org.apache.lucene.mockfile

## Class ShuffleFS

- java.lang.Object
- - java.nio.file.spi.FileSystemProvider
  - - org.apache.lucene.mockfile.FilterFileSystemProvider
    - - org.apache.lucene.mockfile.ShuffleFS

-     public class ShuffleFS
      extends FilterFileSystemProvider

  Gives an unpredictable, but deterministic order to directory listings.

  This can be useful if for instance, you have build servers on linux but developers are using macs.

- - ### Field Summary

    - ### Fields inherited from class org.apache.lucene.mockfile.FilterFileSystemProvider

      `delegate, fileSystem, scheme`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ShuffleFS(FileSystem delegate, long seed)` Create a new instance, wrapping `delegate`.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `DirectoryStream<Path>` | `newDirectoryStream(Path dir, DirectoryStream.Filter<? super Path> filter)`

    - ### Methods inherited from class org.apache.lucene.mockfile.FilterFileSystemProvider

      `checkAccess, copy, createDirectory, createLink, createSymbolicLink, delete, deleteIfExists, getFileAttributeView, getFileStore, getFileSystem, getPath, getScheme, isHidden, isSameFile, move, newAsynchronousFileChannel, newByteChannel, newFileChannel, newFileSystem, newFileSystem, newInputStream, newOutputStream, onClose, readAttributes, readAttributes, readSymbolicLink, setAttribute, toDelegate, toString`

    - ### Methods inherited from class java.nio.file.spi.FileSystemProvider

      `installedProviders`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### ShuffleFS

          public ShuffleFS(FileSystem delegate,
                           long seed)

      Create a new instance, wrapping `delegate`.

  - ### Method Detail

    - #### newDirectoryStream

          public DirectoryStream<Path> newDirectoryStream(Path dir,
                                                          DirectoryStream.Filter<? super Path> filter)
                                                   throws IOException

      Overrides:
        `newDirectoryStream` in class `FilterFileSystemProvider`
      Throws:
        `IOException`

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