[jira] [Resolved] (HADOOP-16673) Add filter parameter to FileSystem>>listFiles

["Steve Loughran (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-16673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran resolved HADOOP-16673.
-------------------------------------
    Resolution: Won't Fix

> Add filter parameter to FileSystem>>listFiles
> ---------------------------------------------
>
>                 Key: HADOOP-16673
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16673
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>            Reporter: Attila Magyar
>            Priority: Major
>
> Currently getting recursively a filtered list of files in a directory is clumsy because filtering should happen afterwards on the result list.
> Imagine we want to list all non hidden files recursively.
> The non hidden files filter is defined as: 
> {code:java}
> !name.startsWith("_") && !name.startsWith(".") {code}
>  
> Then we can do:
>  
> {code:java}
> RemoteIterator<LocatedFileStatus> remoteIterator = fs.listFiles(path, /*recursive*/true);
> while (remoteIterator.hasNext()) {
>  LocatedFileStatus each = remoteIterator.next();
>  if (filter applies to all of the path elements in each) {
>    result.add(each);
>  }
> }
>  
> {code}
>  
> For example each of these paths should be skipped:
>  * /.a/b/c
>  * /a/.b/c
>  * /a/b/.c/
> It would be lot better to have a filter parameter on listFiles. This is needed to solve HIVE-22411 effectively. 



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