edu.iu.dsc.tws.tset.sources

Class DiskPartitionBackedSourceWrapper<T>

java.lang.Object

edu.iu.dsc.tws.api.tset.fn.BaseTFunction<T,T>

edu.iu.dsc.tws.api.tset.fn.BaseSourceFunc<T>

edu.iu.dsc.tws.tset.sources.DiskPartitionBackedSourceWrapper<T>

Type Parameters:

T - type

All Implemented Interfaces:

SourceFunc<T>, TFunction<T,T>, java.io.Serializable

public class DiskPartitionBackedSourceWrapper<T>
extends BaseSourceFunc<T>

Wraps the data partition created by underlying DiskPartitionBackedSource. This is used for checkpointing purposes. Not intended to be used as a usual source.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DiskPartitionBackedSourceWrapper(DiskPartitionBackedSource<T> sourceFunc)

Method Summary

Modifier and Type	Method and Description
DataPartition<?>	get()
boolean	hasNext() Weather we have more data
T	next() Get the next value
void	prepare(TSetContext ctx) Prepare the function.

Methods inherited from class edu.iu.dsc.tws.api.tset.fn.BaseTFunction

getInput, getTSetContext

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.iu.dsc.tws.api.tset.fn.SourceFunc

close

Methods inherited from interface edu.iu.dsc.tws.api.tset.fn.TFunction

end

Constructor Detail

DiskPartitionBackedSourceWrapper

public DiskPartitionBackedSourceWrapper(DiskPartitionBackedSource<T> sourceFunc)

Method Detail

prepare

public void prepare(TSetContext ctx)

Description copied from interface: TFunction

Prepare the function. Use this context in case you need to add/get inputs

Specified by:

prepare in interface TFunction<T,T>

Overrides:

prepare in class BaseTFunction<T,T>

Parameters:

ctx - CONTEXT

hasNext

public boolean hasNext()

Description copied from interface: SourceFunc

Weather we have more data

Returns:

true if there is more data to be read

next

public T next()

Description copied from interface: SourceFunc

Get the next value

Returns:

the next value

get

public DataPartition<?> get()