Package org.openrefine.runners.local.pll.partitioning

Class CroppedPartitioner<T>

java.lang.Object

org.openrefine.runners.local.pll.partitioning.CroppedPartitioner<T>

Type Parameters:

T -

All Implemented Interfaces:

Partitioner<T>

public class CroppedPartitioner<T>
extends Object
implements Partitioner<T>

A partitionner for a PLL which was amputed from some partitions.

Author:

Antonin Delpeuch

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CroppedPartitioner(Partitioner<T> parent, int partitionsToDrop, boolean atEnd)	Constructs the partitioner based on the partitioner for the uncropped PLL.

Method Summary

Modifier and Type	Method	Description
static <T> Partitioner<T>	crop(Partitioner<T> partitioner, int partitionsToDrop, boolean atEnd)	Constructs the partitioner based on the partitioner for the uncropped PLL.
int	getPartition(T key)	Retrieves the partition id given a key.
int	numPartitions()	Returns the number of partitions assumed by this partitioner.

Methods inherited from class java.lang.Object

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

Constructor Detail

CroppedPartitioner

protected CroppedPartitioner(Partitioner<T> parent,
                             int partitionsToDrop,
                             boolean atEnd)

Constructs the partitioner based on the partitioner for the uncropped PLL.

Parameters:

parent - the partitioner for the original PLL

partitionsToDrop - the number of partitions which were dropped from that PLL

atEnd - true if the partitions were dropped at the end, false if at the beginning

See Also:

which attempts to preserve the partioner type

Method Detail

getPartition

public int getPartition(T key)

Description copied from interface: Partitioner

Retrieves the partition id given a key.

Specified by:

getPartition in interface Partitioner<T>

Returns:

numPartitions

public int numPartitions()

Description copied from interface: Partitioner

Returns the number of partitions assumed by this partitioner.

Specified by:

numPartitions in interface Partitioner<T>

crop

public static <T> Partitioner<T> crop(Partitioner<T> partitioner,
                                      int partitionsToDrop,
                                      boolean atEnd)

Constructs the partitioner based on the partitioner for the uncropped PLL.

Parameters:

partitioner - the partitioner for the original PLL

partitionsToDrop - the number of partitions which were dropped from that PLL

atEnd - true if the partitions were dropped at the end, false if at the beginning