cascading.tap.type
Interface FileType<Config>

All Known Implementing Classes:

Dfs, FileTap, Hfs, Lfs, TempHfs

public interface FileType<Config>

Interface FileType marks specific platform Tap classes as representing a file like interface.

Method Summary

String[]	getChildIdentifiers(Config conf) Method getChildIdentifiers returns an array of child identifiers if this resource is a directory.
long	getSize(Config conf) Method getSize returns the size of the file referenced by this tap.
boolean	isDirectory(Config conf) Method isDirectory returns true if the underlying resource represents a directory or folder instead of an individual file.

Method Detail

isDirectory

boolean isDirectory(Config conf)
                    throws IOException

Method isDirectory returns true if the underlying resource represents a directory or folder instead of an individual file.

Parameters:

conf - of JobConf

Returns:

boolean

Throws:

IOException

getChildIdentifiers

String[] getChildIdentifiers(Config conf)
                             throws IOException

Method getChildIdentifiers returns an array of child identifiers if this resource is a directory.

This method will skip Hadoop log directories (_log).

Parameters:

conf - of JobConf

Returns:

String[]

Throws:

IOException

getSize

long getSize(Config conf)
             throws IOException

Method getSize returns the size of the file referenced by this tap.

Parameters:

conf - of type Config

Returns:

The size of the file reference by this tap.

Throws:

IOException