uk.ac.gla.dcs.renaissance.iqir
Class IndexedSubspaceBuilder

java.lang.Object
  bpiwowar.db.BatchFileStorage<Integer,bpiwowar.db.BatchFileStorage.IntegerLocation,DensityTracker>
      uk.ac.gla.dcs.renaissance.iqir.IndexedSubspaceBuilder

All Implemented Interfaces:

Iterable<Map.Entry<Integer,DensityTracker>>

Direct Known Subclasses:

KeywordsSubspaceBuilder

public class IndexedSubspaceBuilder
extends bpiwowar.db.BatchFileStorage<Integer,bpiwowar.db.BatchFileStorage.IntegerLocation,DensityTracker>

Author:

Benjamin Piwowarski

Nested Class Summary

Nested classes/interfaces inherited from class bpiwowar.db.BatchFileStorage

bpiwowar.db.BatchFileStorage.IntegerLocation, bpiwowar.db.BatchFileStorage.Location<K>, bpiwowar.db.BatchFileStorage.StringLocation

Field Summary

Fields inherited from class bpiwowar.db.BatchFileStorage

locationStore

Constructor Summary

IndexedSubspaceBuilder(com.sleepycat.je.Environment dbenv, String dbname, boolean destroy, int nbThreads)

Method Summary

protected void	add(int i, bpiwowar.maths.matrix.DoubleMatrix1D v)
void	flush(bpiwowar.log.TaskTimer timer) Update the subspaces
void	setCompaction(int compactInterval, double compactThreshold)
void	setMaxSVDRank(int maxRank)
void	setStoreVectorSum(boolean storeVectorSum)

Methods inherited from class bpiwowar.db.BatchFileStorage

cleanup, close, closeOpenedBatches, count, finalize, getCurrentBatchIndex, getHome, getLocation, getObjectSize, getStoredObject, getStoredObject, hasObject, isCompressed, iterator, keyIterator, keys, nextBatch, outputObject, readObject, storeObject, storeObject, storeObject, storeObject, toString, writeObject

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexedSubspaceBuilder

public IndexedSubspaceBuilder(com.sleepycat.je.Environment dbenv,
                              String dbname,
                              boolean destroy,
                              int nbThreads)
                       throws com.sleepycat.persist.evolve.IncompatibleClassException,
                              com.sleepycat.je.DatabaseException

Throws:

com.sleepycat.persist.evolve.IncompatibleClassException

com.sleepycat.je.DatabaseException

Method Detail

setStoreVectorSum

public void setStoreVectorSum(boolean storeVectorSum)

add

protected void add(int i,
                   bpiwowar.maths.matrix.DoubleMatrix1D v)

flush

public void flush(bpiwowar.log.TaskTimer timer)
           throws IOException,
                  com.sleepycat.je.DatabaseException

Update the subspaces

Parameters:

timer -

Throws:

IOException - If there are troubles when writing

com.sleepycat.je.DatabaseException

setMaxSVDRank

public void setMaxSVDRank(int maxRank)

setCompaction

public void setCompaction(int compactInterval,
                          double compactThreshold)