oracle.spatial.hadoop.vector.cluster.kmeans.mapred

Class PointKeyInputFormat<K,V>

java.lang.Object

org.apache.hadoop.mapred.FileInputFormat<K,V>

oracle.spatial.hadoop.vector.mapred.input.CompositeInputFormat<PointWritable,org.apache.hadoop.io.NullWritable>

oracle.spatial.hadoop.vector.cluster.kmeans.mapred.PointKeyInputFormat<K,V>

Type Parameters:

K -

V -

All Implemented Interfaces:

org.apache.hadoop.mapred.InputFormat<PointWritable,org.apache.hadoop.io.NullWritable>, org.apache.hadoop.mapred.JobConfigurable

public class PointKeyInputFormat<K,V>
extends CompositeInputFormat<PointWritable,org.apache.hadoop.io.NullWritable>

InputFormat implementation that returns each input record with spatial information as single point. If the record's geometry is different than point, a centroid is calculated. This class is used along with KMeansSampler.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapred.FileInputFormat

org.apache.hadoop.mapred.FileInputFormat.Counter

Field Summary

Fields inherited from class oracle.spatial.hadoop.vector.mapred.input.CompositeInputFormat

iInputFormat

Fields inherited from class org.apache.hadoop.mapred.FileInputFormat

INPUT_DIR_RECURSIVE, NUM_INPUT_FILES

Constructor Summary

Constructors

Constructor and Description
PointKeyInputFormat()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.mapred.RecordReader<PointWritable,org.apache.hadoop.io.NullWritable>	getDelegateRecordReader(org.apache.hadoop.mapred.FileSplit split, org.apache.hadoop.mapred.JobConf conf, org.apache.hadoop.mapred.Reporter reporter) Creates a record reader instance.

Methods inherited from class oracle.spatial.hadoop.vector.mapred.input.CompositeInputFormat

configure, getFittingInputSplit, getInternalInputFormat, getInternalInputFormatClass, getRecordInfoProvider, getRecordInfoProviderClass, getRecordReader, getSplits, setInternalInputFormatClass, setRecordInfoProviderClass

Methods inherited from class org.apache.hadoop.mapred.FileInputFormat

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getInputPathFilter, getInputPaths, getSplitHosts, isSplitable, listStatus, makeSplit, makeSplit, setInputPathFilter, setInputPaths, setInputPaths, setMinSplitSize

Methods inherited from class java.lang.Object

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

Constructor Detail

PointKeyInputFormat

public PointKeyInputFormat()

Method Detail

getDelegateRecordReader

public org.apache.hadoop.mapred.RecordReader<PointWritable,org.apache.hadoop.io.NullWritable> getDelegateRecordReader(org.apache.hadoop.mapred.FileSplit split,
                                                                                                                      org.apache.hadoop.mapred.JobConf conf,
                                                                                                                      org.apache.hadoop.mapred.Reporter reporter)
                                                                                                               throws java.io.IOException

Description copied from class: CompositeInputFormat

Creates a record reader instance. The returned record instance can be a wrapper of the internalInputFormat's record reader. This method is called after getRecordReader(). If the internalInputFormat is a CombineFileInputFormat subclass, this method can be called as many times as paths are contained in the CombineFileSplits.

Specified by:

getDelegateRecordReader in class CompositeInputFormat<PointWritable,org.apache.hadoop.io.NullWritable>

Parameters:

split - a FileSplit instance

conf - the job configuration

reporter - a Reporter instance

Returns:

a RecordReader instance.

Throws:

java.io.IOException