org.datavec.api.split

Class CollectionInputSplit

java.lang.Object

org.datavec.api.split.BaseInputSplit

org.datavec.api.split.CollectionInputSplit

All Implemented Interfaces:

InputSplit

public class CollectionInputSplit
extends BaseInputSplit

A simple InputSplit based on a collection of URIs

Author:

Alex Black

Field Summary

Fields inherited from class org.datavec.api.split.BaseInputSplit

iterationOrder, length, uriStrings

Constructor Summary

Constructors

Constructor and Description
CollectionInputSplit(Collection<URI> list)
CollectionInputSplit(URI[] array)

Method Summary

Modifier and Type	Method and Description
void	bootStrapForWrite() Bootstrap this input split for writing.
long	length() Length of the split
boolean	needsBootstrapForWrite() Returns true if this InputSplit needs bootstrapping for writing.
InputStream	openInputStreamFor(String location) Open an InputStream for the given location.
OutputStream	openOutputStreamFor(String location) Open an OutputStream for the given location.
void	reset() Reset the InputSplit without reinitializing it from scratch.
boolean	resetSupported()
void	updateSplitLocations(boolean reset) Refreshes the split locations if needed in memory.

Methods inherited from class org.datavec.api.split.BaseInputSplit

addNewLocation, addNewLocation, canWriteToLocation, locations, locationsIterator, locationsPathIterator, sample

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionInputSplit

public CollectionInputSplit(URI[] array)

CollectionInputSplit

public CollectionInputSplit(Collection<URI> list)

Method Detail

updateSplitLocations

public void updateSplitLocations(boolean reset)

Description copied from interface: InputSplit

Refreshes the split locations if needed in memory. (Think a few file gets added)

needsBootstrapForWrite

public boolean needsBootstrapForWrite()

Description copied from interface: InputSplit

Returns true if this InputSplit needs bootstrapping for writing. A simple example of needing bootstrapping is for FileSplit where there is only a directory existing, but no file to write to

Returns:

true if this input split needs bootstrapping for writing to or not

bootStrapForWrite

public void bootStrapForWrite()

Description copied from interface: InputSplit

Bootstrap this input split for writing. This is for use with RecordWriter

openOutputStreamFor

public OutputStream openOutputStreamFor(String location)
                                 throws Exception

Description copied from interface: InputSplit

Open an OutputStream for the given location. Note that the user is responsible for closing the associated output stream.

Parameters:

location - the location to open the output stream for

Returns:

the output input stream

Throws:

Exception

openInputStreamFor

public InputStream openInputStreamFor(String location)
                               throws Exception

Description copied from interface: InputSplit

Open an InputStream for the given location. Note that the user is responsible for closing the associated input stream.

Parameters:

location - the location to open the input stream for

Returns:

the opened input stream

Throws:

Exception

length

public long length()

Description copied from interface: InputSplit

Length of the split

Specified by:

length in interface InputSplit

Overrides:

length in class BaseInputSplit

Returns:

reset

public void reset()

Description copied from interface: InputSplit

Reset the InputSplit without reinitializing it from scratch. In many cases, this is a no-op. For InputSplits that have randomization: reset should shuffle the order.

resetSupported

public boolean resetSupported()

Returns:

True if the reset() method is supported (or is a no-op), false otherwise. If false is returned, reset() may throw an exception