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https://issues.apache.org/jira/browse/ARROW-7373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16993670#comment-16993670
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Francois Saint-Jacques commented on ARROW-7373:
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Be careful by passing a RandomAccessFile, they require materializing a file
descriptor, path don't.
> [C++][Dataset] Remove FileSource
> --------------------------------
>
> Key: ARROW-7373
> URL: https://issues.apache.org/jira/browse/ARROW-7373
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++ - Dataset
> Affects Versions: 0.15.1
> Reporter: Ben Kietzman
> Assignee: Ben Kietzman
> Priority: Minor
> Fix For: 1.0.0
>
>
> FileSource doesn't do enough, and should be removed. Methods in
> {{FileFormat}} etc which reference the class should be refactored to take a
> {{RandomAccessFile}} and convenience overloads provided to take a buffer or a
> (path, filesystem).
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