ivory.lsh.projection

Class ComputeSignaturesRandom.MyMapper

java.lang.Object

org.apache.hadoop.mapred.MapReduceBase

ivory.lsh.projection.ComputeSignaturesRandom.MyMapper

All Implemented Interfaces:

Closeable, AutoCloseable, JobConfigurable, Mapper<IntWritable,WeightedIntDocVector,IntWritable,NBitSignature>

Enclosing class:

ComputeSignaturesRandom

public static class ComputeSignaturesRandom.MyMapper
extends MapReduceBase
implements Mapper<IntWritable,WeightedIntDocVector,IntWritable,NBitSignature>

Convert int doc vectors into NBitSignature objects using LSH.

Author:

ferhanture

Constructor Summary

Constructors

Constructor and Description
ComputeSignaturesRandom.MyMapper()

Method Summary

Methods

Modifier and Type	Method and Description
void	configure(JobConf job)
static double	dotProduct(HMapIFW docvector, ArrayListOfFloatsWritable vector)
static double	dotProduct(HMapIFW docvector, FloatAsBytesWritable vector)
void	map(IntWritable docno, WeightedIntDocVector docvectorIn, OutputCollector<IntWritable,NBitSignature> output, Reporter reporter)

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

close

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.Closeable

close

Constructor Detail

ComputeSignaturesRandom.MyMapper

public ComputeSignaturesRandom.MyMapper()

Method Detail

configure

public void configure(JobConf job)

Specified by:

configure in interface JobConfigurable

Overrides:

configure in class MapReduceBase

dotProduct

public static double dotProduct(HMapIFW docvector,
                ArrayListOfFloatsWritable vector)

dotProduct

public static double dotProduct(HMapIFW docvector,
                FloatAsBytesWritable vector)

map

public void map(IntWritable docno,
       WeightedIntDocVector docvectorIn,
       OutputCollector<IntWritable,NBitSignature> output,
       Reporter reporter)
         throws IOException

Specified by:

map in interface Mapper<IntWritable,WeightedIntDocVector,IntWritable,NBitSignature>

Throws:

IOException