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https://issues.apache.org/jira/browse/VFS-807?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
L updated VFS-807:
------------------
Attachment: vfs-807.diff
> LocalFile migration to NIO is not done correctly
> ------------------------------------------------
>
> Key: VFS-807
> URL: https://issues.apache.org/jira/browse/VFS-807
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: 2.9.0
> Reporter: L
> Priority: Blocker
> Fix For: 2.9.1
>
> Attachments: TestJdkWriteFile.java, vfs-807.diff
>
>
> According to release notes
> ([https://archive.apache.org/dist/commons/vfs/RELEASE-NOTES.txt),] version
> 2.9.0 includes the following change:
> Replace construction of FileInputStream and FileOutputStream objects with
> Files NIO APIs. #164. Thanks to Arturo Bernal.
> Strangely, it was not completed: LocalFlie.java has the following now, even
> in master:
> {code:java}
> /**
> * Creates an input stream to read the content from.
> */
> @Override
> protected InputStream doGetInputStream(final int bufferSize) throws
> Exception {
> return new FileInputStream(file);
> }
> {code}
>
> But what is worse, doGetOutputStream is *completely* broken:
> {code:java}
> /**
> * Creates an output stream to write the file content to.
> */
> @Override
> protected OutputStream doGetOutputStream(final boolean bAppend) throws
> Exception {
> return Files.newOutputStream(file.toPath(), bAppend ?
> StandardOpenOption.APPEND : StandardOpenOption.CREATE);
> } {code}
>
> This can be demonstrated with a small java program, see attachment. The
> program just tries to write to a local file (into the same directory), using
> different ways to do it:
> # Java IO, how it was done before VFS 2.9.0
> # Java NIO the way VFS 2.9.0 does it
> # Java NIO the way it must be done
> What is important, the program also verifies the result.
> VFS 2.9.0 fails in 2 cases:
> # When the file does not exist and append must be performed:
> java.nio.file.NoSuchFileException is thrown in this case.
> # When the file exists and no append must be performed: the file is not
> truncated, so whatever is written overwrites the beginning of the file,
> keeping the rest.
>
>
>
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