oracle.spatial.hadoop.vector.partition.mapred

Class HilbertValueMapper

java.lang.Object

org.apache.hadoop.mapred.MapReduceBase

oracle.spatial.hadoop.vector.partition.mapred.HilbertValueMapper

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.NullWritable,org.apache.hadoop.mapred.FileSplit,HilbertValueGroup,RecordInfo>

public class HilbertValueMapper
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.NullWritable,org.apache.hadoop.mapred.FileSplit,HilbertValueGroup,RecordInfo>

Calculates a hilbert value for every point of each input record geometry. The hilbert value is emitted along with the input record as a RecordInfo value. The emitted key contains a fixed group id so can be grouped in one single group.

Constructor Summary

Constructors

Constructor and Description
HilbertValueMapper()

Method Summary

Modifier and Type	Method and Description
void	configure(org.apache.hadoop.mapred.JobConf jobConf)
void	map(org.apache.hadoop.io.NullWritable key, org.apache.hadoop.mapred.FileSplit value, org.apache.hadoop.mapred.OutputCollector<HilbertValueGroup,RecordInfo> output, org.apache.hadoop.mapred.Reporter reporter)

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

close

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.Closeable

close

Constructor Detail

HilbertValueMapper

public HilbertValueMapper()

Method Detail

configure

public void configure(org.apache.hadoop.mapred.JobConf jobConf)

Specified by:

configure in interface org.apache.hadoop.mapred.JobConfigurable

Overrides:

configure in class org.apache.hadoop.mapred.MapReduceBase

map

public void map(org.apache.hadoop.io.NullWritable key,
                org.apache.hadoop.mapred.FileSplit value,
                org.apache.hadoop.mapred.OutputCollector<HilbertValueGroup,RecordInfo> output,
                org.apache.hadoop.mapred.Reporter reporter)
         throws java.io.IOException

Specified by:

map in interface org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.NullWritable,org.apache.hadoop.mapred.FileSplit,HilbertValueGroup,RecordInfo>

Throws:

java.io.IOException