alluxio.underfs

Interface ObjectUnderFileSystem.ObjectListingChunk

All Known Implementing Classes:

S3AUnderFileSystem.S3AObjectListingChunk, S3AUnderFileSystem.S3AObjectListingChunkV1

Enclosing class:

ObjectUnderFileSystem

public static interface ObjectUnderFileSystem.ObjectListingChunk

A chunk of listing results.

Method Summary

Modifier and Type	Method and Description
String[]	getCommonPrefixes() Use common prefixes to infer pseudo-directories in object store.
ObjectUnderFileSystem.ObjectListingChunk	getNextChunk() Gets next chunk of object listings.
ObjectUnderFileSystem.ObjectStatus[]	getObjectStatuses() Returns objects in a pseudo-directory which may be a file or a directory.
default Boolean	hasNextChunk() Gets if there is more chunks to fetch WITHOUT actually fetching the next chunk.

Method Detail

getObjectStatuses

ObjectUnderFileSystem.ObjectStatus[] getObjectStatuses()

Returns objects in a pseudo-directory which may be a file or a directory.

Returns:

a list of object statuses

getCommonPrefixes

String[] getCommonPrefixes()

Use common prefixes to infer pseudo-directories in object store.

Returns:

a list of common prefixes

getNextChunk

@Nullable
ObjectUnderFileSystem.ObjectListingChunk getNextChunk()
                                                         throws IOException

Gets next chunk of object listings.

Returns:

null if listing did not find anything or is done, otherwise return new ObjectUnderFileSystem.ObjectListingChunk for the next chunk

Throws:

IOException

hasNextChunk

@Nullable
default Boolean hasNextChunk()

Gets if there is more chunks to fetch WITHOUT actually fetching the next chunk.

Returns:

true if there is, no if there isn't, NULL if it cannot tell