoryWalker needs to use generics to avoid compilation warnings
Date Tue, 02 Mar 2010 09:51:27 GMT

     [ https://issues.apache.org/jira/browse/IO-230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Niall Pemberton resolved IO-230.
--------------------------------

       Resolution: Fixed
    Fix Version/s: 2.0

Also see http://markmail.org/message/b7nb3ygsll7j736c

> DirectoryWalker needs to use generics to avoid compilation warnings
> -------------------------------------------------------------------
>
>                 Key: IO-230
>                 URL: https://issues.apache.org/jira/browse/IO-230
>             Project: Commons IO
>          Issue Type: Improvement
>          Components: Utilities
>    Affects Versions: 1.4
>            Reporter: Benoit Sigoure
>            Priority: Minor
>             Fix For: 2.0
>
>
> When overriding methods such as {{handleFile}}, a generic {{Collection}} object is passed
in argument.  One is expected to add something to it, such as in this excerpt from [{{DirectoryWalker}}'s
own javadoc|http://commons.apache.org/io/api-release/org/apache/commons/io/DirectoryWalker.html]:
> {code}
>   protected void handleFile(File file, int depth, Collection results) {
>     [...]
>     results.add(file);  // This lines triggers a warning.
>   }
> {code}
> This code triggers a {{warning: [unchecked] unchecked call to add(E) as a member of the
raw type java.util.Collection}}.  I believe the right fix is to change {{DirectoryWalker}}
to be parameterized by a type {{T}} so that the signature of {{handleFile}} (and other similar
methods) can be changed to receive a {{Collection<T>}} in argument.

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