oracle.spatial.hadoop.vector.mapred

Class MVSHierachicalCountMapper<K,V>

java.lang.Object

org.apache.hadoop.mapred.MapReduceBase

oracle.spatial.hadoop.vector.mapred.MVSHierachicalCountMapper<K,V>

Type Parameters:

K - The type of the internalInputFormat's keys

V - The type of the internalInputFormat's values

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,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>

public class MVSHierachicalCountMapper<K,V>
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.NullWritable,org.apache.hadoop.mapred.FileSplit,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>

This mapper implementation catalogs records in different hierarchy levels using MVSuggest.

The output key is a combination of the hierarchy layer's name and the hierarchy level's feature id. The value is the number of records counted for the key's feature

Expected configuration:

• ConfigParams.INTERNAL_INPUT_FORMAT
• ConfigParams.RECORD_INFO_PROVIDER
• ConfigParams.HIERARCHY_INFO_CLASS
• MVSConfig.CONF_SERVCE_LOCATION

Constructor Summary

Constructors

Constructor and Description
MVSHierachicalCountMapper()

Method Summary

Methods

Modifier and Type	Method and Description
void	configure(org.apache.hadoop.mapred.JobConf conf)
void	map(org.apache.hadoop.io.NullWritable key, org.apache.hadoop.mapred.FileSplit value, org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable> 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

MVSHierachicalCountMapper

public MVSHierachicalCountMapper()

Method Detail

configure

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

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<org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable> 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,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>

Throws:

java.io.IOException