edu.umn.cs.spatialHadoop.core

Class GridPartitioner

java.lang.Object

edu.umn.cs.spatialHadoop.core.Partitioner

edu.umn.cs.spatialHadoop.core.GridPartitioner

public class GridPartitioner
extends Partitioner

A partitioner that partitioner data using a uniform grid. If a shape overlaps multiple grids, it replicates it to all overlapping partitions.

Author:

Ahmed Eldawy

Constructor Summary

Constructors

Constructor and Description
GridPartitioner() A default constructor to be able to dynamically instantiate it and deserialize it
GridPartitioner(Path[] inFiles, JobConf job) Initializes a grid partitioner for a given file
GridPartitioner(Path[] inFiles, JobConf job, int width, int height)

Method Summary

Methods

Modifier and Type	Method and Description
CellInfo	getPartition(int partitionID) Returns the details of a specific partition.
void	overlapPartitions(Shape shape, ResultCollector<java.lang.Integer> matcher) Overlap a shape with partitions and calls a matcher for each overlapping partition.
void	readFields(java.io.DataInput in)
void	write(java.io.DataOutput out)

Methods inherited from class edu.umn.cs.spatialHadoop.core.Partitioner

getPartitioner, setPartitioner

Methods inherited from class java.lang.Object

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

Constructor Detail

GridPartitioner

public GridPartitioner()

A default constructor to be able to dynamically instantiate it and deserialize it

GridPartitioner

public GridPartitioner(Path[] inFiles,
               JobConf job)

Initializes a grid partitioner for a given file

Parameters:

inFile -

params -

GridPartitioner

public GridPartitioner(Path[] inFiles,
               JobConf job,
               int width,
               int height)

Method Detail

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Throws:

java.io.IOException

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Throws:

java.io.IOException

overlapPartitions

public void overlapPartitions(Shape shape,
                     ResultCollector<java.lang.Integer> matcher)

Description copied from class: Partitioner

Overlap a shape with partitions and calls a matcher for each overlapping partition.

Specified by:

overlapPartitions in class Partitioner

getPartition

public CellInfo getPartition(int partitionID)

Description copied from class: Partitioner

Returns the details of a specific partition.

Specified by:

getPartition in class Partitioner

Returns: