org.apache.mahout.clustering.topdown.postprocessor

Class ClusterCountReader

java.lang.Object

org.apache.mahout.clustering.topdown.postprocessor.ClusterCountReader

public final class ClusterCountReader
extends Object

Reads the number of clusters produced by the clustering algorithm.

Method Summary

Modifier and Type	Method and Description
static Map<Integer,Integer>	getClusterIDs(org.apache.hadoop.fs.Path clusterOutputPath, org.apache.hadoop.conf.Configuration conf, boolean keyIsClusterId) Generates a list of all cluster ids by reading the clusters-*-final file.
static int	getNumberOfClusters(org.apache.hadoop.fs.Path clusterOutputPath, org.apache.hadoop.conf.Configuration conf) Reads the number of clusters present by reading the clusters-*-final file.

Methods inherited from class java.lang.Object

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

Method Detail

getNumberOfClusters

public static int getNumberOfClusters(org.apache.hadoop.fs.Path clusterOutputPath,
                                      org.apache.hadoop.conf.Configuration conf)
                               throws IOException

Reads the number of clusters present by reading the clusters-*-final file.

Parameters:

clusterOutputPath - The output path provided to the clustering algorithm.

conf - The hadoop configuration.

Returns:

the number of final clusters.

Throws:

IOException

getClusterIDs

public static Map<Integer,Integer> getClusterIDs(org.apache.hadoop.fs.Path clusterOutputPath,
                                                 org.apache.hadoop.conf.Configuration conf,
                                                 boolean keyIsClusterId)
                                          throws IOException

Generates a list of all cluster ids by reading the clusters-*-final file.

Parameters:

clusterOutputPath - The output path provided to the clustering algorithm.

conf - The hadoop configuration.

Returns:

An ArrayList containing the final cluster ids.

Throws:

IOException